feat(files): orchestrate connector folder sync

.gitea/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,35 @@
+---
+name: "Bug"
+about: "Report a reproducible defect, regression, or incorrect behavior"
+title: "[Bug] "
+labels:
+  - type/bug
+  - status/triage
+  - module/files
+---
+
+## Scope
+
+- Repository:
+- Area/module:
+- Affected version or commit:
+
+## Behavior
+
+Expected:
+
+Actual:
+
+## Reproduction
+
+1.
+2.
+3.
+
+## Evidence
+
+Logs, screenshots, traces, or failing test output:
+
+## Verification Target
+
+Command or workflow that should pass when fixed:

.gitea/ISSUE_TEMPLATE/config.yaml

@@ -0,0 +1 @@
+blank_issues_enabled: false

.gitea/ISSUE_TEMPLATE/docs_workflow.md

@@ -0,0 +1,27 @@
+---
+name: "Docs / workflow"
+about: "Request documentation, process, or developer workflow changes"
+title: "[Docs] "
+labels:
+  - type/docs
+  - status/triage
+  - module/files
+  - area/docs
+---
+
+## Scope
+
+- Repository:
+- Document or workflow:
+
+## Current State
+
+What is missing, unclear, duplicated, or stale?
+
+## Desired State
+
+What should the docs or workflow make clear?
+
+## Verification Target
+
+How should this be checked?

.gitea/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,32 @@
+---
+name: "Feature"
+about: "Propose new user-visible behavior or platform capability"
+title: "[Feature] "
+labels:
+  - type/feature
+  - status/triage
+  - module/files
+---
+
+## Problem
+
+What user, operator, or developer problem should this solve?
+
+## Proposed Capability
+
+What should exist when this is done?
+
+## Ownership
+
+- Owning repository:
+- Related module repositories:
+- Extension point or integration boundary:
+
+## Acceptance Criteria
+
+- [ ]
+- [ ]
+
+## Verification Target
+
+Command, scenario, or UI flow that should prove completion:

.gitea/ISSUE_TEMPLATE/task.md

@@ -0,0 +1,28 @@
+---
+name: "Task"
+about: "Track implementation, maintenance, or migration work"
+title: "[Task] "
+labels:
+  - type/task
+  - status/triage
+  - module/files
+---
+
+## Objective
+
+What needs to be completed?
+
+## Scope
+
+- Owning repository:
+- In-scope:
+- Out-of-scope:
+
+## Checklist
+
+- [ ]
+- [ ]
+
+## Verification Target
+
+Command or manual check:

.gitea/ISSUE_TEMPLATE/tech_debt.md

@@ -0,0 +1,25 @@
+---
+name: "Tech debt"
+about: "Track cleanup, refactoring, risk reduction, or deferred engineering work"
+title: "[Debt] "
+labels:
+  - type/debt
+  - status/triage
+  - module/files
+---
+
+## Current Cost
+
+What does this make harder, riskier, slower, or more fragile?
+
+## Desired Shape
+
+What should the code, tests, or architecture look like afterwards?
+
+## Constraints
+
+What behavior, compatibility, or module boundary must be preserved?
+
+## Verification Target
+
+Focused checks that should pass:

.gitea/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,15 @@
+## Issue
+
+Closes #
+
+## Summary
+
+-
+
+## Verification
+
+-
+
+## Notes
+
+Follow-up issues:

.gitea/workflows/module-package-release.yml

@@ -0,0 +1,270 @@
+name: Module Package Release
+
+on:
+  push:
+    tags:
+      - "v*"
+  workflow_dispatch:
+    inputs:
+      release_tag:
+        description: Existing protected version tag to publish
+        required: true
+        type: string
+
+jobs:
+  publish-packages:
+    runs-on: ubuntu-latest
+    env:
+      GITEA_REPOSITORY: ${{ gitea.repository }}
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065
+        with:
+          python-version: "3.12"
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020
+        with:
+          node-version: "22"
+      - name: Select and validate protected release tag
+        shell: bash
+        env:
+          REQUESTED_TAG: ${{ inputs.release_tag }}
+          TRIGGER_TAG: ${{ gitea.ref_name }}
+        run: |
+          set -euo pipefail
+          tag="${REQUESTED_TAG:-$TRIGGER_TAG}"
+          case "$tag" in
+            v[0-9]*.[0-9]*.[0-9]*) ;;
+            *) echo "Release tag must start with a SemVer-shaped vX.Y.Z value" >&2; exit 1 ;;
+          esac
+          git fetch --force origin "refs/tags/$tag:refs/tags/$tag" refs/heads/main:refs/remotes/origin/main
+          tag_commit="$(git rev-list -n 1 "$tag")"
+          git merge-base --is-ancestor "$tag_commit" refs/remotes/origin/main || {
+            echo "Release tag is not contained in main" >&2
+            exit 1
+          }
+          git checkout --detach "$tag"
+          printf 'RELEASE_TAG=%s\n' "$tag" >> "$GITEA_ENV"
+          printf 'SOURCE_DATE_EPOCH=%s\n' "$(git show -s --format=%ct HEAD)" >> "$GITEA_ENV"
+      - name: Validate package versions
+        run: |
+          python - <<'PY'
+          import json
+          from pathlib import Path
+          import os
+          import re
+          import tomllib
+
+          tag = os.environ["RELEASE_TAG"]
+          expected = tag.removeprefix("v")
+          project = tomllib.loads(Path("pyproject.toml").read_text(encoding="utf-8"))["project"]
+          if project.get("version") != expected:
+              raise SystemExit(f"pyproject version {project.get('version')!r} does not match {tag}")
+          if re.fullmatch(r"govoplan-[a-z0-9-]+", str(project.get("name", ""))) is None:
+              raise SystemExit("Python distribution name must use the govoplan-* namespace")
+          webui = Path("webui/package.json")
+          if webui.is_file():
+              package = json.loads(webui.read_text(encoding="utf-8"))
+              if package.get("version") != expected:
+                  raise SystemExit(f"WebUI version {package.get('version')!r} does not match {tag}")
+              if re.fullmatch(r"@govoplan/[a-z0-9-]+-webui", str(package.get("name", ""))) is None:
+                  raise SystemExit("WebUI package name must use the @govoplan/*-webui namespace")
+              release = Path("webui/package.release.json")
+              if release.is_file():
+                  release_package = json.loads(release.read_text(encoding="utf-8"))
+                  if (
+                      release_package.get("name") != package.get("name")
+                      or release_package.get("version") != expected
+                  ):
+                      raise SystemExit("WebUI release package identity does not match package.json and the release tag")
+          PY
+      - name: Build immutable package artifacts
+        shell: bash
+        run: |
+          set -euo pipefail
+          python -m pip install --disable-pip-version-check build==1.5.0 twine==7.0.0
+          rm -rf dist .package-webui
+          python -m build --wheel --outdir dist
+          python -m twine check dist/*.whl
+          if [[ -f webui/package.json ]]; then
+            mkdir .package-webui
+            cp -a webui/. .package-webui/
+            rm -rf .package-webui/node_modules .package-webui/dist
+            if [[ -f .package-webui/package.release.json ]]; then
+              cp .package-webui/package.release.json .package-webui/package.json
+            fi
+          node <<'NODE'
+          const fs = require("node:fs");
+          const path = ".package-webui/package.json";
+          const packageJson = JSON.parse(fs.readFileSync(path, "utf8"));
+          const groups = ["dependencies", "optionalDependencies", "peerDependencies"];
+          for (const group of groups) {
+            for (const [name, specifier] of Object.entries(packageJson[group] || {})) {
+              if (!name.startsWith("@govoplan/")) continue;
+              if (typeof specifier !== "string") {
+                throw new Error(`${group}.${name} must use a string version`);
+              }
+              const packageSlug = name.slice("@govoplan/".length);
+              if (!packageSlug.endsWith("-webui")) {
+                throw new Error(`${group}.${name} is outside the WebUI package namespace`);
+              }
+              const repository = `govoplan-${packageSlug.slice(0, -"-webui".length)}`;
+              const escapedRepository = repository.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
+              const gitTag = specifier.match(
+                new RegExp(
+                  `^git\\+(?:ssh://git@|https://)git\\.add-ideas\\.de/(?:GovOPlaN|add-ideas)/${escapedRepository}\\.git#v([0-9]+\\.[0-9]+\\.[0-9]+)$`,
+                ),
+              );
+              if (gitTag) {
+                packageJson[group][name] = gitTag[1];
+                continue;
+              }
+              if (specifier.startsWith("file:") || specifier.startsWith("git+")) {
+                throw new Error(
+                  `${group}.${name} must resolve to an exact registry version for publication`,
+                );
+              }
+            }
+          }
+          delete packageJson.private;
+          fs.writeFileSync(path, `${JSON.stringify(packageJson, null, 2)}\n`);
+          NODE
+            npm pkg delete private --prefix .package-webui
+            (cd .package-webui && npm pack --ignore-scripts --pack-destination ../dist)
+          fi
+          python - <<'PY'
+          import hashlib
+          import json
+          from pathlib import Path
+          import os
+          import subprocess
+
+          artifacts = []
+          for path in sorted(Path("dist").iterdir()):
+              if path.suffix not in {".whl", ".tgz"}:
+                  continue
+              digest = hashlib.sha256(path.read_bytes()).hexdigest()
+              artifacts.append({"filename": path.name, "sha256": digest, "size": path.stat().st_size})
+          payload = {
+              "schema_version": "1",
+              "repository": os.environ["GITEA_REPOSITORY"],
+              "tag": os.environ["RELEASE_TAG"],
+              "commit": subprocess.check_output(["git", "rev-parse", "HEAD"], text=True).strip(),
+              "artifacts": artifacts,
+          }
+          Path("dist/package-artifacts.json").write_text(
+              json.dumps(payload, indent=2, sort_keys=True) + "\n",
+              encoding="utf-8",
+          )
+          PY
+      - name: Retain package hash evidence
+        uses: actions/upload-artifact@a8a3f3ad30e3422c9c7b888a15615d19a852ae32
+        with:
+          name: module-packages-${{ gitea.ref_name }}
+          path: dist/package-artifacts.json
+      - name: Check immutable registry state
+        shell: bash
+        env:
+          PACKAGE_TOKEN: ${{ secrets.GOVOPLAN_PACKAGE_TOKEN }}
+        run: |
+          set -euo pipefail
+          test -n "$PACKAGE_TOKEN"
+          python - <<'PY'
+          import hashlib
+          import json
+          import os
+          from pathlib import Path
+          import tomllib
+          from urllib.error import HTTPError
+          from urllib.parse import quote
+          from urllib.request import Request, urlopen
+
+          api_root = "https://git.add-ideas.de/api/v1/packages/GovOPlaN"
+          token = os.environ["PACKAGE_TOKEN"]
+
+          def should_publish(kind, name, version, path):
+              package_url = "/".join(
+                  (api_root, kind, quote(name, safe=""), quote(version, safe=""), "files")
+              )
+              request = Request(
+                  package_url,
+                  headers={"Accept": "application/json", "Authorization": f"token {token}"},
+              )
+              try:
+                  with urlopen(request, timeout=30) as response:
+                      files = json.load(response)
+              except HTTPError as exc:
+                  if exc.code == 404:
+                      print(f"{kind} package {name}=={version} is not published yet")
+                      return True
+                  raise
+              if not isinstance(files, list) or len(files) != 1:
+                  raise SystemExit(
+                      f"immutable {kind} package {name}=={version} has an unexpected file set"
+                  )
+              expected_sha256 = hashlib.sha256(path.read_bytes()).hexdigest()
+              if files[0].get("sha256") != expected_sha256:
+                  raise SystemExit(
+                      f"immutable {kind} package {name}=={version} already exists with a different SHA-256"
+                  )
+              print(f"verified existing {kind} package {name}=={version} ({expected_sha256})")
+              return False
+
+          project = tomllib.loads(Path("pyproject.toml").read_text(encoding="utf-8"))["project"]
+          wheels = tuple(Path("dist").glob("*.whl"))
+          if len(wheels) != 1:
+              raise SystemExit("release build must contain exactly one wheel")
+          publish_pypi = should_publish(
+              "pypi", str(project["name"]), str(project["version"]), wheels[0]
+          )
+
+          tarballs = tuple(Path("dist").glob("*.tgz"))
+          if len(tarballs) > 1:
+              raise SystemExit("release build must contain at most one npm package")
+          publish_npm = False
+          if tarballs:
+              webui = json.loads(
+                  Path(".package-webui/package.json").read_text(encoding="utf-8")
+              )
+              publish_npm = should_publish(
+                  "npm", str(webui["name"]), str(webui["version"]), tarballs[0]
+              )
+
+          with Path(os.environ["GITEA_ENV"]).open("a", encoding="utf-8") as env_file:
+              env_file.write(f"PUBLISH_PYPI={int(publish_pypi)}\n")
+              env_file.write(f"PUBLISH_NPM={int(publish_npm)}\n")
+          PY
+      - name: Publish wheel and WebUI package
+        shell: bash
+        env:
+          PACKAGE_USERNAME: ${{ secrets.GOVOPLAN_PACKAGE_USERNAME }}
+          PACKAGE_TOKEN: ${{ secrets.GOVOPLAN_PACKAGE_TOKEN }}
+        run: |
+          set -euo pipefail
+          test -n "$PACKAGE_USERNAME"
+          test -n "$PACKAGE_TOKEN"
+          if [[ "$PUBLISH_PYPI" == 1 ]]; then
+            TWINE_USERNAME="$PACKAGE_USERNAME" TWINE_PASSWORD="$PACKAGE_TOKEN" \
+              python -m twine upload --non-interactive \
+                --repository-url https://git.add-ideas.de/api/packages/GovOPlaN/pypi \
+                dist/*.whl
+          else
+            echo "Exact wheel is already present; skipping immutable retry."
+          fi
+          shopt -s nullglob
+          webui_packages=(dist/*.tgz)
+          if (( ${#webui_packages[@]} )) && [[ "$PUBLISH_NPM" == 1 ]]; then
+            npmrc="$(mktemp)"
+            trap 'rm -f "$npmrc"' EXIT
+            chmod 600 "$npmrc"
+            printf '%s\n' \
+              '@govoplan:registry=https://git.add-ideas.de/api/packages/GovOPlaN/npm/' \
+              "//git.add-ideas.de/api/packages/GovOPlaN/npm/:_authToken=$PACKAGE_TOKEN" \
+              > "$npmrc"
+            NPM_CONFIG_USERCONFIG="$npmrc" npm publish "./${webui_packages[0]}" \
+              --ignore-scripts --access public \
+              --registry https://git.add-ideas.de/api/packages/GovOPlaN/npm/
+          elif (( ${#webui_packages[@]} )); then
+            echo "Exact WebUI package is already present; skipping immutable retry."
+          fi

.gitignore

@@ -327,3 +327,21 @@ dist
 # Built Visual Studio Code Extensions
 *.vsix
 
+# GovOPlaN shared ignore rules from govoplan-core
+# Local WebUI test/build scratch directories
+.component-test-build/
+.module-test-build/
+.policy-test-build/
+.template-preview-test-build/
+.import-test-build/
+webui/.component-test-build/
+webui/.module-test-build/
+webui/.policy-test-build/
+webui/.template-preview-test-build/
+webui/.import-test-build/
+*.db
+# GovOPlaN local runtime state
+runtime/
+# GovOPlaN WebUI test output
+webui/.module-test-build/
+webui/.component-test-build/

AGENTS.md

@@ -1,5 +1,11 @@
 # GovOPlaN Files Codex Guide
 
+## Documentation Contract
+
+- Treat documentation as part of every behavior change. Update this module's manifest-driven `DocumentationTopic` contributions for affected user and administrator behavior.
+- Keep feature content here; `govoplan-docs` projects it without importing Files internals.
+- Maintain a static user/admin baseline and run `/mnt/DATA/git/govoplan/tools/checks/check-manifest-shapes.py` after behavior or manifest changes.
+
 ## Scope
 
 This repository owns the `files` module: managed file storage APIs, file metadata, shares, uploads/downloads, folder and pattern helpers, backend module manifest, and `@govoplan/files-webui`.
@@ -18,8 +24,8 @@ cd /mnt/DATA/git/govoplan-core
 For combined checks, run:
 
 ```bash
-cd /mnt/DATA/git/govoplan-core
-./scripts/check-focused.sh
+cd /mnt/DATA/git/govoplan
+tools/checks/check-focused.sh
 ```
 
 For WebUI permutation checks that include files:

README.md

@@ -1,5 +1,9 @@
 # govoplan-files
 
+<!-- govoplan-repository-type:start -->
+**Repository type:** module (domain).
+<!-- govoplan-repository-type:end -->
+
 GovOPlaN Files is the managed file module. It bundles backend storage APIs and the Files WebUI package so file features can be installed as one module.
 
 ## Ownership
@@ -46,10 +50,166 @@ Frontend package:
 @govoplan/files-webui
 ```
 
-The campaign module can integrate with files when both modules are installed, for example for managed attachment selection and campaign file sharing.
+The campaign module can integrate with files when both modules are installed,
+for example for managed attachment selection and campaign file sharing. Files
+does not import campaign internals; campaign share/existence checks use the core
+`campaigns.access` capability registered by the campaign module.
+
+Files also publishes the optional `privacy.dsar.files` capability. The Core
+data-subject workflow can use it to collect bounded, tenant-scoped file,
+version, share, folder, evidence, and non-secret configuration metadata for a
+direct membership subject. The provider may revoke a subject-targeted share or
+detach mutable actor references idempotently, but it never exports credential
+material or raw bytes and never bypasses Files retention, legal hold, evidence,
+purge approval, audit, or recovery controls. See the handbook's data-subject
+request coverage section for the review and erasure boundary.
 
 Platform RBAC and governance rules are documented in `govoplan-core/docs/`.
 
+Managed files can carry source provenance for connector and import workflows.
+Upload callers may provide `source_provenance_json` and `source_revision`; the
+module stores those values under file metadata, returns normalized
+`source_provenance` and `source_revision` fields in file responses, and carries
+them into managed campaign attachment matches for frozen execution evidence.
+
+Connector policy preflight is available through
+`POST /api/v1/files/connector-policy/evaluate`, and provenance-bearing uploads
+can pass `connector_policy_json` to enforce the same policy before file content
+is read. Policy payloads contain ordered `sources`; each source has
+`scope_type`, optional `scope_id`, optional `label`, and a `policy` object. The
+policy object supports `allow`/`allowlist`/`whitelist` and
+`deny`/`denylist`/`blacklist` rules for `connectors`, `providers`,
+`external_ids`, `external_paths`, and `external_urls`. Deny rules win across the
+hierarchy; allow rules narrow access at each source that defines them.
+
+Connector endpoint settings are exposed through governed connector profiles.
+Profiles can be supplied as JSON through
+`GOVOPLAN_FILES_CONNECTOR_PROFILES_JSON`, or from a JSON file path through
+`GOVOPLAN_FILES_CONNECTOR_PROFILES_FILE`. Each profile has an `id`, `provider`,
+`endpoint_url`, governance `scope_type`/`scope_id`, optional `capabilities`, and
+deployment-owned credential references such as `password_env`, `token_env`, or
+`secret_ref`. Environment references require an exact name in the deployment-wide
+`GOVOPLAN_CONNECTOR_SECRET_ENV_ALLOWLIST`; API-managed profiles cannot select
+process environment variables and may use only Files-owned encrypted password or
+token values. API-created `secret_ref` values fail closed until Files has an
+ownership contract that can confirm provider-side deletion. Legacy external
+references are treated as non-owned: deleting a profile or credential detaches
+and audits the reference but never passes it to an arbitrary secret provider.
+Profile and credential deletion immediately clears encrypted values, credential
+identities, deployment references, and private metadata in the same transaction
+as the non-secret audit record; an audit failure rolls the deletion back.
+`GET /api/v1/files/connectors/profiles` returns only profiles visible to the
+current principal (system, tenant, user, group, or accessible campaign scope) and
+redacts secret values and environment variable names. Use the returned
+`policy_sources` with connector policy preflight before importing files.
+`GET /api/v1/files/connectors/providers` exposes provider descriptors for
+Seafile, Nextcloud, WebDAV, SMB, NFS, and local filesystem connectors. The
+descriptor declares implementation status, optional dependencies, permission
+mapping, sync/index strategy, conflict handling, preview behavior, and audit
+events so provider coverage remains visible without forcing every optional
+protocol dependency to be installed.
+`GET /api/v1/files/connectors/profiles/{profile_id}/browse` provides read-only
+connector browsing. Browse entries use a shared `library`/`folder`/`file` shape,
+run profile policy with the `browse` operation, and support Seafile,
+WebDAV/Nextcloud, and SMB when the optional `smb` extra is installed. Seafile
+profiles browse libraries and directories via Seafile's read-only API; profiles
+can still opt into WebDAV browsing by setting `metadata.webdav_endpoint_url` or
+`metadata.browse_protocol` to `webdav`. S3-compatible profiles support bucket
+and prefix browsing when the optional `s3` extra is installed.
+`POST /api/v1/files/connectors/profiles/{profile_id}/import` imports a Seafile
+or WebDAV/Nextcloud/SMB file into managed storage through the same governance,
+conflict handling, source provenance, and connector audit path as direct
+uploads. The Seafile provider uses account-token auth and the native file
+download-link API; Nextcloud and generic WebDAV profiles use authenticated `GET`
+requests against the configured WebDAV endpoint. SMB profiles use
+`smb://server[:port]/share[/path]` endpoints and deployment-owned or encrypted
+stored credentials through `smbprotocol`. Files installs a pinned transport for
+every initial session, reconnect, alias, and DFS referral target. The deployment
+private-network policy is re-evaluated immediately before each socket opens.
+
+S3 connector browse/import binds botocore HTTP and HTTPS pools to the same pinned
+socket policy. Retries, redirects, endpoint discovery, bucket aliases, and new
+connections are therefore revalidated while TLS keeps the configured hostname
+for SNI and certificate checks. Connector clients do not use outbound proxies or
+ambient AWS credential discovery; configure credentials on the governed profile,
+or explicitly use an anonymous profile for public objects. Keep connector spaces
+read-only unless a remote write is explicitly needed.
+An S3 profile with the `write` capability can back a two-way connector space.
+`POST /api/v1/files/connector-spaces/{space_id}/write-back` then conditionally
+creates or replaces one remote object from a managed file, records durable
+recovery intent before the provider effect, and verifies request/content markers
+afterward. Automatic remote delete, rename, move, and ACL propagation remain
+disabled; other connector providers remain read-only.
+An incompatible SDK upgrade fails closed before a usable client/session is
+returned.
+
+Durable platform storage has a separate deployment boundary: installer-owned
+Garage is accepted only at its exact generated endpoint, while an
+operator-selected external backend requires a clean HTTPS origin and
+`FILE_STORAGE_S3_ENDPOINT_TRUSTED=true`. That flag is deployment configuration,
+cannot be supplied through a Files connector profile, and does not replace
+operator responsibility for DNS, certificates, egress, bucket policy,
+versioning, and recovery.
+
+The actual local/S3 backend implementation is owned by Core so Files, Campaign,
+and workers resolve the same object namespace. Files owns file metadata and key
+layout. Node-local storage is supported only for `local` or one-host
+`host-shared` profiles; multi-host `shared` deployments require S3.
+
+Destructive Files-module retirement applies the same credential lifecycle before
+dropping tables. Every remaining Files-owned encrypted connector secret is
+scrubbed and audited first, while legacy non-owned external references are
+detached and identified as such in the audit record. Retirement does not claim
+or attempt provider-side deletion for references Files cannot prove it owns.
+
+Local connector development assets live in `dev/connectors/`. The compose stack
+boots Nextcloud, Seafile, WebDAV, and SMB endpoints for provider development and
+manual interoperability testing.
+
+Connector and collaboration ownership boundaries are documented in
+`docs/CONNECTOR_BOUNDARY.md` and `docs/DOCUMENT_COLLABORATION_BOUNDARY.md`.
+The role-adaptive user, administration, integration, and operator guide is the
+[Files handbook](docs/FILES_HANDBOOK.md).
+The Files route, connector surfaces, consequence classes, and pattern-language
+verification are recorded in
+[Files interface pattern migration](docs/INTERFACE_PATTERN_MIGRATION.md).
+
+Archive imports use a two-phase preview and confirmation flow for ZIP, TAR,
+TAR.GZ, TAR.BZ2, and TAR.XZ. Requests are spooled to bounded temporary files;
+the server validates paths, entry count, expanded size, and expansion ratio,
+then returns a 30-minute tenant/user-bound preview token. Confirmation reuploads
+the original archive and stores only the selected members. Password-protected
+ZIP passwords remain request-only and are never included in the preview token.
+
+Managed blob writes and applied orphan cleanup use Core's durable recovery
+ledger. On PostgreSQL, intent, request digests, recovery mode, and a distributed
+lease are committed before physical storage effects; the Files session commit
+verifies database and streamed object evidence, while rollback compensates only
+a newly reserved unreferenced key. Development SQLite records blob intent in
+the caller transaction to avoid its second-writer deadlock, then verifies on
+commit or reconstructs compensation evidence after handled rollback. Because a
+hard loss before that commit can leave an unrecorded object, SQLite requires a
+complete integrity scan after a crash and is not a production recovery profile.
+New object keys are opaque and do not retain the uploaded filename. Uncertain
+or mismatched effects remain visible through Ops.
+
+Operators with `files:file:admin` can run bounded, resumable integrity scans in
+Administration. Scan batches and finding actions carry monotonic revisions;
+stale resume, recheck, or cleanup requests fail before touching object storage.
+Orphan cleanup always requires a dry-run preview followed by separate
+confirmation and records recovery-ledger evidence.
+
+Bulk rename and transfer APIs are owner-scoped: callers must provide the active
+user or group file space with `owner_type` and `owner_id`. The storage layer
+keeps a named legacy file-only helper for historical callers that lack owner
+context, and regression tests cover its write-access checks.
+
+Optional producer modules can persist generated output through the provider-
+neutral `files.artifact_store` capability. Files remains responsible for upload
+authorization, ownership, path normalization, versioning, and blob storage;
+producers receive stable file/version references without importing Files
+internals. See [Generated Artifact Store](docs/GENERATED_ARTIFACT_STORE.md).
+
 ## Release packaging
 
 The repository root includes a `package.json` for git-based WebUI installs. It exports the package `@govoplan/files-webui` from `webui/src` so release builds can depend on tagged git refs instead of local `file:` paths.

dev/connectors/.env.example

@@ -0,0 +1,25 @@
+NEXTCLOUD_HOST_PORT=9081
+NEXTCLOUD_DB_ROOT_PASSWORD=govoplan-nextcloud-root
+NEXTCLOUD_DB_PASSWORD=govoplan-nextcloud
+NEXTCLOUD_ADMIN_USER=admin
+NEXTCLOUD_ADMIN_PASSWORD=govoplan-nextcloud-admin
+
+SEAFILE_HOST_PORT=9082
+SEAFILE_MYSQL_ROOT_PASSWORD=govoplan-seafile-root
+SEAFILE_ADMIN_EMAIL=admin@example.local
+SEAFILE_ADMIN_PASSWORD=govoplan-seafile-admin
+
+WEBDAV_HOST_PORT=9083
+WEBDAV_USER=govoplan
+WEBDAV_PASSWORD=govoplan-webdav
+
+SMB_HOST_PORT=1445
+SMB_SHARE_NAME=files
+SMB_USER=govoplan
+SMB_PASSWORD=govoplan-smb
+
+MINIO_API_HOST_PORT=9000
+MINIO_CONSOLE_HOST_PORT=9001
+MINIO_ROOT_USER=govoplan
+MINIO_ROOT_PASSWORD=govoplan-minio
+MINIO_BUCKET=govoplan

dev/connectors/README.md

@@ -0,0 +1,172 @@
+# Connector Dev Stack
+
+This directory keeps local Docker Compose assets for GovOPlaN file connector
+development. The stack is intentionally separate from production deployment and
+binds services to localhost high ports.
+
+## Start
+
+```bash
+cd /mnt/DATA/git/govoplan-files/dev/connectors
+cp .env.example .env
+mkdir -p data/smb data/webdav
+docker compose up -d nextcloud nextcloud-db webdav smb minio
+docker compose up -d seafile-db seafile-memcached seafile
+```
+
+If the SMB service was already running before a compose change, recreate it so
+the image and share configuration are applied:
+
+```bash
+docker compose rm -sf smb
+docker compose up -d --build smb
+```
+
+Endpoints:
+
+- Nextcloud: `http://127.0.0.1:9081`, WebDAV root
+  `http://127.0.0.1:9081/remote.php/dav/files/admin/`
+- Seafile: `http://127.0.0.1:9082`, WebDAV root
+  `http://127.0.0.1:9082/seafdav/`
+- WebDAV: `http://127.0.0.1:9083`
+- SMB: `smb://127.0.0.1:1445/files`
+- MinIO/S3 API: `http://127.0.0.1:9000`, console
+  `http://127.0.0.1:9001`
+
+The local fixture data under `data/` is ignored by git.
+
+## GovOPlaN Profile Config
+
+Connector profiles are read from `GOVOPLAN_FILES_CONNECTOR_PROFILES_JSON` or
+`GOVOPLAN_FILES_CONNECTOR_PROFILES_FILE`. This deployment-owned configuration
+may reference environment variables only when their exact names are listed in
+`GOVOPLAN_CONNECTOR_SECRET_ENV_ALLOWLIST`; profile API responses expose only the
+credential source and configured state.
+
+Example local profile file:
+
+```json
+{
+  "profiles": [
+    {
+      "id": "dev-seafile",
+      "label": "Dev Seafile",
+      "provider": "seafile",
+      "endpoint_url": "http://127.0.0.1:9082",
+      "scope_type": "system",
+      "credential_mode": "basic",
+      "username": "admin@example.local",
+      "password_env": "SEAFILE_ADMIN_PASSWORD",
+      "capabilities": ["browse", "import"],
+      "metadata": { "webdav_endpoint_url": "http://127.0.0.1:9082/seafdav/" },
+      "policy": { "allow": { "providers": ["seafile"] } }
+    },
+    {
+      "id": "dev-nextcloud",
+      "label": "Dev Nextcloud",
+      "provider": "nextcloud",
+      "endpoint_url": "http://127.0.0.1:9081/remote.php/dav/files/admin/",
+      "scope_type": "system",
+      "credential_mode": "basic",
+      "username": "admin",
+      "password_env": "NEXTCLOUD_ADMIN_PASSWORD",
+      "capabilities": ["browse", "import"],
+      "policy": { "allow": { "providers": ["nextcloud", "webdav"] } }
+    },
+    {
+      "id": "dev-webdav",
+      "label": "Dev WebDAV",
+      "provider": "webdav",
+      "endpoint_url": "http://127.0.0.1:9083",
+      "scope_type": "system",
+      "credential_mode": "basic",
+      "username": "govoplan",
+      "password_env": "WEBDAV_PASSWORD",
+      "capabilities": ["browse", "import"],
+      "policy": { "allow": { "providers": ["webdav"] } }
+    },
+    {
+      "id": "dev-smb",
+      "label": "Dev SMB",
+      "provider": "smb",
+      "endpoint_url": "smb://127.0.0.1:1445/files",
+      "scope_type": "system",
+      "credential_mode": "basic",
+      "username": "govoplan",
+      "password_env": "SMB_PASSWORD",
+      "capabilities": ["browse", "import"],
+      "policy": { "allow": { "providers": ["smb"] } }
+    },
+    {
+      "id": "dev-s3",
+      "label": "Dev MinIO",
+      "provider": "s3",
+      "endpoint_url": "http://127.0.0.1:9000",
+      "base_path": "",
+      "scope_type": "system",
+      "credential_mode": "basic",
+      "username": "govoplan",
+      "password_env": "MINIO_ROOT_PASSWORD",
+      "capabilities": ["browse", "import"],
+      "metadata": {
+        "bucket": "govoplan",
+        "region": "us-east-1",
+        "path_style": true,
+        "verify_tls": false
+      },
+      "policy": { "allow": { "providers": ["s3"] } }
+    }
+  ]
+}
+```
+
+Start GovOPlaN with:
+
+```bash
+export GOVOPLAN_FILES_CONNECTOR_PROFILES_FILE=/mnt/DATA/git/govoplan-files/dev/connectors/profiles.local.json
+export GOVOPLAN_CONNECTOR_SECRET_ENV_ALLOWLIST=SEAFILE_ADMIN_PASSWORD,NEXTCLOUD_ADMIN_PASSWORD,WEBDAV_PASSWORD,SMB_PASSWORD,MINIO_ROOT_PASSWORD
+export GOVOPLAN_CONNECTOR_ALLOW_PRIVATE_NETWORKS=true
+```
+
+## Smoke Test
+
+Run the connector helper smoke checks from an environment where
+`govoplan-files` and `httpx` are importable:
+
+```bash
+cd /mnt/DATA/git/govoplan-files/dev/connectors
+/mnt/DATA/git/govoplan-core/.venv/bin/python smoke.py
+```
+
+The script reads `.env` from this directory when present and seeds tiny WebDAV,
+Nextcloud, SMB, and MinIO fixtures. WebDAV and Nextcloud are browsed and imported
+through the pinned connector transport. SMB and S3 product access deliberately
+fails closed until their SDK transports support peer pinning, so their fixtures
+are retained for transport development and reported as expected optional skips.
+The `--require-smb` and `--require-s3` switches are useful only while developing
+that transport support and currently make the smoke check fail by design.
+
+SMB smoke checks need the optional Python dependency in the environment running
+the script:
+
+```bash
+/mnt/DATA/git/govoplan-core/.venv/bin/python -m pip install -e /mnt/DATA/git/govoplan-files[smb]
+```
+
+S3 smoke checks need the optional boto3 dependency in the environment running
+the script:
+
+```bash
+/mnt/DATA/git/govoplan-core/.venv/bin/python -m pip install -e /mnt/DATA/git/govoplan-files[s3]
+```
+
+The SMB service is built from `dev/connectors/smb/` so the development share is
+deterministic: one `files` share backed by `data/smb`, with the credentials from
+`.env`.
+
+The SMB image runs as the non-root `govoplan` user with UID/GID `1000` and
+listens on unprivileged container port `1445`. The default host endpoint remains
+`smb://127.0.0.1:1445/files`. `SMB_USER` must stay `govoplan` unless the image is
+rebuilt with a matching user; `SMB_PORT` must be `1024` or higher. `SMB_PASSWORD`
+is applied when the image is built, so rebuild the `smb` service after changing
+it in `.env`.

dev/connectors/data/.gitignore

@@ -0,0 +1,2 @@
+*
+!.gitignore

dev/connectors/docker-compose.yml

@@ -0,0 +1,120 @@
+name: govoplan-files-connectors
+
+services:
+  nextcloud-db:
+    image: mariadb:10.11
+    command: --transaction-isolation=READ-COMMITTED --binlog-format=ROW
+    restart: unless-stopped
+    environment:
+      MYSQL_ROOT_PASSWORD: ${NEXTCLOUD_DB_ROOT_PASSWORD:-govoplan-nextcloud-root}
+      MYSQL_DATABASE: nextcloud
+      MYSQL_USER: nextcloud
+      MYSQL_PASSWORD: ${NEXTCLOUD_DB_PASSWORD:-govoplan-nextcloud}
+    volumes:
+      - nextcloud-db:/var/lib/mysql
+
+  nextcloud:
+    image: nextcloud:apache
+    restart: unless-stopped
+    depends_on:
+      - nextcloud-db
+    ports:
+      - "127.0.0.1:${NEXTCLOUD_HOST_PORT:-9081}:80"
+    environment:
+      MYSQL_HOST: nextcloud-db
+      MYSQL_DATABASE: nextcloud
+      MYSQL_USER: nextcloud
+      MYSQL_PASSWORD: ${NEXTCLOUD_DB_PASSWORD:-govoplan-nextcloud}
+      NEXTCLOUD_ADMIN_USER: ${NEXTCLOUD_ADMIN_USER:-admin}
+      NEXTCLOUD_ADMIN_PASSWORD: ${NEXTCLOUD_ADMIN_PASSWORD:-govoplan-nextcloud-admin}
+      NEXTCLOUD_TRUSTED_DOMAINS: "localhost 127.0.0.1"
+    volumes:
+      - nextcloud:/var/www/html
+
+  seafile-db:
+    image: mariadb:10.11
+    restart: unless-stopped
+    environment:
+      MYSQL_ROOT_PASSWORD: ${SEAFILE_MYSQL_ROOT_PASSWORD:-govoplan-seafile-root}
+      MARIADB_AUTO_UPGRADE: "1"
+      MYSQL_LOG_CONSOLE: "true"
+    volumes:
+      - seafile-db:/var/lib/mysql
+
+  seafile-memcached:
+    image: memcached:1.6
+    restart: unless-stopped
+    command: memcached -m 256
+
+  seafile:
+    image: seafileltd/seafile-mc:11.0-latest
+    restart: unless-stopped
+    depends_on:
+      - seafile-db
+      - seafile-memcached
+    ports:
+      - "127.0.0.1:${SEAFILE_HOST_PORT:-9082}:80"
+    environment:
+      DB_HOST: seafile-db
+      DB_ROOT_PASSWD: ${SEAFILE_MYSQL_ROOT_PASSWORD:-govoplan-seafile-root}
+      TIME_ZONE: Etc/UTC
+      SEAFILE_ADMIN_EMAIL: ${SEAFILE_ADMIN_EMAIL:-admin@example.local}
+      SEAFILE_ADMIN_PASSWORD: ${SEAFILE_ADMIN_PASSWORD:-govoplan-seafile-admin}
+      SEAFILE_SERVER_LETSENCRYPT: "false"
+      SEAFILE_SERVER_HOSTNAME: "127.0.0.1:${SEAFILE_HOST_PORT:-9082}"
+    volumes:
+      - seafile-data:/shared
+
+  webdav:
+    image: rclone/rclone:latest
+    restart: unless-stopped
+    command:
+      - serve
+      - webdav
+      - /data
+      - --addr
+      - :8080
+      - --user
+      - ${WEBDAV_USER:-govoplan}
+      - --pass
+      - ${WEBDAV_PASSWORD:-govoplan-webdav}
+    ports:
+      - "127.0.0.1:${WEBDAV_HOST_PORT:-9083}:8080"
+    volumes:
+      - ./data/webdav:/data
+
+  smb:
+    build:
+      context: ./smb
+      args:
+        SMB_PASSWORD: ${SMB_PASSWORD:-govoplan-smb}
+    image: govoplan-files-samba-dev:latest
+    restart: unless-stopped
+    environment:
+      SMB_SHARE_NAME: ${SMB_SHARE_NAME:-files}
+      SMB_USER: ${SMB_USER:-govoplan}
+      SMB_PORT: ${SMB_PORT:-1445}
+    ports:
+      - "127.0.0.1:${SMB_HOST_PORT:-1445}:${SMB_PORT:-1445}"
+    volumes:
+      - ./data/smb:/storage
+
+  minio:
+    image: minio/minio:latest
+    restart: unless-stopped
+    command: server /data --console-address ":9001"
+    environment:
+      MINIO_ROOT_USER: ${MINIO_ROOT_USER:-govoplan}
+      MINIO_ROOT_PASSWORD: ${MINIO_ROOT_PASSWORD:-govoplan-minio}
+    ports:
+      - "127.0.0.1:${MINIO_API_HOST_PORT:-9000}:9000"
+      - "127.0.0.1:${MINIO_CONSOLE_HOST_PORT:-9001}:9001"
+    volumes:
+      - minio:/data
+
+volumes:
+  nextcloud-db:
+  nextcloud:
+  seafile-db:
+  seafile-data:
+  minio:

dev/connectors/smb/Dockerfile

@@ -0,0 +1,29 @@
+FROM alpine:3.20
+
+ARG SMB_PASSWORD=govoplan-smb
+
+RUN apk add --no-cache samba-server samba-common-tools \
+  && addgroup -S -g 1000 govoplan \
+  && adduser -S -D -H -h /nonexistent -s /sbin/nologin -u 1000 -G govoplan govoplan \
+  && mkdir -p /storage /var/lib/samba/private /var/cache/samba /run/samba /etc/samba /var/log/samba/cores \
+  && printf '%s\n' \
+    '[global]' \
+    '   passdb backend = tdbsam' \
+    '   private dir = /var/lib/samba/private' \
+    '   lock directory = /run/samba' \
+    '   state directory = /var/lib/samba' \
+    '   cache directory = /var/cache/samba' \
+    '   pid directory = /run/samba' \
+    > /etc/samba/smb.conf \
+  && printf '%s\n%s\n' "$SMB_PASSWORD" "$SMB_PASSWORD" | smbpasswd -s -a govoplan \
+  && smbpasswd -e govoplan \
+  && chown -R govoplan:govoplan /storage /var/lib/samba /var/cache/samba /run/samba /etc/samba /var/log/samba
+
+COPY entrypoint.sh /usr/local/bin/govoplan-samba-entrypoint
+RUN chmod +x /usr/local/bin/govoplan-samba-entrypoint
+
+EXPOSE 1445
+
+USER govoplan:govoplan
+
+ENTRYPOINT ["/usr/local/bin/govoplan-samba-entrypoint"]

dev/connectors/smb/entrypoint.sh

@@ -0,0 +1,82 @@
+#!/bin/sh
+set -eu
+
+share_name="${SMB_SHARE_NAME:-files}"
+user_name="${SMB_USER:-govoplan}"
+smb_port="${SMB_PORT:-1445}"
+runtime_user="$(id -un)"
+runtime_group="$(id -gn)"
+
+case "$share_name" in
+  "" | *[!A-Za-z0-9_.-]*)
+    printf 'SMB_SHARE_NAME must contain only letters, numbers, dot, dash, or underscore.\n' >&2
+    exit 1
+    ;;
+esac
+
+case "$user_name" in
+  "" | *[!A-Za-z0-9_.-]*)
+    printf 'SMB_USER must contain only letters, numbers, dot, dash, or underscore.\n' >&2
+    exit 1
+    ;;
+esac
+
+case "$smb_port" in
+  "" | *[!0-9]*)
+    printf 'SMB_PORT must be numeric.\n' >&2
+    exit 1
+    ;;
+esac
+
+if [ "$smb_port" -lt 1024 ]; then
+  printf 'SMB_PORT must be >= 1024 because the dev Samba container runs as a non-root user.\n' >&2
+  exit 1
+fi
+
+if [ "$user_name" != "$runtime_user" ]; then
+  printf 'SMB_USER=%s is not supported by the non-root dev image; use %s or rebuild the image with a matching user.\n' "$user_name" "$runtime_user" >&2
+  exit 1
+fi
+
+mkdir -p /storage /var/lib/samba/private /var/cache/samba /run/samba /etc/samba
+
+cat > /etc/samba/smb.conf <<EOF
+[global]
+   server role = standalone server
+   workgroup = WORKGROUP
+   security = user
+   map to guest = Never
+   guest account = $runtime_user
+   server min protocol = SMB2
+   server signing = mandatory
+   smb ports = $smb_port
+   load printers = no
+   printing = bsd
+   disable spoolss = yes
+   log level = 1
+   passdb backend = tdbsam
+   private dir = /var/lib/samba/private
+   lock directory = /run/samba
+   state directory = /var/lib/samba
+   cache directory = /var/cache/samba
+   pid directory = /run/samba
+
+[$share_name]
+   path = /storage
+   browseable = yes
+   read only = no
+   guest ok = no
+   valid users = $user_name
+   force user = $runtime_user
+   force group = $runtime_group
+   create mask = 0664
+   directory mask = 0775
+EOF
+
+if ! pdbedit -L -u "$user_name" >/dev/null 2>&1; then
+  printf 'Samba user %s is missing from passdb. Rebuild the smb image so the non-root passdb is seeded.\n' "$user_name" >&2
+  printf 'Run: docker compose build --no-cache smb && docker compose up -d smb\n' >&2
+  exit 1
+fi
+
+exec smbd --foreground --no-process-group --debug-stdout -p "$smb_port"

dev/connectors/smoke.py

@@ -0,0 +1,282 @@
+from __future__ import annotations
+
+import argparse
+import os
+import socket
+from pathlib import Path
+
+import httpx
+
+from govoplan_files.backend.storage.connector_browse import browse_connector_profile
+from govoplan_files.backend.storage.connector_imports import read_connector_file
+from govoplan_files.backend.storage.connector_profiles import connector_profiles_from_payload
+
+
+ROOT = Path(__file__).resolve().parent
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(description="Smoke-test GovOPlaN connector helpers against the local dev compose stack.")
+    parser.add_argument("--require-smb", action="store_true", help="Fail if the SMB connector cannot browse/import.")
+    parser.add_argument("--require-s3", action="store_true", help="Fail if the S3 connector cannot browse/import.")
+    parser.add_argument("--debug-smb", action="store_true", help="Print direct smbclient probes before the connector smoke check.")
+    args = parser.parse_args()
+
+    _load_dotenv()
+    _default_env()
+    preflight_failures = _preflight_services(require_smb=args.require_smb, require_s3=args.require_s3)
+    if preflight_failures:
+        for failure in preflight_failures:
+            print(f"FAIL {failure}")
+        print("Start or recreate the connector stack from this directory with: docker compose up -d nextcloud nextcloud-db webdav smb minio")
+        return 1
+    _seed_webdav_fixture()
+    _seed_smb_fixture()
+    try:
+        _seed_nextcloud_fixture()
+    except httpx.HTTPError as exc:
+        print(f"FAIL dev-nextcloud seed failed: {exc}")
+        return 1
+    try:
+        _seed_s3_fixture()
+    except Exception as exc:
+        if args.require_s3:
+            print(f"FAIL dev-s3 seed failed: {exc}")
+            return 1
+        print(f"SKIP dev-s3 seed failed: {exc}")
+
+    profiles = {profile.id: profile for profile in connector_profiles_from_payload({"profiles": _profile_payloads()})}
+    if args.debug_smb:
+        _debug_smb(profiles["dev-smb"])
+    failures: list[str] = []
+    for profile_id, folder, file_path, expected in (
+        ("dev-webdav", "GovOPlaN", "GovOPlaN/webdav-live.txt", "webdav live fixture"),
+        ("dev-nextcloud", "GovOPlaN", "GovOPlaN/nextcloud-live.txt", "nextcloud live fixture"),
+    ):
+        try:
+            _exercise_profile(profiles[profile_id], folder=folder, file_path=file_path, expected=expected)
+        except Exception as exc:
+            failures.append(f"{profile_id}: {exc}")
+
+    try:
+        _exercise_profile(profiles["dev-smb"], folder="GovOPlaN", file_path="GovOPlaN/smb-live.txt", expected="smb live fixture")
+    except Exception as exc:
+        message = f"dev-smb: {exc}"
+        if args.require_smb:
+            failures.append(message)
+        else:
+            print(f"SKIP {message}")
+
+    try:
+        _exercise_profile(profiles["dev-s3"], folder="GovOPlaN", file_path="GovOPlaN/s3-live.txt", expected="s3 live fixture")
+    except Exception as exc:
+        message = f"dev-s3: {exc}"
+        if args.require_s3:
+            failures.append(message)
+        else:
+            print(f"SKIP {message}")
+
+    if failures:
+        for failure in failures:
+            print(f"FAIL {failure}")
+        return 1
+    print("OK connector dev stack smoke checks passed")
+    return 0
+
+
+def _default_env() -> None:
+    defaults = {
+        "NEXTCLOUD_ADMIN_USER": "admin",
+        "NEXTCLOUD_ADMIN_PASSWORD": "govoplan-nextcloud-admin",
+        "WEBDAV_USER": "govoplan",
+        "WEBDAV_PASSWORD": "govoplan-webdav",
+        "SMB_SHARE_NAME": "files",
+        "SMB_USER": "govoplan",
+        "SMB_PASSWORD": "govoplan-smb",
+        "MINIO_ROOT_USER": "govoplan",
+        "MINIO_ROOT_PASSWORD": "govoplan-minio",
+        "MINIO_BUCKET": "govoplan",
+    }
+    for key, value in defaults.items():
+        os.environ.setdefault(key, value)
+
+
+def _load_dotenv() -> None:
+    path = ROOT / ".env"
+    if not path.exists():
+        return
+    for line in path.read_text(encoding="utf-8").splitlines():
+        text = line.strip()
+        if not text or text.startswith("#") or "=" not in text:
+            continue
+        key, value = text.split("=", 1)
+        key = key.strip()
+        if not key or key in os.environ:
+            continue
+        os.environ[key] = value.strip().strip("\"'")
+
+
+def _preflight_services(*, require_smb: bool, require_s3: bool) -> list[str]:
+    failures: list[str] = []
+    nextcloud_url = f"http://127.0.0.1:{os.getenv('NEXTCLOUD_HOST_PORT', '9081')}/status.php"
+    try:
+        response = httpx.get(nextcloud_url, timeout=3.0)
+        if response.status_code != 200:
+            failures.append(f"dev-nextcloud expected HTTP 200 at {nextcloud_url}, got HTTP {response.status_code}")
+    except httpx.HTTPError as exc:
+        failures.append(f"dev-nextcloud is not reachable at {nextcloud_url}: {exc}")
+
+    webdav_url = f"http://127.0.0.1:{os.getenv('WEBDAV_HOST_PORT', '9083')}/"
+    try:
+        response = httpx.get(webdav_url, timeout=3.0)
+        if response.status_code not in {200, 401}:
+            failures.append(f"dev-webdav expected HTTP 200/401 at {webdav_url}, got HTTP {response.status_code}")
+    except httpx.HTTPError as exc:
+        failures.append(f"dev-webdav is not reachable at {webdav_url}: {exc}")
+
+    if require_smb:
+        smb_port = int(os.getenv("SMB_HOST_PORT", "1445"))
+        try:
+            with socket.create_connection(("127.0.0.1", smb_port), timeout=3.0):
+                pass
+        except OSError as exc:
+            failures.append(f"dev-smb is not reachable at 127.0.0.1:{smb_port}: {exc}")
+    if require_s3:
+        minio_url = f"http://127.0.0.1:{os.getenv('MINIO_API_HOST_PORT', '9000')}/minio/health/live"
+        try:
+            response = httpx.get(minio_url, timeout=3.0)
+            if response.status_code != 200:
+                failures.append(f"dev-s3 expected HTTP 200 at {minio_url}, got HTTP {response.status_code}")
+        except httpx.HTTPError as exc:
+            failures.append(f"dev-s3 is not reachable at {minio_url}: {exc}")
+    return failures
+
+
+def _profile_payloads() -> list[dict[str, object]]:
+    return [
+        {
+            "id": "dev-webdav",
+            "provider": "webdav",
+            "endpoint_url": f"http://127.0.0.1:{os.getenv('WEBDAV_HOST_PORT', '9083')}/",
+            "credential_mode": "basic",
+            "username": os.getenv("WEBDAV_USER", "govoplan"),
+            "password_env": "WEBDAV_PASSWORD",
+        },
+        {
+            "id": "dev-nextcloud",
+            "provider": "nextcloud",
+            "endpoint_url": f"http://127.0.0.1:{os.getenv('NEXTCLOUD_HOST_PORT', '9081')}/remote.php/dav/files/{os.getenv('NEXTCLOUD_ADMIN_USER', 'admin')}/",
+            "credential_mode": "basic",
+            "username": os.getenv("NEXTCLOUD_ADMIN_USER", "admin"),
+            "password_env": "NEXTCLOUD_ADMIN_PASSWORD",
+        },
+        {
+            "id": "dev-smb",
+            "provider": "smb",
+            "endpoint_url": f"smb://127.0.0.1:{os.getenv('SMB_HOST_PORT', '1445')}/{os.getenv('SMB_SHARE_NAME', 'files')}",
+            "credential_mode": "basic",
+            "username": os.getenv("SMB_USER", "govoplan"),
+            "password_env": "SMB_PASSWORD",
+        },
+        {
+            "id": "dev-s3",
+            "provider": "s3",
+            "endpoint_url": f"http://127.0.0.1:{os.getenv('MINIO_API_HOST_PORT', '9000')}",
+            "credential_mode": "basic",
+            "username": os.getenv("MINIO_ROOT_USER", "govoplan"),
+            "password_env": "MINIO_ROOT_PASSWORD",
+            "metadata": {
+                "bucket": os.getenv("MINIO_BUCKET", "govoplan"),
+                "region": "us-east-1",
+                "path_style": True,
+                "verify_tls": False,
+            },
+        },
+    ]
+
+
+def _exercise_profile(profile, *, folder: str, file_path: str, expected: str) -> None:
+    items = browse_connector_profile(profile, path=folder)
+    paths = {item.path for item in items}
+    if file_path not in paths:
+        raise RuntimeError(f"{file_path!r} not found; saw {sorted(paths)!r}")
+    downloaded = read_connector_file(profile, library_id="", path=file_path, max_bytes=1024 * 1024)
+    text = downloaded.data.decode("utf-8").strip()
+    if text != expected:
+        raise RuntimeError(f"{file_path!r} content mismatch: {text!r}")
+    print(f"OK {profile.id} browse/import {file_path}")
+
+
+def _debug_smb(profile) -> None:
+    try:
+        import smbclient
+    except ImportError as exc:
+        print(f"DEBUG smbclient import failed: {exc}")
+        return
+    from govoplan_files.backend.storage.connector_browse import _smb_client_kwargs, _smb_location, _smb_unc_path
+
+    location = _smb_location(profile)
+    kwargs = _smb_client_kwargs(profile, location)
+    print(f"DEBUG SMB endpoint=//{location.server}:{location.port}/{location.share} root_path={location.root_path!r}")
+    print(f"DEBUG SMB user={kwargs.get('username')!r} require_signing={kwargs.get('require_signing')!r} auth_protocol={kwargs.get('auth_protocol')!r}")
+    try:
+        smbclient.reset_connection_cache()
+    except Exception as exc:
+        print(f"DEBUG SMB reset cache failed: {exc}")
+    for path in (_smb_unc_path(location, ""), _smb_unc_path(location, "GovOPlaN")):
+        try:
+            print(f"DEBUG SMB list {path}: {smbclient.listdir(path, **kwargs)}")
+        except Exception as exc:
+            print(f"DEBUG SMB list {path} failed: {type(exc).__name__}: {exc}")
+
+
+def _seed_webdav_fixture() -> None:
+    path = ROOT / "data" / "webdav" / "GovOPlaN"
+    path.mkdir(parents=True, exist_ok=True)
+    (path / "webdav-live.txt").write_text("webdav live fixture\n", encoding="utf-8")
+
+
+def _seed_smb_fixture() -> None:
+    path = ROOT / "data" / "smb" / "GovOPlaN"
+    path.mkdir(parents=True, exist_ok=True)
+    (path / "smb-live.txt").write_text("smb live fixture\n", encoding="utf-8")
+
+
+def _seed_nextcloud_fixture() -> None:
+    base_url = f"http://127.0.0.1:{os.getenv('NEXTCLOUD_HOST_PORT', '9081')}/remote.php/dav/files/{os.getenv('NEXTCLOUD_ADMIN_USER', 'admin')}/GovOPlaN"
+    auth = (os.getenv("NEXTCLOUD_ADMIN_USER", "admin"), os.getenv("NEXTCLOUD_ADMIN_PASSWORD", "govoplan-nextcloud-admin"))
+    response = httpx.request("MKCOL", base_url, auth=auth, timeout=15.0)
+    if response.status_code not in {201, 405}:
+        raise RuntimeError(f"Nextcloud MKCOL failed with HTTP {response.status_code}: {response.text[:200]}")
+    response = httpx.put(f"{base_url}/nextcloud-live.txt", content=b"nextcloud live fixture\n", auth=auth, timeout=15.0)
+    if response.status_code not in {200, 201, 204}:
+        raise RuntimeError(f"Nextcloud PUT failed with HTTP {response.status_code}: {response.text[:200]}")
+
+
+def _seed_s3_fixture() -> None:
+    try:
+        import boto3
+        from botocore.config import Config
+        from botocore.exceptions import ClientError
+    except ImportError as exc:
+        raise RuntimeError("boto3 is not installed; install govoplan-files[s3]") from exc
+    bucket = os.getenv("MINIO_BUCKET", "govoplan")
+    client = boto3.client(
+        "s3",
+        endpoint_url=f"http://127.0.0.1:{os.getenv('MINIO_API_HOST_PORT', '9000')}",
+        aws_access_key_id=os.getenv("MINIO_ROOT_USER", "govoplan"),
+        aws_secret_access_key=os.getenv("MINIO_ROOT_PASSWORD", "govoplan-minio"),
+        region_name="us-east-1",
+        config=Config(s3={"addressing_style": "path"}),
+    )
+    try:
+        client.create_bucket(Bucket=bucket)
+    except ClientError as exc:
+        code = exc.response.get("Error", {}).get("Code")
+        if code not in {"BucketAlreadyOwnedByYou", "BucketAlreadyExists"}:
+            raise
+    client.put_object(Bucket=bucket, Key="GovOPlaN/s3-live.txt", Body=b"s3 live fixture\n", ContentType="text/plain")
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

docs/CONNECTOR_BOUNDARY.md

@@ -0,0 +1,78 @@
+# File Connector Boundary
+
+GovOPlaN Files owns the managed-file boundary: frozen blobs, versions, shares,
+campaign attachment evidence, provenance, connector policy, connector profiles,
+and read-only browse/import APIs that turn external files into managed
+GovOPlaN files.
+
+The built-in connector layer is intentionally on-demand. It does not run remote
+indexing, background sync, remote mutation, or upstream permission management.
+Connectors may browse an external source, import one selected file, freeze it as
+a managed file, record provenance, and audit the access.
+
+## Built-In Baseline
+
+The files module may keep small baseline providers when they are needed for
+normal product workflows and can share the same governance model:
+
+- Seafile through the native read/download API
+- Nextcloud through WebDAV
+- generic WebDAV
+- SMB through the optional `smb` extra
+- S3-compatible stores through the optional `s3` extra
+
+These providers are surfaced through connector descriptors at
+`GET /api/v1/files/connectors/providers`. Provider descriptors declare whether
+the provider is implemented, whether its optional dependency is installed, and
+which browse/import behaviors are available.
+
+## Separate Connector Module Candidates
+
+A separate connector module becomes appropriate when integration needs exceed
+on-demand browse/import:
+
+- background indexing or synchronization
+- bidirectional remote mutation
+- long-running transfer workers
+- provider-specific credential lifecycle or OAuth flows
+- DMS/eAkte metadata models, registers, retention, or filing plans
+- S3-compatible object store administration
+- NFS host-mount lifecycle or sidecar coordination
+- provider-specific WebUI administration beyond profile fields
+
+In that model, `govoplan-files` should keep the managed-file import contract,
+policy checks, provenance model, and audit events. A connector module should own
+provider-specific discovery, synchronization, credentials, health checks, and
+any remote write behavior.
+
+## Provider Responsibilities
+
+Every provider must:
+
+- enforce GovOPlaN profile visibility and connector policy before browse/import
+- keep credentials as encrypted values or scoped secret references, never API
+  response values; process-environment references are allowed only in
+  deployment-owned profiles with an exact deployment allowlist
+- import external files into managed storage before they are used in campaigns
+  or workflows
+- preserve source provenance and revision metadata
+- emit connector audit events for imported or accessed files
+- treat remote ACLs as upstream checks, not as a replacement for GovOPlaN policy
+- use a transport that pins every connection to a policy-validated DNS/IP answer
+  and revalidates redirects; SDK transports without that guarantee fail closed
+
+SMB initial connections, reconnects, aliases, and DFS referral targets are
+created through a Files-owned pinned `smbprotocol` transport. S3 HTTP/HTTPS pools
+use the equivalent botocore adapter for every connection selected by retries,
+redirects, endpoint discovery, and virtual-host addressing. Both adapters apply
+the deployment-wide private-network policy at socket creation. S3 keeps the
+configured hostname for TLS SNI and certificate verification, but does not use
+outbound proxies or ambient AWS credential discovery. An incompatible optional
+SDK release fails closed before a usable session or client is returned.
+
+## Non-Goals For Files
+
+Files does not own collaborative editing, comments, document review workflows,
+remote lock orchestration, DMS records management, or external system data
+models. Those belong to future document, workflow, DMS, or connector modules and
+should integrate through capabilities and managed-file imports.

docs/CONNECTOR_SPACES.md

@@ -0,0 +1,155 @@
+# Connector Spaces
+
+GovOPlaN Files should treat external file shares as two separate product
+objects:
+
+1. A governed connection profile defines a reusable remote endpoint such as a
+   WebDAV server, Nextcloud account, Seafile server, or SMB share. Profiles are
+   administered in settings at system or tenant scope, with the same
+   inheritance and limit semantics used by mail-server profiles.
+2. A governed credential profile defines reusable authentication material for
+   one provider or for any compatible provider. Credentials are administered
+   separately from connection profiles and can carry their own allow/deny
+   policy.
+3. A linked file space binds one concrete remote folder or library path from an
+   allowed profile to a user or group. Linked spaces appear beside "My files"
+   and group file spaces in the files module.
+
+This keeps secrets, endpoint governance, and tenant limits in settings, while
+keeping user/group workspaces and concrete folder choices in the files module.
+
+## Model
+
+Connection profile:
+
+- provider: `seafile`, `nextcloud`, `webdav`, `smb`, or a future provider
+- endpoint URL and optional base path
+- scope: `system` or `tenant` for administered profiles; user/group profiles
+  may be allowed later only when policy explicitly permits them
+- optional credential profile id
+- capabilities: browse, sync, import, optional write when a provider supports it
+- profile-local policy for allow/deny rules
+
+Credential profile:
+
+- provider: a specific provider or any provider
+- scope: `system` or `tenant` for administered credentials
+- credential mode: anonymous, scoped secret reference, or encrypted stored
+  password/token; environment references are reserved for deployment-owned JSON
+  profiles and exact deployment allowlisting
+- username and redacted secret configuration
+- credential-local policy for allow/deny rules
+
+Connector policy:
+
+- system policy is the baseline
+- tenant policy inherits system policy and may narrow it unless system allows
+  lower-level relaxation
+- future user/group policy may narrow tenant policy for self-service links
+- policies can allow or block providers, profile ids, endpoint URLs, external
+  path prefixes, credential ids, credential inheritance, and local linked-space
+  creation
+
+Linked connector space:
+
+- owner type: user or group
+- display name
+- connector profile id
+- remote library id or share id
+- remote root path
+- sync mode: manual initially; background sync is future work
+- read-only flag from provider/policy
+- active/deleted state
+
+The linked space is addressable as a normal file space in the Files UI. It can
+browse the remote folder, synchronize one selected file, or run a bounded manual
+folder synchronization into managed storage. Background sync jobs remain a
+separate scheduling concern.
+
+## Policy Semantics
+
+Use mail-profile terminology because administrators already see it there:
+
+- must use: lower scopes are restricted to selected profile ids or providers
+- can use: lower scopes may choose from inherited allowed profiles
+- shall not use anything outside: endpoint URLs and path prefixes are enforced
+  by deny/allow rules before browse, import, or sync
+- may create local links: controls whether users/groups can add linked spaces
+  from inherited profiles
+
+Connector policy should provide an explainable effective policy response with
+source path entries: system, tenant, user, group, campaign when applicable.
+
+## Current State
+
+Implemented:
+
+- provider descriptors for Seafile, Nextcloud, WebDAV, and SMB
+- database-backed connector profiles with system and tenant scope
+- database-backed connector credentials with system and tenant scope
+- encrypted stored password/token support for database credentials
+- JSON/environment-defined connector profiles with system, tenant, user, group,
+  and campaign visibility
+- connector allow/deny policy enforcement before browse/import/sync, including
+  provider, connection profile, credential profile, and path checks
+- read-only browse endpoints
+- import and sync into managed files with provenance and revision metadata
+- audit events for connector import, sync, and access
+- settings/admin UI sections for system and tenant file connections and
+  credentials
+- linked connector-space rows owned by users or groups
+- file-space API responses that include linked connector spaces
+- Files UI entry point to create linked connector spaces from a browsed remote
+  profile/folder
+- Files UI sync dialog for choosing a profile, browsing a remote folder, and
+  syncing a selected file into a managed destination folder
+- Files UI connector-space view with provider/read-only/manual-sync state
+- bounded folder-level manual sync with recursive traversal, pagination,
+  per-item review outcomes, source-provenance matching, and one summary audit
+  event
+- Docker dev stack smoke checks for WebDAV, Nextcloud, and SMB
+
+Missing:
+
+- explicit connector profile policy rows equivalent to mail-profile policies
+- effective connector policy/explain UI equivalent to mail-profile policies
+- edit/manage actions for existing linked connector spaces
+- optional background sync or remote-write semantics
+
+## Implementation Phases
+
+1. Persist governed connector profiles and policies.
+   - `file_connector_profiles` exists for system and tenant profiles.
+   - `file_connector_credentials` exists for system and tenant credentials.
+   - Environment JSON profiles remain bootstrap/compatibility profiles.
+   - Profile and credential CRUD endpoints exist for database-backed records.
+   - Remaining: `file_connector_policies` plus effective policy/explain output.
+
+2. Add linked connector spaces.
+   - `file_connector_spaces` exists with owner user/group, profile id, library
+     id, remote path, display label, sync mode, and active state.
+   - Connector policy is enforced before creating or using a link.
+   - Linked connector spaces are returned from `/api/v1/files/spaces`.
+
+3. Surface linked spaces in the Files UI.
+   - Linked spaces appear beside managed user/group spaces.
+   - The add-space dialog browses an allowed profile and links the current
+     remote folder/library root.
+   - The connector browser/sync flow is reused when a linked space is open.
+   - Remaining: edit/manage actions for existing linked spaces.
+
+4. Add sync orchestration.
+   - Manual selected-file and folder-level synchronization are available.
+   - Folder sync preserves remote relative paths, bounds file count and depth,
+     and reports created, updated, unchanged, skipped, conflict, policy-denied,
+     and failed items without rolling back successful siblings.
+   - The default conflict strategy is `skip`, so unrelated managed files are
+     left untouched. `rename`, `reject`, and `overwrite` remain explicit choices.
+   - Add optional scheduled/background sync separately; it must reuse the same
+     policy, provenance, result, and audit contracts.
+
+5. Add provider-specific expansion.
+   - OAuth/secret-store credentials.
+   - Remote write and delete only where policy and provider support it.
+   - DMS/eAkte metadata integrations in a separate connector or documents
+     module.

docs/DOCUMENT_COLLABORATION_BOUNDARY.md

@@ -0,0 +1,54 @@
+# Document Collaboration Boundary
+
+GovOPlaN Files is the governed managed-file module. It stores uploaded/imported
+blobs, versions, shares, provenance, ZIP imports/exports, connector imports, and
+campaign attachment evidence. It should stay reliable, auditable, and simple.
+
+Collaborative document behavior should be owned by a future documents module or
+by provider-specific connector modules when the behavior is delegated to systems
+such as Nextcloud, Seafile, Collabora, OnlyOffice, OpenDesk, or DMS/eAkte
+platforms.
+
+## Files Owns
+
+- managed blobs and immutable version evidence
+- owner-scoped user/group file spaces
+- shares and access checks for managed files
+- connector browse/import into managed storage
+- source provenance, source revision, and audit events
+- freeze-before-send campaign attachment behavior
+- previews generated from managed file versions
+
+## Documents Or Connectors Should Own
+
+- co-editing sessions and editor launch URLs
+- comments, suggestions, document tasks, and review state
+- check-in/check-out, remote locks, and lock timeouts
+- semantic document versions beyond blob versions
+- template merge flows and generated-document lifecycle
+- external DMS metadata, filing plans, record categories, and retention classes
+- provider-specific sync state and conflict resolution
+- collaborative presence and notification behavior
+
+## Integration Shape
+
+The documents layer should integrate with files through stable contracts:
+
+- create or import a managed file version for evidence points
+- attach source provenance when a file came from an external editor or DMS
+- ask files for read/download access rather than importing files internals
+- emit workflow/audit events when a collaborative document reaches a governed
+  state such as reviewed, approved, frozen, sent, or archived
+- use connector providers for provider-specific browse/import/write behavior
+
+Files may expose links to a document or connector module, but it should not own
+the collaboration state machine. A collaborative document can produce many
+working states; GovOPlaN Files should persist the governed snapshots that other
+modules can safely use as evidence.
+
+## Practical Rule
+
+If a feature is about storing, sharing, importing, downloading, or freezing a
+file, it belongs in `govoplan-files`. If a feature is about people jointly
+editing, reviewing, locking, commenting on, or routing a document through a
+semantic process, it belongs in a documents/workflow/DMS integration module.

docs/GENERATED_ARTIFACT_STORE.md

@@ -0,0 +1,23 @@
+# Generated Artifact Store
+
+Files implements Core's optional `files.artifact_store` capability for modules
+that generate deterministic output without owning file storage.
+
+The producer supplies bytes, filename, content type, destination folder,
+optional idempotency key, and bounded non-secret provenance. Files applies the
+actor's `files:file:upload` permission, tenant/user ownership, path rules,
+versioning, configured blob backend, and conflict behavior. An idempotency key
+is represented as source provenance so an unchanged retry does not create an
+unrelated file version.
+
+The shared Files session owns finalization. Before a new managed object is
+written, Files commits a lease-fenced Core recovery operation containing only
+identifiers and digests. The caller's eventual session commit independently
+verifies both `FileBlob` metadata and stored bytes; rollback compensates only an
+unreferenced key. Producers must therefore complete the supplied transaction
+normally and must not bypass or replace Files session lifecycle handling.
+
+The response contains only file/version identifiers, display path, media type,
+size, digest, and storage provenance. Producers must not put credentials,
+tokens, or rendered plaintext into metadata. Storing an artifact proves Files
+accepted it; it does not prove printing, mailing, or any other external effect.

docs/INTERFACE_PATTERN_MIGRATION.md

@@ -0,0 +1,55 @@
+# Files Interface Pattern Migration
+
+This inventory records the Files-owned part of the GovOPlaN interface pattern
+language. Core owns the shell and shared components; Files owns the composition
+and consequences described here.
+
+## Surface inventory
+
+| Surface | Primary task | Archetype | Consequence | Pattern evidence |
+| --- | --- | --- | --- | --- |
+| `/files` space and folder panes | Browse managed and connected content without losing location | Directory/explorer | Low for navigation; medium for exposing filenames and provenance | Full-height two-pane workspace, bounded panes, stable selection and contextual Help Center link |
+| `/files` toolbar and property filters | Find and act on the current selection | Explorer actions and local filtering | Medium for upload, move, copy, share and synchronization; high for delete | Actions remain beside the affected list, disabled controls explain permission/state/selection blockers, destructive work uses `ConfirmDialog` |
+| Upload/archive, transfer, rename and connector-import dialogs | Supply and review one bounded change | Adaptive create/edit or guided import | Medium to high because files, paths and external bytes change | Shared `Dialog`, `FileDropZone`, validation, conflict review, unsaved inputs and explicit confirmation |
+| File share dialog | Inspect and change access | Review/decision | High because another actor gains access | Shared dialog, access explanation, stable row actions and destructive confirmation |
+| System/tenant/group/user connector surfaces | Compare connections, credentials and effective policy | Administration/configuration | High because endpoints, secrets and inherited policy control external access | Shared `ConnectionTree`, adaptive forms, `ActionBlockerHint`, policy provenance and contextual admin help |
+| Connection and credential editors | Create or edit one governed endpoint or secret | Adaptive create/edit | High because a saved change may enable remote access | Relevant fields only, typed credential controls, discovery/test, advanced compatibility section, unsaved-change guard and disabled-save reasons |
+| Connector policy card | Narrow inherited connector access | Effective-policy editor | High because deny/allow changes affect lower scopes | Typed reference selectors, deny precedence warning, effective source evidence and permission blocker |
+| `files.widget.spaces` | See available managed/connected spaces and open Files | Dashboard widget | Low; names and provider state may still be sensitive | Shared loading/alert/status components, bounded item count, permission-filtered contribution |
+| Files chooser capability used by another module | Select a managed snapshot without importing Files internals | Directory chooser | Medium because the exact selected version becomes another module's input | Shared dialog/confirmation, capability boundary and exact file/version evidence |
+
+## State and consequence contract
+
+- Loading, errors, success, empty results, access explanations and confirmation
+  use Core components. Files does not reproduce the application shell.
+- A connector that comes from deployment settings remains visible but read-only;
+  its action explains that bootstrap configuration and a restart are required.
+- Missing permission, target, selection, endpoint, or compatible provider is an
+  explained disabled state. It is not represented only by color or absence.
+- Provider metadata JSON is an expert compatibility escape hatch inside the
+  collapsed shared advanced-options component. Ordinary connector setup uses
+  typed provider, endpoint, credential, capability and policy controls.
+- Endpoint discovery and credential tests are explicit and report their result;
+  they do not save the draft. Save remains the only committing action.
+- Connector/profile disable and managed-file delete remain confirmed actions and
+  state their immediate effect. Soft deletion must not be described as purge.
+- External connector data, paths and credential references are rendered only in
+  already-authorized administration or explorer contexts. Secret values are
+  never returned for rendering.
+
+## Accessibility and responsive evidence
+
+Shared `Dialog` owns focus entry, Escape handling and focus return. Form and
+toolbar DOM order is the keyboard order; disabled-action tooltips are themselves
+focusable and expose the reason. The connector form uses semantic sections and
+labels, status is textual as well as colored, and result alerts are announced by
+the shared alert component. The explorer collapses to one column below 1050 px;
+connector forms and action rows collapse below 760 px while preserving source
+order. Long provider choices scroll inside the segmented control rather than
+expanding the page.
+
+The focused structural test guards these contracts, optional-module boundaries,
+confirmation, contextual help, advanced-only JSON and responsive rules. Core's
+TypeScript build, structural localization audit, module-permutation suite and
+full-product bundle check provide the integration gates.
+

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@govoplan/files-webui",
-  "version": "0.1.1",
+  "version": "0.1.20",
   "private": true,
   "type": "module",
   "main": "webui/src/index.ts",
@@ -19,14 +19,14 @@
     "LICENSE"
   ],
   "peerDependencies": {
-    "@govoplan/core-webui": "^0.1.1",
-    "lucide-react": "^0.555.0",
-    "react": "^19.0.0",
-    "react-dom": "^19.0.0",
-    "react-router-dom": "^7.1.1",
-    "@vitejs/plugin-react": "^4.3.4",
+    "@vitejs/plugin-react": "^5.2.0",
+    "vite": "^7.3.6",
     "typescript": "^5.7.2",
-    "vite": "^6.0.6"
+    "react": ">=19.2.7 <20",
+    "react-dom": ">=19.2.7 <20",
+    "react-router": ">=8.3.0 <9",
+    "lucide-react": "^1.23.0",
+    "@govoplan/core-webui": "^0.1.18"
   },
   "peerDependenciesMeta": {
     "@govoplan/core-webui": {

pyproject.toml

@@ -4,14 +4,25 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "govoplan-files"
-version = "0.1.3"
+version = "0.1.20"
 description = "GovOPlaN files module with backend and WebUI integration."
 readme = "README.md"
 requires-python = ">=3.12"
 license = { file = "LICENSE" }
 authors = [{ name = "GovOPlaN" }]
 dependencies = [
-  "govoplan-core>=0.1.3",
+  "govoplan-core>=0.1.20",
+  "defusedxml>=0.7,<1",
+  "pyzipper>=0.3.6,<1",
+  "python-multipart>=0.0.31,<1",
+]
+
+[project.optional-dependencies]
+s3 = [
+  "boto3>=1.34,<2",
+]
+smb = [
+  "smbprotocol>=1.13",
 ]
 
 [tool.setuptools.packages.find]

src/govoplan_files/backend/capabilities.py

@@ -1,17 +1,68 @@
 from __future__ import annotations
 
+import base64
+import binascii
 from typing import Any
 
+from sqlalchemy import or_
+from sqlalchemy.orm import Session
+
+from govoplan_core.audit.logging import audit_from_principal
+from govoplan_core.auth import ApiPrincipal, has_scope
+from govoplan_core.core.access import AccessDecisionProvenance, PrincipalRef
+from govoplan_core.core.files import FileAccessProvider
+from govoplan_core.core.files import (
+    ManagedTabularFile,
+    ManagedTabularFileAccessError,
+    ManagedTabularFileContent,
+    ManagedTabularFileNotFoundError,
+    ManagedTabularFileProvider,
+    ManagedTabularFileUnavailableError,
+    ManagedTabularFileValidationError,
+    PostboxFileReferenceRef,
+    PostboxFileReferenceRequest,
+    PostboxFileReferenceProvider,
+    ManagedArtifactRef,
+    ManagedArtifactStore,
+    ManagedArtifactWriteRequest,
+)
 from govoplan_core.core.modules import ModuleContext
+from govoplan_core.security.module_permissions import scopes_grant_compatible
+from govoplan_files.backend.db.models import FileAsset, FileBlob, FileFolder, FileShare, FileVersion
 from govoplan_files.backend.runtime import configure_runtime
+from govoplan_files.backend.storage.common import FileStorageError
 from govoplan_files.backend.storage.campaign_attachments import (
     annotate_built_messages_with_managed_files,
     managed_match_payloads,
     prepared_campaign_snapshot,
     public_attachment_summary_payload,
+    share_assets_with_campaign,
 )
 from govoplan_files.backend.storage.campaign_usage import record_campaign_attachment_uses_for_jobs
-from govoplan_files.backend.storage.files import current_version_and_blob
+from govoplan_files.backend.storage.files import (
+    create_file_asset,
+    current_version_and_blob,
+    get_asset_for_user,
+    list_recent_assets_for_user,
+    read_asset_version_bytes,
+    sync_file_asset_from_source,
+)
+from govoplan_files.backend.storage.paths import normalize_folder
+from govoplan_files.backend.storage.share_state import effective_file_share_clause
+
+
+VIRTUAL_FOLDER_RESOURCE_PREFIX = "virtual-folder:v1"
+
+WRITE_ACTIONS = {
+    "files:file:upload",
+    "files:file:organize",
+    "files:file:share",
+    "files:file:delete",
+    "files:upload",
+    "files:organize",
+    "files:share",
+    "files:delete",
+}
 
 
 class FilesCampaignCapability:
@@ -21,6 +72,7 @@ class FilesCampaignCapability:
     annotate_built_messages_with_managed_files = staticmethod(annotate_built_messages_with_managed_files)
     record_campaign_attachment_uses_for_jobs = staticmethod(record_campaign_attachment_uses_for_jobs)
     current_version_and_blob = staticmethod(current_version_and_blob)
+    share_assets_with_campaign = staticmethod(share_assets_with_campaign)
 
     @staticmethod
     def mark_job_attachment_uses_sent(session: Any, job: Any) -> None:
@@ -30,5 +82,679 @@ class FilesCampaignCapability:
 
 
 def campaign_capability(context: ModuleContext) -> FilesCampaignCapability:
-    configure_runtime(settings=context.settings)
+    configure_runtime(registry=context.registry, settings=context.settings)
     return FilesCampaignCapability()
+
+
+class FilesArtifactStore(ManagedArtifactStore):
+    def store_artifact(
+        self,
+        session: object,
+        principal: object,
+        *,
+        request: ManagedArtifactWriteRequest,
+    ) -> ManagedArtifactRef:
+        if not hasattr(session, "query") or not hasattr(session, "flush"):
+            raise TypeError("Files artifact storage requires a SQLAlchemy session.")
+        if not hasattr(principal, "has") or not principal.has("files:file:upload"):
+            raise PermissionError("Managed artifact storage requires files:file:upload.")
+        user = getattr(principal, "user", None)
+        user_id = str(getattr(user, "id", "") or "")
+        tenant_id = str(getattr(principal, "tenant_id", "") or "")
+        if not user_id or not tenant_id:
+            raise PermissionError("Managed artifact storage requires a tenant user principal.")
+        metadata = dict(request.metadata)
+        if request.idempotency_key:
+            metadata["source_provenance"] = {
+                "source_type": "generated_artifact",
+                "connector_id": "files.artifact_store",
+                "provider": str(metadata.get("producer_module") or "platform"),
+                "external_id": request.idempotency_key,
+                "revision": str(metadata.get("output_sha256") or "") or None,
+            }
+            stored, _action, _previous_version_id = sync_file_asset_from_source(
+                session,
+                tenant_id=tenant_id,
+                owner_type="user",
+                owner_id=user_id,
+                user_id=user_id,
+                filename=request.filename,
+                data=request.payload,
+                metadata=metadata,
+                folder=request.folder,
+                content_type=request.content_type,
+                conflict_strategy="rename",
+                is_admin=principal.has("files:file:admin"),
+            )
+        else:
+            stored = create_file_asset(
+                session,
+                tenant_id=tenant_id,
+                owner_type="user",
+                owner_id=user_id,
+                user_id=user_id,
+                filename=request.filename,
+                data=request.payload,
+                folder=request.folder,
+                content_type=request.content_type,
+                description=request.description,
+                metadata=metadata,
+                conflict_strategy="rename",
+                is_admin=principal.has("files:file:admin"),
+            )
+        return ManagedArtifactRef(
+            file_asset_id=stored.asset.id,
+            file_version_id=stored.version.id,
+            filename=stored.version.filename_at_upload,
+            display_path=stored.asset.display_path,
+            content_type=stored.version.content_type or request.content_type,
+            size_bytes=stored.version.size_bytes,
+            sha256=stored.version.checksum_sha256,
+            provenance={
+                "module": "files",
+                "owner_type": stored.asset.owner_type,
+                "managed": True,
+            },
+        )
+
+
+def artifact_store_capability(context: ModuleContext) -> FilesArtifactStore:
+    configure_runtime(registry=context.registry, settings=context.settings)
+    return FilesArtifactStore()
+
+
+class FilesPostboxReferenceService(PostboxFileReferenceProvider):
+    """Resolve Postbox evidence without turning message access into file access."""
+
+    def resolve_postbox_references(
+        self,
+        session: object,
+        principal: object,
+        *,
+        tenant_id: str,
+        requests: tuple[PostboxFileReferenceRequest, ...],
+    ) -> tuple[PostboxFileReferenceRef, ...]:
+        if not hasattr(session, "get"):
+            raise TypeError("Postbox file resolution requires a SQLAlchemy session.")
+        principal_tenant = str(getattr(principal, "tenant_id", "") or "")
+        can_download = bool(
+            hasattr(principal, "has") and principal.has("files:file:download")
+        )
+        user = getattr(principal, "user", None)
+        user_id = str(getattr(user, "id", "") or "")
+        is_admin = bool(
+            hasattr(principal, "has") and principal.has("files:file:admin")
+        )
+        results: list[PostboxFileReferenceRef] = []
+        for request in requests:
+            if principal_tenant != tenant_id:
+                results.append(_unavailable_postbox_reference(request, "tenant_mismatch"))
+                continue
+            if not can_download or not user_id:
+                results.append(
+                    _unavailable_postbox_reference(
+                        request,
+                        "download_permission_missing",
+                    )
+                )
+                continue
+            reference_type = request.reference_type.strip().casefold()
+            version: FileVersion | None = None
+            if reference_type in {"file", "file_asset", "files:file"}:
+                results.append(
+                    _unavailable_postbox_reference(request, "exact_version_required")
+                )
+                continue
+            elif reference_type in {"file_version", "files:file_version"}:
+                version = session.get(FileVersion, request.reference_id)  # type: ignore[attr-defined]
+                asset = (
+                    session.get(FileAsset, version.file_asset_id)  # type: ignore[attr-defined]
+                    if version is not None
+                    else None
+                )
+            else:
+                results.append(
+                    _unavailable_postbox_reference(
+                        request,
+                        "unsupported_reference_type",
+                    )
+                )
+                continue
+            if (
+                asset is None
+                or version is None
+                or asset.tenant_id != tenant_id
+                or version.tenant_id != tenant_id
+                or asset.deleted_at is not None
+            ):
+                results.append(_unavailable_postbox_reference(request, "file_not_found"))
+                continue
+            try:
+                get_asset_for_user(
+                    session,  # type: ignore[arg-type]
+                    tenant_id=tenant_id,
+                    user_id=user_id,
+                    asset_id=asset.id,
+                    is_admin=is_admin,
+                )
+            except FileStorageError:
+                results.append(
+                    _unavailable_postbox_reference(request, "file_access_denied")
+                )
+                continue
+            blob = session.get(FileBlob, version.blob_id)  # type: ignore[attr-defined]
+            if blob is None or blob.tenant_id != tenant_id:
+                results.append(
+                    _unavailable_postbox_reference(request, "file_payload_missing")
+                )
+                continue
+            results.append(
+                PostboxFileReferenceRef(
+                    reference_type=request.reference_type,
+                    reference_id=request.reference_id,
+                    available=True,
+                    reason_code="available",
+                    file_asset_id=asset.id,
+                    file_version_id=version.id,
+                    filename=version.filename_at_upload or asset.filename,
+                    content_type=version.content_type or blob.content_type,
+                    size_bytes=version.size_bytes,
+                    sha256=version.checksum_sha256,
+                    download_path=(
+                        f"/api/v1/files/{asset.id}/versions/{version.id}/download"
+                    ),
+                    provenance={
+                        "module": "files",
+                        "postbox_id": request.postbox_id,
+                        "message_id": request.message_id,
+                        "display_path": asset.display_path,
+                        "exact_version": True,
+                    },
+                )
+            )
+        return tuple(results)
+
+
+def _unavailable_postbox_reference(
+    request: PostboxFileReferenceRequest,
+    reason_code: str,
+) -> PostboxFileReferenceRef:
+    return PostboxFileReferenceRef(
+        reference_type=request.reference_type,
+        reference_id=request.reference_id,
+        available=False,
+        reason_code=reason_code,
+    )
+
+
+def postbox_reference_capability(
+    context: ModuleContext,
+) -> FilesPostboxReferenceService:
+    configure_runtime(registry=context.registry, settings=context.settings)
+    return FilesPostboxReferenceService()
+
+
+class FilesAccessService(FileAccessProvider):
+    def explain_resource_provenance(
+        self,
+        session: object,
+        principal: PrincipalRef,
+        *,
+        resource_type: str,
+        resource_id: str,
+        action: str,
+    ) -> tuple[AccessDecisionProvenance, ...]:
+        normalized_type = resource_type.lower().strip()
+        if normalized_type in {"file", "file_asset", "files:file"}:
+            return self._explain_file(session, principal, resource_id=resource_id, action=action)
+        if normalized_type in {"folder", "file_folder", "files:folder"}:
+            return self._explain_folder(session, principal, resource_id=resource_id, action=action)
+        return ()
+
+    def _explain_file(
+        self,
+        session: object,
+        principal: PrincipalRef,
+        *,
+        resource_id: str,
+        action: str,
+    ) -> tuple[AccessDecisionProvenance, ...]:
+        asset = session.get(FileAsset, resource_id)  # type: ignore[attr-defined]
+        if asset is None or (principal.tenant_id and asset.tenant_id != principal.tenant_id):
+            return (_missing_resource("file", resource_id, principal.tenant_id, source="files.not_found"),)
+        items = [_file_resource(asset)]
+        items.extend(_owner_provenance(asset.owner_type, _owner_id(asset.owner_type, asset.owner_user_id, asset.owner_group_id), principal, source="files.owner"))
+        items.extend(_admin_provenance(principal, "files:file:admin", source="files.admin_scope"))
+        permission_values = {"write", "manage"} if _requires_write_share(action) else {"read", "write", "manage"}
+        shares = (
+            session.query(FileShare)  # type: ignore[attr-defined]
+            .filter(
+                FileShare.tenant_id == asset.tenant_id,
+                FileShare.file_asset_id == asset.id,
+                effective_file_share_clause(),
+                FileShare.permission.in_(sorted(permission_values)),
+                or_(
+                    (FileShare.target_type == "user") & (FileShare.target_id == principal.membership_id),
+                    (FileShare.target_type == "group") & (FileShare.target_id.in_(sorted(principal.group_ids))),
+                    (FileShare.target_type == "tenant") & (FileShare.target_id == asset.tenant_id),
+                ),
+            )
+            .order_by(FileShare.target_type.asc(), FileShare.target_id.asc())
+            .all()
+        )
+        for share in shares:
+            items.append(_share_provenance(share, source="files.share"))
+        return tuple(items)
+
+    def _explain_folder(
+        self,
+        session: object,
+        principal: PrincipalRef,
+        *,
+        resource_id: str,
+        action: str,
+    ) -> tuple[AccessDecisionProvenance, ...]:
+        del action
+        folder = session.get(FileFolder, resource_id)  # type: ignore[attr-defined]
+        if folder is None:
+            return self._explain_virtual_folder(session, principal, resource_id=resource_id)
+        if principal.tenant_id and folder.tenant_id != principal.tenant_id:
+            return (_missing_resource("folder", resource_id, principal.tenant_id, source="files.not_found"),)
+        return tuple([
+            AccessDecisionProvenance(
+                kind="resource",
+                id=folder.id,
+                label=folder.path,
+                tenant_id=folder.tenant_id,
+                source="files.folder",
+                details={
+                    "resource_type": "folder",
+                    "path": folder.path,
+                    "owner_type": folder.owner_type,
+                    "deleted": folder.deleted_at is not None,
+                },
+            ),
+            *_owner_provenance(folder.owner_type, _owner_id(folder.owner_type, folder.owner_user_id, folder.owner_group_id), principal, source="files.owner"),
+            *_admin_provenance(principal, "files:file:admin", source="files.admin_scope"),
+        ])
+
+    def _explain_virtual_folder(
+        self,
+        session: object,
+        principal: PrincipalRef,
+        *,
+        resource_id: str,
+    ) -> tuple[AccessDecisionProvenance, ...]:
+        folder_ref = parse_virtual_folder_resource_id(resource_id)
+        if folder_ref is None:
+            return (_missing_resource("folder", resource_id, principal.tenant_id, source="files.not_found"),)
+        tenant_id, owner_type, owner_id, path = folder_ref
+        if principal.tenant_id and tenant_id != principal.tenant_id:
+            return (_missing_resource("folder", resource_id, principal.tenant_id, source="files.not_found"),)
+        child_prefix = f"{path}/"
+        owner_filter = FileAsset.owner_user_id == owner_id if owner_type == "user" else FileAsset.owner_group_id == owner_id
+        child = (
+            session.query(FileAsset.id)  # type: ignore[attr-defined]
+            .filter(
+                FileAsset.tenant_id == tenant_id,
+                FileAsset.owner_type == owner_type,
+                owner_filter,
+                FileAsset.deleted_at.is_(None),
+                FileAsset.display_path.like(f"{child_prefix}%"),
+            )
+            .first()
+        )
+        if child is None:
+            return (_missing_resource("folder", resource_id, principal.tenant_id, source="files.not_found"),)
+        return tuple([
+            AccessDecisionProvenance(
+                kind="resource",
+                id=resource_id,
+                label=path,
+                tenant_id=tenant_id,
+                source="files.virtual_folder",
+                details={
+                    "resource_type": "folder",
+                    "path": path,
+                    "owner_type": owner_type,
+                    "owner_id": owner_id,
+                    "virtual": True,
+                    "deleted": False,
+                },
+            ),
+            *_owner_provenance(owner_type, owner_id, principal, source="files.owner"),
+            *_admin_provenance(principal, "files:file:admin", source="files.admin_scope"),
+        ])
+
+
+def access_capability(context: ModuleContext) -> FilesAccessService:
+    configure_runtime(registry=context.registry, settings=context.settings)
+    return FilesAccessService()
+
+
+class FilesManagedTabularFileService(ManagedTabularFileProvider):
+    """Expose authorized immutable CSV/XLSX versions to optional consumers."""
+
+    def list_tabular_files(
+        self,
+        session: object,
+        principal: object,
+        *,
+        query: str = "",
+        limit: int = 100,
+    ) -> tuple[ManagedTabularFile, ...]:
+        db, api_principal, user_id = _tabular_context(
+            session,
+            principal,
+            required_scope="files:file:read",
+        )
+        normalized_query = str(query or "").strip().casefold()
+        requested_limit = max(1, min(int(limit), 100))
+        assets = list_recent_assets_for_user(
+            db,
+            tenant_id=api_principal.tenant_id,
+            user_id=user_id,
+            limit=min(500, requested_limit * 5),
+            is_admin=has_scope(api_principal, "files:file:admin"),
+        )
+        results: list[ManagedTabularFile] = []
+        for asset in assets:
+            if normalized_query and normalized_query not in (
+                f"{asset.filename} {asset.display_path} {asset.description or ''}"
+            ).casefold():
+                continue
+            try:
+                version, blob = current_version_and_blob(db, asset)
+            except FileStorageError:
+                continue
+            if not _is_tabular_file(version.filename_at_upload, version.content_type):
+                continue
+            results.append(_managed_tabular_file(asset, version, blob))
+            if len(results) >= requested_limit:
+                break
+        return tuple(results)
+
+    def get_tabular_file(
+        self,
+        session: object,
+        principal: object,
+        *,
+        file_asset_id: str,
+        file_version_id: str | None = None,
+    ) -> ManagedTabularFile | None:
+        db, api_principal, user_id = _tabular_context(
+            session,
+            principal,
+            required_scope="files:file:read",
+        )
+        try:
+            asset = get_asset_for_user(
+                db,
+                tenant_id=api_principal.tenant_id,
+                user_id=user_id,
+                asset_id=file_asset_id,
+                is_admin=has_scope(api_principal, "files:file:admin"),
+            )
+        except FileStorageError:
+            return None
+        if file_version_id:
+            version = db.get(FileVersion, file_version_id)
+            if (
+                version is None
+                or version.file_asset_id != asset.id
+                or version.tenant_id != api_principal.tenant_id
+            ):
+                return None
+            blob = db.get(FileBlob, version.blob_id)
+            if blob is None or blob.tenant_id != api_principal.tenant_id:
+                return None
+        else:
+            try:
+                version, blob = current_version_and_blob(db, asset)
+            except FileStorageError as exc:
+                raise ManagedTabularFileUnavailableError(
+                    "Managed file version metadata is unavailable."
+                ) from exc
+        if not _is_tabular_file(version.filename_at_upload, version.content_type):
+            return None
+        return _managed_tabular_file(asset, version, blob)
+
+    def read_tabular_file(
+        self,
+        session: object,
+        principal: object,
+        *,
+        file_asset_id: str,
+        file_version_id: str,
+        max_bytes: int,
+    ) -> ManagedTabularFileContent:
+        db, api_principal, user_id = _tabular_context(
+            session,
+            principal,
+            required_scope="files:file:download",
+        )
+        try:
+            asset = get_asset_for_user(
+                db,
+                tenant_id=api_principal.tenant_id,
+                user_id=user_id,
+                asset_id=file_asset_id,
+                is_admin=has_scope(api_principal, "files:file:admin"),
+            )
+        except FileStorageError as exc:
+            raise ManagedTabularFileNotFoundError(
+                "Managed tabular file not found."
+            ) from exc
+        metadata = self.get_tabular_file(
+            db,
+            api_principal,
+            file_asset_id=asset.id,
+            file_version_id=file_version_id,
+        )
+        if metadata is None:
+            raise ManagedTabularFileNotFoundError(
+                "Managed tabular file version not found."
+            )
+        effective_max = max(1, int(max_bytes))
+        if metadata.size_bytes > effective_max:
+            raise ManagedTabularFileValidationError(
+                f"Managed tabular files are limited to {effective_max:,} bytes for this operation."
+            )
+        try:
+            payload, version, blob = read_asset_version_bytes(
+                db,
+                asset,
+                file_version_id,
+            )
+        except FileStorageError as exc:
+            raise ManagedTabularFileUnavailableError(
+                "Managed tabular file content is unavailable or failed integrity verification."
+            ) from exc
+        if len(payload) > effective_max:
+            raise ManagedTabularFileValidationError(
+                f"Managed tabular files are limited to {effective_max:,} bytes for this operation."
+            )
+        result = _managed_tabular_file(asset, version, blob)
+        audit_from_principal(
+            db,
+            api_principal,
+            action="files.tabular_content.read",
+            object_type="file_version",
+            object_id=version.id,
+            details={
+                "file_asset_id": asset.id,
+                "size_bytes": version.size_bytes,
+                "checksum_sha256": version.checksum_sha256,
+                "consumer": "tabular_content",
+            },
+        )
+        return ManagedTabularFileContent(file=result, payload=payload)
+
+
+def managed_tabular_file_capability(
+    context: ModuleContext,
+) -> FilesManagedTabularFileService:
+    configure_runtime(registry=context.registry, settings=context.settings)
+    return FilesManagedTabularFileService()
+
+
+def _tabular_context(
+    session: object,
+    principal: object,
+    *,
+    required_scope: str,
+) -> tuple[Session, ApiPrincipal, str]:
+    if not isinstance(session, Session):
+        raise TypeError("Managed tabular file access requires a SQLAlchemy session.")
+    if not isinstance(principal, ApiPrincipal):
+        raise ManagedTabularFileAccessError(
+            "Managed tabular file access requires a tenant API principal."
+        )
+    if not (
+        has_scope(principal, required_scope)
+        or has_scope(principal, "files:file:admin")
+    ):
+        raise ManagedTabularFileAccessError(
+            f"Managed tabular file access requires {required_scope}."
+        )
+    user_id = str(getattr(principal.user, "id", "") or "").strip()
+    if not principal.tenant_id or not user_id:
+        raise ManagedTabularFileAccessError(
+            "Managed tabular file access requires a tenant user principal."
+        )
+    return session, principal, user_id
+
+
+def _managed_tabular_file(
+    asset: FileAsset,
+    version: FileVersion,
+    blob: FileBlob,
+) -> ManagedTabularFile:
+    return ManagedTabularFile(
+        file_asset_id=asset.id,
+        file_version_id=version.id,
+        filename=version.filename_at_upload or asset.filename,
+        display_path=version.display_path_at_upload or asset.display_path,
+        content_type=version.content_type or blob.content_type,
+        size_bytes=version.size_bytes,
+        sha256=version.checksum_sha256,
+        updated_at=version.created_at,
+        current_version=asset.current_version_id == version.id,
+    )
+
+
+def _is_tabular_file(filename: str, content_type: str | None) -> bool:
+    normalized_name = str(filename or "").strip().casefold()
+    normalized_type = str(content_type or "").split(";", 1)[0].strip().casefold()
+    return normalized_name.endswith((".csv", ".xlsx")) or normalized_type in {
+        "text/csv",
+        "application/csv",
+        "application/vnd.ms-excel",
+        "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+    }
+
+
+def virtual_folder_resource_id(*, tenant_id: str, owner_type: str, owner_id: str, path: str) -> str:
+    normalized_path = normalize_folder(path)
+    encoded_path = base64.urlsafe_b64encode(normalized_path.encode("utf-8")).decode("ascii").rstrip("=")
+    return f"{VIRTUAL_FOLDER_RESOURCE_PREFIX}:{tenant_id}:{owner_type}:{owner_id}:{encoded_path}"
+
+
+def parse_virtual_folder_resource_id(resource_id: str) -> tuple[str, str, str, str] | None:
+    parts = resource_id.split(":", 5)
+    if len(parts) != 6 or f"{parts[0]}:{parts[1]}" != VIRTUAL_FOLDER_RESOURCE_PREFIX:
+        return None
+    _, _, tenant_id, owner_type, owner_id, encoded_path = parts
+    if owner_type not in {"user", "group"} or not tenant_id or not owner_id or not encoded_path:
+        return None
+    padding = "=" * (-len(encoded_path) % 4)
+    try:
+        decoded_path = base64.urlsafe_b64decode(f"{encoded_path}{padding}").decode("utf-8")
+        path = normalize_folder(decoded_path)
+    except (binascii.Error, UnicodeDecodeError, ValueError):
+        return None
+    if not path:
+        return None
+    return tenant_id, owner_type, owner_id, path
+
+
+def _file_resource(asset: FileAsset) -> AccessDecisionProvenance:
+    return AccessDecisionProvenance(
+        kind="resource",
+        id=asset.id,
+        label=asset.filename,
+        tenant_id=asset.tenant_id,
+        source="files.file",
+        details={
+            "resource_type": "file",
+            "display_path": asset.display_path,
+            "owner_type": asset.owner_type,
+            "deleted": asset.deleted_at is not None,
+        },
+    )
+
+
+def _missing_resource(resource_type: str, resource_id: str, tenant_id: str | None, *, source: str) -> AccessDecisionProvenance:
+    return AccessDecisionProvenance(
+        kind="resource",
+        id=resource_id,
+        tenant_id=tenant_id,
+        source=source,
+        details={"resource_type": resource_type, "found": False},
+    )
+
+
+def _owner_id(owner_type: str, owner_user_id: str | None, owner_group_id: str | None) -> str | None:
+    return owner_user_id if owner_type == "user" else owner_group_id
+
+
+def _owner_provenance(owner_type: str, owner_id: str | None, principal: PrincipalRef, *, source: str) -> tuple[AccessDecisionProvenance, ...]:
+    if owner_id is None:
+        return ()
+    matches_user = owner_type == "user" and owner_id == principal.membership_id
+    matches_group = owner_type == "group" and owner_id in principal.group_ids
+    if not (matches_user or matches_group):
+        return ()
+    return (
+        AccessDecisionProvenance(
+            kind="owner",
+            id=owner_id,
+            tenant_id=principal.tenant_id,
+            source=source,
+            details={"owner_type": owner_type},
+        ),
+    )
+
+
+def _admin_provenance(principal: PrincipalRef, required_scope: str, *, source: str) -> tuple[AccessDecisionProvenance, ...]:
+    if not scopes_grant_compatible(principal.scopes, required_scope):
+        return ()
+    return (
+        AccessDecisionProvenance(
+            kind="policy",
+            id=required_scope,
+            label=required_scope,
+            tenant_id=principal.tenant_id,
+            source=source,
+            details={"grant": "tenant_admin"},
+        ),
+    )
+
+
+def _share_provenance(share: FileShare, *, source: str) -> AccessDecisionProvenance:
+    return AccessDecisionProvenance(
+        kind="share",
+        id=share.id,
+        label=share.permission,
+        tenant_id=share.tenant_id,
+        source=source,
+        details={
+            "target_type": share.target_type,
+            "target_id": share.target_id,
+            "permission": share.permission,
+        },
+    )
+
+
+def _requires_write_share(action: str) -> bool:
+    return action in WRITE_ACTIONS

src/govoplan_files/backend/change_tracking.py

@@ -0,0 +1,186 @@
+from __future__ import annotations
+
+from datetime import datetime
+
+from sqlalchemy import event
+from sqlalchemy.orm import Session as OrmSession
+
+from govoplan_core.core.change_sequence import record_change
+from govoplan_core.core.sqlalchemy_change_tracking import (
+    ensure_object_id,
+    has_attr_changes,
+    object_state,
+    operation_for_soft_deletable,
+    previous_value,
+)
+from govoplan_files.backend.db.models import FileAsset, FileFolder, FileShare, new_uuid
+
+FILES_MODULE_ID = "files"
+FILES_ASSETS_COLLECTION = "files.assets"
+FILES_FOLDERS_COLLECTION = "files.folders"
+FILES_CONNECTOR_PROFILES_COLLECTION = "files.connector_profiles"
+FILES_CONNECTOR_CREDENTIALS_COLLECTION = "files.connector_credentials"
+FILES_CONNECTOR_POLICIES_COLLECTION = "files.connector_policies"
+FILES_CONNECTOR_SPACES_COLLECTION = "files.connector_spaces"
+
+_REGISTERED = False
+
+
+def register_files_change_tracking() -> None:
+    global _REGISTERED
+    if _REGISTERED:
+        return
+    event.listen(OrmSession, "before_flush", _record_files_changes)
+    _REGISTERED = True
+
+
+def _record_files_changes(session: OrmSession, _flush_context: object, _instances: object) -> None:
+    for obj in tuple(session.new) + tuple(session.dirty):
+        if isinstance(obj, FileAsset):
+            _record_asset_change(session, obj)
+        elif isinstance(obj, FileFolder):
+            _record_folder_change(session, obj)
+        elif isinstance(obj, FileShare):
+            _record_share_visibility_change(session, obj)
+
+
+def _record_asset_change(session: OrmSession, asset: FileAsset) -> None:
+    operation = operation_for_soft_deletable(
+        asset,
+        changed_attrs=(
+            "owner_type",
+            "owner_user_id",
+            "owner_group_id",
+            "current_version_id",
+            "display_path",
+            "filename",
+            "description",
+            "deleted_at",
+            "retained_until",
+            "legal_hold",
+            "lifecycle_revision",
+            "lifecycle_reason",
+            "metadata_",
+        ),
+    )
+    if operation is None:
+        return
+    resource_id = _ensure_id(asset)
+    record_change(
+        session,
+        module_id=FILES_MODULE_ID,
+        collection=FILES_ASSETS_COLLECTION,
+        resource_type="file",
+        resource_id=resource_id,
+        operation=operation,
+        tenant_id=asset.tenant_id,
+        actor_type="user" if asset.created_by_user_id else None,
+        actor_id=asset.created_by_user_id,
+        payload={
+            "owner_type": asset.owner_type,
+            "owner_id": _owner_id(asset.owner_type, asset.owner_user_id, asset.owner_group_id),
+            "path": asset.display_path,
+            "previous_path": previous_value(asset, "display_path"),
+            "filename": asset.filename,
+            "deleted_at": _isoformat(asset.deleted_at),
+            "retained_until": _isoformat(asset.retained_until),
+            "legal_hold": asset.legal_hold,
+            "lifecycle_revision": asset.lifecycle_revision,
+        },
+    )
+
+
+def _record_folder_change(session: OrmSession, folder: FileFolder) -> None:
+    operation = operation_for_soft_deletable(
+        folder,
+        changed_attrs=("owner_type", "owner_user_id", "owner_group_id", "path", "deleted_at", "metadata_"),
+    )
+    if operation is None:
+        return
+    resource_id = _ensure_id(folder)
+    record_change(
+        session,
+        module_id=FILES_MODULE_ID,
+        collection=FILES_FOLDERS_COLLECTION,
+        resource_type="folder",
+        resource_id=resource_id,
+        operation=operation,
+        tenant_id=folder.tenant_id,
+        actor_type="user" if folder.created_by_user_id else None,
+        actor_id=folder.created_by_user_id,
+        payload={
+            "owner_type": folder.owner_type,
+            "owner_id": _owner_id(folder.owner_type, folder.owner_user_id, folder.owner_group_id),
+            "path": folder.path,
+            "previous_path": previous_value(folder, "path"),
+            "deleted_at": _isoformat(folder.deleted_at),
+        },
+    )
+
+
+def _record_share_visibility_change(session: OrmSession, share: FileShare) -> None:
+    state = object_state(share)
+    if not share.file_asset_id:
+        return
+    if not state.pending and not has_attr_changes(
+        state,
+        (
+            "file_asset_id",
+            "target_type",
+            "target_id",
+            "permission",
+            "expires_at",
+            "revoked_at",
+            "revoked_by_user_id",
+        ),
+    ):
+        return
+    _ensure_id(share)
+    record_change(
+        session,
+        module_id=FILES_MODULE_ID,
+        collection=FILES_ASSETS_COLLECTION,
+        resource_type="file",
+        resource_id=share.file_asset_id,
+        operation="updated",
+        tenant_id=share.tenant_id,
+        actor_type="user" if share.created_by_user_id else None,
+        actor_id=share.created_by_user_id,
+        payload={
+            "share_id": share.id,
+            "share_target_type": share.target_type,
+            "share_target_id": share.target_id,
+            "share_permission": share.permission,
+            "share_expires_at": _isoformat(share.expires_at),
+            "share_revoked_at": _isoformat(share.revoked_at),
+            "share_revoked_by_user_id": share.revoked_by_user_id,
+        },
+    )
+
+
+def _ensure_id(obj: object) -> str:
+    return ensure_object_id(obj, new_uuid)
+
+
+def _owner_id(owner_type: str, owner_user_id: str | None, owner_group_id: str | None) -> str | None:
+    if owner_type == "user":
+        return owner_user_id
+    if owner_type == "group":
+        return owner_group_id
+    return None
+
+
+def _isoformat(value: datetime | None) -> str | None:
+    return value.isoformat() if value else None
+
+
+__all__ = [
+    "FILES_ASSETS_COLLECTION",
+    "FILES_CONNECTOR_CREDENTIALS_COLLECTION",
+    "FILES_CONNECTOR_POLICIES_COLLECTION",
+    "FILES_CONNECTOR_PROFILES_COLLECTION",
+    "FILES_CONNECTOR_SPACES_COLLECTION",
+    "FILES_FOLDERS_COLLECTION",
+    "FILES_MODULE_ID",
+    "register_files_change_tracking",
+]

src/govoplan_files/backend/configuration_provider.py

@@ -0,0 +1,600 @@
+from __future__ import annotations
+
+from collections.abc import Mapping
+import os
+from pathlib import Path
+from typing import Any
+from urllib.parse import urlsplit
+
+from govoplan_core.core.configuration_packages import (
+    ConfigurationApplyResult,
+    ConfigurationDiagnostic,
+    ConfigurationExportResult,
+    ConfigurationExportSelection,
+    ConfigurationPackageFragment,
+    ConfigurationPlanItem,
+    ConfigurationPreflightContext,
+    ConfigurationPreflightResult,
+    ConfigurationProvider,
+    ConfigurationProviderDescription,
+)
+from govoplan_core.core.infrastructure_capabilities import (
+    InfrastructureCapability,
+    InfrastructureCapabilityReceipt,
+)
+from govoplan_files.backend.runtime import settings as runtime_settings
+
+
+FILES_CONFIGURATION_CAPABILITY = "files.configuration"
+MANAGED_STORAGE_FRAGMENT = "managed_storage"
+_PAYLOAD_KEYS = frozenset(
+    {"capability_id", "expected_backend", "expected_source"}
+)
+
+
+class FilesConfigurationProvider(ConfigurationProvider):
+    module_id = "files"
+
+    def __init__(
+        self,
+        *,
+        settings: object | None = None,
+        environment: Mapping[str, str] | None = None,
+    ) -> None:
+        self._settings = runtime_settings if settings is None else settings
+        self._environment = os.environ if environment is None else environment
+
+    def describe(self) -> ConfigurationProviderDescription:
+        return ConfigurationProviderDescription(
+            module_id=self.module_id,
+            fragment_types=(MANAGED_STORAGE_FRAGMENT,),
+            schema_refs={
+                MANAGED_STORAGE_FRAGMENT: "govoplan/files/configuration/managed-storage.v1"
+            },
+            exported_scopes=("system",),
+        )
+
+    def preflight(
+        self,
+        fragment: ConfigurationPackageFragment,
+        context: ConfigurationPreflightContext,
+    ) -> ConfigurationPreflightResult:
+        if fragment.fragment_type != MANAGED_STORAGE_FRAGMENT:
+            return ConfigurationPreflightResult(
+                diagnostics=(_unsupported(fragment),),
+                plan=(_blocked_plan(fragment, "Fragment type is unsupported."),),
+            )
+        diagnostics, binding_ref = self._binding_diagnostics(fragment, context)
+        blocked = any(item.severity == "blocker" for item in diagnostics)
+        return ConfigurationPreflightResult(
+            diagnostics=tuple(diagnostics),
+            plan=(
+                ConfigurationPlanItem(
+                    action="blocked" if blocked else "skip",
+                    module_id="files",
+                    fragment_type=MANAGED_STORAGE_FRAGMENT,
+                    fragment_id=fragment.fragment_id or binding_ref,
+                    summary=(
+                        "Managed storage does not match the deployment receipt."
+                        if blocked
+                        else "Deployment-owned managed storage already matches the receipt; no module state is rewritten."
+                    ),
+                ),
+            ),
+        )
+
+    def apply(
+        self,
+        fragment: ConfigurationPackageFragment,
+        supplied_data: Mapping[str, Any],
+        context: ConfigurationPreflightContext,
+    ) -> ConfigurationApplyResult:
+        del supplied_data
+        if fragment.fragment_type != MANAGED_STORAGE_FRAGMENT:
+            return ConfigurationApplyResult(diagnostics=(_unsupported(fragment),))
+        diagnostics, _binding_ref = self._binding_diagnostics(fragment, context)
+        return ConfigurationApplyResult(
+            diagnostics=tuple(
+                item for item in diagnostics if item.severity == "blocker"
+            )
+        )
+
+    def export(
+        self,
+        selection: ConfigurationExportSelection,
+        context: ConfigurationPreflightContext,
+    ) -> ConfigurationExportResult:
+        del selection
+        receipt = context.infrastructure_receipt
+        if context.infrastructure_receipt_error:
+            return ConfigurationExportResult(
+                diagnostics=(
+                    _receipt_error(
+                        context.infrastructure_receipt_error,
+                        object_ref="files.storage",
+                    ),
+                )
+            )
+        if receipt is None:
+            return ConfigurationExportResult(
+                diagnostics=(
+                    ConfigurationDiagnostic(
+                        severity="blocker",
+                        code="infrastructure_receipt_missing",
+                        message="Files managed-storage export requires the deployment capability receipt.",
+                        module_id="files",
+                        object_ref="files.storage",
+                        resolution="Mount the installer-generated receipt before exporting deployment configuration.",
+                    ),
+                )
+            )
+        capability = receipt.capability("files.storage")
+        if capability is None:
+            return ConfigurationExportResult(
+                diagnostics=(
+                    ConfigurationDiagnostic(
+                        severity="blocker",
+                        code="infrastructure_capability_missing",
+                        message="The deployment receipt does not declare managed file storage.",
+                        module_id="files",
+                        object_ref="files.storage",
+                    ),
+                )
+            )
+        return ConfigurationExportResult(
+            fragments=(
+                ConfigurationPackageFragment(
+                    module_id="files",
+                    fragment_type=MANAGED_STORAGE_FRAGMENT,
+                    fragment_id=f"{receipt.installation_id}:files.storage",
+                    payload={
+                        "capability_id": "files.storage",
+                        "expected_backend": _expected_backend(capability.source),
+                        "expected_source": capability.source,
+                    },
+                ),
+            )
+        )
+
+    def health(
+        self,
+        import_result: ConfigurationApplyResult,
+        context: ConfigurationPreflightContext,
+    ) -> tuple[ConfigurationDiagnostic, ...]:
+        del context
+        return tuple(
+            item for item in import_result.diagnostics if item.severity == "blocker"
+        )
+
+    def _binding_diagnostics(
+        self,
+        fragment: ConfigurationPackageFragment,
+        context: ConfigurationPreflightContext,
+    ) -> tuple[list[ConfigurationDiagnostic], str]:
+        diagnostics: list[ConfigurationDiagnostic] = []
+        payload = _files_fragment_payload(fragment, diagnostics)
+        if payload is None:
+            return diagnostics, fragment.fragment_id or "files.storage"
+        receipt_state = _files_receipt_capability(
+            fragment,
+            context,
+            payload,
+            diagnostics,
+        )
+        if receipt_state is None:
+            return diagnostics, fragment.fragment_id or "files.storage"
+        _receipt, capability, binding_ref = receipt_state
+        expected_backend = _expected_backend(capability.source)
+        diagnostics.extend(
+            _package_expectation_diagnostics(
+                payload,
+                capability,
+                expected_backend,
+                binding_ref,
+            )
+        )
+        active_backend = _normalized_backend(
+            getattr(self._settings, "file_storage_backend", "local")
+        )
+        if active_backend != expected_backend:
+            diagnostics.append(
+                ConfigurationDiagnostic(
+                    severity="blocker",
+                    code="files_storage_runtime_mismatch",
+                    message=(
+                        f"Files runtime uses {active_backend!r}, while the deployment receipt declares {expected_backend!r}."
+                    ),
+                    module_id="files",
+                    object_ref=binding_ref,
+                    resolution="Reconcile deployment environment and receipt before starting or importing Files configuration.",
+                )
+            )
+            return diagnostics, binding_ref
+        diagnostics.extend(
+            self._runtime_storage_diagnostics(
+                expected_backend,
+                capability,
+                binding_ref,
+            )
+        )
+        if "files" not in capability.dependent_modules:
+            diagnostics.append(
+                ConfigurationDiagnostic(
+                    severity="info",
+                    code="infrastructure_consumer_not_declared",
+                    message="Files is active but was not selected as a receipt consumer when the deployment plan was generated.",
+                    module_id="files",
+                    object_ref=binding_ref,
+                    resolution="Regenerate the deployment plan so removal-impact inventory includes Files.",
+                )
+            )
+        return diagnostics, binding_ref
+
+    def _runtime_storage_diagnostics(
+        self,
+        expected_backend: str,
+        capability: InfrastructureCapability,
+        binding_ref: str,
+    ) -> list[ConfigurationDiagnostic]:
+        if expected_backend == "s3":
+            return self._s3_diagnostics(
+                capability.endpoint,
+                capability.secret_refs,
+                capability.source,
+                binding_ref,
+            )
+        root = Path(
+            str(getattr(self._settings, "file_storage_local_root", "") or "")
+        )
+        if root.is_absolute():
+            return []
+        return [
+            ConfigurationDiagnostic(
+                severity="blocker",
+                code="files_storage_local_root_not_durable",
+                message="Receipt-bound local file storage requires an absolute deployment-managed path.",
+                module_id="files",
+                object_ref=binding_ref,
+                resolution="Set FILE_STORAGE_LOCAL_ROOT to the mounted persistent-volume path.",
+            )
+        ]
+
+    def _s3_diagnostics(
+        self,
+        endpoint: Mapping[str, object],
+        secret_refs: tuple[str, ...],
+        source: str,
+        object_ref: str,
+    ) -> list[ConfigurationDiagnostic]:
+        diagnostics: list[ConfigurationDiagnostic] = []
+        endpoint_url = str(
+            getattr(self._settings, "file_storage_s3_endpoint_url", "")
+            or getattr(self._settings, "s3_endpoint_url", "")
+            or ""
+        ).strip()
+        runtime_endpoint = _redacted_endpoint(
+            endpoint_url,
+            default_port=int(endpoint.get("port") or 443),
+        )
+        receipt_endpoint = {
+            key: endpoint.get(key) for key in ("scheme", "host", "port") if endpoint.get(key) is not None
+        }
+        if receipt_endpoint and runtime_endpoint != receipt_endpoint:
+            diagnostics.append(
+                ConfigurationDiagnostic(
+                    severity="blocker",
+                    code="files_storage_endpoint_mismatch",
+                    message="Files S3 endpoint does not match the sanitized deployment receipt endpoint.",
+                    module_id="files",
+                    object_ref=object_ref,
+                    resolution="Reconcile FILE_STORAGE_S3_ENDPOINT_URL and the deployment plan before apply.",
+                )
+            )
+        bucket = str(
+            getattr(self._settings, "file_storage_s3_bucket", "")
+            or getattr(self._settings, "s3_bucket", "")
+            or ""
+        ).strip()
+        if not bucket:
+            diagnostics.append(
+                ConfigurationDiagnostic(
+                    severity="blocker",
+                    code="files_storage_bucket_missing",
+                    message="Files S3 storage has no configured bucket.",
+                    module_id="files",
+                    object_ref=object_ref,
+                    resolution="Set FILE_STORAGE_S3_BUCKET in the deployment environment.",
+                )
+            )
+        for reference in secret_refs:
+            variable = reference.removeprefix("env:")
+            if not variable.startswith("FILE_STORAGE_"):
+                continue
+            if not str(self._environment.get(variable, "")).strip():
+                diagnostics.append(
+                    ConfigurationDiagnostic(
+                        severity="blocker",
+                        code="files_storage_secret_reference_unresolved",
+                        message=f"Required storage secret reference {reference} is not available to the runtime.",
+                        module_id="files",
+                        object_ref=object_ref,
+                        resolution="Provide the referenced environment secret without copying its value into the package.",
+                    )
+                )
+        deployment_managed = bool(
+            getattr(
+                self._settings,
+                "file_storage_s3_deployment_managed",
+                False,
+            )
+        )
+        endpoint_trusted = bool(
+            getattr(self._settings, "file_storage_s3_endpoint_trusted", False)
+        )
+        if source == "installer-managed-garage" and not deployment_managed:
+            diagnostics.append(
+                ConfigurationDiagnostic(
+                    severity="blocker",
+                    code="files_storage_management_boundary_mismatch",
+                    message="Garage is installer-managed in the receipt but not marked deployment-managed in Files runtime.",
+                    module_id="files",
+                    object_ref=object_ref,
+                    resolution="Set FILE_STORAGE_S3_DEPLOYMENT_MANAGED=true for the installer-managed Garage endpoint.",
+                )
+            )
+        if source == "operator-supplied-s3" and not endpoint_trusted:
+            diagnostics.append(
+                ConfigurationDiagnostic(
+                    severity="blocker",
+                    code="files_storage_trust_boundary_missing",
+                    message="External S3 storage must be explicitly marked as a trusted deployment endpoint.",
+                    module_id="files",
+                    object_ref=object_ref,
+                    resolution="Review the endpoint and set FILE_STORAGE_S3_ENDPOINT_TRUSTED=true in deployment configuration.",
+                )
+            )
+        return diagnostics
+
+
+def _files_fragment_payload(
+    fragment: ConfigurationPackageFragment,
+    diagnostics: list[ConfigurationDiagnostic],
+) -> Mapping[str, Any] | None:
+    payload = fragment.payload
+    if not isinstance(payload, Mapping):
+        diagnostics.append(
+            _invalid(fragment, "Managed-storage payload must be an object.")
+        )
+        return None
+    unknown = sorted(set(payload) - _PAYLOAD_KEYS)
+    if not unknown:
+        return payload
+    secret_like = any(
+        marker in key.casefold()
+        for key in unknown
+        for marker in ("password", "secret", "token", "credential", "access_key")
+    )
+    diagnostics.append(
+        ConfigurationDiagnostic(
+            severity="blocker",
+            code=(
+                "files_configuration_secret_forbidden"
+                if secret_like
+                else "files_configuration_payload_invalid"
+            ),
+            message=(
+                "Managed-storage fragments accept receipt references and non-secret expectations only."
+                if secret_like
+                else f"Managed-storage payload contains unsupported fields: {', '.join(unknown)}."
+            ),
+            module_id="files",
+            object_ref=fragment.fragment_id or MANAGED_STORAGE_FRAGMENT,
+            resolution="Keep storage credentials in deployment environment references, never in a configuration package.",
+        )
+    )
+    return payload
+
+
+def _files_receipt_capability(
+    fragment: ConfigurationPackageFragment,
+    context: ConfigurationPreflightContext,
+    payload: Mapping[str, Any],
+    diagnostics: list[ConfigurationDiagnostic],
+) -> tuple[
+    InfrastructureCapabilityReceipt,
+    InfrastructureCapability,
+    str,
+] | None:
+    if context.infrastructure_receipt_error:
+        diagnostics.append(
+            _receipt_error(
+                context.infrastructure_receipt_error,
+                object_ref=fragment.fragment_id or "files.storage",
+            )
+        )
+        return None
+    receipt = context.infrastructure_receipt
+    if receipt is None:
+        diagnostics.append(
+            ConfigurationDiagnostic(
+                severity="blocker",
+                code="infrastructure_receipt_missing",
+                message="Files managed-storage configuration requires the deployment capability receipt.",
+                module_id="files",
+                object_ref=fragment.fragment_id or "files.storage",
+                resolution="Mount the installer-generated receipt and rerun preflight.",
+            )
+        )
+        return None
+    binding_ref = fragment.fragment_id or f"{receipt.installation_id}:files.storage"
+    capability_id = _text(payload.get("capability_id")) or "files.storage"
+    if capability_id != "files.storage":
+        diagnostics.append(
+            _invalid(
+                fragment,
+                "Files managed-storage fragments must reference capability 'files.storage'.",
+            )
+        )
+        return None
+    capability = receipt.capability(capability_id)
+    if capability is None:
+        diagnostics.append(
+            ConfigurationDiagnostic(
+                severity="blocker",
+                code="infrastructure_capability_missing",
+                message="The deployment receipt does not declare managed file storage.",
+                module_id="files",
+                object_ref=binding_ref,
+                resolution="Regenerate the receipt from a deployment profile that declares managed storage.",
+            )
+        )
+        return None
+    state_diagnostic = _storage_capability_state_diagnostic(capability, binding_ref)
+    if state_diagnostic is not None:
+        diagnostics.append(state_diagnostic)
+        return None
+    return receipt, capability, binding_ref
+
+
+def _storage_capability_state_diagnostic(
+    capability: InfrastructureCapability,
+    binding_ref: str,
+) -> ConfigurationDiagnostic | None:
+    if capability.state == "unavailable":
+        return ConfigurationDiagnostic(
+            severity="blocker",
+            code="infrastructure_capability_unavailable",
+            message="The deployment receipt states that managed file storage is unavailable.",
+            module_id="files",
+            object_ref=binding_ref,
+            resolution="Select local, managed Garage, or external S3 storage in the deployment profile.",
+        )
+    if capability.state == "available_unconfigured":
+        return ConfigurationDiagnostic(
+            severity="blocker",
+            code="infrastructure_capability_unconfigured",
+            message="Managed file storage is available but has not been bound by the deployment runtime.",
+            module_id="files",
+            object_ref=binding_ref,
+            resolution="Complete the deployment-owned storage configuration before importing Files configuration.",
+        )
+    return None
+
+
+def _package_expectation_diagnostics(
+    payload: Mapping[str, Any],
+    capability: InfrastructureCapability,
+    expected_backend: str,
+    binding_ref: str,
+) -> list[ConfigurationDiagnostic]:
+    diagnostics: list[ConfigurationDiagnostic] = []
+    package_backend = (
+        _text(payload.get("expected_backend")) or expected_backend
+    ).casefold()
+    if package_backend != expected_backend:
+        diagnostics.append(
+            ConfigurationDiagnostic(
+                severity="blocker",
+                code="infrastructure_backend_mismatch",
+                message="The package storage backend expectation conflicts with the deployment receipt.",
+                module_id="files",
+                object_ref=binding_ref,
+                resolution="Use the receipt backend or regenerate the deployment package after review.",
+            )
+        )
+    package_source = _text(payload.get("expected_source"))
+    if package_source and package_source != capability.source:
+        diagnostics.append(
+            ConfigurationDiagnostic(
+                severity="blocker",
+                code="infrastructure_source_mismatch",
+                message="The package storage source expectation conflicts with the deployment receipt.",
+                module_id="files",
+                object_ref=binding_ref,
+                resolution="Review the provider replacement and regenerate the package from the active receipt.",
+            )
+        )
+    return diagnostics
+
+
+def _expected_backend(source: str) -> str:
+    return "local" if source == "host-local" else "s3"
+
+
+def _normalized_backend(value: object) -> str:
+    clean = str(value or "local").strip().casefold()
+    if clean in {"local", "filesystem", "fs"}:
+        return "local"
+    if clean in {"s3", "garage"}:
+        return "s3"
+    return clean
+
+
+def _redacted_endpoint(value: str, *, default_port: int) -> dict[str, object]:
+    try:
+        parsed = urlsplit(value)
+        host = parsed.hostname
+        if not parsed.scheme or not host:
+            return {"reference": "unresolved"}
+        port = parsed.port or default_port
+    except ValueError:
+        return {"reference": "unresolved"}
+    return {"scheme": parsed.scheme, "host": host, "port": port}
+
+
+def _text(value: object) -> str | None:
+    if value is None:
+        return None
+    text = str(value).strip()
+    return text or None
+
+
+def _receipt_error(error: str, *, object_ref: str) -> ConfigurationDiagnostic:
+    return ConfigurationDiagnostic(
+        severity="blocker",
+        code="infrastructure_receipt_invalid",
+        message=f"The deployment capability receipt is invalid: {error}",
+        module_id="files",
+        object_ref=object_ref,
+        resolution="Repair or regenerate the deployment receipt before importing Files configuration.",
+    )
+
+
+def _invalid(
+    fragment: ConfigurationPackageFragment,
+    message: str,
+) -> ConfigurationDiagnostic:
+    return ConfigurationDiagnostic(
+        severity="blocker",
+        code="files_configuration_payload_invalid",
+        message=message,
+        module_id="files",
+        object_ref=fragment.fragment_id or fragment.fragment_type,
+        resolution="Review the Files configuration-package fragment and rerun preflight.",
+    )
+
+
+def _unsupported(fragment: ConfigurationPackageFragment) -> ConfigurationDiagnostic:
+    return ConfigurationDiagnostic(
+        severity="blocker",
+        code="fragment_type_unsupported",
+        message=f"Files configuration does not support fragment type {fragment.fragment_type!r}.",
+        module_id="files",
+        object_ref=fragment.fragment_id or fragment.fragment_type,
+    )
+
+
+def _blocked_plan(
+    fragment: ConfigurationPackageFragment,
+    summary: str,
+) -> ConfigurationPlanItem:
+    return ConfigurationPlanItem(
+        action="blocked",
+        module_id="files",
+        fragment_type=fragment.fragment_type,
+        fragment_id=fragment.fragment_id,
+        summary=summary,
+    )
+
+
+__all__ = ["FILES_CONFIGURATION_CAPABILITY", "FilesConfigurationProvider"]

src/govoplan_files/backend/db/__init__.py

@@ -1 +1,25 @@
-from govoplan_files.backend.db.models import *
+from govoplan_files.backend.db.models import (
+    CampaignAttachmentUse,
+    FileAsset,
+    FileBlob,
+    FileConnectorCredential,
+    FileConnectorPolicy,
+    FileConnectorProfile,
+    FileConnectorSpace,
+    FileFolder,
+    FileShare,
+    FileVersion,
+)
+
+__all__ = [
+    "CampaignAttachmentUse",
+    "FileAsset",
+    "FileBlob",
+    "FileConnectorCredential",
+    "FileConnectorPolicy",
+    "FileConnectorProfile",
+    "FileConnectorSpace",
+    "FileFolder",
+    "FileShare",
+    "FileVersion",
+]

src/govoplan_files/backend/db/models.py

@@ -4,7 +4,18 @@ import uuid
 from datetime import datetime
 from typing import Any
 
-from sqlalchemy import DateTime, ForeignKey, Index, Integer, JSON, String, Text, UniqueConstraint, text
+from sqlalchemy import (
+    Boolean,
+    DateTime,
+    ForeignKey,
+    Index,
+    Integer,
+    JSON,
+    String,
+    Text,
+    UniqueConstraint,
+    text,
+)
 from sqlalchemy.orm import Mapped, mapped_column
 
 from govoplan_core.db.base import Base, TimestampMixin
@@ -16,18 +27,123 @@ def new_uuid() -> str:
 
 class FileBlob(Base, TimestampMixin):
     __tablename__ = "file_blobs"
-    __table_args__ = (UniqueConstraint("tenant_id", "checksum_sha256", "size_bytes", name="uq_file_blobs_tenant_checksum_size"),)
+    __table_args__ = (
+        UniqueConstraint(
+            "tenant_id",
+            "checksum_sha256",
+            "size_bytes",
+            "protection_discriminator",
+            name="uq_file_blobs_tenant_checksum_size_protection",
+        ),
+    )
 
     id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
-    tenant_id: Mapped[str] = mapped_column(ForeignKey("tenants.id", ondelete="CASCADE"), nullable=False, index=True)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
     storage_backend: Mapped[str] = mapped_column(String(50), nullable=False)
     storage_bucket: Mapped[str | None] = mapped_column(String(255))
     storage_key: Mapped[str] = mapped_column(String(1000), nullable=False)
     checksum_sha256: Mapped[str] = mapped_column(String(64), nullable=False, index=True)
     size_bytes: Mapped[int] = mapped_column(Integer, nullable=False)
+    protection_discriminator: Mapped[str] = mapped_column(
+        String(320), default="plaintext", nullable=False, index=True
+    )
+    encryption_envelope_id: Mapped[str | None] = mapped_column(
+        String(255), nullable=True, index=True
+    )
+    storage_checksum_sha256: Mapped[str | None] = mapped_column(
+        String(64), nullable=True
+    )
+    storage_size_bytes: Mapped[int | None] = mapped_column(Integer, nullable=True)
     content_type: Mapped[str | None] = mapped_column(String(255))
     ref_count: Mapped[int] = mapped_column(Integer, default=1, nullable=False)
     retained_until: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
+    integrity_status: Mapped[str] = mapped_column(
+        String(30), default="unchecked", nullable=False, index=True
+    )
+    integrity_checked_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True, index=True
+    )
+    integrity_failure: Mapped[str | None] = mapped_column(String(100), nullable=True)
+    quarantined_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True, index=True
+    )
+
+
+class FileIntegrityScan(Base, TimestampMixin):
+    __tablename__ = "file_integrity_scans"
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    storage_backend: Mapped[str] = mapped_column(String(50), nullable=False)
+    storage_prefix: Mapped[str] = mapped_column(String(1000), nullable=False)
+    status: Mapped[str] = mapped_column(
+        String(30), default="pending", nullable=False, index=True
+    )
+    revision: Mapped[int] = mapped_column(Integer, default=1, nullable=False)
+    phase: Mapped[str] = mapped_column(String(30), default="blobs", nullable=False)
+    verify_checksums: Mapped[bool] = mapped_column(
+        Boolean, default=True, nullable=False
+    )
+    batch_size: Mapped[int] = mapped_column(Integer, default=100, nullable=False)
+    blob_cursor: Mapped[str | None] = mapped_column(String(36), nullable=True)
+    object_cursor: Mapped[str | None] = mapped_column(String(1000), nullable=True)
+    scanned_blob_count: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
+    verified_blob_count: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
+    quarantined_blob_count: Mapped[int] = mapped_column(
+        Integer, default=0, nullable=False
+    )
+    scanned_object_count: Mapped[int] = mapped_column(
+        Integer, default=0, nullable=False
+    )
+    orphan_object_count: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
+    created_by_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+    started_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True
+    )
+    completed_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True
+    )
+    last_error: Mapped[str | None] = mapped_column(String(255), nullable=True)
+
+
+class FileIntegrityFinding(Base, TimestampMixin):
+    __tablename__ = "file_integrity_findings"
+    __table_args__ = (
+        Index("ix_file_integrity_findings_scan_state", "scan_id", "state"),
+    )
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
+    scan_id: Mapped[str] = mapped_column(
+        ForeignKey("file_integrity_scans.id", ondelete="CASCADE"),
+        nullable=False,
+        index=True,
+    )
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    kind: Mapped[str] = mapped_column(String(40), nullable=False, index=True)
+    state: Mapped[str] = mapped_column(
+        String(30), default="open", nullable=False, index=True
+    )
+    revision: Mapped[int] = mapped_column(Integer, default=1, nullable=False)
+    blob_id: Mapped[str | None] = mapped_column(
+        ForeignKey("file_blobs.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+    storage_key: Mapped[str] = mapped_column(String(1000), nullable=False)
+    expected_size_bytes: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    observed_size_bytes: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    expected_checksum_sha256: Mapped[str | None] = mapped_column(
+        String(64), nullable=True
+    )
+    observed_checksum_sha256: Mapped[str | None] = mapped_column(
+        String(64), nullable=True
+    )
+    resolved_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True
+    )
+    resolved_by_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
 
 
 class FileFolder(Base, TimestampMixin):
@@ -35,14 +151,18 @@ class FileFolder(Base, TimestampMixin):
     __table_args__ = (
         Index(
             "uq_file_folders_active_user_path",
-            "tenant_id", "owner_user_id", "path",
+            "tenant_id",
+            "owner_user_id",
+            "path",
             unique=True,
             sqlite_where=text("owner_type = 'user' AND deleted_at IS NULL"),
             postgresql_where=text("owner_type = 'user' AND deleted_at IS NULL"),
         ),
         Index(
             "uq_file_folders_active_group_path",
-            "tenant_id", "owner_group_id", "path",
+            "tenant_id",
+            "owner_group_id",
+            "path",
             unique=True,
             sqlite_where=text("owner_type = 'group' AND deleted_at IS NULL"),
             postgresql_where=text("owner_type = 'group' AND deleted_at IS NULL"),
@@ -50,91 +170,414 @@ class FileFolder(Base, TimestampMixin):
     )
 
     id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
-    tenant_id: Mapped[str] = mapped_column(ForeignKey("tenants.id", ondelete="CASCADE"), nullable=False, index=True)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
     owner_type: Mapped[str] = mapped_column(String(20), nullable=False, index=True)
-    owner_user_id: Mapped[str | None] = mapped_column(ForeignKey("users.id", ondelete="SET NULL"), nullable=True, index=True)
-    owner_group_id: Mapped[str | None] = mapped_column(ForeignKey("groups.id", ondelete="SET NULL"), nullable=True, index=True)
+    owner_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+    owner_group_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_groups.id", ondelete="SET NULL"), nullable=True, index=True
+    )
     path: Mapped[str] = mapped_column(String(1000), nullable=False, index=True)
-    created_by_user_id: Mapped[str | None] = mapped_column(ForeignKey("users.id", ondelete="SET NULL"), nullable=True, index=True)
-    deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
-    metadata_: Mapped[dict[str, Any] | None] = mapped_column("metadata", JSON, nullable=True)
+    created_by_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+    deleted_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True, index=True
+    )
+    metadata_: Mapped[dict[str, Any] | None] = mapped_column(
+        "metadata", JSON, nullable=True
+    )
 
 
 class FileAsset(Base, TimestampMixin):
     __tablename__ = "file_assets"
 
     id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
-    tenant_id: Mapped[str] = mapped_column(ForeignKey("tenants.id", ondelete="CASCADE"), nullable=False, index=True)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
     owner_type: Mapped[str] = mapped_column(String(20), nullable=False, index=True)
-    owner_user_id: Mapped[str | None] = mapped_column(ForeignKey("users.id", ondelete="SET NULL"), nullable=True, index=True)
-    owner_group_id: Mapped[str | None] = mapped_column(ForeignKey("groups.id", ondelete="SET NULL"), nullable=True, index=True)
-    current_version_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    owner_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+    owner_group_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_groups.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+    current_version_id: Mapped[str | None] = mapped_column(
+        String(36), nullable=True, index=True
+    )
     display_path: Mapped[str] = mapped_column(String(1000), nullable=False, index=True)
     filename: Mapped[str] = mapped_column(String(500), nullable=False, index=True)
     description: Mapped[str | None] = mapped_column(Text)
-    created_by_user_id: Mapped[str | None] = mapped_column(ForeignKey("users.id", ondelete="SET NULL"), nullable=True, index=True)
-    deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
-    metadata_: Mapped[dict[str, Any] | None] = mapped_column("metadata", JSON, nullable=True)
+    created_by_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+    deleted_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True, index=True
+    )
+    retained_until: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True, index=True
+    )
+    legal_hold: Mapped[bool] = mapped_column(
+        Boolean, default=False, nullable=False, index=True
+    )
+    lifecycle_revision: Mapped[int] = mapped_column(
+        Integer, default=1, nullable=False
+    )
+    lifecycle_reason: Mapped[str | None] = mapped_column(String(500), nullable=True)
+    metadata_: Mapped[dict[str, Any] | None] = mapped_column(
+        "metadata", JSON, nullable=True
+    )
 
 
 class FileVersion(Base, TimestampMixin):
     __tablename__ = "file_versions"
-    __table_args__ = (UniqueConstraint("file_asset_id", "version_number", name="uq_file_versions_asset_number"),)
+    __table_args__ = (
+        UniqueConstraint(
+            "file_asset_id", "version_number", name="uq_file_versions_asset_number"
+        ),
+    )
 
     id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
-    tenant_id: Mapped[str] = mapped_column(ForeignKey("tenants.id", ondelete="CASCADE"), nullable=False, index=True)
-    file_asset_id: Mapped[str] = mapped_column(ForeignKey("file_assets.id", ondelete="CASCADE"), nullable=False, index=True)
-    blob_id: Mapped[str] = mapped_column(ForeignKey("file_blobs.id", ondelete="RESTRICT"), nullable=False, index=True)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    file_asset_id: Mapped[str] = mapped_column(
+        ForeignKey("file_assets.id", ondelete="CASCADE"), nullable=False, index=True
+    )
+    blob_id: Mapped[str] = mapped_column(
+        ForeignKey("file_blobs.id", ondelete="RESTRICT"), nullable=False, index=True
+    )
     version_number: Mapped[int] = mapped_column(Integer, nullable=False)
     filename_at_upload: Mapped[str] = mapped_column(String(500), nullable=False)
     display_path_at_upload: Mapped[str] = mapped_column(String(1000), nullable=False)
     content_type: Mapped[str | None] = mapped_column(String(255))
     size_bytes: Mapped[int] = mapped_column(Integer, nullable=False)
     checksum_sha256: Mapped[str] = mapped_column(String(64), nullable=False, index=True)
-    created_by_user_id: Mapped[str | None] = mapped_column(ForeignKey("users.id", ondelete="SET NULL"), nullable=True, index=True)
+    created_by_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+
+
+class FileFormEvidenceGrant(Base, TimestampMixin):
+    __tablename__ = "file_form_evidence_grants"
+    __table_args__ = (
+        UniqueConstraint(
+            "tenant_id",
+            "idempotency_key",
+            name="uq_file_form_evidence_grants_idempotency",
+        ),
+        Index(
+            "ix_file_form_evidence_grants_form",
+            "tenant_id",
+            "form_instance_id",
+            "form_definition_id",
+            "form_definition_revision",
+        ),
+    )
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    form_instance_id: Mapped[str] = mapped_column(
+        String(36), nullable=False, index=True
+    )
+    form_definition_id: Mapped[str] = mapped_column(String(255), nullable=False)
+    form_definition_revision: Mapped[str] = mapped_column(String(255), nullable=False)
+    token_sha256: Mapped[str] = mapped_column(String(64), nullable=False, unique=True)
+    idempotency_key: Mapped[str] = mapped_column(String(255), nullable=False)
+    request_sha256: Mapped[str] = mapped_column(String(64), nullable=False)
+    custodian_user_id: Mapped[str] = mapped_column(
+        ForeignKey("access_users.id", ondelete="RESTRICT"),
+        nullable=False,
+        index=True,
+    )
+    evidence_kind: Mapped[str] = mapped_column(String(30), nullable=False)
+    purpose: Mapped[str] = mapped_column(String(500), nullable=False)
+    status: Mapped[str] = mapped_column(
+        String(30), default="issued", nullable=False, index=True
+    )
+    expires_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False, index=True
+    )
+    max_size_bytes: Mapped[int] = mapped_column(Integer, nullable=False)
+    allowed_content_types: Mapped[list[str]] = mapped_column(
+        JSON, default=list, nullable=False
+    )
+    file_asset_id: Mapped[str | None] = mapped_column(
+        ForeignKey("file_assets.id", ondelete="RESTRICT"), nullable=True, index=True
+    )
+    file_version_id: Mapped[str | None] = mapped_column(
+        ForeignKey("file_versions.id", ondelete="RESTRICT"), nullable=True, index=True
+    )
+    uploaded_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True
+    )
+    revoked_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True
+    )
+    metadata_: Mapped[dict[str, Any]] = mapped_column(
+        "metadata", JSON, default=dict, nullable=False
+    )
 
 
 class FileShare(Base, TimestampMixin):
     __tablename__ = "file_shares"
-    __table_args__ = (UniqueConstraint("file_asset_id", "target_type", "target_id", "revoked_at", name="uq_file_shares_active_target"),)
+    __table_args__ = (
+        UniqueConstraint(
+            "file_asset_id",
+            "target_type",
+            "target_id",
+            "revoked_at",
+            name="uq_file_shares_active_target",
+        ),
+    )
 
     id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
-    tenant_id: Mapped[str] = mapped_column(ForeignKey("tenants.id", ondelete="CASCADE"), nullable=False, index=True)
-    file_asset_id: Mapped[str] = mapped_column(ForeignKey("file_assets.id", ondelete="CASCADE"), nullable=False, index=True)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    file_asset_id: Mapped[str] = mapped_column(
+        ForeignKey("file_assets.id", ondelete="CASCADE"), nullable=False, index=True
+    )
     target_type: Mapped[str] = mapped_column(String(20), nullable=False, index=True)
     target_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
     permission: Mapped[str] = mapped_column(String(20), default="read", nullable=False)
-    created_by_user_id: Mapped[str | None] = mapped_column(ForeignKey("users.id", ondelete="SET NULL"), nullable=True, index=True)
-    revoked_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
+    created_by_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+    expires_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True, index=True
+    )
+    revoked_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True, index=True
+    )
+    revoked_by_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+
+
+class FileConnectorProfile(Base, TimestampMixin):
+    __tablename__ = "file_connector_profiles"
+    __table_args__ = (
+        Index("ix_file_connector_profiles_scope", "scope_type", "scope_id"),
+    )
+
+    id: Mapped[str] = mapped_column(String(255), primary_key=True)
+    tenant_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    scope_type: Mapped[str] = mapped_column(
+        String(20), default="tenant", nullable=False, index=True
+    )
+    scope_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    label: Mapped[str] = mapped_column(String(255), nullable=False)
+    provider: Mapped[str] = mapped_column(String(50), nullable=False, index=True)
+    endpoint_url: Mapped[str | None] = mapped_column(String(1000), nullable=True)
+    base_path: Mapped[str | None] = mapped_column(String(1000), nullable=True)
+    enabled: Mapped[bool] = mapped_column(
+        Boolean, default=True, nullable=False, index=True
+    )
+    credential_profile_id: Mapped[str | None] = mapped_column(
+        String(255), nullable=True, index=True
+    )
+    credential_mode: Mapped[str] = mapped_column(
+        String(30), default="none", nullable=False
+    )
+    username: Mapped[str | None] = mapped_column(String(320), nullable=True)
+    password_encrypted: Mapped[str | None] = mapped_column(Text, nullable=True)
+    token_encrypted: Mapped[str | None] = mapped_column(Text, nullable=True)
+    password_env: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    token_env: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    secret_ref: Mapped[str | None] = mapped_column(String(1000), nullable=True)
+    capabilities: Mapped[list[str] | None] = mapped_column(JSON, nullable=True)
+    policy: Mapped[dict[str, Any] | None] = mapped_column(JSON, nullable=True)
+    metadata_: Mapped[dict[str, Any] | None] = mapped_column(
+        "metadata", JSON, nullable=True
+    )
+    created_by_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+    updated_by_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+
+
+class FileConnectorCredential(Base, TimestampMixin):
+    __tablename__ = "file_connector_credentials"
+    __table_args__ = (
+        Index("ix_file_connector_credentials_scope", "scope_type", "scope_id"),
+    )
+
+    id: Mapped[str] = mapped_column(String(255), primary_key=True)
+    tenant_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    scope_type: Mapped[str] = mapped_column(
+        String(20), default="tenant", nullable=False, index=True
+    )
+    scope_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    label: Mapped[str] = mapped_column(String(255), nullable=False)
+    provider: Mapped[str | None] = mapped_column(String(50), nullable=True, index=True)
+    enabled: Mapped[bool] = mapped_column(
+        Boolean, default=True, nullable=False, index=True
+    )
+    credential_mode: Mapped[str] = mapped_column(
+        String(30), default="none", nullable=False
+    )
+    username: Mapped[str | None] = mapped_column(String(320), nullable=True)
+    password_encrypted: Mapped[str | None] = mapped_column(Text, nullable=True)
+    token_encrypted: Mapped[str | None] = mapped_column(Text, nullable=True)
+    password_env: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    token_env: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    secret_ref: Mapped[str | None] = mapped_column(String(1000), nullable=True)
+    policy: Mapped[dict[str, Any] | None] = mapped_column(JSON, nullable=True)
+    metadata_: Mapped[dict[str, Any] | None] = mapped_column(
+        "metadata", JSON, nullable=True
+    )
+    created_by_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+    updated_by_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+
+
+class FileConnectorPolicy(Base, TimestampMixin):
+    __tablename__ = "file_connector_policies"
+    __table_args__ = (
+        UniqueConstraint(
+            "tenant_id",
+            "scope_type",
+            "scope_id",
+            name="uq_file_connector_policies_scope",
+        ),
+        Index("ix_file_connector_policies_scope", "scope_type", "scope_id"),
+    )
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
+    tenant_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    scope_type: Mapped[str] = mapped_column(String(20), nullable=False, index=True)
+    scope_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    policy: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict, nullable=False)
+    created_by_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+    updated_by_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+
+
+class FileConnectorSpace(Base, TimestampMixin):
+    __tablename__ = "file_connector_spaces"
+    __table_args__ = (
+        Index(
+            "ix_file_connector_spaces_owner",
+            "tenant_id",
+            "owner_type",
+            "owner_user_id",
+            "owner_group_id",
+        ),
+        Index(
+            "uq_file_connector_spaces_active_user_label",
+            "tenant_id",
+            "owner_user_id",
+            "label",
+            unique=True,
+            sqlite_where=text("owner_type = 'user' AND deleted_at IS NULL"),
+            postgresql_where=text("owner_type = 'user' AND deleted_at IS NULL"),
+        ),
+        Index(
+            "uq_file_connector_spaces_active_group_label",
+            "tenant_id",
+            "owner_group_id",
+            "label",
+            unique=True,
+            sqlite_where=text("owner_type = 'group' AND deleted_at IS NULL"),
+            postgresql_where=text("owner_type = 'group' AND deleted_at IS NULL"),
+        ),
+    )
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    owner_type: Mapped[str] = mapped_column(String(20), nullable=False, index=True)
+    owner_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+    owner_group_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_groups.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+    label: Mapped[str] = mapped_column(String(255), nullable=False)
+    connector_profile_id: Mapped[str] = mapped_column(
+        String(255), nullable=False, index=True
+    )
+    provider: Mapped[str] = mapped_column(String(50), nullable=False, index=True)
+    library_id: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    remote_path: Mapped[str] = mapped_column(String(1000), default="", nullable=False)
+    sync_mode: Mapped[str] = mapped_column(String(30), default="manual", nullable=False)
+    read_only: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
+    is_active: Mapped[bool] = mapped_column(
+        Boolean, default=True, nullable=False, index=True
+    )
+    created_by_user_id: Mapped[str | None] = mapped_column(
+        ForeignKey("access_users.id", ondelete="SET NULL"), nullable=True, index=True
+    )
+    deleted_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True, index=True
+    )
+    metadata_: Mapped[dict[str, Any] | None] = mapped_column(
+        "metadata", JSON, nullable=True
+    )
 
 
 class CampaignAttachmentUse(Base, TimestampMixin):
     __tablename__ = "campaign_attachment_uses"
-    __table_args__ = (UniqueConstraint("campaign_job_id", "file_version_id", "filename_used", "use_stage", name="uq_campaign_attachment_uses_job_file_stage"),)
+    __table_args__ = (
+        UniqueConstraint(
+            "campaign_job_id",
+            "file_version_id",
+            "filename_used",
+            "use_stage",
+            name="uq_campaign_attachment_uses_job_file_stage",
+        ),
+    )
 
     id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
-    tenant_id: Mapped[str] = mapped_column(ForeignKey("tenants.id", ondelete="CASCADE"), nullable=False, index=True)
-    campaign_id: Mapped[str] = mapped_column(ForeignKey("campaigns.id", ondelete="CASCADE"), nullable=False, index=True)
-    campaign_version_id: Mapped[str] = mapped_column(ForeignKey("campaign_versions.id", ondelete="CASCADE"), nullable=False, index=True)
-    campaign_job_id: Mapped[str | None] = mapped_column(ForeignKey("campaign_jobs.id", ondelete="SET NULL"), nullable=True, index=True)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    campaign_id: Mapped[str] = mapped_column(
+        ForeignKey("campaigns.id", ondelete="CASCADE"), nullable=False, index=True
+    )
+    campaign_version_id: Mapped[str] = mapped_column(
+        ForeignKey("campaign_versions.id", ondelete="CASCADE"),
+        nullable=False,
+        index=True,
+    )
+    campaign_job_id: Mapped[str | None] = mapped_column(
+        ForeignKey("campaign_jobs.id", ondelete="SET NULL"), nullable=True, index=True
+    )
     entry_index: Mapped[int | None] = mapped_column(Integer)
     entry_id: Mapped[str | None] = mapped_column(String(255), index=True)
-    file_asset_id: Mapped[str] = mapped_column(ForeignKey("file_assets.id", ondelete="RESTRICT"), nullable=False, index=True)
-    file_version_id: Mapped[str] = mapped_column(ForeignKey("file_versions.id", ondelete="RESTRICT"), nullable=False, index=True)
-    file_blob_id: Mapped[str] = mapped_column(ForeignKey("file_blobs.id", ondelete="RESTRICT"), nullable=False, index=True)
+    file_asset_id: Mapped[str] = mapped_column(
+        ForeignKey("file_assets.id", ondelete="RESTRICT"), nullable=False, index=True
+    )
+    file_version_id: Mapped[str] = mapped_column(
+        ForeignKey("file_versions.id", ondelete="RESTRICT"), nullable=False, index=True
+    )
+    file_blob_id: Mapped[str] = mapped_column(
+        ForeignKey("file_blobs.id", ondelete="RESTRICT"), nullable=False, index=True
+    )
     filename_used: Mapped[str] = mapped_column(String(500), nullable=False)
     checksum_sha256: Mapped[str] = mapped_column(String(64), nullable=False)
     size_bytes: Mapped[int] = mapped_column(Integer, nullable=False)
     content_type: Mapped[str | None] = mapped_column(String(255))
-    use_stage: Mapped[str] = mapped_column(String(20), default="built", nullable=False, index=True)
-    used_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
+    use_stage: Mapped[str] = mapped_column(
+        String(20), default="built", nullable=False, index=True
+    )
+    used_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True, index=True
+    )
 
 
 __all__ = [
     "CampaignAttachmentUse",
     "FileAsset",
     "FileBlob",
+    "FileConnectorCredential",
+    "FileConnectorPolicy",
+    "FileConnectorProfile",
+    "FileConnectorSpace",
     "FileFolder",
+    "FileFormEvidenceGrant",
     "FileShare",
     "FileVersion",
 ]

src/govoplan_files/backend/documentation.py

@@ -0,0 +1,517 @@
+from __future__ import annotations
+
+from sqlalchemy.orm import Session
+
+from govoplan_core.core.campaigns import (
+    CAPABILITY_CAMPAIGNS_ACCESS,
+    CampaignAccessProvider,
+)
+from govoplan_core.core.modules import (
+    DocumentationCondition,
+    DocumentationContext,
+    DocumentationLink,
+    DocumentationTopic,
+)
+from govoplan_files.backend.storage.archives import ARCHIVE_UPLOAD_MAX_ENTRIES
+from govoplan_files.backend.storage.access import user_group_ids
+from govoplan_files.backend.storage.connector_visibility import (
+    connector_profile_usable_for_import,
+    visible_connector_profiles_for_actor,
+)
+
+
+_DEFAULT_UPLOAD_MAX_BYTES = 50 * 1024 * 1024
+_DEFAULT_ZIP_MAX_BYTES = 250 * 1024 * 1024
+_DEFAULT_ARCHIVE_MAX_EXPANDED_BYTES = 2 * 1024 * 1024 * 1024
+_DEFAULT_ARCHIVE_MAX_EXPANSION_RATIO = 100
+_DEFAULT_ARCHIVE_PREVIEW_TTL_SECONDS = 30 * 60
+_FILES_READ_SCOPE = "files:file:read"
+_FILES_UPLOAD_SCOPE = "files:file:upload"
+
+
+def documentation_topics(
+    context: DocumentationContext,
+) -> tuple[DocumentationTopic, ...]:
+    if context.documentation_type != "user":
+        return ()
+
+    upload_limit = _configured_positive_int(
+        context.settings,
+        "file_upload_max_bytes",
+        default=_DEFAULT_UPLOAD_MAX_BYTES,
+    )
+    zip_limit = _configured_positive_int(
+        context.settings,
+        "file_upload_zip_max_bytes",
+        default=_DEFAULT_ZIP_MAX_BYTES,
+    )
+    archive_expanded_limit = _configured_positive_int(
+        context.settings,
+        "file_archive_max_expanded_bytes",
+        default=_DEFAULT_ARCHIVE_MAX_EXPANDED_BYTES,
+    )
+    archive_entry_limit = _configured_positive_int(
+        context.settings,
+        "file_archive_max_entries",
+        default=ARCHIVE_UPLOAD_MAX_ENTRIES,
+    )
+    archive_ratio_limit = _configured_positive_int(
+        context.settings,
+        "file_archive_max_expansion_ratio",
+        default=_DEFAULT_ARCHIVE_MAX_EXPANSION_RATIO,
+    )
+    archive_preview_ttl = _configured_positive_int(
+        context.settings,
+        "file_archive_preview_ttl_seconds",
+        default=_DEFAULT_ARCHIVE_PREVIEW_TTL_SECONDS,
+    )
+    topics: list[DocumentationTopic] = []
+    if upload_limit is not None:
+        topics.append(_upload_topic(upload_limit))
+    if (
+        upload_limit is not None
+        and zip_limit is not None
+        and archive_expanded_limit is not None
+        and archive_entry_limit is not None
+        and archive_ratio_limit is not None
+        and archive_preview_ttl is not None
+    ):
+        topics.append(
+            _archive_topic(
+                upload_limit,
+                zip_limit,
+                archive_expanded_limit,
+                archive_entry_limit,
+                archive_ratio_limit,
+                archive_preview_ttl,
+            )
+        )
+    topics.append(_connector_import_topic(context))
+    return tuple(topics)
+
+
+def _upload_topic(max_bytes: int) -> DocumentationTopic:
+    limit = _format_byte_limit(max_bytes)
+    return DocumentationTopic(
+        id="files.workflow.upload-managed-files",
+        title="Upload managed files",
+        summary=f"Upload files to a personal or accessible group space; each uploaded file may contain at most {limit}.",
+        body=(
+            f"The current deployment accepts at most {limit} for each ordinary upload. "
+            "A name conflict is never resolved silently: reject stops the upload, rename chooses a copy name, and overwrite retires the old asset before creating a new one."
+        ),
+        layer="configured",
+        documentation_types=("user",),
+        audience=("file_user", "file_manager", "process_participant"),
+        order=39,
+        conditions=(
+            DocumentationCondition(
+                required_modules=("files",),
+                required_scopes=(_FILES_READ_SCOPE, _FILES_UPLOAD_SCOPE),
+            ),
+        ),
+        links=(
+            DocumentationLink(label="Files", href="/files", kind="runtime"),
+            DocumentationLink(
+                label="Files handbook",
+                href="govoplan-files/docs/FILES_HANDBOOK.md",
+                kind="repository",
+            ),
+        ),
+        related_modules=("campaigns",),
+        unlocks=(
+            "Users and connected processes can place governed content in managed storage.",
+        ),
+        source_module_id="files",
+        metadata={
+            "kind": "workflow",
+            "route": "/files",
+            "screen": "Files",
+            "help_contexts": ["files.list"],
+            "prerequisites": [
+                "You may view and upload managed files.",
+                "The destination personal or group space grants this account write access; upload permission alone does not grant access to every space.",
+            ],
+            "steps": [
+                "Open Files and choose My files or an accessible group space.",
+                "Open the intended destination folder and choose Upload, or drag files into the file list.",
+                "For every name conflict, explicitly reject, rename, overwrite, or skip the affected item.",
+                "Wait for the upload to finish, then open the resulting file details.",
+            ],
+            "outcome": "Each accepted file is stored as a governed managed asset in the selected space.",
+            "verification": "Confirm the owner, logical path, size, checksum, and current version in Files.",
+            "constraints": [
+                {
+                    "id": "ordinary-upload-size",
+                    "label": "Maximum size per file",
+                    "description": f"The current safe upload limit is {limit} per file.",
+                    "values": [limit],
+                },
+            ],
+            "related_topic_ids": [
+                "files.workflow.upload-and-unpack-zip",
+                "files.workflow.organize-managed-files",
+                "files.workflow.find-and-download-files",
+            ],
+        },
+    )
+
+
+def _archive_topic(
+    max_file_bytes: int,
+    max_archive_request_bytes: int,
+    max_expanded_bytes: int,
+    max_entries: int,
+    max_expansion_ratio: int,
+    preview_ttl_seconds: int,
+) -> DocumentationTopic:
+    member_limit = _format_byte_limit(max_file_bytes)
+    request_limit = _format_byte_limit(max_archive_request_bytes)
+    expanded_limit = _format_byte_limit(max_expanded_bytes)
+    preview_minutes = max(1, preview_ttl_seconds // 60)
+    return DocumentationTopic(
+        id="files.workflow.upload-and-unpack-zip",
+        title="Preview and unpack an archive",
+        summary=(
+            f"Review and selectively unpack up to {max_entries:,} entries from ZIP or TAR archives before any managed file is created."
+        ),
+        body=(
+            f"The deployment accepts ZIP, TAR, TAR.GZ, TAR.BZ2, and TAR.XZ requests up to {request_limit}, limits actual expanded data to {expanded_limit}, "
+            f"each member to {member_limit}, the archive to {max_entries:,} entries, and expansion to {max_expansion_ratio}:1. "
+            f"The server-issued preview expires after {preview_minutes} minutes. Password-protected ZIP archives are supported; passwords remain request-only. "
+            "Unsafe paths and special filesystem entries are rejected. Actual extracted bytes are counted instead of trusting archive headers."
+        ),
+        layer="configured",
+        documentation_types=("user",),
+        audience=("file_user", "file_manager", "process_participant"),
+        order=40,
+        conditions=(
+            DocumentationCondition(
+                required_modules=("files",),
+                required_scopes=(_FILES_READ_SCOPE, _FILES_UPLOAD_SCOPE),
+            ),
+        ),
+        links=(
+            DocumentationLink(label="Files", href="/files", kind="runtime"),
+            DocumentationLink(
+                label="Files handbook",
+                href="govoplan-files/docs/FILES_HANDBOOK.md",
+                kind="repository",
+            ),
+        ),
+        unlocks=(
+            "A bounded archive can become governed managed files without trusting archive paths or size declarations.",
+        ),
+        source_module_id="files",
+        metadata={
+            "kind": "workflow",
+            "route": "/files",
+            "screen": "Files",
+            "help_contexts": ["files.list"],
+            "prerequisites": [
+                "You may view and upload managed files.",
+                "The archive fits the configured request, expansion, size, and entry limits.",
+                "The destination personal or group space grants this account write access.",
+            ],
+            "steps": [
+                "Open Files and choose the managed destination space and folder.",
+                "Enable Preview and unpack archive, then choose or drag one supported archive.",
+                "Review the discovered entries, supply a ZIP password when required, and select the files or folders to import.",
+                "Resolve every destination conflict explicitly.",
+                "Confirm the selection, then wait for extraction and finalization to finish before leaving the page.",
+            ],
+            "outcome": "Accepted archive members are stored as separate governed managed assets below the selected folder.",
+            "verification": "Confirm the expected member paths and inspect representative file sizes, checksums, and versions.",
+            "constraints": [
+                {
+                    "id": "archive-request-and-total",
+                    "label": "Maximum archive request and expanded total",
+                    "description": f"The compressed request is limited to {request_limit}; actual expanded data is limited to {expanded_limit}.",
+                    "values": [request_limit, expanded_limit],
+                },
+                {
+                    "id": "archive-member-size",
+                    "label": "Maximum extracted member size",
+                    "description": f"Each extracted file is limited to {member_limit}.",
+                    "values": [member_limit],
+                },
+                {
+                    "id": "archive-entry-count",
+                    "label": "Maximum entry count",
+                    "description": f"An archive may contain at most {max_entries:,} declared entries.",
+                    "values": [f"{max_entries:,} entries"],
+                },
+                {
+                    "id": "archive-expansion-ratio",
+                    "label": "Maximum expansion ratio",
+                    "description": f"Declared and actual output may not exceed {max_expansion_ratio} times the compressed request size.",
+                    "values": [f"{max_expansion_ratio}:1"],
+                },
+            ],
+            "related_topic_ids": [
+                "files.workflow.upload-managed-files",
+                "files.workflow.organize-managed-files",
+                "files.workflow.find-and-download-files",
+            ],
+        },
+    )
+
+
+def _connector_import_topic(context: DocumentationContext) -> DocumentationTopic:
+    principal = context.principal
+    if not _has_all_scopes(principal, (_FILES_READ_SCOPE, _FILES_UPLOAD_SCOPE)):
+        return _connector_import_limitation(
+            "Connector import is not available to this account because both permission to view Files and permission to upload managed files are required."
+        )
+
+    tenant_id = _safe_text_attribute(principal, "tenant_id")
+    user_id = _safe_text_attribute(getattr(principal, "user", None), "id")
+    session = context.session
+    if not tenant_id or not user_id or not isinstance(session, Session):
+        return _connector_import_limitation(
+            "Connector import availability could not be safely evaluated for this request. Try again, or ask a Files administrator to verify an actor-visible connection."
+        )
+
+    try:
+        member_group_ids = _actor_group_ids(
+            session,
+            principal=principal,
+            tenant_id=tenant_id,
+            user_id=user_id,
+            include_admin_groups=False,
+        )
+        connector_group_ids = (
+            _actor_group_ids(
+                session,
+                principal=principal,
+                tenant_id=tenant_id,
+                user_id=user_id,
+                include_admin_groups=True,
+            )
+            if _has_all_scopes(principal, ("files:file:admin",))
+            else member_group_ids
+        )
+        profiles = visible_connector_profiles_for_actor(
+            session,
+            tenant_id=tenant_id,
+            user_id=user_id,
+            group_ids=connector_group_ids,
+            settings=context.settings,
+            campaign_visible=_campaign_visibility(
+                context,
+                session=session,
+                tenant_id=tenant_id,
+                user_id=user_id,
+                group_ids=member_group_ids,
+            ),
+            include_effective_policy=True,
+        )
+        usable_profiles = tuple(
+            profile
+            for profile in profiles
+            if connector_profile_usable_for_import(profile)
+        )
+    except Exception:
+        return _connector_import_limitation(
+            "Connector import availability could not be safely evaluated for this request. Try again, or ask a Files administrator to verify an actor-visible connection."
+        )
+    if not usable_profiles:
+        return _connector_import_limitation(
+            "No connection visible to this account is currently eligible to offer an enabled, credential-ready, policy-allowed browse/import path through a pinning-safe provider. Ask a Files administrator to configure or authorize one."
+        )
+
+    return DocumentationTopic(
+        id="files.workflow.import-managed-snapshot",
+        title="Import an external file as a governed snapshot",
+        summary="Browse an authorized connection read-only and import one selected file into managed storage as a frozen, traceable snapshot.",
+        body=(
+            "At least one connection visible to this account is currently eligible to offer the governed browse/import path. "
+            "The selected remote path and item are re-authorized when used, and browse, import, and sync never mutate the remote source. "
+            "The managed snapshot stays unchanged until an explicit manual sync."
+        ),
+        layer="configured",
+        documentation_types=("user",),
+        audience=("file_user", "campaign_manager", "report_author"),
+        order=41,
+        conditions=(
+            DocumentationCondition(
+                required_modules=("files",),
+                required_scopes=(_FILES_READ_SCOPE, _FILES_UPLOAD_SCOPE),
+            ),
+        ),
+        links=(
+            DocumentationLink(label="Files", href="/files", kind="runtime"),
+            DocumentationLink(
+                label="Files handbook",
+                href="govoplan-files/docs/FILES_HANDBOOK.md",
+                kind="repository",
+            ),
+        ),
+        related_modules=("campaigns",),
+        unlocks=(
+            "Campaigns, reports, and workflows can consume a managed snapshot with stable source evidence.",
+        ),
+        source_module_id="files",
+        metadata={
+            "kind": "workflow",
+            "route": "/files",
+            "screen": "Files",
+            "help_contexts": ["files.list", "files.connector-import"],
+            "prerequisites": [
+                "You may view and upload managed files.",
+                "At least one enabled, credential-ready, policy-allowed connection using a pinning-safe provider is visible to this account.",
+                "The selected remote path and item must pass their operation-time policy checks.",
+                "The managed destination space grants this account write access.",
+            ],
+            "steps": [
+                "Open Files and choose a managed destination space.",
+                "Choose Sync from connection, select an available connection, and browse to the permitted remote file.",
+                "Import the selected file and resolve any destination conflict explicitly.",
+                "Review the managed file's source and current-version details before using it in another task.",
+            ],
+            "current_configuration": [
+                "At least one actor-visible connection is eligible to offer a safe browse/import operation; the selected endpoint, path, and item are still checked when used.",
+                "Every selected remote path and item is re-authorized at operation time.",
+            ],
+            "outcome": "The external content is a tenant-managed snapshot with a checksum, exact version, and recorded source context.",
+            "verification": "Reopen the managed file and confirm its recorded source context, source revision when available, checksum, and current version.",
+            "related_topic_ids": [
+                "files.governed-connectors-and-provenance",
+                "files.reference.integrity-recovery-and-fail-closed-transports",
+                "files.reference.snapshot-provenance-and-capabilities",
+            ],
+        },
+    )
+
+
+def _connector_import_limitation(message: str) -> DocumentationTopic:
+    return DocumentationTopic(
+        id="files.connector-import-unavailable",
+        title="External file import is not currently available",
+        summary=message,
+        body=(
+            f"{message} Files never exposes connection endpoints, storage paths, credential references, or raw connector policies in user documentation."
+        ),
+        layer="available",
+        documentation_types=("user",),
+        order=41,
+        conditions=(
+            DocumentationCondition(
+                required_modules=("files",),
+                any_scopes=(_FILES_READ_SCOPE, _FILES_UPLOAD_SCOPE),
+            ),
+        ),
+        links=(DocumentationLink(label="Files", href="/files", kind="runtime"),),
+        source_module_id="files",
+        metadata={
+            "kind": "reference",
+            "screen": "Files",
+            "help_contexts": ["files.list", "files.connector-import"],
+            "limitations": [message],
+        },
+    )
+
+
+def _configured_positive_int(
+    settings: object | None, name: str, *, default: int
+) -> int | None:
+    raw_value = getattr(settings, name, default) if settings is not None else default
+    try:
+        value = int(raw_value)
+    except (TypeError, ValueError):
+        return None
+    return value if value > 0 else None
+
+
+def _format_byte_limit(value: int) -> str:
+    units = ((1024**3, "GiB"), (1024**2, "MiB"), (1024, "KiB"))
+    for divisor, label in units:
+        if value % divisor == 0:
+            return f"{value // divisor:,} {label} ({value:,} bytes)"
+    return f"{value:,} bytes"
+
+
+def _has_all_scopes(principal: object | None, scopes: tuple[str, ...]) -> bool:
+    checker = getattr(principal, "has", None)
+    if callable(checker):
+        try:
+            return all(bool(checker(scope)) for scope in scopes)
+        except Exception:
+            return False
+    granted = {str(scope) for scope in getattr(principal, "scopes", ())}
+    return all(scope in granted for scope in scopes)
+
+
+def _safe_text_attribute(value: object | None, name: str) -> str:
+    try:
+        result = getattr(value, name, "")
+    except Exception:
+        return ""
+    return str(result or "")
+
+
+def _principal_group_ids(principal: object) -> tuple[str, ...]:
+    try:
+        values = getattr(principal, "group_ids", ())
+    except Exception:
+        return ()
+    return tuple(str(value) for value in values if str(value))
+
+
+def _actor_group_ids(
+    session: Session,
+    *,
+    principal: object,
+    tenant_id: str,
+    user_id: str,
+    include_admin_groups: bool,
+) -> tuple[str, ...]:
+    try:
+        values = user_group_ids(
+            session,
+            tenant_id=tenant_id,
+            user_id=user_id,
+            include_admin_groups=include_admin_groups,
+        )
+    except Exception:
+        return _principal_group_ids(principal)
+    return tuple(str(value) for value in values if str(value))
+
+
+def _campaign_visibility(
+    context: DocumentationContext,
+    *,
+    session: Session,
+    tenant_id: str,
+    user_id: str,
+    group_ids: tuple[str, ...],
+):
+    principal = context.principal
+    registry = context.registry
+    if not _has_all_scopes(principal, ("campaigns:campaign:read",)):
+        return None
+    try:
+        if not registry.has_capability(CAPABILITY_CAMPAIGNS_ACCESS):
+            return None
+        capability = registry.require_capability(CAPABILITY_CAMPAIGNS_ACCESS)
+    except Exception:
+        return None
+    if not isinstance(capability, CampaignAccessProvider):
+        return None
+
+    def campaign_visible(campaign_id: str) -> bool:
+        try:
+            return capability.campaign_exists(
+                session, tenant_id=tenant_id, campaign_id=campaign_id
+            ) and capability.can_read_campaign(
+                session,
+                tenant_id=tenant_id,
+                campaign_id=campaign_id,
+                user_id=user_id,
+                group_ids=group_ids,
+                tenant_admin=_has_all_scopes(principal, ("tenant:*",)),
+            )
+        except Exception:
+            return False
+
+    return campaign_visible

src/govoplan_files/backend/dsar_provider.py

@@ -0,0 +1,879 @@
+from __future__ import annotations
+
+from collections.abc import Sequence
+from datetime import datetime, timezone
+
+from sqlalchemy import inspect, or_
+from sqlalchemy.orm import Session
+
+from govoplan_core.core.dsar import (
+    DsarErasureActionRef,
+    DsarExecutionResultRef,
+    DsarRecordRef,
+    DsarSubjectRef,
+    dsar_capability_name,
+)
+from govoplan_files.backend.db.models import (
+    CampaignAttachmentUse,
+    FileAsset,
+    FileConnectorCredential,
+    FileConnectorPolicy,
+    FileConnectorProfile,
+    FileConnectorSpace,
+    FileFolder,
+    FileFormEvidenceGrant,
+    FileIntegrityFinding,
+    FileIntegrityScan,
+    FileShare,
+    FileVersion,
+)
+
+
+FILES_DSAR_CAPABILITY = dsar_capability_name("files")
+_MAX_RECORDS = 5_000
+
+
+class FilesDsarProvider:
+    provider_id = "files"
+    module_id = "files"
+
+    def search_subject(
+        self,
+        session: object,
+        *,
+        tenant_id: str,
+        subject: DsarSubjectRef,
+    ) -> Sequence[DsarRecordRef]:
+        db = _session(session)
+        subject_user_id = _subject_user_id(subject)
+        if subject_user_id is None:
+            return ()
+
+        records: list[DsarRecordRef] = []
+        form_evidence_available = _has_table(db, FileFormEvidenceGrant)
+        campaign_evidence_available = _has_table(db, CampaignAttachmentUse)
+        retention_reasons: dict[str, str | None] = {}
+
+        def retention_reason(asset: FileAsset) -> str | None:
+            if asset.id not in retention_reasons:
+                retention_reasons[asset.id] = _asset_retention_reason(
+                    db,
+                    asset,
+                    form_evidence_available=form_evidence_available,
+                    campaign_evidence_available=campaign_evidence_available,
+                )
+            return retention_reasons[asset.id]
+
+        def append(record: DsarRecordRef) -> None:
+            if len(records) >= _MAX_RECORDS:
+                raise ValueError(
+                    "Files DSAR match limit exceeded; narrow the subject selectors."
+                )
+            records.append(record)
+
+        assets = _bounded_rows(
+            db.query(FileAsset)
+            .filter(
+                FileAsset.tenant_id == tenant_id,
+                or_(
+                    FileAsset.owner_user_id == subject_user_id,
+                    FileAsset.created_by_user_id == subject_user_id,
+                ),
+            )
+            .order_by(FileAsset.id)
+        )
+        for asset in assets:
+            match_fields = _matching_fields(
+                asset,
+                subject_user_id,
+                ("owner_user_id", "created_by_user_id"),
+            )
+            asset_retention_reason = retention_reason(asset)
+            append(
+                _record(
+                    "file_asset",
+                    asset.id,
+                    "managed_file",
+                    asset.filename,
+                    {
+                        "match_fields": match_fields,
+                        "owner_type": asset.owner_type,
+                        "display_path": asset.display_path,
+                        "filename": asset.filename,
+                        "description": asset.description,
+                        "deleted_at": _iso(asset.deleted_at),
+                        "retained_until": _iso(asset.retained_until),
+                        "legal_hold": asset.legal_hold,
+                        "lifecycle_reason": asset.lifecycle_reason,
+                        "lifecycle_revision": asset.lifecycle_revision,
+                    },
+                    observed_at=asset.updated_at,
+                    immutable=asset_retention_reason is not None,
+                    retention_reason=asset_retention_reason,
+                    source_path=f"/files?file={asset.id}",
+                )
+            )
+
+        version_rows = _bounded_rows(
+            db.query(FileVersion, FileAsset)
+            .join(FileAsset, FileAsset.id == FileVersion.file_asset_id)
+            .filter(
+                FileVersion.tenant_id == tenant_id,
+                FileAsset.tenant_id == tenant_id,
+                or_(
+                    FileAsset.owner_user_id == subject_user_id,
+                    FileVersion.created_by_user_id == subject_user_id,
+                ),
+            )
+            .order_by(FileVersion.id)
+        )
+        for version, asset in version_rows:
+            asset_retention_reason = retention_reason(asset)
+            append(
+                _record(
+                    "file_version",
+                    version.id,
+                    "managed_file_version",
+                    version.filename_at_upload,
+                    {
+                        "match_fields": (
+                            ["asset.owner_user_id"]
+                            if asset.owner_user_id == subject_user_id
+                            else []
+                        )
+                        + (
+                            ["created_by_user_id"]
+                            if version.created_by_user_id == subject_user_id
+                            else []
+                        ),
+                        "file_asset_id": version.file_asset_id,
+                        "version_number": version.version_number,
+                        "filename_at_upload": version.filename_at_upload,
+                        "display_path_at_upload": version.display_path_at_upload,
+                        "content_type": version.content_type,
+                        "size_bytes": version.size_bytes,
+                        "checksum_sha256": version.checksum_sha256,
+                        "created_at": _iso(version.created_at),
+                    },
+                    observed_at=version.updated_at,
+                    immutable=asset_retention_reason is not None,
+                    retention_reason=asset_retention_reason,
+                    source_path=(
+                        f"/api/v1/files/{version.file_asset_id}/versions/"
+                        f"{version.id}/download"
+                    ),
+                )
+            )
+
+        for folder in _bounded_rows(
+            db.query(FileFolder)
+            .filter(
+                FileFolder.tenant_id == tenant_id,
+                or_(
+                    FileFolder.owner_user_id == subject_user_id,
+                    FileFolder.created_by_user_id == subject_user_id,
+                ),
+            )
+            .order_by(FileFolder.id)
+        ):
+            append(
+                _record(
+                    "file_folder",
+                    folder.id,
+                    "managed_folder",
+                    folder.path,
+                    {
+                        "match_fields": _matching_fields(
+                            folder,
+                            subject_user_id,
+                            ("owner_user_id", "created_by_user_id"),
+                        ),
+                        "owner_type": folder.owner_type,
+                        "path": folder.path,
+                        "deleted_at": _iso(folder.deleted_at),
+                    },
+                    observed_at=folder.updated_at,
+                    source_path="/files",
+                )
+            )
+
+        for share in _bounded_rows(
+            db.query(FileShare)
+            .filter(
+                FileShare.tenant_id == tenant_id,
+                or_(
+                    (FileShare.target_type == "user")
+                    & (FileShare.target_id == subject_user_id),
+                    FileShare.created_by_user_id == subject_user_id,
+                    FileShare.revoked_by_user_id == subject_user_id,
+                ),
+            )
+            .order_by(FileShare.id)
+        ):
+            target_matches = (
+                share.target_type == "user" and share.target_id == subject_user_id
+            )
+            match_fields = _matching_fields(
+                share,
+                subject_user_id,
+                ("created_by_user_id", "revoked_by_user_id"),
+            )
+            if target_matches:
+                match_fields.insert(0, "target_id")
+            append(
+                _record(
+                    "file_share",
+                    share.id,
+                    "file_access_evidence",
+                    f"Share for file {share.file_asset_id}",
+                    {
+                        "match_fields": match_fields,
+                        "file_asset_id": share.file_asset_id,
+                        "target_type": share.target_type,
+                        "target_is_subject": target_matches,
+                        "permission": share.permission,
+                        "expires_at": _iso(share.expires_at),
+                        "revoked_at": _iso(share.revoked_at),
+                    },
+                    observed_at=share.updated_at,
+                    immutable=True,
+                    retention_reason=(
+                        "File-sharing history is institutional access evidence."
+                    ),
+                    source_path=f"/files?file={share.file_asset_id}",
+                )
+            )
+
+        if form_evidence_available:
+            evidence_rows = _bounded_rows(
+                db.query(FileFormEvidenceGrant)
+                .outerjoin(
+                    FileAsset,
+                    FileAsset.id == FileFormEvidenceGrant.file_asset_id,
+                )
+                .filter(
+                    FileFormEvidenceGrant.tenant_id == tenant_id,
+                    or_(
+                        FileFormEvidenceGrant.custodian_user_id == subject_user_id,
+                        FileAsset.owner_user_id == subject_user_id,
+                    ),
+                )
+                .order_by(FileFormEvidenceGrant.id)
+            )
+            for grant in evidence_rows:
+                append(
+                    _record(
+                        "file_form_evidence",
+                        grant.id,
+                        "form_evidence",
+                        f"Form evidence {grant.form_definition_id}",
+                        {
+                            "match_fields": (
+                                ["custodian_user_id"]
+                                if grant.custodian_user_id == subject_user_id
+                                else ["asset.owner_user_id"]
+                            ),
+                            "form_instance_id": grant.form_instance_id,
+                            "form_definition_id": grant.form_definition_id,
+                            "form_definition_revision": grant.form_definition_revision,
+                            "evidence_kind": grant.evidence_kind,
+                            "purpose": grant.purpose,
+                            "status": grant.status,
+                            "expires_at": _iso(grant.expires_at),
+                            "file_asset_id": grant.file_asset_id,
+                            "file_version_id": grant.file_version_id,
+                        },
+                        observed_at=grant.updated_at,
+                        immutable=True,
+                        retention_reason=(
+                            "Submitted Form attachment evidence follows the owning "
+                            "process retention and cannot be erased through Files alone."
+                        ),
+                    )
+                )
+
+        if campaign_evidence_available:
+            campaign_rows = _bounded_rows(
+                db.query(CampaignAttachmentUse)
+                .join(FileAsset, FileAsset.id == CampaignAttachmentUse.file_asset_id)
+                .filter(
+                    CampaignAttachmentUse.tenant_id == tenant_id,
+                    FileAsset.owner_user_id == subject_user_id,
+                )
+                .order_by(CampaignAttachmentUse.id)
+            )
+            for use in campaign_rows:
+                append(
+                    _record(
+                        "campaign_attachment_use",
+                        use.id,
+                        "delivery_evidence",
+                        use.filename_used,
+                        {
+                            "match_fields": ["asset.owner_user_id"],
+                            "campaign_id": use.campaign_id,
+                            "campaign_version_id": use.campaign_version_id,
+                            "campaign_job_id": use.campaign_job_id,
+                            "file_asset_id": use.file_asset_id,
+                            "file_version_id": use.file_version_id,
+                            "filename_used": use.filename_used,
+                            "checksum_sha256": use.checksum_sha256,
+                            "size_bytes": use.size_bytes,
+                            "use_stage": use.use_stage,
+                            "used_at": _iso(use.used_at),
+                        },
+                        observed_at=use.updated_at,
+                        immutable=True,
+                        retention_reason=(
+                            "Campaign attachment use is immutable delivery evidence."
+                        ),
+                    )
+                )
+
+        self._append_configuration_references(
+            db,
+            append=append,
+            tenant_id=tenant_id,
+            subject_user_id=subject_user_id,
+        )
+        self._append_integrity_references(
+            db,
+            append=append,
+            tenant_id=tenant_id,
+            subject_user_id=subject_user_id,
+        )
+        return tuple(records)
+
+    def plan_erasure(
+        self,
+        session: object,
+        *,
+        tenant_id: str,
+        subject: DsarSubjectRef,
+        records: Sequence[DsarRecordRef],
+    ) -> Sequence[DsarErasureActionRef]:
+        del session
+        subject_user_id = _subject_user_id(subject)
+        if subject_user_id is None:
+            return ()
+        actions: list[DsarErasureActionRef] = []
+        for record in records:
+            if record.provider_id != self.provider_id or record.module_id != self.module_id:
+                raise ValueError("Files DSAR received a foreign provider record.")
+            match_fields = {
+                str(value) for value in record.data.get("match_fields", ())
+            }
+            if record.immutable_evidence:
+                actions.append(
+                    _action(
+                        f"files:retain:{record.resource_type}:{record.resource_id}",
+                        "retain",
+                        record,
+                        f"Retain {record.title}",
+                        record.retention_reason
+                        or "Institutional evidence must be retained.",
+                        executable=False,
+                    )
+                )
+            elif record.resource_type in {
+                "file_asset",
+                "file_version",
+                "file_folder",
+            }:
+                actions.append(
+                    _action(
+                        f"files:review:{record.resource_type}:{record.resource_id}",
+                        "manual_review",
+                        record,
+                        f"Review {record.title}",
+                        (
+                            "Managed file content, names, paths, ownership, and shared "
+                            "references require a case decision. Approved byte erasure "
+                            "must use the separate Files purge workflow."
+                        ),
+                        executable=False,
+                    )
+                )
+            if (
+                record.resource_type == "file_share"
+                and "target_id" in match_fields
+                and record.data.get("revoked_at") is None
+            ):
+                actions.append(
+                    _action(
+                        f"files:revoke:file_share:{record.resource_id}",
+                        "revoke",
+                        record,
+                        "Revoke active file share",
+                        "The active user-targeted share can be revoked without deleting file evidence.",
+                        executable=True,
+                        metadata={"subject_user_id": subject_user_id},
+                    )
+                )
+            for field_name in sorted(
+                match_fields.intersection(_detachable_fields(record.resource_type))
+            ):
+                actions.append(
+                    _action(
+                        (
+                            f"files:detach:{record.resource_type}:"
+                            f"{field_name}:{record.resource_id}"
+                        ),
+                        "detach",
+                        record,
+                        f"Detach {field_name.replace('_', ' ')}",
+                        (
+                            "Remove the mutable subject reference while preserving the "
+                            "governed resource and DSAR evidence."
+                        ),
+                        executable=True,
+                        metadata={
+                            "field": field_name,
+                            "subject_user_id": subject_user_id,
+                        },
+                    )
+                )
+        action_ids = [action.action_id for action in actions]
+        if len(action_ids) != len(set(action_ids)):
+            raise ValueError("Files DSAR produced duplicate action ids.")
+        return tuple(actions)
+
+    def execute_erasure(
+        self,
+        session: object,
+        *,
+        tenant_id: str,
+        subject: DsarSubjectRef,
+        actions: Sequence[DsarErasureActionRef],
+        request_id: str,
+    ) -> Sequence[DsarExecutionResultRef]:
+        db = _session(session)
+        subject_user_id = _subject_user_id(subject)
+        if subject_user_id is None:
+            return tuple(
+                _blocked(action, "Files requires a direct membership subject reference.")
+                for action in actions
+            )
+        results: list[DsarExecutionResultRef] = []
+        for action in actions:
+            if (
+                action.provider_id != self.provider_id
+                or action.module_id != self.module_id
+                or action.metadata.get("subject_user_id") != subject_user_id
+            ):
+                results.append(_blocked(action, "The Files DSAR action is stale or invalid."))
+                continue
+            if action.action_id.startswith("files:revoke:file_share:"):
+                results.append(
+                    _revoke_share(
+                        db,
+                        tenant_id=tenant_id,
+                        subject_user_id=subject_user_id,
+                        action=action,
+                        request_id=request_id,
+                    )
+                )
+            elif action.action_id.startswith("files:detach:"):
+                results.append(
+                    _detach_reference(
+                        db,
+                        tenant_id=tenant_id,
+                        subject_user_id=subject_user_id,
+                        action=action,
+                        request_id=request_id,
+                    )
+                )
+            else:
+                results.append(_blocked(action, "Files does not execute this action kind."))
+        db.flush()
+        return tuple(results)
+
+    def _append_configuration_references(
+        self,
+        db: Session,
+        *,
+        append: object,
+        tenant_id: str,
+        subject_user_id: str,
+    ) -> None:
+        configurations = (
+            (FileConnectorProfile, "connector_profile", ("created_by_user_id", "updated_by_user_id")),
+            (FileConnectorCredential, "connector_credential", ("created_by_user_id", "updated_by_user_id")),
+            (FileConnectorPolicy, "connector_policy", ("created_by_user_id", "updated_by_user_id")),
+            (FileConnectorSpace, "connector_space", ("owner_user_id", "created_by_user_id")),
+        )
+        for model, resource_type, fields in configurations:
+            if not _has_table(db, model):
+                continue
+            conditions = [getattr(model, field) == subject_user_id for field in fields]
+            query = db.query(model).filter(or_(*conditions))
+            if hasattr(model, "tenant_id"):
+                query = query.filter(model.tenant_id == tenant_id)
+            for row in _bounded_rows(query.order_by(model.id)):
+                match_fields = _matching_fields(row, subject_user_id, fields)
+                data: dict[str, object] = {
+                    "match_fields": match_fields,
+                    "label": getattr(row, "label", None),
+                    "provider": getattr(row, "provider", None),
+                }
+                if isinstance(row, FileConnectorCredential):
+                    data["credential_mode"] = row.credential_mode
+                elif isinstance(row, FileConnectorSpace):
+                    data.update(
+                        {
+                            "remote_path": row.remote_path,
+                            "sync_mode": row.sync_mode,
+                            "read_only": row.read_only,
+                            "deleted_at": _iso(row.deleted_at),
+                        }
+                    )
+                append(  # type: ignore[operator]
+                    _record(
+                        resource_type,
+                        row.id,
+                        "connector_configuration_evidence",
+                        getattr(row, "label", None) or resource_type.replace("_", " "),
+                        data,
+                        observed_at=row.updated_at,
+                        immutable=True,
+                        retention_reason=(
+                            "Connector configuration history is institutional evidence; "
+                            "credential secrets are excluded from the DSAR export."
+                        ),
+                    )
+                )
+
+    def _append_integrity_references(
+        self,
+        db: Session,
+        *,
+        append: object,
+        tenant_id: str,
+        subject_user_id: str,
+    ) -> None:
+        if _has_table(db, FileIntegrityScan):
+            for scan in _bounded_rows(
+                db.query(FileIntegrityScan)
+                .filter(
+                    FileIntegrityScan.tenant_id == tenant_id,
+                    FileIntegrityScan.created_by_user_id == subject_user_id,
+                )
+                .order_by(FileIntegrityScan.id)
+            ):
+                append(  # type: ignore[operator]
+                    _record(
+                        "file_integrity_scan",
+                        scan.id,
+                        "storage_integrity_evidence",
+                        f"Integrity scan {scan.id}",
+                        {
+                            "match_fields": ["created_by_user_id"],
+                            "storage_backend": scan.storage_backend,
+                            "status": scan.status,
+                            "started_at": _iso(scan.started_at),
+                            "completed_at": _iso(scan.completed_at),
+                        },
+                        observed_at=scan.updated_at,
+                        immutable=True,
+                        retention_reason="Storage integrity scans are operator evidence.",
+                    )
+                )
+        if _has_table(db, FileIntegrityFinding):
+            for finding in _bounded_rows(
+                db.query(FileIntegrityFinding)
+                .filter(
+                    FileIntegrityFinding.tenant_id == tenant_id,
+                    FileIntegrityFinding.resolved_by_user_id == subject_user_id,
+                )
+                .order_by(FileIntegrityFinding.id)
+            ):
+                append(  # type: ignore[operator]
+                    _record(
+                        "file_integrity_finding",
+                        finding.id,
+                        "storage_integrity_evidence",
+                        f"Integrity finding {finding.kind}",
+                        {
+                            "match_fields": ["resolved_by_user_id"],
+                            "kind": finding.kind,
+                            "state": finding.state,
+                            "resolved_at": _iso(finding.resolved_at),
+                        },
+                        observed_at=finding.updated_at,
+                        immutable=True,
+                        retention_reason="Integrity resolution is operator evidence.",
+                    )
+                )
+
+
+def _asset_retention_reason(
+    session: Session,
+    asset: FileAsset,
+    *,
+    form_evidence_available: bool,
+    campaign_evidence_available: bool,
+) -> str | None:
+    reasons: list[str] = []
+    if asset.legal_hold:
+        reasons.append("The file is under legal hold.")
+    retained_until = _aware(asset.retained_until)
+    if retained_until is not None and retained_until > datetime.now(timezone.utc):
+        reasons.append(f"The file is retained until {retained_until.isoformat()}.")
+    if form_evidence_available:
+        has_form_evidence = (
+            session.query(FileFormEvidenceGrant.id)
+            .filter(
+                FileFormEvidenceGrant.tenant_id == asset.tenant_id,
+                FileFormEvidenceGrant.file_asset_id == asset.id,
+            )
+            .first()
+            is not None
+        )
+        if has_form_evidence:
+            reasons.append("The file is referenced by submitted Form evidence.")
+    if campaign_evidence_available:
+        has_campaign_evidence = (
+            session.query(CampaignAttachmentUse.id)
+            .filter(
+                CampaignAttachmentUse.tenant_id == asset.tenant_id,
+                CampaignAttachmentUse.file_asset_id == asset.id,
+            )
+            .first()
+            is not None
+        )
+        if has_campaign_evidence:
+            reasons.append("The file is referenced by Campaign delivery evidence.")
+    return " ".join(reasons) or None
+
+
+_DETACHABLE_MODELS: dict[str, tuple[type[object], frozenset[str]]] = {
+    "file_asset": (FileAsset, frozenset({"created_by_user_id"})),
+    "file_version": (FileVersion, frozenset({"created_by_user_id"})),
+    "file_folder": (FileFolder, frozenset({"created_by_user_id"})),
+    "file_share": (
+        FileShare,
+        frozenset({"created_by_user_id", "revoked_by_user_id"}),
+    ),
+    "connector_profile": (
+        FileConnectorProfile,
+        frozenset({"created_by_user_id", "updated_by_user_id"}),
+    ),
+    "connector_credential": (
+        FileConnectorCredential,
+        frozenset({"created_by_user_id", "updated_by_user_id"}),
+    ),
+    "connector_policy": (
+        FileConnectorPolicy,
+        frozenset({"created_by_user_id", "updated_by_user_id"}),
+    ),
+    "connector_space": (FileConnectorSpace, frozenset({"created_by_user_id"})),
+}
+
+
+def _detachable_fields(resource_type: str) -> frozenset[str]:
+    entry = _DETACHABLE_MODELS.get(resource_type)
+    return entry[1] if entry is not None else frozenset()
+
+
+def _revoke_share(
+    session: Session,
+    *,
+    tenant_id: str,
+    subject_user_id: str,
+    action: DsarErasureActionRef,
+    request_id: str,
+) -> DsarExecutionResultRef:
+    row = (
+        session.query(FileShare)
+        .filter(FileShare.id == action.resource_id)
+        .with_for_update()
+        .one_or_none()
+    )
+    if (
+        row is None
+        or row.tenant_id != tenant_id
+        or row.target_type != "user"
+        or row.target_id != subject_user_id
+    ):
+        return _blocked(action, "The subject-targeted file share is no longer available.")
+    if row.revoked_at is not None:
+        return _result(
+            action,
+            "unchanged",
+            "The file share was already revoked.",
+            {"request_id": request_id, "revoked_at": _iso(row.revoked_at)},
+        )
+    row.revoked_at = datetime.now(timezone.utc)
+    row.revoked_by_user_id = None
+    return _result(
+        action,
+        "executed",
+        "The subject-targeted file share was revoked.",
+        {"request_id": request_id, "revoked_at": _iso(row.revoked_at)},
+    )
+
+
+def _detach_reference(
+    session: Session,
+    *,
+    tenant_id: str,
+    subject_user_id: str,
+    action: DsarErasureActionRef,
+    request_id: str,
+) -> DsarExecutionResultRef:
+    entry = _DETACHABLE_MODELS.get(action.resource_type)
+    field_name = str(action.metadata.get("field") or "")
+    if entry is None or field_name not in entry[1]:
+        return _blocked(action, "The requested Files subject reference is not detachable.")
+    model = entry[0]
+    row = (
+        session.query(model)
+        .filter(getattr(model, "id") == action.resource_id)
+        .with_for_update()
+        .one_or_none()
+    )
+    if row is None or getattr(row, "tenant_id", None) != tenant_id:
+        return _blocked(action, "The Files resource is no longer available.")
+    current = getattr(row, field_name)
+    if current is None:
+        return _result(
+            action,
+            "unchanged",
+            "The subject reference was already detached.",
+            {"request_id": request_id, "field": field_name},
+        )
+    if current != subject_user_id:
+        return _blocked(action, "The Files subject reference changed after planning.")
+    setattr(row, field_name, None)
+    return _result(
+        action,
+        "executed",
+        "The mutable subject reference was detached.",
+        {"request_id": request_id, "field": field_name},
+    )
+
+
+def _subject_user_id(subject: DsarSubjectRef) -> str | None:
+    candidates: list[str] = []
+    if subject.membership_id:
+        candidates.append(subject.membership_id)
+    for key, value in subject.external_references.items():
+        if key in {
+            "files.user",
+            "files.membership",
+            "access.membership",
+            "membership_id",
+        }:
+            candidates.append(value)
+    normalized = {value.strip() for value in candidates if value.strip()}
+    if len(normalized) != 1:
+        return None
+    return normalized.pop()
+
+
+def _matching_fields(
+    row: object,
+    subject_user_id: str,
+    fields: Sequence[str],
+) -> list[str]:
+    return [field for field in fields if getattr(row, field) == subject_user_id]
+
+
+def _record(
+    resource_type: str,
+    resource_id: str,
+    category: str,
+    title: str,
+    data: dict[str, object],
+    *,
+    observed_at: datetime | None = None,
+    immutable: bool = False,
+    retention_reason: str | None = None,
+    source_path: str | None = None,
+) -> DsarRecordRef:
+    return DsarRecordRef(
+        provider_id="files",
+        module_id="files",
+        resource_type=resource_type,
+        resource_id=resource_id,
+        category=category,
+        title=title,
+        data=data,
+        observed_at=observed_at,
+        immutable_evidence=immutable,
+        retention_reason=retention_reason,
+        source_path=source_path,
+    )
+
+
+def _action(
+    action_id: str,
+    kind: str,
+    record: DsarRecordRef,
+    title: str,
+    rationale: str,
+    *,
+    executable: bool,
+    metadata: dict[str, object] | None = None,
+) -> DsarErasureActionRef:
+    return DsarErasureActionRef(
+        action_id=action_id,
+        provider_id="files",
+        module_id="files",
+        kind=kind,  # type: ignore[arg-type]
+        resource_type=record.resource_type,
+        resource_id=record.resource_id,
+        title=title,
+        rationale=rationale,
+        executable=executable,
+        metadata=metadata or {},
+    )
+
+
+def _result(
+    action: DsarErasureActionRef,
+    status: str,
+    summary: str,
+    evidence: dict[str, object] | None = None,
+) -> DsarExecutionResultRef:
+    return DsarExecutionResultRef(
+        action_id=action.action_id,
+        status=status,  # type: ignore[arg-type]
+        summary=summary,
+        evidence=evidence or {},
+    )
+
+
+def _blocked(action: DsarErasureActionRef, summary: str) -> DsarExecutionResultRef:
+    return _result(action, "blocked", summary)
+
+
+def _session(value: object) -> Session:
+    if not isinstance(value, Session):
+        raise TypeError("Files DSAR provider requires a SQLAlchemy session.")
+    return value
+
+
+def _bounded_rows(query: object) -> list[object]:
+    rows = query.limit(_MAX_RECORDS + 1).all()  # type: ignore[attr-defined]
+    if len(rows) > _MAX_RECORDS:
+        raise ValueError("Files DSAR match limit exceeded; narrow the subject selectors.")
+    return rows
+
+
+def _has_table(session: Session, model: type[object]) -> bool:
+    return inspect(session.connection()).has_table(model.__tablename__)
+
+
+def _aware(value: datetime | None) -> datetime | None:
+    if value is None or value.tzinfo is not None:
+        return value
+    return value.replace(tzinfo=timezone.utc)
+
+
+def _iso(value: datetime | None) -> str | None:
+    aware = _aware(value)
+    return aware.isoformat() if aware else None
+
+
+__all__ = ["FILES_DSAR_CAPABILITY", "FilesDsarProvider"]

src/govoplan_files/backend/form_evidence.py

@@ -0,0 +1,449 @@
+from __future__ import annotations
+
+from collections.abc import Mapping, Sequence
+from datetime import UTC, datetime, timedelta
+import hashlib
+import json
+import secrets
+
+from sqlalchemy.orm import Session
+
+from govoplan_core.core.access import CAPABILITY_ACCESS_DIRECTORY, AccessDirectory
+from govoplan_core.core.form_evidence import (
+    FormEvidenceContractError,
+    FormEvidenceGrant,
+    FormEvidenceGrantRequest,
+    FormEvidenceInspection,
+    FormEvidenceInspectionRequest,
+    FormEvidenceState,
+)
+from govoplan_core.core.institutional import EvidenceReference
+from govoplan_core.core.modules import ModuleContext
+from govoplan_files.backend.db.models import (
+    FileAsset,
+    FileBlob,
+    FileFormEvidenceGrant,
+    FileVersion,
+)
+from govoplan_files.backend.runtime import configure_runtime
+
+
+PROVIDER_ID = "files"
+CAPABILITY_FORM_EVIDENCE_FILES = "forms_runtime.evidence.files"
+MAX_GRANT_TTL = timedelta(minutes=15)
+
+
+class FilesFormEvidenceProvider:
+    provider_id = PROVIDER_ID
+
+    def __init__(self, registry: object | None, settings: object) -> None:
+        self._registry = registry
+        self._settings = settings
+
+    def supported_kinds(self) -> Sequence[str]:
+        return ("document",)
+
+    def create_upload_grant(
+        self,
+        session: object,
+        principal: object,
+        *,
+        request: FormEvidenceGrantRequest,
+    ) -> FormEvidenceGrant:
+        db = _session(session)
+        _assert_tenant(principal, request.tenant_id)
+        if request.evidence_kind != "document":
+            raise FormEvidenceContractError(
+                "Files can accept only document evidence for Forms Runtime."
+            )
+        custodian_user_id = _custodian_user_id(request.custodian_ref)
+        self._assert_active_custodian(
+            tenant_id=request.tenant_id,
+            user_id=custodian_user_id,
+        )
+        now = datetime.now(UTC)
+        if request.expires_at <= now:
+            raise FormEvidenceContractError(
+                "Form evidence upload grant expiry must be in the future."
+            )
+        allowed_content_types = _content_types(request.allowed_content_types)
+        configured_max = int(getattr(self._settings, "file_upload_max_bytes"))
+        max_size_bytes = min(request.max_size_bytes or configured_max, configured_max)
+        request_sha256 = _request_sha256(
+            request,
+            custodian_user_id=custodian_user_id,
+            max_size_bytes=max_size_bytes,
+            allowed_content_types=allowed_content_types,
+        )
+        existing = (
+            db.query(FileFormEvidenceGrant)
+            .filter(
+                FileFormEvidenceGrant.tenant_id == request.tenant_id,
+                FileFormEvidenceGrant.idempotency_key == request.idempotency_key,
+            )
+            .one_or_none()
+        )
+        if existing is not None:
+            if not secrets.compare_digest(existing.request_sha256, request_sha256):
+                raise FormEvidenceContractError(
+                    "Form evidence grant idempotency conflict."
+                )
+            if (
+                existing.status in {"expired", "revoked"}
+                or _aware(existing.expires_at) <= now
+            ):
+                raise FormEvidenceContractError(
+                    "The existing Form evidence upload grant is no longer usable; "
+                    "request a new grant with a new idempotency key."
+                )
+            return _grant_response(existing, upload_token=None, replayed=True)
+
+        metadata = _bounded_metadata(request.metadata)
+        remaining_attachments = metadata.get("remaining_attachments")
+        if isinstance(remaining_attachments, int):
+            existing_attachment_ids = set(metadata.get("existing_attachment_ids", ()))
+            active_grants = (
+                db.query(FileFormEvidenceGrant)
+                .filter(
+                    FileFormEvidenceGrant.tenant_id == request.tenant_id,
+                    FileFormEvidenceGrant.form_instance_id == request.instance_id,
+                    FileFormEvidenceGrant.form_definition_id
+                    == request.definition_ref.object_id,
+                    FileFormEvidenceGrant.form_definition_revision
+                    == str(request.definition_ref.version),
+                    FileFormEvidenceGrant.status.in_(("issued", "uploaded")),
+                    FileFormEvidenceGrant.expires_at > now,
+                )
+                .with_for_update()
+                .all()
+            )
+            outstanding = sum(
+                1
+                for item in active_grants
+                if not item.file_asset_id
+                or item.file_asset_id not in existing_attachment_ids
+            )
+            if outstanding >= remaining_attachments:
+                raise FormEvidenceContractError(
+                    "This Form already has the maximum number of active attachment uploads."
+                )
+
+        upload_token = secrets.token_urlsafe(32)
+        grant = FileFormEvidenceGrant(
+            tenant_id=request.tenant_id,
+            form_instance_id=request.instance_id,
+            form_definition_id=request.definition_ref.object_id,
+            form_definition_revision=str(request.definition_ref.version),
+            token_sha256=_token_sha256(upload_token),
+            idempotency_key=request.idempotency_key,
+            request_sha256=request_sha256,
+            custodian_user_id=custodian_user_id,
+            evidence_kind=request.evidence_kind,
+            purpose=request.purpose,
+            status="issued",
+            expires_at=min(request.expires_at, now + MAX_GRANT_TTL),
+            max_size_bytes=max_size_bytes,
+            allowed_content_types=list(allowed_content_types),
+            metadata_=metadata,
+        )
+        db.add(grant)
+        db.flush()
+        return _grant_response(grant, upload_token=upload_token, replayed=False)
+
+    def inspect_evidence(
+        self,
+        session: object,
+        principal: object,
+        *,
+        request: FormEvidenceInspectionRequest,
+    ) -> FormEvidenceInspection:
+        db = _session(session)
+        _assert_tenant(principal, request.tenant_id)
+        now = datetime.now(UTC)
+        if request.evidence.owner_module != PROVIDER_ID:
+            return _inspection(
+                request.evidence,
+                state="rejected",
+                observed_at=now,
+                reason="The evidence owner does not match the Files provider.",
+            )
+        if request.evidence.kind != "document" or not request.evidence.version:
+            return _inspection(
+                request.evidence,
+                state="rejected",
+                observed_at=now,
+                reason="Files evidence requires an exact document version.",
+            )
+        grant = (
+            db.query(FileFormEvidenceGrant)
+            .filter(
+                FileFormEvidenceGrant.tenant_id == request.tenant_id,
+                FileFormEvidenceGrant.form_instance_id == request.instance_id,
+                FileFormEvidenceGrant.form_definition_id
+                == request.definition_ref.object_id,
+                FileFormEvidenceGrant.form_definition_revision
+                == str(request.definition_ref.version),
+                FileFormEvidenceGrant.file_asset_id == request.evidence.evidence_id,
+                FileFormEvidenceGrant.file_version_id == request.evidence.version,
+            )
+            .one_or_none()
+        )
+        if grant is None:
+            return _inspection(
+                request.evidence,
+                state="rejected",
+                observed_at=now,
+                reason="The document was not captured for this exact Form submission.",
+            )
+        if grant.status == "revoked":
+            return _inspection(
+                request.evidence,
+                state="revoked",
+                observed_at=now,
+                reason="The Form evidence grant was revoked.",
+            )
+        if grant.status != "uploaded":
+            return _inspection(
+                request.evidence,
+                state="pending",
+                observed_at=now,
+                retryable=True,
+                reason="The Form evidence upload has not completed.",
+            )
+        asset = db.get(FileAsset, grant.file_asset_id)
+        version = db.get(FileVersion, grant.file_version_id)
+        blob = db.get(FileBlob, version.blob_id) if version is not None else None
+        if asset is None or version is None or blob is None:
+            return _inspection(
+                request.evidence,
+                state="unavailable",
+                observed_at=now,
+                retryable=True,
+                reason="The managed document cannot currently be reconstructed.",
+            )
+        if (
+            asset.tenant_id != request.tenant_id
+            or version.tenant_id != request.tenant_id
+            or blob.tenant_id != request.tenant_id
+            or version.file_asset_id != asset.id
+        ):
+            return _inspection(
+                request.evidence,
+                state="rejected",
+                observed_at=now,
+                reason="The managed document crosses an evidence ownership boundary.",
+            )
+        if asset.deleted_at is not None:
+            return _inspection(
+                request.evidence,
+                state="revoked",
+                observed_at=now,
+                reason="The managed document is no longer active.",
+            )
+        if blob.quarantined_at is not None or blob.integrity_status == "quarantined":
+            return _inspection(
+                request.evidence,
+                state="rejected",
+                observed_at=now,
+                reason="The managed document failed its integrity gate.",
+            )
+        if blob.integrity_status != "verified":
+            return _inspection(
+                request.evidence,
+                state="pending",
+                observed_at=now,
+                retryable=True,
+                reason="The managed document is awaiting integrity verification.",
+            )
+        if (
+            not request.evidence.checksum
+            or not secrets.compare_digest(
+                request.evidence.checksum,
+                version.checksum_sha256,
+            )
+            or not secrets.compare_digest(
+                version.checksum_sha256,
+                blob.checksum_sha256,
+            )
+        ):
+            return _inspection(
+                request.evidence,
+                state="rejected",
+                observed_at=now,
+                reason="The managed document checksum does not match the evidence.",
+            )
+        return _inspection(
+            request.evidence,
+            state="accepted",
+            observed_at=now,
+            metadata={
+                "content_type": version.content_type,
+                "size_bytes": version.size_bytes,
+                "integrity_status": blob.integrity_status,
+                "grant_id": grant.id,
+            },
+        )
+
+    def _assert_active_custodian(self, *, tenant_id: str, user_id: str) -> None:
+        registry = self._registry
+        if registry is None or not hasattr(registry, "has_capability"):
+            raise FormEvidenceContractError(
+                "The Access directory is unavailable for Form evidence custody."
+            )
+        if not registry.has_capability(CAPABILITY_ACCESS_DIRECTORY):
+            raise FormEvidenceContractError(
+                "The Access directory is unavailable for Form evidence custody."
+            )
+        directory = registry.require_capability(CAPABILITY_ACCESS_DIRECTORY)
+        if not isinstance(directory, AccessDirectory):
+            raise FormEvidenceContractError(
+                "The Access directory capability is invalid."
+            )
+        user = directory.get_user(user_id)
+        if user is None or user.tenant_id != tenant_id or user.status != "active":
+            raise FormEvidenceContractError(
+                "Form evidence requires an active same-tenant custodian."
+            )
+
+
+def create_files_form_evidence_provider(
+    context: ModuleContext,
+) -> FilesFormEvidenceProvider:
+    configure_runtime(registry=context.registry, settings=context.settings)
+    return FilesFormEvidenceProvider(context.registry, context.settings)
+
+
+def _grant_response(
+    grant: FileFormEvidenceGrant,
+    *,
+    upload_token: str | None,
+    replayed: bool,
+) -> FormEvidenceGrant:
+    return FormEvidenceGrant(
+        provider_id=PROVIDER_ID,
+        grant_id=grant.id,
+        upload_token=upload_token,
+        upload_url="/api/v1/files/form-evidence/upload",
+        expires_at=_aware(grant.expires_at),
+        max_size_bytes=grant.max_size_bytes,
+        allowed_content_types=tuple(grant.allowed_content_types),
+        replayed=replayed,
+    )
+
+
+def _inspection(
+    reference: EvidenceReference,
+    *,
+    state: FormEvidenceState,
+    observed_at: datetime,
+    retryable: bool = False,
+    reason: str | None = None,
+    metadata: Mapping[str, object] | None = None,
+) -> FormEvidenceInspection:
+    return FormEvidenceInspection(
+        provider_id=PROVIDER_ID,
+        reference=reference,
+        state=state,
+        observed_at=observed_at,
+        retryable=retryable,
+        reason=reason,
+        metadata=dict(metadata or {}),
+    )
+
+
+def _session(value: object) -> Session:
+    if not isinstance(value, Session):
+        raise TypeError("Files Form evidence requires a SQLAlchemy session.")
+    return value
+
+
+def _assert_tenant(principal: object, tenant_id: str) -> None:
+    principal_tenant = str(getattr(principal, "tenant_id", "") or "").strip()
+    if not principal_tenant or principal_tenant != tenant_id:
+        raise PermissionError("Form evidence cannot cross tenants.")
+
+
+def _custodian_user_id(value: str | None) -> str:
+    clean = str(value or "").strip()
+    if not clean.startswith("user:") or len(clean) <= len("user:"):
+        raise FormEvidenceContractError(
+            "Files Form evidence requires a user custodian."
+        )
+    return clean.removeprefix("user:")
+
+
+def _content_types(values: Sequence[str]) -> tuple[str, ...]:
+    cleaned = tuple(
+        dict.fromkeys(
+            value.split(";", 1)[0].strip().casefold()
+            for value in values
+            if value.strip()
+        )
+    )
+    if len(cleaned) > 50 or any(len(value) > 255 for value in cleaned):
+        raise FormEvidenceContractError(
+            "Form evidence content-type restrictions are too large."
+        )
+    return cleaned
+
+
+def _bounded_metadata(value: Mapping[str, object]) -> dict[str, object]:
+    remaining = value.get("remaining_attachments")
+    result: dict[str, object] = {}
+    if isinstance(remaining, int) and remaining >= 0:
+        result["remaining_attachments"] = remaining
+    raw_ids = value.get("existing_attachment_ids")
+    if isinstance(raw_ids, (list, tuple)):
+        clean_ids = tuple(
+            dict.fromkeys(
+                item.strip()
+                for item in raw_ids
+                if isinstance(item, str) and item.strip() and len(item.strip()) <= 255
+            )
+        )
+        if len(clean_ids) <= 1000:
+            result["existing_attachment_ids"] = clean_ids
+    return result
+
+
+def _request_sha256(
+    request: FormEvidenceGrantRequest,
+    *,
+    custodian_user_id: str,
+    max_size_bytes: int,
+    allowed_content_types: Sequence[str],
+) -> str:
+    return hashlib.sha256(
+        json.dumps(
+            {
+                "tenant_id": request.tenant_id,
+                "instance_id": request.instance_id,
+                "definition_ref": request.definition_ref.to_dict(),
+                "evidence_kind": request.evidence_kind,
+                "purpose": request.purpose,
+                "expires_at": request.expires_at.isoformat(),
+                "custodian_user_id": custodian_user_id,
+                "max_size_bytes": max_size_bytes,
+                "allowed_content_types": list(allowed_content_types),
+                "metadata": _bounded_metadata(request.metadata),
+            },
+            sort_keys=True,
+            separators=(",", ":"),
+        ).encode("utf-8")
+    ).hexdigest()
+
+
+def _token_sha256(token: str) -> str:
+    return hashlib.sha256(token.encode("utf-8")).hexdigest()
+
+
+def _aware(value: datetime) -> datetime:
+    return value if value.tzinfo is not None else value.replace(tzinfo=UTC)
+
+
+__all__ = [
+    "CAPABILITY_FORM_EVIDENCE_FILES",
+    "FilesFormEvidenceProvider",
+    "PROVIDER_ID",
+    "create_files_form_evidence_provider",
+]

src/govoplan_files/backend/migrations/dev_versions/4f5a6b7c8d9e_file_connector_spaces.py

@@ -0,0 +1,119 @@
+"""file connector spaces
+
+Revision ID: 4f5a6b7c8d9e
+Revises: 2e3f4a5b6c7d
+Create Date: 2026-07-08 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "4f5a6b7c8d9e"
+down_revision = "2e3f4a5b6c7d"
+branch_labels = None
+depends_on = None
+
+
+def _scope_fk_target(tables: set[str]) -> str:
+    return "core_scopes.id" if "core_scopes" in tables else "tenancy_tenants.id"
+
+
+def upgrade() -> None:
+    inspector = sa.inspect(op.get_bind())
+    tables = set(inspector.get_table_names())
+    scope_fk_target = _scope_fk_target(tables)
+    if "file_connector_spaces" not in tables:
+        op.create_table(
+            "file_connector_spaces",
+            sa.Column("id", sa.String(length=36), nullable=False),
+            sa.Column("tenant_id", sa.String(length=36), nullable=False),
+            sa.Column("owner_type", sa.String(length=20), nullable=False),
+            sa.Column("owner_user_id", sa.String(length=36), nullable=True),
+            sa.Column("owner_group_id", sa.String(length=36), nullable=True),
+            sa.Column("label", sa.String(length=255), nullable=False),
+            sa.Column("connector_profile_id", sa.String(length=255), nullable=False),
+            sa.Column("provider", sa.String(length=50), nullable=False),
+            sa.Column("library_id", sa.String(length=255), nullable=True),
+            sa.Column("remote_path", sa.String(length=1000), nullable=False),
+            sa.Column("sync_mode", sa.String(length=30), nullable=False),
+            sa.Column("read_only", sa.Boolean(), nullable=False),
+            sa.Column("is_active", sa.Boolean(), nullable=False),
+            sa.Column("created_by_user_id", sa.String(length=36), nullable=True),
+            sa.Column("deleted_at", sa.DateTime(timezone=True), nullable=True),
+            sa.Column("metadata", sa.JSON(), nullable=True),
+            sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+            sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+            sa.ForeignKeyConstraint(["created_by_user_id"], ["access_users.id"], name=op.f("fk_file_connector_spaces_created_by_user_id_users"), ondelete="SET NULL"),
+            sa.ForeignKeyConstraint(["owner_group_id"], ["access_groups.id"], name=op.f("fk_file_connector_spaces_owner_group_id_groups"), ondelete="SET NULL"),
+            sa.ForeignKeyConstraint(["owner_user_id"], ["access_users.id"], name=op.f("fk_file_connector_spaces_owner_user_id_users"), ondelete="SET NULL"),
+            sa.ForeignKeyConstraint(["tenant_id"], [scope_fk_target], name=op.f("fk_file_connector_spaces_tenant_id_scopes"), ondelete="CASCADE"),
+            sa.PrimaryKeyConstraint("id", name=op.f("pk_file_connector_spaces")),
+        )
+
+    inspector = sa.inspect(op.get_bind())
+    indexes = {item["name"] for item in inspector.get_indexes("file_connector_spaces")}
+    for column in (
+        "tenant_id",
+        "owner_type",
+        "owner_user_id",
+        "owner_group_id",
+        "connector_profile_id",
+        "provider",
+        "is_active",
+        "created_by_user_id",
+        "deleted_at",
+    ):
+        name = op.f(f"ix_file_connector_spaces_{column}")
+        if name not in indexes:
+            op.create_index(name, "file_connector_spaces", [column], unique=False)
+    if "ix_file_connector_spaces_owner" not in indexes:
+        op.create_index(
+            "ix_file_connector_spaces_owner",
+            "file_connector_spaces",
+            ["tenant_id", "owner_type", "owner_user_id", "owner_group_id"],
+            unique=False,
+        )
+    if "uq_file_connector_spaces_active_user_label" not in indexes:
+        op.create_index(
+            "uq_file_connector_spaces_active_user_label",
+            "file_connector_spaces",
+            ["tenant_id", "owner_user_id", "label"],
+            unique=True,
+            sqlite_where=sa.text("owner_type = 'user' AND deleted_at IS NULL"),
+            postgresql_where=sa.text("owner_type = 'user' AND deleted_at IS NULL"),
+        )
+    if "uq_file_connector_spaces_active_group_label" not in indexes:
+        op.create_index(
+            "uq_file_connector_spaces_active_group_label",
+            "file_connector_spaces",
+            ["tenant_id", "owner_group_id", "label"],
+            unique=True,
+            sqlite_where=sa.text("owner_type = 'group' AND deleted_at IS NULL"),
+            postgresql_where=sa.text("owner_type = 'group' AND deleted_at IS NULL"),
+        )
+
+
+def downgrade() -> None:
+    inspector = sa.inspect(op.get_bind())
+    if "file_connector_spaces" not in inspector.get_table_names():
+        return
+    indexes = {item["name"] for item in inspector.get_indexes("file_connector_spaces")}
+    for name in (
+        "uq_file_connector_spaces_active_group_label",
+        "uq_file_connector_spaces_active_user_label",
+        "ix_file_connector_spaces_owner",
+        op.f("ix_file_connector_spaces_deleted_at"),
+        op.f("ix_file_connector_spaces_created_by_user_id"),
+        op.f("ix_file_connector_spaces_is_active"),
+        op.f("ix_file_connector_spaces_provider"),
+        op.f("ix_file_connector_spaces_connector_profile_id"),
+        op.f("ix_file_connector_spaces_owner_group_id"),
+        op.f("ix_file_connector_spaces_owner_user_id"),
+        op.f("ix_file_connector_spaces_owner_type"),
+        op.f("ix_file_connector_spaces_tenant_id"),
+    ):
+        if name in indexes:
+            op.drop_index(name, table_name="file_connector_spaces")
+    op.drop_table("file_connector_spaces")

src/govoplan_files/backend/migrations/dev_versions/5a6b7c8d9e0f_file_connector_profiles.py

@@ -0,0 +1,94 @@
+"""file connector profiles
+
+Revision ID: 5a6b7c8d9e0f
+Revises: 4f5a6b7c8d9e
+Create Date: 2026-07-08 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "5a6b7c8d9e0f"
+down_revision = "4f5a6b7c8d9e"
+branch_labels = None
+depends_on = None
+
+
+def _scope_fk_target(inspector) -> str:
+    tables = set(inspector.get_table_names())
+    return "core_scopes.id" if "core_scopes" in tables else "tenancy_tenants.id"
+
+
+def upgrade() -> None:
+    inspector = sa.inspect(op.get_bind())
+    scope_fk_target = _scope_fk_target(inspector)
+    if "file_connector_profiles" not in inspector.get_table_names():
+        op.create_table(
+            "file_connector_profiles",
+            sa.Column("id", sa.String(length=255), nullable=False),
+            sa.Column("tenant_id", sa.String(length=36), nullable=True),
+            sa.Column("scope_type", sa.String(length=20), nullable=False),
+            sa.Column("scope_id", sa.String(length=36), nullable=True),
+            sa.Column("label", sa.String(length=255), nullable=False),
+            sa.Column("provider", sa.String(length=50), nullable=False),
+            sa.Column("endpoint_url", sa.String(length=1000), nullable=True),
+            sa.Column("base_path", sa.String(length=1000), nullable=True),
+            sa.Column("enabled", sa.Boolean(), nullable=False),
+            sa.Column("credential_mode", sa.String(length=30), nullable=False),
+            sa.Column("username", sa.String(length=320), nullable=True),
+            sa.Column("password_encrypted", sa.Text(), nullable=True),
+            sa.Column("token_encrypted", sa.Text(), nullable=True),
+            sa.Column("password_env", sa.String(length=255), nullable=True),
+            sa.Column("token_env", sa.String(length=255), nullable=True),
+            sa.Column("secret_ref", sa.String(length=1000), nullable=True),
+            sa.Column("capabilities", sa.JSON(), nullable=True),
+            sa.Column("policy", sa.JSON(), nullable=True),
+            sa.Column("metadata", sa.JSON(), nullable=True),
+            sa.Column("created_by_user_id", sa.String(length=36), nullable=True),
+            sa.Column("updated_by_user_id", sa.String(length=36), nullable=True),
+            sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+            sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+            sa.ForeignKeyConstraint(["created_by_user_id"], ["access_users.id"], name=op.f("fk_file_connector_profiles_created_by_user_id_users"), ondelete="SET NULL"),
+            sa.ForeignKeyConstraint(["tenant_id"], [scope_fk_target], name=op.f("fk_file_connector_profiles_tenant_id_scopes"), ondelete="CASCADE"),
+            sa.ForeignKeyConstraint(["updated_by_user_id"], ["access_users.id"], name=op.f("fk_file_connector_profiles_updated_by_user_id_users"), ondelete="SET NULL"),
+            sa.PrimaryKeyConstraint("id", name=op.f("pk_file_connector_profiles")),
+        )
+
+    inspector = sa.inspect(op.get_bind())
+    indexes = {item["name"] for item in inspector.get_indexes("file_connector_profiles")}
+    for column in (
+        "tenant_id",
+        "scope_type",
+        "scope_id",
+        "provider",
+        "enabled",
+        "created_by_user_id",
+        "updated_by_user_id",
+    ):
+        name = op.f(f"ix_file_connector_profiles_{column}")
+        if name not in indexes:
+            op.create_index(name, "file_connector_profiles", [column], unique=False)
+    if "ix_file_connector_profiles_scope" not in indexes:
+        op.create_index("ix_file_connector_profiles_scope", "file_connector_profiles", ["scope_type", "scope_id"], unique=False)
+
+
+def downgrade() -> None:
+    inspector = sa.inspect(op.get_bind())
+    if "file_connector_profiles" not in inspector.get_table_names():
+        return
+    indexes = {item["name"] for item in inspector.get_indexes("file_connector_profiles")}
+    for name in (
+        "ix_file_connector_profiles_scope",
+        op.f("ix_file_connector_profiles_updated_by_user_id"),
+        op.f("ix_file_connector_profiles_created_by_user_id"),
+        op.f("ix_file_connector_profiles_enabled"),
+        op.f("ix_file_connector_profiles_provider"),
+        op.f("ix_file_connector_profiles_scope_id"),
+        op.f("ix_file_connector_profiles_scope_type"),
+        op.f("ix_file_connector_profiles_tenant_id"),
+    ):
+        if name in indexes:
+            op.drop_index(name, table_name="file_connector_profiles")
+    op.drop_table("file_connector_profiles")

src/govoplan_files/backend/migrations/dev_versions/6b7c8d9e0f1a_file_connector_credentials.py

@@ -0,0 +1,111 @@
+"""file connector credentials
+
+Revision ID: 6b7c8d9e0f1a
+Revises: 5a6b7c8d9e0f
+Create Date: 2026-07-08 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "6b7c8d9e0f1a"
+down_revision = "5a6b7c8d9e0f"
+branch_labels = None
+depends_on = None
+
+
+def _scope_fk_target(table_names: set[str]) -> str:
+    return "core_scopes.id" if "core_scopes" in table_names else "tenancy_tenants.id"
+
+
+def upgrade() -> None:
+    inspector = sa.inspect(op.get_bind())
+    table_names = set(inspector.get_table_names())
+    scope_fk_target = _scope_fk_target(table_names)
+
+    if "file_connector_profiles" in table_names:
+        columns = {item["name"] for item in inspector.get_columns("file_connector_profiles")}
+        if "credential_profile_id" not in columns:
+            op.add_column("file_connector_profiles", sa.Column("credential_profile_id", sa.String(length=255), nullable=True))
+        indexes = {item["name"] for item in inspector.get_indexes("file_connector_profiles")}
+        index_name = op.f("ix_file_connector_profiles_credential_profile_id")
+        if index_name not in indexes:
+            op.create_index(index_name, "file_connector_profiles", ["credential_profile_id"], unique=False)
+
+    if "file_connector_credentials" not in table_names:
+        op.create_table(
+            "file_connector_credentials",
+            sa.Column("id", sa.String(length=255), nullable=False),
+            sa.Column("tenant_id", sa.String(length=36), nullable=True),
+            sa.Column("scope_type", sa.String(length=20), nullable=False),
+            sa.Column("scope_id", sa.String(length=36), nullable=True),
+            sa.Column("label", sa.String(length=255), nullable=False),
+            sa.Column("provider", sa.String(length=50), nullable=True),
+            sa.Column("enabled", sa.Boolean(), nullable=False),
+            sa.Column("credential_mode", sa.String(length=30), nullable=False),
+            sa.Column("username", sa.String(length=320), nullable=True),
+            sa.Column("password_encrypted", sa.Text(), nullable=True),
+            sa.Column("token_encrypted", sa.Text(), nullable=True),
+            sa.Column("password_env", sa.String(length=255), nullable=True),
+            sa.Column("token_env", sa.String(length=255), nullable=True),
+            sa.Column("secret_ref", sa.String(length=1000), nullable=True),
+            sa.Column("policy", sa.JSON(), nullable=True),
+            sa.Column("metadata", sa.JSON(), nullable=True),
+            sa.Column("created_by_user_id", sa.String(length=36), nullable=True),
+            sa.Column("updated_by_user_id", sa.String(length=36), nullable=True),
+            sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+            sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+            sa.ForeignKeyConstraint(["created_by_user_id"], ["access_users.id"], name=op.f("fk_file_connector_credentials_created_by_user_id_users"), ondelete="SET NULL"),
+            sa.ForeignKeyConstraint(["tenant_id"], [scope_fk_target], name=op.f("fk_file_connector_credentials_tenant_id_scopes"), ondelete="CASCADE"),
+            sa.ForeignKeyConstraint(["updated_by_user_id"], ["access_users.id"], name=op.f("fk_file_connector_credentials_updated_by_user_id_users"), ondelete="SET NULL"),
+            sa.PrimaryKeyConstraint("id", name=op.f("pk_file_connector_credentials")),
+        )
+
+    inspector = sa.inspect(op.get_bind())
+    indexes = {item["name"] for item in inspector.get_indexes("file_connector_credentials")}
+    for column in (
+        "tenant_id",
+        "scope_type",
+        "scope_id",
+        "provider",
+        "enabled",
+        "created_by_user_id",
+        "updated_by_user_id",
+    ):
+        name = op.f(f"ix_file_connector_credentials_{column}")
+        if name not in indexes:
+            op.create_index(name, "file_connector_credentials", [column], unique=False)
+    if "ix_file_connector_credentials_scope" not in indexes:
+        op.create_index("ix_file_connector_credentials_scope", "file_connector_credentials", ["scope_type", "scope_id"], unique=False)
+
+
+def downgrade() -> None:
+    inspector = sa.inspect(op.get_bind())
+    if "file_connector_credentials" in inspector.get_table_names():
+        indexes = {item["name"] for item in inspector.get_indexes("file_connector_credentials")}
+        for name in (
+            "ix_file_connector_credentials_scope",
+            op.f("ix_file_connector_credentials_updated_by_user_id"),
+            op.f("ix_file_connector_credentials_created_by_user_id"),
+            op.f("ix_file_connector_credentials_enabled"),
+            op.f("ix_file_connector_credentials_provider"),
+            op.f("ix_file_connector_credentials_scope_id"),
+            op.f("ix_file_connector_credentials_scope_type"),
+            op.f("ix_file_connector_credentials_tenant_id"),
+        ):
+            if name in indexes:
+                op.drop_index(name, table_name="file_connector_credentials")
+        op.drop_table("file_connector_credentials")
+
+    inspector = sa.inspect(op.get_bind())
+    if "file_connector_profiles" not in inspector.get_table_names():
+        return
+    profile_indexes = {item["name"] for item in inspector.get_indexes("file_connector_profiles")}
+    profile_index_name = op.f("ix_file_connector_profiles_credential_profile_id")
+    if profile_index_name in profile_indexes:
+        op.drop_index(profile_index_name, table_name="file_connector_profiles")
+    profile_columns = {item["name"] for item in inspector.get_columns("file_connector_profiles")}
+    if "credential_profile_id" in profile_columns:
+        op.drop_column("file_connector_profiles", "credential_profile_id")

src/govoplan_files/backend/migrations/dev_versions/a7b8c9d0e1f3_file_connector_policies.py

@@ -0,0 +1,77 @@
+"""file connector policies
+
+Revision ID: a7b8c9d0e1f3
+Revises: 6b7c8d9e0f1a
+Create Date: 2026-07-08 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "a7b8c9d0e1f3"
+down_revision = "6b7c8d9e0f1a"
+branch_labels = None
+depends_on = None
+
+
+def _scope_fk_target(inspector) -> str:
+    tables = set(inspector.get_table_names())
+    return "core_scopes.id" if "core_scopes" in tables else "tenancy_tenants.id"
+
+
+def upgrade() -> None:
+    inspector = sa.inspect(op.get_bind())
+    scope_fk_target = _scope_fk_target(inspector)
+    if "file_connector_policies" not in inspector.get_table_names():
+        op.create_table(
+            "file_connector_policies",
+            sa.Column("id", sa.String(length=36), nullable=False),
+            sa.Column("tenant_id", sa.String(length=36), nullable=True),
+            sa.Column("scope_type", sa.String(length=20), nullable=False),
+            sa.Column("scope_id", sa.String(length=36), nullable=True),
+            sa.Column("policy", sa.JSON(), nullable=False),
+            sa.Column("created_by_user_id", sa.String(length=36), nullable=True),
+            sa.Column("updated_by_user_id", sa.String(length=36), nullable=True),
+            sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+            sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+            sa.ForeignKeyConstraint(["created_by_user_id"], ["access_users.id"], name=op.f("fk_file_connector_policies_created_by_user_id_users"), ondelete="SET NULL"),
+            sa.ForeignKeyConstraint(["tenant_id"], [scope_fk_target], name=op.f("fk_file_connector_policies_tenant_id_scopes"), ondelete="CASCADE"),
+            sa.ForeignKeyConstraint(["updated_by_user_id"], ["access_users.id"], name=op.f("fk_file_connector_policies_updated_by_user_id_users"), ondelete="SET NULL"),
+            sa.PrimaryKeyConstraint("id", name=op.f("pk_file_connector_policies")),
+            sa.UniqueConstraint("tenant_id", "scope_type", "scope_id", name="uq_file_connector_policies_scope"),
+        )
+
+    inspector = sa.inspect(op.get_bind())
+    indexes = {item["name"] for item in inspector.get_indexes("file_connector_policies")}
+    for column in (
+        "tenant_id",
+        "scope_type",
+        "scope_id",
+        "created_by_user_id",
+        "updated_by_user_id",
+    ):
+        name = op.f(f"ix_file_connector_policies_{column}")
+        if name not in indexes:
+            op.create_index(name, "file_connector_policies", [column], unique=False)
+    if "ix_file_connector_policies_scope" not in indexes:
+        op.create_index("ix_file_connector_policies_scope", "file_connector_policies", ["scope_type", "scope_id"], unique=False)
+
+
+def downgrade() -> None:
+    inspector = sa.inspect(op.get_bind())
+    if "file_connector_policies" not in inspector.get_table_names():
+        return
+    indexes = {item["name"] for item in inspector.get_indexes("file_connector_policies")}
+    for name in (
+        "ix_file_connector_policies_scope",
+        op.f("ix_file_connector_policies_updated_by_user_id"),
+        op.f("ix_file_connector_policies_created_by_user_id"),
+        op.f("ix_file_connector_policies_scope_id"),
+        op.f("ix_file_connector_policies_scope_type"),
+        op.f("ix_file_connector_policies_tenant_id"),
+    ):
+        if name in indexes:
+            op.drop_index(name, table_name="file_connector_policies")
+    op.drop_table("file_connector_policies")

src/govoplan_files/backend/migrations/versions/a2b3c4d5e6f8_form_evidence_upload_grants.py

@@ -0,0 +1,147 @@
+"""add purpose-bound Form evidence upload grants
+
+Revision ID: a2b3c4d5e6f8
+Revises: f1a2b3c4d5e7
+"""
+
+from __future__ import annotations
+
+import sqlalchemy as sa
+from alembic import op
+
+
+revision = "a2b3c4d5e6f8"
+down_revision = "f1a2b3c4d5e7"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "file_form_evidence_grants",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("form_instance_id", sa.String(length=36), nullable=False),
+        sa.Column("form_definition_id", sa.String(length=255), nullable=False),
+        sa.Column("form_definition_revision", sa.String(length=255), nullable=False),
+        sa.Column("token_sha256", sa.String(length=64), nullable=False),
+        sa.Column("idempotency_key", sa.String(length=255), nullable=False),
+        sa.Column("request_sha256", sa.String(length=64), nullable=False),
+        sa.Column("custodian_user_id", sa.String(length=36), nullable=False),
+        sa.Column("evidence_kind", sa.String(length=30), nullable=False),
+        sa.Column("purpose", sa.String(length=500), nullable=False),
+        sa.Column("status", sa.String(length=30), nullable=False),
+        sa.Column("expires_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("max_size_bytes", sa.Integer(), nullable=False),
+        sa.Column("allowed_content_types", sa.JSON(), nullable=False),
+        sa.Column("file_asset_id", sa.String(length=36), nullable=True),
+        sa.Column("file_version_id", sa.String(length=36), nullable=True),
+        sa.Column("uploaded_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("revoked_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("metadata", sa.JSON(), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["custodian_user_id"],
+            ["access_users.id"],
+            ondelete="RESTRICT",
+        ),
+        sa.ForeignKeyConstraint(
+            ["file_asset_id"],
+            ["file_assets.id"],
+            ondelete="RESTRICT",
+        ),
+        sa.ForeignKeyConstraint(
+            ["file_version_id"],
+            ["file_versions.id"],
+            ondelete="RESTRICT",
+        ),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint(
+            "tenant_id",
+            "idempotency_key",
+            name="uq_file_form_evidence_grants_idempotency",
+        ),
+        sa.UniqueConstraint("token_sha256"),
+    )
+    op.create_index(
+        "ix_file_form_evidence_grants_tenant_id",
+        "file_form_evidence_grants",
+        ["tenant_id"],
+    )
+    op.create_index(
+        "ix_file_form_evidence_grants_form_instance_id",
+        "file_form_evidence_grants",
+        ["form_instance_id"],
+    )
+    op.create_index(
+        "ix_file_form_evidence_grants_custodian_user_id",
+        "file_form_evidence_grants",
+        ["custodian_user_id"],
+    )
+    op.create_index(
+        "ix_file_form_evidence_grants_status",
+        "file_form_evidence_grants",
+        ["status"],
+    )
+    op.create_index(
+        "ix_file_form_evidence_grants_expires_at",
+        "file_form_evidence_grants",
+        ["expires_at"],
+    )
+    op.create_index(
+        "ix_file_form_evidence_grants_file_asset_id",
+        "file_form_evidence_grants",
+        ["file_asset_id"],
+    )
+    op.create_index(
+        "ix_file_form_evidence_grants_file_version_id",
+        "file_form_evidence_grants",
+        ["file_version_id"],
+    )
+    op.create_index(
+        "ix_file_form_evidence_grants_form",
+        "file_form_evidence_grants",
+        [
+            "tenant_id",
+            "form_instance_id",
+            "form_definition_id",
+            "form_definition_revision",
+        ],
+    )
+
+
+def downgrade() -> None:
+    op.drop_index(
+        "ix_file_form_evidence_grants_form",
+        table_name="file_form_evidence_grants",
+    )
+    op.drop_index(
+        "ix_file_form_evidence_grants_file_version_id",
+        table_name="file_form_evidence_grants",
+    )
+    op.drop_index(
+        "ix_file_form_evidence_grants_file_asset_id",
+        table_name="file_form_evidence_grants",
+    )
+    op.drop_index(
+        "ix_file_form_evidence_grants_expires_at",
+        table_name="file_form_evidence_grants",
+    )
+    op.drop_index(
+        "ix_file_form_evidence_grants_status",
+        table_name="file_form_evidence_grants",
+    )
+    op.drop_index(
+        "ix_file_form_evidence_grants_custodian_user_id",
+        table_name="file_form_evidence_grants",
+    )
+    op.drop_index(
+        "ix_file_form_evidence_grants_form_instance_id",
+        table_name="file_form_evidence_grants",
+    )
+    op.drop_index(
+        "ix_file_form_evidence_grants_tenant_id",
+        table_name="file_form_evidence_grants",
+    )
+    op.drop_table("file_form_evidence_grants")

src/govoplan_files/backend/migrations/versions/a2b3c4d5e6f9_file_asset_lifecycle.py

@@ -0,0 +1,52 @@
+"""govern managed file retention and legal holds
+
+Revision ID: a2b3c4d5e6f9
+Revises: f1a2b3c4d5e7
+"""
+
+from __future__ import annotations
+
+import sqlalchemy as sa
+from alembic import op
+
+
+revision = "a2b3c4d5e6f9"
+down_revision = "f1a2b3c4d5e7"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    with op.batch_alter_table("file_assets") as batch_op:
+        batch_op.add_column(
+            sa.Column("retained_until", sa.DateTime(timezone=True), nullable=True)
+        )
+        batch_op.add_column(
+            sa.Column(
+                "legal_hold", sa.Boolean(), nullable=False, server_default=sa.false()
+            )
+        )
+        batch_op.add_column(
+            sa.Column(
+                "lifecycle_revision", sa.Integer(), nullable=False, server_default="1"
+            )
+        )
+        batch_op.add_column(
+            sa.Column("lifecycle_reason", sa.String(length=500), nullable=True)
+        )
+        batch_op.create_index(
+            op.f("ix_file_assets_retained_until"), ["retained_until"], unique=False
+        )
+        batch_op.create_index(
+            op.f("ix_file_assets_legal_hold"), ["legal_hold"], unique=False
+        )
+
+
+def downgrade() -> None:
+    with op.batch_alter_table("file_assets") as batch_op:
+        batch_op.drop_index(op.f("ix_file_assets_legal_hold"))
+        batch_op.drop_index(op.f("ix_file_assets_retained_until"))
+        batch_op.drop_column("lifecycle_reason")
+        batch_op.drop_column("lifecycle_revision")
+        batch_op.drop_column("legal_hold")
+        batch_op.drop_column("retained_until")

src/govoplan_files/backend/migrations/versions/a7b8c9d0e1f3_v017_files_baseline.py

@@ -0,0 +1,158 @@
+"""v0.1.7 files baseline
+
+Revision ID: a7b8c9d0e1f3
+Revises: None
+Create Date: 2026-07-11 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = 'a7b8c9d0e1f3'
+down_revision = None
+branch_labels = None
+depends_on = '4f2a9c8e7b6d'
+
+
+def upgrade() -> None:
+    op.create_table('file_connector_credentials',
+    sa.Column('id', sa.String(length=255), nullable=False),
+    sa.Column('tenant_id', sa.String(length=36), nullable=True),
+    sa.Column('scope_type', sa.String(length=20), nullable=False),
+    sa.Column('scope_id', sa.String(length=36), nullable=True),
+    sa.Column('label', sa.String(length=255), nullable=False),
+    sa.Column('provider', sa.String(length=50), nullable=True),
+    sa.Column('enabled', sa.Boolean(), nullable=False),
+    sa.Column('credential_mode', sa.String(length=30), nullable=False),
+    sa.Column('username', sa.String(length=320), nullable=True),
+    sa.Column('password_encrypted', sa.Text(), nullable=True),
+    sa.Column('token_encrypted', sa.Text(), nullable=True),
+    sa.Column('password_env', sa.String(length=255), nullable=True),
+    sa.Column('token_env', sa.String(length=255), nullable=True),
+    sa.Column('secret_ref', sa.String(length=1000), nullable=True),
+    sa.Column('policy', sa.JSON(), nullable=True),
+    sa.Column('metadata', sa.JSON(), nullable=True),
+    sa.Column('created_by_user_id', sa.String(length=36), nullable=True),
+    sa.Column('updated_by_user_id', sa.String(length=36), nullable=True),
+    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
+    sa.Column('updated_at', sa.DateTime(timezone=True), nullable=False),
+    sa.ForeignKeyConstraint(['created_by_user_id'], ['access_users.id'], name=op.f('fk_file_connector_credentials_created_by_user_id_access_users'), ondelete='SET NULL'),
+    sa.ForeignKeyConstraint(['tenant_id'], ['core_scopes.id'], name=op.f('fk_file_connector_credentials_tenant_id_scopes'), ondelete='CASCADE'),
+    sa.ForeignKeyConstraint(['updated_by_user_id'], ['access_users.id'], name=op.f('fk_file_connector_credentials_updated_by_user_id_access_users'), ondelete='SET NULL'),
+    sa.PrimaryKeyConstraint('id', name=op.f('pk_file_connector_credentials'))
+    )
+    op.create_index(op.f('ix_file_connector_credentials_created_by_user_id'), 'file_connector_credentials', ['created_by_user_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_credentials_enabled'), 'file_connector_credentials', ['enabled'], unique=False)
+    op.create_index(op.f('ix_file_connector_credentials_provider'), 'file_connector_credentials', ['provider'], unique=False)
+    op.create_index('ix_file_connector_credentials_scope', 'file_connector_credentials', ['scope_type', 'scope_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_credentials_scope_id'), 'file_connector_credentials', ['scope_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_credentials_scope_type'), 'file_connector_credentials', ['scope_type'], unique=False)
+    op.create_index(op.f('ix_file_connector_credentials_tenant_id'), 'file_connector_credentials', ['tenant_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_credentials_updated_by_user_id'), 'file_connector_credentials', ['updated_by_user_id'], unique=False)
+    op.create_table('file_connector_policies',
+    sa.Column('id', sa.String(length=36), nullable=False),
+    sa.Column('tenant_id', sa.String(length=36), nullable=True),
+    sa.Column('scope_type', sa.String(length=20), nullable=False),
+    sa.Column('scope_id', sa.String(length=36), nullable=True),
+    sa.Column('policy', sa.JSON(), nullable=False),
+    sa.Column('created_by_user_id', sa.String(length=36), nullable=True),
+    sa.Column('updated_by_user_id', sa.String(length=36), nullable=True),
+    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
+    sa.Column('updated_at', sa.DateTime(timezone=True), nullable=False),
+    sa.ForeignKeyConstraint(['created_by_user_id'], ['access_users.id'], name=op.f('fk_file_connector_policies_created_by_user_id_access_users'), ondelete='SET NULL'),
+    sa.ForeignKeyConstraint(['tenant_id'], ['core_scopes.id'], name=op.f('fk_file_connector_policies_tenant_id_scopes'), ondelete='CASCADE'),
+    sa.ForeignKeyConstraint(['updated_by_user_id'], ['access_users.id'], name=op.f('fk_file_connector_policies_updated_by_user_id_access_users'), ondelete='SET NULL'),
+    sa.PrimaryKeyConstraint('id', name=op.f('pk_file_connector_policies')),
+    sa.UniqueConstraint('tenant_id', 'scope_type', 'scope_id', name='uq_file_connector_policies_scope')
+    )
+    op.create_index(op.f('ix_file_connector_policies_created_by_user_id'), 'file_connector_policies', ['created_by_user_id'], unique=False)
+    op.create_index('ix_file_connector_policies_scope', 'file_connector_policies', ['scope_type', 'scope_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_policies_scope_id'), 'file_connector_policies', ['scope_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_policies_scope_type'), 'file_connector_policies', ['scope_type'], unique=False)
+    op.create_index(op.f('ix_file_connector_policies_tenant_id'), 'file_connector_policies', ['tenant_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_policies_updated_by_user_id'), 'file_connector_policies', ['updated_by_user_id'], unique=False)
+    op.create_table('file_connector_profiles',
+    sa.Column('id', sa.String(length=255), nullable=False),
+    sa.Column('tenant_id', sa.String(length=36), nullable=True),
+    sa.Column('scope_type', sa.String(length=20), nullable=False),
+    sa.Column('scope_id', sa.String(length=36), nullable=True),
+    sa.Column('label', sa.String(length=255), nullable=False),
+    sa.Column('provider', sa.String(length=50), nullable=False),
+    sa.Column('endpoint_url', sa.String(length=1000), nullable=True),
+    sa.Column('base_path', sa.String(length=1000), nullable=True),
+    sa.Column('enabled', sa.Boolean(), nullable=False),
+    sa.Column('credential_profile_id', sa.String(length=255), nullable=True),
+    sa.Column('credential_mode', sa.String(length=30), nullable=False),
+    sa.Column('username', sa.String(length=320), nullable=True),
+    sa.Column('password_encrypted', sa.Text(), nullable=True),
+    sa.Column('token_encrypted', sa.Text(), nullable=True),
+    sa.Column('password_env', sa.String(length=255), nullable=True),
+    sa.Column('token_env', sa.String(length=255), nullable=True),
+    sa.Column('secret_ref', sa.String(length=1000), nullable=True),
+    sa.Column('capabilities', sa.JSON(), nullable=True),
+    sa.Column('policy', sa.JSON(), nullable=True),
+    sa.Column('metadata', sa.JSON(), nullable=True),
+    sa.Column('created_by_user_id', sa.String(length=36), nullable=True),
+    sa.Column('updated_by_user_id', sa.String(length=36), nullable=True),
+    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
+    sa.Column('updated_at', sa.DateTime(timezone=True), nullable=False),
+    sa.ForeignKeyConstraint(['created_by_user_id'], ['access_users.id'], name=op.f('fk_file_connector_profiles_created_by_user_id_access_users'), ondelete='SET NULL'),
+    sa.ForeignKeyConstraint(['tenant_id'], ['core_scopes.id'], name=op.f('fk_file_connector_profiles_tenant_id_scopes'), ondelete='CASCADE'),
+    sa.ForeignKeyConstraint(['updated_by_user_id'], ['access_users.id'], name=op.f('fk_file_connector_profiles_updated_by_user_id_access_users'), ondelete='SET NULL'),
+    sa.PrimaryKeyConstraint('id', name=op.f('pk_file_connector_profiles'))
+    )
+    op.create_index(op.f('ix_file_connector_profiles_created_by_user_id'), 'file_connector_profiles', ['created_by_user_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_profiles_credential_profile_id'), 'file_connector_profiles', ['credential_profile_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_profiles_enabled'), 'file_connector_profiles', ['enabled'], unique=False)
+    op.create_index(op.f('ix_file_connector_profiles_provider'), 'file_connector_profiles', ['provider'], unique=False)
+    op.create_index('ix_file_connector_profiles_scope', 'file_connector_profiles', ['scope_type', 'scope_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_profiles_scope_id'), 'file_connector_profiles', ['scope_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_profiles_scope_type'), 'file_connector_profiles', ['scope_type'], unique=False)
+    op.create_index(op.f('ix_file_connector_profiles_tenant_id'), 'file_connector_profiles', ['tenant_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_profiles_updated_by_user_id'), 'file_connector_profiles', ['updated_by_user_id'], unique=False)
+    op.create_table('file_connector_spaces',
+    sa.Column('id', sa.String(length=36), nullable=False),
+    sa.Column('tenant_id', sa.String(length=36), nullable=False),
+    sa.Column('owner_type', sa.String(length=20), nullable=False),
+    sa.Column('owner_user_id', sa.String(length=36), nullable=True),
+    sa.Column('owner_group_id', sa.String(length=36), nullable=True),
+    sa.Column('label', sa.String(length=255), nullable=False),
+    sa.Column('connector_profile_id', sa.String(length=255), nullable=False),
+    sa.Column('provider', sa.String(length=50), nullable=False),
+    sa.Column('library_id', sa.String(length=255), nullable=True),
+    sa.Column('remote_path', sa.String(length=1000), nullable=False),
+    sa.Column('sync_mode', sa.String(length=30), nullable=False),
+    sa.Column('read_only', sa.Boolean(), nullable=False),
+    sa.Column('is_active', sa.Boolean(), nullable=False),
+    sa.Column('created_by_user_id', sa.String(length=36), nullable=True),
+    sa.Column('deleted_at', sa.DateTime(timezone=True), nullable=True),
+    sa.Column('metadata', sa.JSON(), nullable=True),
+    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
+    sa.Column('updated_at', sa.DateTime(timezone=True), nullable=False),
+    sa.ForeignKeyConstraint(['created_by_user_id'], ['access_users.id'], name=op.f('fk_file_connector_spaces_created_by_user_id_access_users'), ondelete='SET NULL'),
+    sa.ForeignKeyConstraint(['owner_group_id'], ['access_groups.id'], name=op.f('fk_file_connector_spaces_owner_group_id_access_groups'), ondelete='SET NULL'),
+    sa.ForeignKeyConstraint(['owner_user_id'], ['access_users.id'], name=op.f('fk_file_connector_spaces_owner_user_id_access_users'), ondelete='SET NULL'),
+    sa.ForeignKeyConstraint(['tenant_id'], ['core_scopes.id'], name=op.f('fk_file_connector_spaces_tenant_id_scopes'), ondelete='CASCADE'),
+    sa.PrimaryKeyConstraint('id', name=op.f('pk_file_connector_spaces'))
+    )
+    op.create_index(op.f('ix_file_connector_spaces_connector_profile_id'), 'file_connector_spaces', ['connector_profile_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_spaces_created_by_user_id'), 'file_connector_spaces', ['created_by_user_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_spaces_deleted_at'), 'file_connector_spaces', ['deleted_at'], unique=False)
+    op.create_index(op.f('ix_file_connector_spaces_is_active'), 'file_connector_spaces', ['is_active'], unique=False)
+    op.create_index('ix_file_connector_spaces_owner', 'file_connector_spaces', ['tenant_id', 'owner_type', 'owner_user_id', 'owner_group_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_spaces_owner_group_id'), 'file_connector_spaces', ['owner_group_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_spaces_owner_type'), 'file_connector_spaces', ['owner_type'], unique=False)
+    op.create_index(op.f('ix_file_connector_spaces_owner_user_id'), 'file_connector_spaces', ['owner_user_id'], unique=False)
+    op.create_index(op.f('ix_file_connector_spaces_provider'), 'file_connector_spaces', ['provider'], unique=False)
+    op.create_index(op.f('ix_file_connector_spaces_tenant_id'), 'file_connector_spaces', ['tenant_id'], unique=False)
+    op.create_index('uq_file_connector_spaces_active_group_label', 'file_connector_spaces', ['tenant_id', 'owner_group_id', 'label'], unique=True, sqlite_where=sa.text("owner_type = 'group' AND deleted_at IS NULL"), postgresql_where=sa.text("owner_type = 'group' AND deleted_at IS NULL"))
+    op.create_index('uq_file_connector_spaces_active_user_label', 'file_connector_spaces', ['tenant_id', 'owner_user_id', 'label'], unique=True, sqlite_where=sa.text("owner_type = 'user' AND deleted_at IS NULL"), postgresql_where=sa.text("owner_type = 'user' AND deleted_at IS NULL"))
+
+
+def downgrade() -> None:
+    op.drop_table('file_connector_spaces')
+    op.drop_table('file_connector_profiles')
+    op.drop_table('file_connector_policies')
+    op.drop_table('file_connector_credentials')

src/govoplan_files/backend/migrations/versions/b8c9d0e1f2a4_file_share_lifecycle.py

@@ -0,0 +1,53 @@
+"""file share lifecycle
+
+Revision ID: b8c9d0e1f2a4
+Revises: a7b8c9d0e1f3
+Create Date: 2026-07-30 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "b8c9d0e1f2a4"
+down_revision = "a7b8c9d0e1f3"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    with op.batch_alter_table("file_shares") as batch_op:
+        batch_op.add_column(
+            sa.Column("expires_at", sa.DateTime(timezone=True), nullable=True)
+        )
+        batch_op.add_column(
+            sa.Column("revoked_by_user_id", sa.String(length=36), nullable=True)
+        )
+        batch_op.create_foreign_key(
+            op.f("fk_file_shares_revoked_by_user_id_access_users"),
+            "access_users",
+            ["revoked_by_user_id"],
+            ["id"],
+            ondelete="SET NULL",
+        )
+        batch_op.create_index(
+            op.f("ix_file_shares_expires_at"), ["expires_at"], unique=False
+        )
+        batch_op.create_index(
+            op.f("ix_file_shares_revoked_by_user_id"),
+            ["revoked_by_user_id"],
+            unique=False,
+        )
+
+
+def downgrade() -> None:
+    with op.batch_alter_table("file_shares") as batch_op:
+        batch_op.drop_index(op.f("ix_file_shares_revoked_by_user_id"))
+        batch_op.drop_index(op.f("ix_file_shares_expires_at"))
+        batch_op.drop_constraint(
+            op.f("fk_file_shares_revoked_by_user_id_access_users"),
+            type_="foreignkey",
+        )
+        batch_op.drop_column("revoked_by_user_id")
+        batch_op.drop_column("expires_at")

src/govoplan_files/backend/migrations/versions/c9d0e1f2a3b5_file_integrity_reconciliation.py

@@ -0,0 +1,168 @@
+"""file integrity reconciliation
+
+Revision ID: c9d0e1f2a3b5
+Revises: b8c9d0e1f2a4
+Create Date: 2026-07-30 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "c9d0e1f2a3b5"
+down_revision = "b8c9d0e1f2a4"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    with op.batch_alter_table("file_blobs") as batch_op:
+        batch_op.add_column(
+            sa.Column(
+                "integrity_status",
+                sa.String(length=30),
+                nullable=False,
+                server_default="unchecked",
+            )
+        )
+        batch_op.add_column(
+            sa.Column("integrity_checked_at", sa.DateTime(timezone=True), nullable=True)
+        )
+        batch_op.add_column(
+            sa.Column("integrity_failure", sa.String(length=100), nullable=True)
+        )
+        batch_op.add_column(
+            sa.Column("quarantined_at", sa.DateTime(timezone=True), nullable=True)
+        )
+        batch_op.create_index(
+            op.f("ix_file_blobs_integrity_status"),
+            ["integrity_status"],
+            unique=False,
+        )
+        batch_op.create_index(
+            op.f("ix_file_blobs_integrity_checked_at"),
+            ["integrity_checked_at"],
+            unique=False,
+        )
+        batch_op.create_index(
+            op.f("ix_file_blobs_quarantined_at"),
+            ["quarantined_at"],
+            unique=False,
+        )
+
+    op.create_table(
+        "file_integrity_scans",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("storage_backend", sa.String(length=50), nullable=False),
+        sa.Column("storage_prefix", sa.String(length=1000), nullable=False),
+        sa.Column("status", sa.String(length=30), nullable=False),
+        sa.Column("phase", sa.String(length=30), nullable=False),
+        sa.Column("verify_checksums", sa.Boolean(), nullable=False),
+        sa.Column("batch_size", sa.Integer(), nullable=False),
+        sa.Column("blob_cursor", sa.String(length=36), nullable=True),
+        sa.Column("object_cursor", sa.String(length=1000), nullable=True),
+        sa.Column("scanned_blob_count", sa.Integer(), nullable=False),
+        sa.Column("verified_blob_count", sa.Integer(), nullable=False),
+        sa.Column("quarantined_blob_count", sa.Integer(), nullable=False),
+        sa.Column("scanned_object_count", sa.Integer(), nullable=False),
+        sa.Column("orphan_object_count", sa.Integer(), nullable=False),
+        sa.Column("created_by_user_id", sa.String(length=36), nullable=True),
+        sa.Column("started_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("completed_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("last_error", sa.String(length=255), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["created_by_user_id"],
+            ["access_users.id"],
+            name=op.f(
+                "fk_file_integrity_scans_created_by_user_id_access_users"
+            ),
+            ondelete="SET NULL",
+        ),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_file_integrity_scans")),
+    )
+    for column in ("tenant_id", "status", "created_by_user_id"):
+        op.create_index(
+            op.f(f"ix_file_integrity_scans_{column}"),
+            "file_integrity_scans",
+            [column],
+            unique=False,
+        )
+
+    op.create_table(
+        "file_integrity_findings",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("scan_id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("kind", sa.String(length=40), nullable=False),
+        sa.Column("state", sa.String(length=30), nullable=False),
+        sa.Column("blob_id", sa.String(length=36), nullable=True),
+        sa.Column("storage_key", sa.String(length=1000), nullable=False),
+        sa.Column("expected_size_bytes", sa.Integer(), nullable=True),
+        sa.Column("observed_size_bytes", sa.Integer(), nullable=True),
+        sa.Column("expected_checksum_sha256", sa.String(length=64), nullable=True),
+        sa.Column("observed_checksum_sha256", sa.String(length=64), nullable=True),
+        sa.Column("resolved_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("resolved_by_user_id", sa.String(length=36), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["blob_id"],
+            ["file_blobs.id"],
+            name=op.f("fk_file_integrity_findings_blob_id_file_blobs"),
+            ondelete="SET NULL",
+        ),
+        sa.ForeignKeyConstraint(
+            ["resolved_by_user_id"],
+            ["access_users.id"],
+            name=op.f(
+                "fk_file_integrity_findings_resolved_by_user_id_access_users"
+            ),
+            ondelete="SET NULL",
+        ),
+        sa.ForeignKeyConstraint(
+            ["scan_id"],
+            ["file_integrity_scans.id"],
+            name=op.f(
+                "fk_file_integrity_findings_scan_id_file_integrity_scans"
+            ),
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_file_integrity_findings")),
+    )
+    for column in (
+        "scan_id",
+        "tenant_id",
+        "kind",
+        "state",
+        "blob_id",
+        "resolved_by_user_id",
+    ):
+        op.create_index(
+            op.f(f"ix_file_integrity_findings_{column}"),
+            "file_integrity_findings",
+            [column],
+            unique=False,
+        )
+    op.create_index(
+        "ix_file_integrity_findings_scan_state",
+        "file_integrity_findings",
+        ["scan_id", "state"],
+        unique=False,
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("file_integrity_findings")
+    op.drop_table("file_integrity_scans")
+    with op.batch_alter_table("file_blobs") as batch_op:
+        batch_op.drop_index(op.f("ix_file_blobs_quarantined_at"))
+        batch_op.drop_index(op.f("ix_file_blobs_integrity_checked_at"))
+        batch_op.drop_index(op.f("ix_file_blobs_integrity_status"))
+        batch_op.drop_column("quarantined_at")
+        batch_op.drop_column("integrity_failure")
+        batch_op.drop_column("integrity_checked_at")
+        batch_op.drop_column("integrity_status")

src/govoplan_files/backend/migrations/versions/d0e1f2a3b4c6_file_content_protection.py

@@ -0,0 +1,79 @@
+"""file content-protection metadata
+
+Revision ID: d0e1f2a3b4c6
+Revises: c9d0e1f2a3b5
+Create Date: 2026-08-02 00:00:00.000000
+"""
+
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "d0e1f2a3b4c6"
+down_revision = "c9d0e1f2a3b5"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    with op.batch_alter_table("file_blobs") as batch_op:
+        batch_op.add_column(
+            sa.Column(
+                "protection_discriminator",
+                sa.String(length=320),
+                nullable=False,
+                server_default="plaintext",
+            )
+        )
+        batch_op.add_column(
+            sa.Column("encryption_envelope_id", sa.String(length=255), nullable=True)
+        )
+        batch_op.add_column(
+            sa.Column("storage_checksum_sha256", sa.String(length=64), nullable=True)
+        )
+        batch_op.add_column(
+            sa.Column("storage_size_bytes", sa.Integer(), nullable=True)
+        )
+        batch_op.drop_constraint(
+            "uq_file_blobs_tenant_checksum_size",
+            type_="unique",
+        )
+        batch_op.create_unique_constraint(
+            "uq_file_blobs_tenant_checksum_size_protection",
+            [
+                "tenant_id",
+                "checksum_sha256",
+                "size_bytes",
+                "protection_discriminator",
+            ],
+        )
+        batch_op.create_index(
+            op.f("ix_file_blobs_protection_discriminator"),
+            ["protection_discriminator"],
+            unique=False,
+        )
+        batch_op.create_index(
+            op.f("ix_file_blobs_encryption_envelope_id"),
+            ["encryption_envelope_id"],
+            unique=False,
+        )
+
+
+def downgrade() -> None:
+    with op.batch_alter_table("file_blobs") as batch_op:
+        batch_op.drop_index(op.f("ix_file_blobs_encryption_envelope_id"))
+        batch_op.drop_index(op.f("ix_file_blobs_protection_discriminator"))
+        batch_op.drop_constraint(
+            "uq_file_blobs_tenant_checksum_size_protection",
+            type_="unique",
+        )
+        batch_op.create_unique_constraint(
+            "uq_file_blobs_tenant_checksum_size",
+            ["tenant_id", "checksum_sha256", "size_bytes"],
+        )
+        batch_op.drop_column("storage_size_bytes")
+        batch_op.drop_column("storage_checksum_sha256")
+        batch_op.drop_column("encryption_envelope_id")
+        batch_op.drop_column("protection_discriminator")

src/govoplan_files/backend/migrations/versions/f1a2b3c4d5e7_file_integrity_action_revisions.py

@@ -0,0 +1,34 @@
+"""add stale-action revisions to Files integrity operations
+
+Revision ID: f1a2b3c4d5e7
+Revises: d0e1f2a3b4c6
+"""
+
+from __future__ import annotations
+
+import sqlalchemy as sa
+from alembic import op
+
+
+revision = "f1a2b3c4d5e7"
+down_revision = "d0e1f2a3b4c6"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    with op.batch_alter_table("file_integrity_scans") as batch_op:
+        batch_op.add_column(
+            sa.Column("revision", sa.Integer(), nullable=False, server_default="1")
+        )
+    with op.batch_alter_table("file_integrity_findings") as batch_op:
+        batch_op.add_column(
+            sa.Column("revision", sa.Integer(), nullable=False, server_default="1")
+        )
+
+
+def downgrade() -> None:
+    with op.batch_alter_table("file_integrity_findings") as batch_op:
+        batch_op.drop_column("revision")
+    with op.batch_alter_table("file_integrity_scans") as batch_op:
+        batch_op.drop_column("revision")

src/govoplan_files/backend/operational_checks.py

@@ -0,0 +1,67 @@
+from __future__ import annotations
+
+import hashlib
+import secrets
+from uuid import uuid4
+
+from govoplan_core.core.operations import OperationalCheck
+from govoplan_files.backend.storage.backends import (
+    StorageBackendError,
+    get_storage_backend,
+)
+
+
+def managed_storage_roundtrip_check() -> OperationalCheck:
+    """Exercise the configured managed store without retaining probe data."""
+
+    backend = get_storage_backend()
+    key = f".govoplan-health/probes/{uuid4().hex}.bin"
+    payload = secrets.token_bytes(64)
+    expected_digest = hashlib.sha256(payload).hexdigest()
+    delete_error: Exception | None = None
+    try:
+        backend.put_bytes(key, payload, content_type="application/octet-stream")
+        stored = backend.get_bytes(key)
+        info = backend.stat(key)
+        if info.size_bytes != len(payload):
+            raise StorageBackendError("Managed storage returned an unexpected object size")
+        if hashlib.sha256(stored).hexdigest() != expected_digest:
+            raise StorageBackendError("Managed storage returned different bytes than were written")
+    except Exception as exc:  # noqa: BLE001 - operational boundary reports provider failures.
+        return OperationalCheck(
+            id="files.managed_storage_roundtrip",
+            label="Managed file storage",
+            state="error",
+            detail=(
+                "The configured managed file store failed a bounded write/read/stat/delete "
+                f"probe ({type(exc).__name__})."
+            ),
+            readiness_critical=True,
+            metrics={"backend": backend.name, "probe_bytes": len(payload)},
+        )
+    finally:
+        try:
+            backend.delete(key)
+        except Exception as exc:  # noqa: BLE001 - reported below when the data probe passed.
+            delete_error = exc
+
+    if delete_error is not None:
+        return OperationalCheck(
+            id="files.managed_storage_roundtrip",
+            label="Managed file storage",
+            state="error",
+            detail=(
+                "Managed file bytes round-tripped, but probe cleanup failed "
+                f"({type(delete_error).__name__})."
+            ),
+            readiness_critical=True,
+            metrics={"backend": backend.name, "probe_bytes": len(payload)},
+        )
+    return OperationalCheck(
+        id="files.managed_storage_roundtrip",
+        label="Managed file storage",
+        state="ok",
+        detail="The configured managed file store passed write, read, stat, integrity, and delete checks.",
+        metrics={"backend": backend.name, "probe_bytes": len(payload)},
+    )
+

src/govoplan_files/backend/provider_state.py

@@ -0,0 +1,133 @@
+from __future__ import annotations
+
+from collections import defaultdict
+from datetime import UTC, datetime
+
+from sqlalchemy import or_, select
+from sqlalchemy.orm import Session
+
+from govoplan_core.core.provider_governance import (
+    ExternalProviderRuntimeState,
+    ExternalProviderStateContext,
+)
+from govoplan_files.backend.db.models import FileConnectorProfile, FileConnectorSpace
+from govoplan_files.backend.storage.connector_providers import (
+    ConnectorProviderDescriptor,
+    connector_provider_descriptors,
+)
+
+
+REMOTE_STORAGE_PROVIDER_ID = "files.remote_storage"
+
+
+def remote_storage_provider_states(
+    context: ExternalProviderStateContext,
+) -> tuple[ExternalProviderRuntimeState, ...]:
+    if not isinstance(context.session, Session):
+        raise RuntimeError("Files provider state requires a database session.")
+    statement = select(FileConnectorProfile)
+    if context.tenant_id is not None:
+        statement = statement.where(
+            or_(
+                FileConnectorProfile.tenant_id.is_(None),
+                FileConnectorProfile.tenant_id == context.tenant_id,
+            )
+        )
+    profiles = tuple(
+        context.session.scalars(
+            statement.order_by(
+                FileConnectorProfile.tenant_id,
+                FileConnectorProfile.id,
+            ).limit(context.max_items + 1)
+        )
+    )
+    if not profiles:
+        return ()
+
+    profile_ids = tuple(item.id for item in profiles)
+    space_statement = select(FileConnectorSpace).where(
+        FileConnectorSpace.connector_profile_id.in_(profile_ids),
+        FileConnectorSpace.deleted_at.is_(None),
+    )
+    if context.tenant_id is not None:
+        space_statement = space_statement.where(
+            FileConnectorSpace.tenant_id == context.tenant_id
+        )
+    spaces_by_profile: dict[str, list[FileConnectorSpace]] = defaultdict(list)
+    for space in context.session.scalars(space_statement):
+        spaces_by_profile[space.connector_profile_id].append(space)
+
+    descriptors = {
+        item.provider: item for item in connector_provider_descriptors()
+    }
+    observed_at = datetime.now(UTC)
+    return tuple(
+        _profile_state(
+            profile,
+            spaces=spaces_by_profile.get(profile.id, []),
+            descriptor=descriptors.get(profile.provider),
+            observed_at=observed_at,
+        )
+        for profile in profiles
+    )
+
+
+def _profile_state(
+    profile: FileConnectorProfile,
+    *,
+    spaces: list[FileConnectorSpace],
+    descriptor: ConnectorProviderDescriptor | None,
+    observed_at: datetime,
+) -> ExternalProviderRuntimeState:
+    active_spaces = tuple(item for item in spaces if item.is_active)
+    active = bool(profile.enabled)
+    implementation_ready = bool(
+        descriptor is not None and descriptor.implemented and descriptor.installed
+    )
+    health = (
+        "inactive"
+        if not active
+        else "error"
+        if not implementation_ready
+        else "unknown"
+    )
+    recovery = (
+        "not_applicable"
+        if not active
+        else "unsupported"
+        if not implementation_ready
+        else "attention"
+    )
+    detail = (
+        "Remote-storage connector profile is disabled."
+        if not active
+        else "The configured provider is not available in this runtime."
+        if not implementation_ready
+        else "Software support is available; no live remote health observation is retained."
+    )
+    return ExternalProviderRuntimeState(
+        provider_id=REMOTE_STORAGE_PROVIDER_ID,
+        binding_ref=f"files:connector-profile:{profile.id}",
+        authority_mode="external_mirror",
+        observed_at=observed_at,
+        configured=True,
+        active=active,
+        health=health,
+        freshness="unknown" if active else "not_applicable",
+        conflict="not_applicable",
+        recovery=recovery,
+        detail=detail,
+        metrics={
+            "provider": profile.provider,
+            "configured_spaces": len(spaces),
+            "active_spaces": len(active_spaces),
+            "write_requested_spaces": sum(
+                1 for item in active_spaces if not item.read_only
+            ),
+            "software_implemented": bool(descriptor and descriptor.implemented),
+            "optional_dependency_available": bool(descriptor and descriptor.installed),
+        },
+    )
+
+
+__all__ = ["REMOTE_STORAGE_PROVIDER_ID", "remote_storage_provider_states"]

src/govoplan_files/backend/record_source.py

@@ -0,0 +1,113 @@
+from __future__ import annotations
+
+from collections.abc import Sequence
+from urllib.parse import quote
+
+from sqlalchemy.orm import Session
+
+from govoplan_core.core.records import (
+    RecordContractError,
+    RecordSourceLocator,
+    RecordSourceReference,
+)
+from govoplan_files.backend.db.models import FileBlob, FileVersion
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.files import get_asset_for_user
+
+
+CAPABILITY_RECORD_SOURCE_FILES = "records.source.files"
+
+
+class FilesRecordSource:
+    provider_id = "files"
+
+    def resource_types(self) -> Sequence[str]:
+        return ("file_version",)
+
+    def resolve(
+        self,
+        session: object,
+        principal: object,
+        *,
+        locator: RecordSourceLocator,
+        purpose: str,
+    ) -> RecordSourceReference:
+        if not isinstance(session, Session):
+            raise RecordContractError(
+                "Files record references require a database session."
+            )
+        tenant_id = str(getattr(principal, "tenant_id", "") or "").strip()
+        if not tenant_id or locator.tenant_id != tenant_id:
+            raise RecordContractError("Files record references cannot cross tenants.")
+        if locator.source_module != "files" or locator.resource_type != "file_version":
+            raise RecordContractError("Unsupported Files record source type.")
+        if not str(purpose or "").strip():
+            raise RecordContractError("Files record references require a purpose.")
+        if not hasattr(principal, "has") or not (
+            principal.has("files:file:read") or principal.has("files:file:admin")
+        ):
+            raise RecordContractError("Current Files read permission is required.")
+        user = getattr(principal, "user", None)
+        user_id = str(
+            getattr(user, "id", "") or getattr(principal, "membership_id", "") or ""
+        ).strip()
+        if not user_id:
+            raise RecordContractError(
+                "Files record references require a tenant user principal."
+            )
+        try:
+            asset = get_asset_for_user(
+                session,
+                tenant_id=tenant_id,
+                user_id=user_id,
+                asset_id=locator.resource_id,
+                is_admin=principal.has("files:file:admin"),
+            )
+        except FileStorageError as exc:
+            raise RecordContractError(str(exc)) from exc
+        version_query = session.query(FileVersion).filter(
+            FileVersion.tenant_id == tenant_id,
+            FileVersion.file_asset_id == asset.id,
+        )
+        revision = locator.source_revision.strip()
+        version = version_query.filter(FileVersion.id == revision).one_or_none()
+        if version is None:
+            raise RecordContractError("The exact file version does not exist.")
+        blob = session.get(FileBlob, version.blob_id)
+        if blob is None or blob.tenant_id != tenant_id:
+            raise RecordContractError(
+                "The exact file version has no managed content object."
+            )
+        if blob.quarantined_at is not None or blob.integrity_status == "failed":
+            raise RecordContractError(
+                "The exact file version failed the current integrity gate."
+            )
+        return RecordSourceReference(
+            locator=locator,
+            label=version.filename_at_upload,
+            authority_mode="external_authoritative",
+            content_sha256=version.checksum_sha256,
+            content_type=version.content_type,
+            size_bytes=version.size_bytes,
+            recorded_at=version.created_at,
+            launch_url=(
+                f"/files?fileId={quote(asset.id, safe='')}&versionId={quote(version.id, safe='')}"
+            ),
+            metadata={
+                "display_path": version.display_path_at_upload,
+                "version_number": version.version_number,
+                "integrity_status": blob.integrity_status,
+                "protection": blob.protection_discriminator,
+            },
+        )
+
+
+def create_files_record_source(_context: object) -> FilesRecordSource:
+    return FilesRecordSource()
+
+
+__all__ = [
+    "CAPABILITY_RECORD_SOURCE_FILES",
+    "FilesRecordSource",
+    "create_files_record_source",
+]

src/govoplan_files/backend/router.py

@@ -1,722 +1,40 @@
 from __future__ import annotations
 
-import json
-import os
-import tempfile
-from io import BytesIO
-from typing import Literal
-from urllib.parse import quote
-from fastapi import APIRouter, Depends, File as FastAPIFile, Form, HTTPException, UploadFile, status
-from fastapi.responses import FileResponse, StreamingResponse
-from starlette.background import BackgroundTask
-from sqlalchemy import or_
-from sqlalchemy.orm import Session
+from fastapi import APIRouter
 
-from govoplan_core.auth.dependencies import ApiPrincipal, has_scope, require_scope
-from govoplan_core.core.optional import reraise_unless_missing_package
-from govoplan_files.backend.schemas import (
-    ArchiveRequest,
-    BulkFileShareRequest,
-    BulkFileShareResponse,
-    BulkDeleteRequest,
-    BulkDeleteResponse,
-    ConflictResolutionRequest,
-    FileAssetResponse,
-    FileFolderCreateRequest,
-    FileFolderDeleteRequest,
-    FileFolderDeleteResponse,
-    FileFolderResponse,
-    FileFoldersResponse,
-    FileListResponse,
-    FileShareRequest,
-    FileShareResponse,
-    FileSpaceResponse,
-    FileSpacesResponse,
-    FileUploadResponse,
-    PatternMatchResponse,
-    PatternResolveRequest,
-    PatternResolveResponse,
-    RenamePreviewItem,
-    RenameRequest,
-    RenameResponse,
-    TransferRequest,
-    TransferResponse,
-    _conflict_resolutions,
+from govoplan_files.backend.routes.assets import router as assets_router
+from govoplan_files.backend.routes.connector_io import router as connector_io_router
+from govoplan_files.backend.routes.connector_profiles import (
+    router as connector_profiles_router,
 )
-from govoplan_core.db.models import Group, UserGroupMembership
-from govoplan_files.backend.db.models import FileAsset, FileFolder, FileShare
-from govoplan_core.db.session import get_session
-from govoplan_files.backend.runtime import settings
-from govoplan_files.backend.storage.paths import UnsafeFilePathError, filename_from_path, normalize_logical_path
-from govoplan_files.backend.storage.access import ensure_group_access, user_group_ids
-from govoplan_files.backend.storage.archives import create_zip_file, extract_zip_upload
-from govoplan_files.backend.storage.common import FileStorageError
-from govoplan_files.backend.storage.files import (
-    asset_is_audit_relevant,
-    create_file_asset,
-    current_version_and_blob,
-    get_asset_for_user,
-    list_assets_for_user,
-    read_asset_bytes,
-    share_file,
-    share_files,
-    soft_delete_assets,
+from govoplan_files.backend.routes.connector_settings import (
+    router as connector_settings_router,
 )
-from govoplan_files.backend.storage.folders import create_folder, list_folders_for_user, soft_delete_folder
-from govoplan_files.backend.storage.search import resolve_patterns
-from govoplan_files.backend.storage.transfers import rename_selection, transfer_selection
-
-router = APIRouter(prefix="/files", tags=["files"])
+from govoplan_files.backend.routes.folders import router as folders_router
+from govoplan_files.backend.routes.form_evidence import router as form_evidence_router
+from govoplan_files.backend.routes.integrity import router as integrity_router
+from govoplan_files.backend.routes.lifecycle import router as lifecycle_router
+from govoplan_files.backend.routes.listing import router as listing_router
+from govoplan_files.backend.routes.shares import router as shares_router
+from govoplan_files.backend.routes.spaces import router as spaces_router
+from govoplan_files.backend.routes.transfers import router as transfers_router
+from govoplan_files.backend.routes.uploads import router as uploads_router
 
 
-def _campaign_models():
-    try:
-        from govoplan_campaign.backend.db.models import Campaign, CampaignShare
-    except ModuleNotFoundError as exc:
-        reraise_unless_missing_package(exc, "govoplan_campaign")
-        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Campaign module is not installed") from exc
-    return Campaign, CampaignShare
-
-
-def _is_admin(principal: ApiPrincipal) -> bool:
-    return has_scope(principal, "files:file:admin")
-
-
-async def _read_limited_upload(upload: UploadFile, *, max_bytes: int) -> bytes:
-    data = await upload.read(max_bytes + 1)
-    if len(data) > max_bytes:
-        raise HTTPException(
-            status_code=status.HTTP_413_REQUEST_ENTITY_TOO_LARGE,
-            detail=f"Upload exceeds limit of {max_bytes} bytes",
-        )
-    return data
-
-
-
-
-def _cleanup_temp_file(path: str) -> None:
-    try:
-        os.unlink(path)
-    except FileNotFoundError:
-        pass
-
-
-def _attachment_disposition(filename: str) -> str:
-    safe = filename.replace("\\", "_").replace("/", "_").replace("\r", "_").replace("\n", "_").strip() or "download"
-    ascii_name = "".join(
-        char if 32 <= ord(char) < 127 and char not in {'"', "\\", ";"} else "_"
-        for char in safe
-    ).strip() or "download"
-    encoded = quote(safe, safe="")
-    return f'attachment; filename="{ascii_name}"; filename*=UTF-8' + "''" + encoded
-
-
-def _ensure_campaign_file_access(session: Session, principal: ApiPrincipal, campaign_id: str | None) -> None:
-    if not campaign_id:
-        return
-    if not has_scope(principal, "campaigns:campaign:read"):
-        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Missing scope: campaign:read")
-    Campaign, CampaignShare = _campaign_models()
-    campaign = session.get(Campaign, campaign_id)
-    if not campaign or campaign.tenant_id != principal.tenant_id:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Campaign not found")
-    if has_scope(principal, "tenant:*"):
-        return
-    if campaign.owner_user_id == principal.user.id:
-        return
-    group_ids = {
-        row[0]
-        for row in session.query(UserGroupMembership.group_id)
-        .filter(UserGroupMembership.tenant_id == principal.tenant_id, UserGroupMembership.user_id == principal.user.id)
-        .all()
-    }
-    if campaign.owner_group_id and campaign.owner_group_id in group_ids:
-        return
-    share = (
-        session.query(CampaignShare)
-        .filter(
-            CampaignShare.tenant_id == principal.tenant_id,
-            CampaignShare.campaign_id == campaign.id,
-            CampaignShare.revoked_at.is_(None),
-            or_(
-                (CampaignShare.target_type == "user") & (CampaignShare.target_id == principal.user.id),
-                (CampaignShare.target_type == "group") & (CampaignShare.target_id.in_(group_ids)),
-            ),
-        )
-        .first()
-    )
-    if share is None:
-        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="No access to this campaign")
-
-
-def _http_error(exc: Exception, *, not_found: bool = False) -> HTTPException:
-    code = status.HTTP_404_NOT_FOUND if not_found else status.HTTP_400_BAD_REQUEST
-    return HTTPException(status_code=code, detail=str(exc))
-
-
-def _owner_id(asset: FileAsset) -> str:
-    return asset.owner_user_id if asset.owner_type == "user" else asset.owner_group_id  # type: ignore[return-value]
-
-
-def _asset_response(session: Session, asset: FileAsset, *, include_shares: bool = False) -> FileAssetResponse:
-    version, blob = current_version_and_blob(session, asset)
-    shares: list[FileShareResponse] = []
-    if include_shares:
-        rows = session.query(FileShare).filter(FileShare.file_asset_id == asset.id).order_by(FileShare.created_at.desc()).all()
-        shares = [
-            FileShareResponse(
-                id=row.id,
-                target_type=row.target_type,
-                target_id=row.target_id,
-                permission=row.permission,
-                created_at=row.created_at.isoformat(),
-                revoked_at=row.revoked_at.isoformat() if row.revoked_at else None,
-            )
-            for row in rows
-        ]
-    return FileAssetResponse(
-        id=asset.id,
-        tenant_id=asset.tenant_id,
-        owner_type=asset.owner_type,
-        owner_id=_owner_id(asset),
-        display_path=asset.display_path,
-        filename=asset.filename,
-        description=asset.description,
-        size_bytes=blob.size_bytes,
-        content_type=blob.content_type,
-        checksum_sha256=blob.checksum_sha256,
-        version_id=version.id,
-        created_at=asset.created_at.isoformat(),
-        updated_at=asset.updated_at.isoformat(),
-        deleted_at=asset.deleted_at.isoformat() if asset.deleted_at else None,
-        audit_relevant=asset_is_audit_relevant(session, asset),
-        metadata=asset.metadata_ or {},
-        shares=shares,
-    )
-
-
-def _folder_owner_id(folder: FileFolder) -> str:
-    return folder.owner_user_id if folder.owner_type == "user" else folder.owner_group_id  # type: ignore[return-value]
-
-
-def _folder_response(folder: FileFolder) -> FileFolderResponse:
-    return FileFolderResponse(
-        id=folder.id,
-        tenant_id=folder.tenant_id,
-        owner_type=folder.owner_type,
-        owner_id=_folder_owner_id(folder),
-        path=folder.path,
-        created_at=folder.created_at.isoformat(),
-        updated_at=folder.updated_at.isoformat(),
-        deleted_at=folder.deleted_at.isoformat() if folder.deleted_at else None,
-    )
-
-
-def _ensure_list_owner_access(session: Session, principal: ApiPrincipal, owner_type: str | None, owner_id: str | None) -> None:
-    if not owner_type:
-        return
-    if owner_type == "user" and owner_id and owner_id != principal.user.id and not _is_admin(principal):
-        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="No access to this user file space")
-    if owner_type == "group" and owner_id:
-        try:
-            ensure_group_access(
-                session,
-                tenant_id=principal.tenant_id,
-                group_id=owner_id,
-                user_id=principal.user.id,
-                is_admin=_is_admin(principal),
-            )
-        except FileStorageError as exc:
-            raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail=str(exc)) from exc
-
-
-@router.get("/spaces", response_model=FileSpacesResponse)
-def list_file_spaces(
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:read")),
+router = APIRouter()
+for workflow_router in (
+    spaces_router,
+    folders_router,
+    form_evidence_router,
+    integrity_router,
+    lifecycle_router,
+    listing_router,
+    uploads_router,
+    connector_settings_router,
+    connector_io_router,
+    connector_profiles_router,
+    assets_router,
+    shares_router,
+    transfers_router,
 ):
-    spaces = [
-        FileSpaceResponse(
-            id=f"user:{principal.user.id}",
-            label="My files",
-            owner_type="user",
-            owner_id=principal.user.id,
-            description="Files owned by your user account.",
-        )
-    ]
-    group_ids = user_group_ids(session, tenant_id=principal.tenant_id, user_id=principal.user.id, include_admin_groups=_is_admin(principal))
-    if group_ids:
-        groups = session.query(Group).filter(Group.tenant_id == principal.tenant_id, Group.id.in_(group_ids)).order_by(Group.name.asc()).all()
-        spaces.extend(
-            FileSpaceResponse(
-                id=f"group:{group.id}",
-                label=f"{group.name} files",
-                owner_type="group",
-                owner_id=group.id,
-                description="Files owned by this group.",
-            )
-            for group in groups
-        )
-    return FileSpacesResponse(spaces=spaces)
-
-
-@router.get("/folders", response_model=FileFoldersResponse)
-def list_file_folders(
-    owner_type: Literal["user", "group"],
-    owner_id: str,
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:read")),
-):
-    try:
-        folders = list_folders_for_user(
-            session,
-            tenant_id=principal.tenant_id,
-            user_id=principal.user.id,
-            owner_type=owner_type,
-            owner_id=owner_id,
-            is_admin=_is_admin(principal),
-        )
-        return FileFoldersResponse(folders=[_folder_response(folder) for folder in folders])
-    except FileStorageError as exc:
-        raise _http_error(exc) from exc
-
-
-@router.post("/folders", response_model=FileFolderResponse)
-def create_file_folder(
-    payload: FileFolderCreateRequest,
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:organize")),
-):
-    try:
-        folder = create_folder(
-            session,
-            tenant_id=principal.tenant_id,
-            owner_type=payload.owner_type,
-            owner_id=payload.owner_id,
-            user_id=principal.user.id,
-            path=payload.path,
-            is_admin=_is_admin(principal),
-        )
-        session.commit()
-        return _folder_response(folder)
-    except (FileStorageError, UnsafeFilePathError, ValueError) as exc:
-        session.rollback()
-        raise _http_error(exc) from exc
-
-
-@router.post("/folders/delete", response_model=FileFolderDeleteResponse)
-def delete_file_folder(
-    payload: FileFolderDeleteRequest,
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:delete")),
-):
-    try:
-        deleted_folders, deleted_files = soft_delete_folder(
-            session,
-            tenant_id=principal.tenant_id,
-            owner_type=payload.owner_type,
-            owner_id=payload.owner_id,
-            user_id=principal.user.id,
-            path=payload.path,
-            recursive=payload.recursive,
-            is_admin=_is_admin(principal),
-        )
-        session.commit()
-        return FileFolderDeleteResponse(deleted_folders=deleted_folders, deleted_files=deleted_files)
-    except (FileStorageError, UnsafeFilePathError, ValueError) as exc:
-        session.rollback()
-        raise _http_error(exc) from exc
-
-
-@router.get("", response_model=FileListResponse)
-def list_files(
-    owner_type: Literal["user", "group"] | None = None,
-    owner_id: str | None = None,
-    campaign_id: str | None = None,
-    path_prefix: str | None = None,
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:read")),
-):
-    _ensure_list_owner_access(session, principal, owner_type, owner_id)
-    _ensure_campaign_file_access(session, principal, campaign_id)
-    assets = list_assets_for_user(
-        session,
-        tenant_id=principal.tenant_id,
-        user_id=principal.user.id,
-        owner_type=owner_type,
-        owner_id=owner_id,
-        campaign_id=campaign_id,
-        path_prefix=path_prefix,
-        is_admin=_is_admin(principal),
-    )
-    return FileListResponse(files=[_asset_response(session, asset, include_shares=True) for asset in assets])
-
-
-@router.post("/upload", response_model=FileUploadResponse)
-async def upload_files(
-    files: list[UploadFile] = FastAPIFile(...),
-    owner_type: Literal["user", "group"] = Form(default="user"),
-    owner_id: str | None = Form(default=None),
-    path: str = Form(default=""),
-    campaign_id: str | None = Form(default=None),
-    unpack_zip: bool = Form(default=False),
-    conflict_strategy: Literal["reject", "overwrite", "rename"] = Form(default="reject"),
-    conflict_resolutions_json: str | None = Form(default=None),
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:upload")),
-):
-    target_owner = owner_id or principal.user.id
-    uploaded_assets: list[FileAsset] = []
-    try:
-        raw_resolutions = json.loads(conflict_resolutions_json) if conflict_resolutions_json else []
-        upload_resolutions = _conflict_resolutions([ConflictResolutionRequest(**item) for item in raw_resolutions])
-        for upload in files:
-            filename = upload.filename or "file"
-            content_type = upload.content_type or None
-            upload_limit = settings.file_upload_zip_max_bytes if unpack_zip and filename.lower().endswith(".zip") else settings.file_upload_max_bytes
-            data = await _read_limited_upload(upload, max_bytes=upload_limit)
-            if unpack_zip and filename.lower().endswith(".zip"):
-                extracted = extract_zip_upload(
-                    session,
-                    tenant_id=principal.tenant_id,
-                    owner_type=owner_type,
-                    owner_id=target_owner,
-                    user_id=principal.user.id,
-                    zip_data=data,
-                    folder=path,
-                    campaign_id=campaign_id,
-                    conflict_strategy=conflict_strategy,
-                    conflict_resolutions=upload_resolutions,
-                    is_admin=_is_admin(principal),
-                    max_file_bytes=settings.file_upload_max_bytes,
-                    max_total_bytes=settings.file_upload_zip_max_bytes,
-                )
-                uploaded_assets.extend(item.asset for item in extracted)
-                continue
-            stored = create_file_asset(
-                session,
-                tenant_id=principal.tenant_id,
-                owner_type=owner_type,
-                owner_id=target_owner,
-                user_id=principal.user.id,
-                filename=filename,
-                data=data,
-                folder=path,
-                content_type=content_type,
-                campaign_id=campaign_id,
-                conflict_strategy=conflict_strategy,
-                conflict_resolutions=upload_resolutions,
-                is_admin=_is_admin(principal),
-            )
-            uploaded_assets.append(stored.asset)
-        session.commit()
-    except (FileStorageError, UnsafeFilePathError, ValueError) as exc:
-        session.rollback()
-        raise _http_error(exc) from exc
-    return FileUploadResponse(files=[_asset_response(session, asset, include_shares=True) for asset in uploaded_assets])
-
-
-@router.post("/upload-zip", response_model=FileUploadResponse)
-async def upload_zip(
-    file: UploadFile = FastAPIFile(...),
-    owner_type: Literal["user", "group"] = Form(default="user"),
-    owner_id: str | None = Form(default=None),
-    path: str = Form(default=""),
-    campaign_id: str | None = Form(default=None),
-    conflict_strategy: Literal["reject", "overwrite", "rename"] = Form(default="reject"),
-    conflict_resolutions_json: str | None = Form(default=None),
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:upload")),
-):
-    data = await _read_limited_upload(file, max_bytes=settings.file_upload_zip_max_bytes)
-    target_owner = owner_id or principal.user.id
-    try:
-        raw_resolutions = json.loads(conflict_resolutions_json) if conflict_resolutions_json else []
-        upload_resolutions = _conflict_resolutions([ConflictResolutionRequest(**item) for item in raw_resolutions])
-        extracted = extract_zip_upload(
-            session,
-            tenant_id=principal.tenant_id,
-            owner_type=owner_type,
-            owner_id=target_owner,
-            user_id=principal.user.id,
-            zip_data=data,
-            folder=path,
-            campaign_id=campaign_id,
-            conflict_strategy=conflict_strategy,
-            conflict_resolutions=upload_resolutions,
-            is_admin=_is_admin(principal),
-            max_file_bytes=settings.file_upload_max_bytes,
-            max_total_bytes=settings.file_upload_zip_max_bytes,
-        )
-        session.commit()
-    except (FileStorageError, UnsafeFilePathError, ValueError) as exc:
-        session.rollback()
-        raise _http_error(exc) from exc
-    return FileUploadResponse(files=[_asset_response(session, item.asset, include_shares=True) for item in extracted])
-
-
-@router.get("/{file_id}", response_model=FileAssetResponse)
-def get_file(
-    file_id: str,
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:read")),
-):
-    try:
-        asset = get_asset_for_user(session, tenant_id=principal.tenant_id, user_id=principal.user.id, asset_id=file_id, is_admin=_is_admin(principal))
-        return _asset_response(session, asset, include_shares=True)
-    except FileStorageError as exc:
-        raise _http_error(exc, not_found=True) from exc
-
-
-@router.get("/{file_id}/download")
-def download_file(
-    file_id: str,
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:download")),
-):
-    try:
-        asset = get_asset_for_user(session, tenant_id=principal.tenant_id, user_id=principal.user.id, asset_id=file_id, is_admin=_is_admin(principal))
-        data, _, blob = read_asset_bytes(session, asset)
-    except FileStorageError as exc:
-        raise _http_error(exc, not_found=True) from exc
-    headers = {"Content-Disposition": _attachment_disposition(asset.filename)}
-    return StreamingResponse(BytesIO(data), media_type=blob.content_type or "application/octet-stream", headers=headers)
-
-
-@router.delete("/{file_id}", response_model=BulkDeleteResponse)
-def delete_file(
-    file_id: str,
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:delete")),
-):
-    try:
-        asset = get_asset_for_user(session, tenant_id=principal.tenant_id, user_id=principal.user.id, asset_id=file_id, require_write=True, is_admin=_is_admin(principal))
-        count = soft_delete_assets(session, [asset])
-        session.commit()
-        return BulkDeleteResponse(deleted_count=count)
-    except FileStorageError as exc:
-        session.rollback()
-        raise _http_error(exc, not_found=True) from exc
-
-
-@router.post("/bulk-delete", response_model=BulkDeleteResponse)
-def bulk_delete_files(
-    payload: BulkDeleteRequest,
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:delete")),
-):
-    try:
-        assets = [
-            get_asset_for_user(session, tenant_id=principal.tenant_id, user_id=principal.user.id, asset_id=file_id, require_write=True, is_admin=_is_admin(principal))
-            for file_id in payload.file_ids
-        ]
-        count = soft_delete_assets(session, assets)
-        session.commit()
-        return BulkDeleteResponse(deleted_count=count)
-    except FileStorageError as exc:
-        session.rollback()
-        raise _http_error(exc) from exc
-
-
-@router.post("/{file_id}/shares", response_model=FileShareResponse)
-def create_share(
-    file_id: str,
-    payload: FileShareRequest,
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:share")),
-):
-    try:
-        asset = get_asset_for_user(session, tenant_id=principal.tenant_id, user_id=principal.user.id, asset_id=file_id, require_write=True, is_admin=_is_admin(principal))
-        share = share_file(
-            session,
-            tenant_id=principal.tenant_id,
-            asset=asset,
-            target_type=payload.target_type,
-            target_id=payload.target_id,
-            permission=payload.permission,
-            user_id=principal.user.id,
-        )
-        session.commit()
-        return FileShareResponse(
-            id=share.id,
-            target_type=share.target_type,
-            target_id=share.target_id,
-            permission=share.permission,
-            created_at=share.created_at.isoformat(),
-            revoked_at=share.revoked_at.isoformat() if share.revoked_at else None,
-        )
-    except FileStorageError as exc:
-        session.rollback()
-        raise _http_error(exc) from exc
-
-
-@router.post("/bulk-shares", response_model=BulkFileShareResponse)
-def create_bulk_shares(
-    payload: BulkFileShareRequest,
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:share")),
-):
-    try:
-        file_ids = list(dict.fromkeys(payload.file_ids))
-        assets = [
-            get_asset_for_user(session, tenant_id=principal.tenant_id, user_id=principal.user.id, asset_id=file_id, require_write=True, is_admin=_is_admin(principal))
-            for file_id in file_ids
-        ]
-        shares = share_files(
-            session,
-            tenant_id=principal.tenant_id,
-            assets=assets,
-            target_type=payload.target_type,
-            target_id=payload.target_id,
-            permission=payload.permission,
-            user_id=principal.user.id,
-        )
-        session.commit()
-        return BulkFileShareResponse(
-            shared_count=len(shares),
-            shares=[
-                FileShareResponse(
-                    id=share.id,
-                    target_type=share.target_type,
-                    target_id=share.target_id,
-                    permission=share.permission,
-                    created_at=share.created_at.isoformat(),
-                    revoked_at=share.revoked_at.isoformat() if share.revoked_at else None,
-                )
-                for share in shares
-            ],
-        )
-    except FileStorageError as exc:
-        session.rollback()
-        raise _http_error(exc) from exc
-
-
-
-@router.post("/bulk-rename", response_model=RenameResponse)
-def bulk_rename(
-    payload: RenameRequest,
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:organize")),
-):
-    try:
-        plan = rename_selection(
-            session,
-            tenant_id=principal.tenant_id,
-            user_id=principal.user.id,
-            file_ids=payload.file_ids,
-            folder_paths=payload.folder_paths,
-            owner_type=payload.owner_type,
-            owner_id=payload.owner_id,
-            mode=payload.mode,
-            new_name=payload.new_name,
-            find=payload.find,
-            replacement=payload.replacement,
-            prefix=payload.prefix,
-            suffix=payload.suffix,
-            recursive=payload.recursive,
-            dry_run=payload.dry_run,
-            is_admin=_is_admin(principal),
-        )
-        if not payload.dry_run:
-            session.commit()
-        return RenameResponse(
-            dry_run=payload.dry_run,
-            items=[
-                RenamePreviewItem(
-                    kind=item.kind,
-                    id=item.id,
-                    file_id=item.id if item.kind == "file" else None,
-                    folder_path=item.old_path if item.kind == "folder" else None,
-                    old_path=item.old_path,
-                    new_path=item.new_path,
-                )
-                for item in plan
-            ],
-        )
-    except (FileStorageError, UnsafeFilePathError, ValueError) as exc:
-        session.rollback()
-        raise _http_error(exc) from exc
-
-
-@router.post("/transfer", response_model=TransferResponse)
-def transfer_files(
-    payload: TransferRequest,
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:organize")),
-):
-    try:
-        files, folders = transfer_selection(
-            session,
-            tenant_id=principal.tenant_id,
-            user_id=principal.user.id,
-            operation=payload.operation,
-            file_ids=payload.file_ids,
-            folder_paths=payload.folder_paths,
-            source_owner_type=payload.source_owner_type,
-            source_owner_id=payload.source_owner_id,
-            target_owner_type=payload.target_owner_type,
-            target_owner_id=payload.target_owner_id,
-            target_folder=payload.target_folder,
-            conflict_strategy=payload.conflict_strategy,
-            conflict_resolutions=_conflict_resolutions(payload.conflict_resolutions),
-            is_admin=_is_admin(principal),
-        )
-        session.commit()
-        return TransferResponse(operation=payload.operation, files=files, folders=folders)
-    except (FileStorageError, UnsafeFilePathError, ValueError) as exc:
-        session.rollback()
-        raise _http_error(exc) from exc
-
-
-@router.post("/archive.zip")
-def download_archive(
-    payload: ArchiveRequest,
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:download")),
-):
-    try:
-        assets = [
-            get_asset_for_user(session, tenant_id=principal.tenant_id, user_id=principal.user.id, asset_id=file_id, is_admin=_is_admin(principal))
-            for file_id in payload.file_ids
-        ]
-        tmp = tempfile.NamedTemporaryFile(prefix="multimailer-files-", suffix=".zip", delete=False)
-        tmp_path = tmp.name
-        tmp.close()
-        try:
-            create_zip_file(session, assets, tmp_path)
-        except Exception:
-            _cleanup_temp_file(tmp_path)
-            raise
-    except FileStorageError as exc:
-        raise _http_error(exc) from exc
-    filename = filename_from_path(normalize_logical_path(payload.filename, fallback_filename="files.zip"))
-    headers = {"Content-Disposition": _attachment_disposition(filename)}
-    return FileResponse(tmp_path, media_type="application/zip", headers=headers, background=BackgroundTask(_cleanup_temp_file, tmp_path))
-
-
-@router.post("/resolve-patterns", response_model=PatternResolveResponse)
-def resolve_file_patterns(
-    payload: PatternResolveRequest,
-    session: Session = Depends(get_session),
-    principal: ApiPrincipal = Depends(require_scope("files:file:read")),
-):
-    _ensure_list_owner_access(session, principal, payload.owner_type, payload.owner_id)
-    _ensure_campaign_file_access(session, principal, payload.campaign_id)
-    try:
-        assets = list_assets_for_user(
-            session,
-            tenant_id=principal.tenant_id,
-            user_id=principal.user.id,
-            owner_type=payload.owner_type,
-            owner_id=payload.owner_id,
-            campaign_id=payload.campaign_id,
-            path_prefix=payload.path_prefix,
-            is_admin=_is_admin(principal),
-        )
-        resolved, unmatched = resolve_patterns(assets, payload.patterns, base_path=payload.path_prefix, case_sensitive=payload.case_sensitive)
-        return PatternResolveResponse(
-            patterns=[PatternMatchResponse(pattern=item.pattern, matches=[_asset_response(session, asset) for asset in item.matches]) for item in resolved],
-            unmatched=[_asset_response(session, asset) for asset in unmatched] if payload.include_unmatched else [],
-        )
-    except (FileStorageError, UnsafeFilePathError, ValueError) as exc:
-        raise _http_error(exc) from exc
+    router.routes.extend(workflow_router.routes)

src/govoplan_files/backend/routes/__init__.py

@@ -0,0 +1 @@
+"""Focused HTTP route modules for the Files API."""

src/govoplan_files/backend/routes/assets.py

@@ -0,0 +1,175 @@
+from __future__ import annotations
+
+from io import BytesIO
+from fastapi import APIRouter, Depends
+from fastapi.responses import StreamingResponse
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal, require_scope
+from govoplan_files.backend.schemas import (
+    BulkDeleteRequest,
+    BulkDeleteResponse,
+    FileAssetResponse,
+)
+from govoplan_core.db.session import get_session
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.files import (
+    get_asset_for_user,
+    read_asset_bytes,
+    read_asset_version_bytes,
+    soft_delete_assets,
+)
+
+
+from govoplan_files.backend.route_support import (
+    _asset_response,
+    _attachment_disposition,
+    _audit_connector_event,
+    _http_error,
+    _is_admin,
+)
+
+router = APIRouter(prefix="/files", tags=["files"])
+
+
+@router.get("/{file_id}", response_model=FileAssetResponse)
+def get_file(
+    file_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:read")),
+):
+    try:
+        asset = get_asset_for_user(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            asset_id=file_id,
+            is_admin=_is_admin(principal),
+        )
+        return _asset_response(session, asset, include_shares=True)
+    except FileStorageError as exc:
+        raise _http_error(exc, not_found=True) from exc
+
+
+@router.get("/{file_id}/download")
+def download_file(
+    file_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:download")),
+):
+    try:
+        asset = get_asset_for_user(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            asset_id=file_id,
+            is_admin=_is_admin(principal),
+        )
+        data, version, blob = read_asset_bytes(session, asset)
+        _audit_connector_event(
+            session,
+            principal,
+            action="files.connector.accessed",
+            asset=asset,
+            version=version,
+            blob=blob,
+            operation="download",
+            commit=True,
+        )
+    except FileStorageError as exc:
+        raise _http_error(exc, not_found=True) from exc
+    headers = {"Content-Disposition": _attachment_disposition(asset.filename)}
+    return StreamingResponse(
+        BytesIO(data),
+        media_type=blob.content_type or "application/octet-stream",
+        headers=headers,
+    )
+
+
+@router.get("/{file_id}/versions/{version_id}/download")
+def download_file_version(
+    file_id: str,
+    version_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:download")),
+):
+    try:
+        asset = get_asset_for_user(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            asset_id=file_id,
+            is_admin=_is_admin(principal),
+        )
+        data, version, blob = read_asset_version_bytes(session, asset, version_id)
+        _audit_connector_event(
+            session,
+            principal,
+            action="files.connector.accessed",
+            asset=asset,
+            version=version,
+            blob=blob,
+            operation="download-version",
+            commit=True,
+        )
+    except FileStorageError as exc:
+        raise _http_error(exc, not_found=True) from exc
+    headers = {
+        "Content-Disposition": _attachment_disposition(
+            version.filename_at_upload or asset.filename
+        )
+    }
+    return StreamingResponse(
+        BytesIO(data),
+        media_type=blob.content_type or "application/octet-stream",
+        headers=headers,
+    )
+
+
+@router.delete("/{file_id}", response_model=BulkDeleteResponse)
+def delete_file(
+    file_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:delete")),
+):
+    try:
+        asset = get_asset_for_user(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            asset_id=file_id,
+            require_write=True,
+            is_admin=_is_admin(principal),
+        )
+        count = soft_delete_assets(session, [asset])
+        session.commit()
+        return BulkDeleteResponse(deleted_count=count)
+    except FileStorageError as exc:
+        session.rollback()
+        raise _http_error(exc, not_found=True) from exc
+
+
+@router.post("/bulk-delete", response_model=BulkDeleteResponse)
+def bulk_delete_files(
+    payload: BulkDeleteRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:delete")),
+):
+    try:
+        assets = [
+            get_asset_for_user(
+                session,
+                tenant_id=principal.tenant_id,
+                user_id=principal.user.id,
+                asset_id=file_id,
+                require_write=True,
+                is_admin=_is_admin(principal),
+            )
+            for file_id in payload.file_ids
+        ]
+        count = soft_delete_assets(session, assets)
+        session.commit()
+        return BulkDeleteResponse(deleted_count=count)
+    except FileStorageError as exc:
+        session.rollback()
+        raise _http_error(exc) from exc

src/govoplan_files/backend/routes/connector_io.py

@@ -0,0 +1,631 @@
+from __future__ import annotations
+
+import json
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal, require_any_scope, require_scope
+from govoplan_core.audit.logging import audit_from_principal
+from govoplan_files.backend.schemas import (
+    FileConnectorBrowseItem,
+    FileConnectorBrowseResponse,
+    FileConnectorFolderSyncItemResponse,
+    FileConnectorFolderSyncRequest,
+    FileConnectorFolderSyncResponse,
+    FileConnectorFolderSyncSummary,
+    FileConnectorImportRequest,
+    FileConnectorSyncResponse,
+    FileConnectorWriteRequest,
+    FileConnectorWriteResponse,
+    FileUploadResponse,
+)
+from govoplan_core.db.session import get_session
+from govoplan_files.backend.storage.paths import UnsafeFilePathError
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.connector_browse import (
+    ConnectorBrowseError,
+    ConnectorBrowseUnsupported,
+    browse_connector_profile,
+    normalize_connector_browse_path,
+)
+from govoplan_files.backend.storage.connector_imports import (
+    ConnectorImportError,
+    ConnectorImportUnsupported,
+)
+from govoplan_files.backend.storage.connector_folder_sync import (
+    connector_relative_path,
+    discover_connector_folder,
+    join_connector_path,
+)
+from govoplan_files.backend.storage.connector_deployment import (
+    connector_effective_endpoint_url,
+)
+from govoplan_files.backend.storage.connector_policy import (
+    ConnectorAccessRequest,
+    ConnectorPolicyDenied,
+    connector_policy_decision,
+)
+from govoplan_files.backend.storage.files import (
+    create_file_asset,
+    get_asset_for_user,
+    read_asset_bytes,
+    sync_file_asset_from_source,
+)
+from govoplan_files.backend.storage.connector_spaces import (
+    connector_space_owner_id,
+    get_connector_space_for_user,
+)
+from govoplan_files.backend.storage.connector_writes import write_connector_file
+
+
+from govoplan_files.backend.route_support import (
+    _asset_response,
+    _audit_connector_imports,
+    _audit_connector_sync,
+    _connector_browse_next_token,
+    _connector_policy_error,
+    _connector_space_policy_decision,
+    _download_connector_payload,
+    _ensure_campaign_file_access,
+    _http_error,
+    _is_admin,
+    _visible_connector_profile,
+)
+
+router = APIRouter(prefix="/files", tags=["files"])
+
+
+@router.post(
+    "/connector-spaces/{space_id}/sync",
+    response_model=FileConnectorFolderSyncResponse,
+)
+def sync_connector_space_folder(
+    space_id: str,
+    payload: FileConnectorFolderSyncRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:upload")),
+):
+    try:
+        space = get_connector_space_for_user(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            space_id=space_id,
+            is_admin=_is_admin(principal),
+        )
+    except FileStorageError as exc:
+        session.rollback()
+        raise _http_error(exc, not_found=True) from exc
+
+    try:
+        if space.sync_mode != "manual":
+            raise FileStorageError("This connector space is not configured for manual sync")
+        profile = _visible_connector_profile(
+            session, principal, space.connector_profile_id
+        )
+        remote_path = join_connector_path(space.remote_path, payload.path)
+        target_folder = join_connector_path(payload.target_folder)
+        decision = _connector_space_policy_decision(
+            profile,
+            library_id=space.library_id,
+            remote_path=remote_path,
+            operation="sync",
+        )
+        if not decision.allowed:
+            raise ConnectorPolicyDenied(decision)
+        discovery = discover_connector_folder(
+            profile,
+            path=remote_path,
+            library_id=space.library_id,
+            recursive=payload.recursive,
+            max_files=payload.max_files,
+            max_depth=payload.max_depth,
+        )
+    except ConnectorPolicyDenied as exc:
+        session.rollback()
+        raise _connector_policy_error(exc) from exc
+    except ConnectorBrowseUnsupported as exc:
+        session.rollback()
+        raise HTTPException(
+            status_code=status.HTTP_501_NOT_IMPLEMENTED, detail=str(exc)
+        ) from exc
+    except (ConnectorBrowseError, FileStorageError, ValueError) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+
+    owner_id = connector_space_owner_id(space)
+    items: list[FileConnectorFolderSyncItemResponse] = [
+        FileConnectorFolderSyncItemResponse(
+            source_path=skipped.path,
+            action="skipped",
+            detail=skipped.reason,
+        )
+        for skipped in discovery.skipped
+    ]
+    counts = {
+        "created": 0,
+        "updated": 0,
+        "unchanged": 0,
+        "skipped": len(discovery.skipped),
+        "conflicts": 0,
+        "policy_denied": 0,
+        "failed": 0,
+    }
+
+    for source in discovery.files:
+        source_path = normalize_connector_browse_path(source.path)
+        try:
+            relative_path = connector_relative_path(
+                space_root=space.remote_path,
+                item_path=source_path,
+            )
+            target_path = join_connector_path(target_folder, relative_path)
+        except (ConnectorBrowseError, ValueError) as exc:
+            counts["failed"] += 1
+            items.append(
+                FileConnectorFolderSyncItemResponse(
+                    source_path=source_path,
+                    action="failed",
+                    detail=str(exc),
+                )
+            )
+            continue
+
+        try:
+            with session.begin_nested():
+                file_payload = FileConnectorImportRequest(
+                    library_id=space.library_id or "",
+                    path=source_path,
+                    owner_type=space.owner_type,
+                    owner_id=owner_id,
+                    target_path=target_path,
+                    conflict_strategy=payload.conflict_strategy,
+                    source_revision=source.etag,
+                    metadata={
+                        **dict(source.metadata),
+                        **payload.metadata,
+                        "connector_space_id": space.id,
+                        "browse_name": source.name,
+                        "browse_path": source_path,
+                        "browse_modified_at": source.modified_at,
+                        "browse_etag": source.etag,
+                        "folder_sync": True,
+                    },
+                )
+                _source_path, downloaded, metadata = _download_connector_payload(
+                    profile, file_payload, operation="sync"
+                )
+                stored, sync_action, previous_version_id = (
+                    sync_file_asset_from_source(
+                        session,
+                        tenant_id=principal.tenant_id,
+                        owner_type=space.owner_type,
+                        owner_id=owner_id,
+                        user_id=principal.user.id,
+                        filename=downloaded.filename,
+                        data=downloaded.data,
+                        display_path=target_path,
+                        content_type=downloaded.content_type,
+                        metadata=metadata,
+                        conflict_strategy=payload.conflict_strategy,
+                        is_admin=_is_admin(principal),
+                    )
+                )
+                _audit_connector_sync(
+                    session,
+                    principal,
+                    stored.asset,
+                    sync_action=sync_action,
+                    previous_version_id=previous_version_id,
+                )
+                file_response = _asset_response(
+                    session, stored.asset, include_shares=True
+                )
+            counts[sync_action] += 1
+            items.append(
+                FileConnectorFolderSyncItemResponse(
+                    source_path=source_path,
+                    target_path=target_path,
+                    action=sync_action,
+                    file=file_response,
+                    previous_version_id=previous_version_id,
+                    current_version_id=stored.version.id,
+                    source_revision=file_response.source_revision,
+                )
+            )
+        except ConnectorPolicyDenied as exc:
+            counts["policy_denied"] += 1
+            items.append(
+                FileConnectorFolderSyncItemResponse(
+                    source_path=source_path,
+                    target_path=target_path,
+                    action="policy_denied",
+                    source_revision=source.etag,
+                    detail=str(exc),
+                    policy_decision=exc.decision.to_dict(),
+                )
+            )
+        except FileStorageError as exc:
+            detail = str(exc)
+            if detail.startswith("Skipped upload target:"):
+                action = "skipped"
+                counts["skipped"] += 1
+            elif detail.startswith("Target file already exists:"):
+                action = "conflict"
+                counts["conflicts"] += 1
+            else:
+                action = "failed"
+                counts["failed"] += 1
+            items.append(
+                FileConnectorFolderSyncItemResponse(
+                    source_path=source_path,
+                    target_path=target_path,
+                    action=action,
+                    source_revision=source.etag,
+                    detail=detail,
+                )
+            )
+        except (
+            ConnectorImportError,
+            UnsafeFilePathError,
+            OSError,
+            ValueError,
+            json.JSONDecodeError,
+        ) as exc:
+            counts["failed"] += 1
+            items.append(
+                FileConnectorFolderSyncItemResponse(
+                    source_path=source_path,
+                    target_path=target_path,
+                    action="failed",
+                    source_revision=source.etag,
+                    detail=str(exc),
+                )
+            )
+
+    summary = FileConnectorFolderSyncSummary(
+        discovered=len(discovery.files),
+        **counts,
+    )
+    audit_from_principal(
+        session,
+        principal,
+        action="files.connector.folder_synced",
+        object_type="file_connector_space",
+        object_id=space.id,
+        details={
+            "connector_profile_id": profile.id,
+            "provider": profile.provider,
+            "library_id": space.library_id,
+            "remote_path": remote_path,
+            "target_folder": target_folder,
+            "recursive": payload.recursive,
+            "truncated": discovery.truncated,
+            "summary": summary.model_dump(),
+            "results": [
+                {
+                    "source_path": item.source_path,
+                    "target_path": item.target_path,
+                    "action": item.action,
+                    "file_id": item.file.id if item.file else None,
+                    "current_version_id": item.current_version_id,
+                }
+                for item in items
+            ],
+        },
+    )
+    session.commit()
+    return FileConnectorFolderSyncResponse(
+        connector_space_id=space.id,
+        connector_profile_id=profile.id,
+        provider=profile.provider,
+        remote_path=remote_path,
+        target_folder=target_folder,
+        recursive=payload.recursive,
+        truncated=discovery.truncated,
+        summary=summary,
+        items=items,
+    )
+
+
+@router.post(
+    "/connector-spaces/{space_id}/write-back",
+    response_model=FileConnectorWriteResponse,
+)
+def write_back_connector_file(
+    space_id: str,
+    payload: FileConnectorWriteRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:connector:write")),
+):
+    try:
+        space = get_connector_space_for_user(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            space_id=space_id,
+            is_admin=_is_admin(principal),
+        )
+        if space.read_only:
+            raise FileStorageError("This connector space is read-only")
+        profile = _visible_connector_profile(
+            session, principal, space.connector_profile_id
+        )
+        requested_path = normalize_connector_browse_path(payload.remote_path)
+        remote_path = normalize_connector_browse_path(
+            "/".join(part for part in (space.remote_path, requested_path) if part)
+        )
+        decision = connector_policy_decision(
+            ConnectorAccessRequest(
+                connector_id=profile.id,
+                credential_id=profile.credential_profile_id,
+                provider=profile.provider,
+                external_path=remote_path,
+                external_url=connector_effective_endpoint_url(
+                    provider=profile.provider,
+                    endpoint_url=profile.endpoint_url,
+                    metadata=profile.metadata,
+                ),
+                operation="write",
+            ),
+            profile.policy_sources,
+        )
+        if not decision.allowed:
+            raise ConnectorPolicyDenied(decision)
+        asset = get_asset_for_user(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            asset_id=payload.file_id,
+            require_write=True,
+            is_admin=_is_admin(principal),
+        )
+        data, version, blob = read_asset_bytes(session, asset)
+        connector_library_id = space.library_id
+        content_type = blob.content_type
+        # Close the read snapshot before the independent recovery transaction
+        # records authority for the external effect. This avoids upgrading an
+        # older SQLite read snapshot after the ledger commit.
+        session.commit()
+        result = write_connector_file(
+            profile,
+            tenant_id=principal.tenant_id,
+            library_id=connector_library_id,
+            remote_path=remote_path,
+            data=data,
+            content_type=content_type,
+            expected_revision=payload.expected_revision,
+            idempotency_key=payload.idempotency_key,
+        )
+        audit_from_principal(
+            session,
+            principal,
+            action="files.connector.written",
+            object_type="file",
+            object_id=asset.id,
+            details={
+                "file_version_id": version.id,
+                "file_blob_id": blob.id,
+                "checksum_sha256": blob.checksum_sha256,
+                "connector_space_id": space.id,
+                "connector_profile_id": profile.id,
+                "remote_path": remote_path,
+                "recovery_operation_id": result.recovery_operation_id,
+                "recovery_status": result.status,
+                "revision": result.revision,
+            },
+        )
+        session.commit()
+        return FileConnectorWriteResponse(
+            recovery_operation_id=result.recovery_operation_id,
+            status=result.status,
+            replayed=result.replayed,
+            provider=result.provider,
+            remote_path=result.remote_path,
+            revision=result.revision,
+            checksum_sha256=result.checksum_sha256,
+            size_bytes=result.size_bytes,
+        )
+    except ConnectorPolicyDenied as exc:
+        session.rollback()
+        raise _connector_policy_error(exc) from exc
+    except (FileStorageError, ConnectorBrowseError) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+
+
+@router.post(
+    "/connectors/profiles/{profile_id}/import", response_model=FileUploadResponse
+)
+def import_connector_file(
+    profile_id: str,
+    payload: FileConnectorImportRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:upload")),
+):
+    try:
+        if payload.campaign_id:
+            _ensure_campaign_file_access(session, principal, payload.campaign_id)
+        profile = _visible_connector_profile(
+            session, principal, profile_id, campaign_id=payload.campaign_id
+        )
+        _source_path, downloaded, metadata = _download_connector_payload(
+            profile, payload, operation="import"
+        )
+        target_owner = payload.owner_id or principal.user.id
+        stored = create_file_asset(
+            session,
+            tenant_id=principal.tenant_id,
+            owner_type=payload.owner_type,
+            owner_id=target_owner,
+            user_id=principal.user.id,
+            filename=downloaded.filename,
+            data=downloaded.data,
+            folder=payload.target_folder,
+            display_path=payload.target_path,
+            content_type=downloaded.content_type,
+            metadata=metadata,
+            campaign_id=payload.campaign_id,
+            conflict_strategy=payload.conflict_strategy,
+            is_admin=_is_admin(principal),
+        )
+        _audit_connector_imports(session, principal, [stored.asset])
+        session.commit()
+    except ConnectorPolicyDenied as exc:
+        session.rollback()
+        raise _connector_policy_error(exc) from exc
+    except ConnectorImportUnsupported as exc:
+        session.rollback()
+        raise HTTPException(
+            status_code=status.HTTP_501_NOT_IMPLEMENTED, detail=str(exc)
+        ) from exc
+    except (
+        ConnectorImportError,
+        FileStorageError,
+        UnsafeFilePathError,
+        ValueError,
+        json.JSONDecodeError,
+    ) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+    return FileUploadResponse(
+        files=[_asset_response(session, stored.asset, include_shares=True)]
+    )
+
+
+@router.post(
+    "/connectors/profiles/{profile_id}/sync", response_model=FileConnectorSyncResponse
+)
+def sync_connector_file(
+    profile_id: str,
+    payload: FileConnectorImportRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:upload")),
+):
+    try:
+        if payload.campaign_id:
+            _ensure_campaign_file_access(session, principal, payload.campaign_id)
+        profile = _visible_connector_profile(
+            session, principal, profile_id, campaign_id=payload.campaign_id
+        )
+        _source_path, downloaded, metadata = _download_connector_payload(
+            profile, payload, operation="sync"
+        )
+        target_owner = payload.owner_id or principal.user.id
+        stored, sync_action, previous_version_id = sync_file_asset_from_source(
+            session,
+            tenant_id=principal.tenant_id,
+            owner_type=payload.owner_type,
+            owner_id=target_owner,
+            user_id=principal.user.id,
+            filename=downloaded.filename,
+            data=downloaded.data,
+            folder=payload.target_folder,
+            display_path=payload.target_path,
+            content_type=downloaded.content_type,
+            metadata=metadata,
+            campaign_id=payload.campaign_id,
+            conflict_strategy=payload.conflict_strategy,
+            is_admin=_is_admin(principal),
+        )
+        _audit_connector_sync(
+            session,
+            principal,
+            stored.asset,
+            sync_action=sync_action,
+            previous_version_id=previous_version_id,
+        )
+        session.commit()
+    except ConnectorPolicyDenied as exc:
+        session.rollback()
+        raise _connector_policy_error(exc) from exc
+    except ConnectorImportUnsupported as exc:
+        session.rollback()
+        raise HTTPException(
+            status_code=status.HTTP_501_NOT_IMPLEMENTED, detail=str(exc)
+        ) from exc
+    except (
+        ConnectorImportError,
+        FileStorageError,
+        UnsafeFilePathError,
+        ValueError,
+        json.JSONDecodeError,
+    ) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+    return FileConnectorSyncResponse(
+        file=_asset_response(session, stored.asset, include_shares=True),
+        action=sync_action,
+        previous_version_id=previous_version_id,
+        current_version_id=stored.version.id,
+    )
+
+
+@router.get(
+    "/connectors/profiles/{profile_id}/browse",
+    response_model=FileConnectorBrowseResponse,
+)
+def browse_connector_profile_items(
+    profile_id: str,
+    path: str | None = None,
+    library_id: str | None = None,
+    continuation_token: str | None = None,
+    campaign_id: str | None = None,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(
+        require_any_scope(
+            "files:file:read",
+            "files:file:upload",
+            "files:file:download",
+            "files:file:admin",
+            "system:settings:read",
+            "admin:settings:read",
+        )
+    ),
+):
+    try:
+        profile = _visible_connector_profile(
+            session, principal, profile_id, campaign_id=campaign_id
+        )
+        browse_path = normalize_connector_browse_path(path)
+        decision = connector_policy_decision(
+            ConnectorAccessRequest(
+                connector_id=profile.id,
+                credential_id=profile.credential_profile_id,
+                provider=profile.provider,
+                external_path=browse_path,
+                external_url=connector_effective_endpoint_url(
+                    provider=profile.provider,
+                    endpoint_url=profile.endpoint_url,
+                    metadata=profile.metadata,
+                ),
+                operation="browse",
+            ),
+            profile.policy_sources,
+        )
+        if not decision.allowed:
+            raise ConnectorPolicyDenied(decision)
+        items = browse_connector_profile(
+            profile,
+            path=browse_path,
+            library_id=library_id,
+            continuation_token=continuation_token,
+        )
+    except ConnectorPolicyDenied as exc:
+        raise _connector_policy_error(exc) from exc
+    except ConnectorBrowseUnsupported as exc:
+        raise HTTPException(
+            status_code=status.HTTP_501_NOT_IMPLEMENTED, detail=str(exc)
+        ) from exc
+    except (ConnectorBrowseError, OSError, ValueError, json.JSONDecodeError) as exc:
+        raise _http_error(exc) from exc
+    return FileConnectorBrowseResponse(
+        profile_id=profile.id,
+        provider=profile.provider,
+        path=browse_path,
+        library_id=library_id,
+        next_continuation_token=_connector_browse_next_token(items),
+        has_more=any(bool(item.metadata.get("listing_truncated")) for item in items),
+        decision=decision.to_dict(),
+        items=[FileConnectorBrowseItem(**item.to_response()) for item in items],
+    )

src/govoplan_files/backend/routes/connector_profiles.py

@@ -0,0 +1,261 @@
+from __future__ import annotations
+
+import json
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal, require_any_scope
+from govoplan_files.backend.change_tracking import (
+    FILES_CONNECTOR_PROFILES_COLLECTION,
+)
+from govoplan_files.backend.schemas import (
+    FileConnectorProfileResponse,
+    FileConnectorProfileUpdateRequest,
+)
+from govoplan_core.db.session import get_session
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.connector_credential_deletion import (
+    delete_connector_profile_row,
+)
+from govoplan_files.backend.storage.connector_deployment import (
+    connector_effective_endpoint_url,
+)
+from govoplan_files.backend.storage.connector_profile_store import (
+    connector_profile_from_row,
+    get_connector_profile_row,
+    update_connector_profile_row,
+)
+from govoplan_files.backend.storage.connector_policy import (
+    ConnectorPolicyDenied,
+)
+
+
+from govoplan_files.backend.route_support import (
+    FILES_CONNECTOR_PROFILE_RESOURCE,
+    _can_read_disabled_connector_profiles,
+    _connector_policy_error,
+    _credential_row_for_profile,
+    _ensure_connector_configuration_allowed,
+    _ensure_connector_local_policy_allowed,
+    _http_error,
+    _record_connector_settings_change,
+    _require_connector_profile_write,
+    _visible_connector_profile,
+)
+
+router = APIRouter(prefix="/files", tags=["files"])
+
+
+@router.get(
+    "/connectors/profiles/{profile_id}", response_model=FileConnectorProfileResponse
+)
+def get_connector_profile(
+    profile_id: str,
+    campaign_id: str | None = None,
+    include_disabled: bool = False,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(
+        require_any_scope(
+            "files:file:read",
+            "files:file:upload",
+            "files:file:download",
+            "files:file:admin",
+            "system:settings:read",
+            "admin:settings:read",
+        )
+    ),
+):
+    try:
+        profile = _visible_connector_profile(
+            session,
+            principal,
+            profile_id,
+            campaign_id=campaign_id,
+            include_disabled=include_disabled
+            and _can_read_disabled_connector_profiles(principal),
+            include_effective_policy=False,
+        )
+    except (OSError, ValueError, json.JSONDecodeError) as exc:
+        raise _http_error(exc) from exc
+    return FileConnectorProfileResponse(**profile.to_response())
+
+
+@router.patch(
+    "/connectors/profiles/{profile_id}", response_model=FileConnectorProfileResponse
+)
+def update_connector_profile(
+    profile_id: str,
+    payload: FileConnectorProfileUpdateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(
+        require_any_scope(
+            "files:file:admin", "system:settings:write", "admin:settings:write"
+        )
+    ),
+):
+    try:
+        row = get_connector_profile_row(
+            session,
+            tenant_id=principal.tenant_id,
+            profile_id=profile_id,
+            include_disabled=True,
+        )
+    except FileStorageError as exc:
+        raise _http_error(exc, not_found=True) from exc
+    _require_connector_profile_write(principal, row.scope_type)
+    credentials = payload.credentials
+    try:
+        credential_profile_id = (
+            payload.credential_profile_id
+            if payload.credential_profile_id is not None
+            else row.credential_profile_id
+        )
+        provider = payload.provider if payload.provider is not None else row.provider
+        credential_row = _credential_row_for_profile(
+            session,
+            principal,
+            credential_profile_id=credential_profile_id,
+            provider=provider,
+            profile_id=row.id,
+            scope_type=row.scope_type,
+            scope_id=row.scope_id,
+            include_disabled=True,
+        )
+        _ensure_connector_configuration_allowed(
+            session,
+            principal,
+            connector_id=row.id,
+            credential_id=credential_profile_id,
+            provider=provider,
+            endpoint_url=connector_effective_endpoint_url(
+                provider=provider,
+                endpoint_url=payload.endpoint_url
+                if payload.endpoint_url is not None
+                else row.endpoint_url,
+                metadata=payload.metadata
+                if payload.metadata is not None
+                else row.metadata_,
+            ),
+            base_path=payload.base_path
+            if payload.base_path is not None
+            else row.base_path,
+            scope_type=row.scope_type,
+            scope_id=row.scope_id,
+            operation="configure",
+        )
+        if payload.policy is not None:
+            _ensure_connector_local_policy_allowed(
+                session,
+                principal,
+                scope_type=row.scope_type,
+                scope_id=row.scope_id,
+                policy=payload.policy,
+            )
+        update_connector_profile_row(
+            session,
+            row,
+            user_id=principal.user.id,
+            label=payload.label,
+            provider=payload.provider,
+            endpoint_url=payload.endpoint_url,
+            base_path=payload.base_path,
+            enabled=payload.enabled,
+            credential_profile_id=payload.credential_profile_id,
+            credential_mode=payload.credential_mode,
+            username=credentials.username if credentials else None,
+            password=credentials.password if credentials else None,
+            token=credentials.token if credentials else None,
+            password_env=credentials.password_env if credentials else None,
+            token_env=credentials.token_env if credentials else None,
+            secret_ref=credentials.secret_ref if credentials else None,
+            clear_password=payload.clear_password,
+            clear_token=payload.clear_token,
+            capabilities=payload.capabilities,
+            policy=payload.policy,
+            metadata=payload.metadata,
+        )
+        _record_connector_settings_change(
+            session,
+            collection=FILES_CONNECTOR_PROFILES_COLLECTION,
+            resource_type=FILES_CONNECTOR_PROFILE_RESOURCE,
+            resource_id=row.id,
+            operation="updated",
+            principal=principal,
+            tenant_id=row.tenant_id,
+            payload={
+                "scope_type": row.scope_type,
+                "scope_id": row.scope_id,
+                "provider": row.provider,
+            },
+        )
+        session.commit()
+        session.refresh(row)
+        return FileConnectorProfileResponse(
+            **connector_profile_from_row(
+                row, credential_row=credential_row
+            ).to_response()
+        )
+    except ConnectorPolicyDenied as exc:
+        session.rollback()
+        raise _connector_policy_error(exc) from exc
+    except (FileStorageError, ValueError, json.JSONDecodeError) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+
+
+@router.delete(
+    "/connectors/profiles/{profile_id}", response_model=FileConnectorProfileResponse
+)
+def deactivate_connector_profile(
+    profile_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(
+        require_any_scope(
+            "files:file:admin", "system:settings:write", "admin:settings:write"
+        )
+    ),
+):
+    try:
+        row = get_connector_profile_row(
+            session,
+            tenant_id=principal.tenant_id,
+            profile_id=profile_id,
+            include_disabled=True,
+        )
+    except FileStorageError as exc:
+        raise _http_error(exc, not_found=True) from exc
+    _require_connector_profile_write(principal, row.scope_type)
+    try:
+        changed = delete_connector_profile_row(
+            session,
+            row,
+            deletion_reason="api_delete",
+            user_id=principal.user.id,
+            api_key_id=principal.api_key.id if principal.api_key else None,
+        )
+        if changed:
+            _record_connector_settings_change(
+                session,
+                collection=FILES_CONNECTOR_PROFILES_COLLECTION,
+                resource_type=FILES_CONNECTOR_PROFILE_RESOURCE,
+                resource_id=row.id,
+                operation="deleted",
+                principal=principal,
+                tenant_id=row.tenant_id,
+                payload={
+                    "scope_type": row.scope_type,
+                    "scope_id": row.scope_id,
+                    "provider": row.provider,
+                },
+            )
+        session.commit()
+        session.refresh(row)
+        return FileConnectorProfileResponse(
+            **connector_profile_from_row(row).to_response()
+        )
+    except FileStorageError as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+    except Exception:
+        session.rollback()
+        raise

src/govoplan_files/backend/routes/connector_settings.py

@@ -0,0 +1,852 @@
+from __future__ import annotations
+
+import json
+from typing import Literal
+from fastapi import APIRouter, Depends, Query, status
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal, require_any_scope
+from govoplan_files.backend.change_tracking import (
+    FILES_CONNECTOR_CREDENTIALS_COLLECTION,
+    FILES_CONNECTOR_POLICIES_COLLECTION,
+    FILES_CONNECTOR_PROFILES_COLLECTION,
+)
+from govoplan_files.backend.schemas import (
+    FileConnectorCredentialCreateRequest,
+    FileConnectorCredentialResponse,
+    FileConnectorCredentialsResponse,
+    FileConnectorCredentialUpdateRequest,
+    FileConnectorDiscoveryRequest,
+    FileConnectorDiscoveryResponse,
+    FileConnectorSettingsDeltaResponse,
+    FileConnectorPolicyEvaluateRequest,
+    FileConnectorPolicyEvaluateResponse,
+    FileConnectorPolicyResponse,
+    FileConnectorPolicyUpdateRequest,
+    FileConnectorProfileCreateRequest,
+    FileConnectorProfileResponse,
+    FileConnectorProfilesResponse,
+    FileConnectorProviderResponse,
+    FileConnectorProvidersResponse,
+)
+from govoplan_core.db.session import get_session
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.connector_credential_store import (
+    create_connector_credential_row,
+    get_connector_credential_row,
+    list_database_connector_credentials,
+    update_connector_credential_row,
+)
+from govoplan_files.backend.storage.connector_credential_deletion import (
+    delete_connector_credential_row,
+)
+from govoplan_files.backend.storage.connector_browse import (
+    ConnectorBrowseError,
+    ConnectorBrowseUnsupported,
+    browse_connector_profile,
+)
+from govoplan_files.backend.storage.connector_deployment import (
+    connector_effective_endpoint_url,
+    reject_api_controlled_deployment_references,
+)
+from govoplan_files.backend.storage.connector_profile_store import (
+    connector_profile_from_row,
+    create_connector_profile_row,
+)
+from govoplan_files.backend.storage.connector_providers import (
+    connector_provider_descriptors,
+)
+from govoplan_files.backend.storage.connector_policy import (
+    ConnectorAccessRequest,
+    ConnectorPolicyDenied,
+    connector_policy_decision,
+    connector_policy_sources_from_payload,
+)
+from govoplan_files.backend.storage.connector_policy_store import (
+    connector_policy_response,
+    set_connector_policy,
+)
+
+
+from govoplan_files.backend.route_support import (
+    FILES_CONNECTOR_CREDENTIAL_RESOURCE,
+    FILES_CONNECTOR_POLICY_RESOURCE,
+    FILES_CONNECTOR_PROFILE_RESOURCE,
+    _audit_connector_discovery_attempt,
+    _can_read_disabled_connector_profiles,
+    _connector_credential_response,
+    _connector_policy_error,
+    _credential_row_for_profile,
+    _discovery_profile_from_payload,
+    _ensure_campaign_file_access,
+    _ensure_connector_configuration_allowed,
+    _ensure_connector_credential_configuration_allowed,
+    _ensure_connector_local_policy_allowed,
+    _file_connector_policy_resource_id,
+    _file_connector_settings_entries,
+    _http_error,
+    _record_connector_settings_change,
+    _require_connector_credential_write,
+    _require_connector_policy_read,
+    _require_connector_profile_write,
+    _same_endpoint,
+    _visible_connector_profiles,
+    _webdav_discovery_candidates,
+)
+from govoplan_files.backend.services.connector_settings_delta import (
+    _full_file_connector_settings_delta_response,
+    _incremental_file_connector_settings_delta_response,
+)
+
+router = APIRouter(prefix="/files", tags=["files"])
+
+
+@router.post(
+    "/connector-policy/evaluate", response_model=FileConnectorPolicyEvaluateResponse
+)
+def evaluate_connector_policy(
+    payload: FileConnectorPolicyEvaluateRequest,
+    principal: ApiPrincipal = Depends(
+        require_any_scope("files:file:read", "files:file:upload", "files:file:download")
+    ),
+):
+    del principal
+    sources = connector_policy_sources_from_payload(
+        [item.model_dump(mode="json") for item in payload.policy_sources]
+    )
+    request = ConnectorAccessRequest.from_provenance(
+        payload.source_provenance.model_dump(mode="json", exclude_none=True),
+        operation=payload.operation,
+    )
+    return FileConnectorPolicyEvaluateResponse(
+        decision=connector_policy_decision(request, sources).to_dict()
+    )
+
+
+@router.get(
+    "/connectors/settings/delta", response_model=FileConnectorSettingsDeltaResponse
+)
+def connector_settings_delta(
+    scope_type: str = Query(default="tenant"),
+    scope_id: str | None = Query(default=None),
+    provider: str | None = None,
+    campaign_id: str | None = None,
+    include_disabled: bool = False,
+    include_inactive: bool = False,
+    owner_type: Literal["user", "group"] | None = None,
+    owner_id: str | None = None,
+    since: str | None = None,
+    limit: int = Query(default=100, ge=1, le=500),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(
+        require_any_scope(
+            "files:file:admin", "system:settings:read", "admin:settings:read"
+        )
+    ),
+):
+    scope_type = scope_type.strip().casefold()
+    _require_connector_policy_read(principal, scope_type)
+    try:
+        if since is None:
+            return _full_file_connector_settings_delta_response(
+                session,
+                principal,
+                scope_type=scope_type,
+                scope_id=scope_id,
+                provider=provider,
+                campaign_id=campaign_id,
+                include_disabled=include_disabled,
+                include_inactive=include_inactive,
+                owner_type=owner_type,
+                owner_id=owner_id,
+            )
+        entries, has_more = _file_connector_settings_entries(
+            session, tenant_id=principal.tenant_id, since=since, limit=limit
+        )
+        if entries is None:
+            return _full_file_connector_settings_delta_response(
+                session,
+                principal,
+                scope_type=scope_type,
+                scope_id=scope_id,
+                provider=provider,
+                campaign_id=campaign_id,
+                include_disabled=include_disabled,
+                include_inactive=include_inactive,
+                owner_type=owner_type,
+                owner_id=owner_id,
+            )
+        return _incremental_file_connector_settings_delta_response(
+            session,
+            principal,
+            entries=entries,
+            has_more=has_more,
+            scope_type=scope_type,
+            scope_id=scope_id,
+            provider=provider,
+            campaign_id=campaign_id,
+            include_disabled=include_disabled,
+            include_inactive=include_inactive,
+            owner_type=owner_type,
+            owner_id=owner_id,
+        )
+    except (FileStorageError, ValueError, json.JSONDecodeError) as exc:
+        raise _http_error(exc) from exc
+
+
+@router.get("/connectors/providers", response_model=FileConnectorProvidersResponse)
+def list_connector_providers(
+    principal: ApiPrincipal = Depends(
+        require_any_scope("files:file:read", "files:file:upload", "files:file:admin")
+    ),
+):
+    del principal
+    return FileConnectorProvidersResponse(
+        providers=[
+            FileConnectorProviderResponse(**item.to_response())
+            for item in connector_provider_descriptors()
+        ]
+    )
+
+
+@router.post("/connectors/discover", response_model=FileConnectorDiscoveryResponse)
+def discover_connector_endpoint(
+    payload: FileConnectorDiscoveryRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(
+        require_any_scope(
+            "files:file:admin", "system:settings:write", "admin:settings:write"
+        )
+    ),
+):
+    try:
+        reject_api_controlled_deployment_references(
+            password_env=payload.credentials.password_env,
+            token_env=payload.credentials.token_env,
+            secret_ref=payload.credentials.secret_ref,
+            metadata=payload.metadata,
+        )
+    except ValueError as exc:
+        raise _http_error(exc) from exc
+    if payload.provider not in {"webdav", "nextcloud"}:
+        return FileConnectorDiscoveryResponse(
+            provider=payload.provider,
+            endpoint_url=None,
+            base_path=payload.base_path,
+            status="unsupported",
+            message=f"Discovery is not implemented for {payload.provider} connectors yet",
+        )
+    candidates: list[dict[str, str]] = []
+    for endpoint_url in _webdav_discovery_candidates(payload):
+        profile = _discovery_profile_from_payload(
+            payload, endpoint_url, principal=principal
+        )
+        try:
+            _ensure_connector_configuration_allowed(
+                session,
+                principal,
+                connector_id=None,
+                credential_id=None,
+                provider=profile.provider,
+                endpoint_url=endpoint_url,
+                base_path=profile.base_path,
+                scope_type="tenant",
+                scope_id=principal.tenant_id,
+                operation="discover",
+            )
+            _audit_connector_discovery_attempt(
+                session,
+                principal,
+                provider=profile.provider,
+                endpoint_url=endpoint_url,
+                base_path=profile.base_path,
+            )
+            browse_connector_profile(profile, path=payload.base_path or "")
+        except ConnectorPolicyDenied as exc:
+            raise _connector_policy_error(exc) from exc
+        except (
+            ConnectorBrowseError,
+            ConnectorBrowseUnsupported,
+            OSError,
+            ValueError,
+            json.JSONDecodeError,
+        ) as exc:
+            message = str(exc)
+            if "credentials were rejected" in message.casefold():
+                if payload.require_valid_credentials:
+                    candidates.append(
+                        {
+                            "endpoint_url": endpoint_url,
+                            "status": "credentials_rejected",
+                            "message": "The endpoint exists, but the credentials were rejected.",
+                        }
+                    )
+                    return FileConnectorDiscoveryResponse(
+                        provider=payload.provider,
+                        endpoint_url=endpoint_url,
+                        base_path=payload.base_path,
+                        status="credentials_rejected",
+                        message="The endpoint was found, but login failed with these credentials.",
+                        candidates=candidates,
+                        metadata={"discovered_by": "webdav-auth-challenge"},
+                    )
+                candidates.append(
+                    {
+                        "endpoint_url": endpoint_url,
+                        "status": "found",
+                        "message": "The endpoint exists, but credentials are required or were rejected.",
+                    }
+                )
+                return FileConnectorDiscoveryResponse(
+                    provider=payload.provider,
+                    endpoint_url=endpoint_url,
+                    base_path=payload.base_path,
+                    status="found",
+                    message="The endpoint was found. Add working credentials before saving or testing the connection.",
+                    candidates=candidates,
+                    metadata={"discovered_by": "webdav-auth-challenge"},
+                )
+            candidates.append(
+                {"endpoint_url": endpoint_url, "status": "failed", "message": message}
+            )
+            continue
+        status_value = (
+            "usable" if _same_endpoint(endpoint_url, payload.endpoint_url) else "found"
+        )
+        message = (
+            "The supplied URL is directly usable."
+            if status_value == "usable"
+            else "A usable connector endpoint was discovered."
+        )
+        candidates.append(
+            {"endpoint_url": endpoint_url, "status": status_value, "message": message}
+        )
+        return FileConnectorDiscoveryResponse(
+            provider=payload.provider,
+            endpoint_url=endpoint_url,
+            base_path=payload.base_path,
+            status=status_value,
+            message=message,
+            candidates=candidates,
+            metadata={"discovered_by": "webdav-propfind"},
+        )
+    return FileConnectorDiscoveryResponse(
+        provider=payload.provider,
+        endpoint_url=None,
+        base_path=payload.base_path,
+        status="not_found",
+        message="No usable WebDAV endpoint was found for this server URL.",
+        candidates=candidates,
+    )
+
+
+@router.get("/connectors/credentials", response_model=FileConnectorCredentialsResponse)
+def list_connector_credentials(
+    provider: str | None = None,
+    include_disabled: bool = False,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(
+        require_any_scope(
+            "files:file:admin", "system:settings:read", "admin:settings:read"
+        )
+    ),
+):
+    provider_norm = provider.strip().casefold() if provider else None
+    credentials = list_database_connector_credentials(
+        session,
+        tenant_id=principal.tenant_id,
+        include_disabled=include_disabled
+        and _can_read_disabled_connector_profiles(principal),
+    )
+    return FileConnectorCredentialsResponse(
+        credentials=[
+            FileConnectorCredentialResponse(**credential.to_response())
+            for credential in credentials
+            if provider_norm is None or credential.provider in {None, provider_norm}
+        ]
+    )
+
+
+@router.get(
+    "/connectors/policies/{scope_type}", response_model=FileConnectorPolicyResponse
+)
+def read_connector_policy(
+    scope_type: str,
+    scope_id: str | None = Query(default=None),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(
+        require_any_scope(
+            "files:file:admin", "system:settings:read", "admin:settings:read"
+        )
+    ),
+):
+    _require_connector_policy_read(principal, scope_type)
+    try:
+        return FileConnectorPolicyResponse(
+            **connector_policy_response(
+                session,
+                tenant_id=principal.tenant_id,
+                scope_type=scope_type,
+                scope_id=scope_id,
+            )
+        )
+    except (FileStorageError, ValueError, json.JSONDecodeError) as exc:
+        raise _http_error(exc, not_found=True) from exc
+
+
+@router.put(
+    "/connectors/policies/{scope_type}", response_model=FileConnectorPolicyResponse
+)
+def write_connector_policy(
+    scope_type: str,
+    payload: FileConnectorPolicyUpdateRequest,
+    scope_id: str | None = Query(default=None),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(
+        require_any_scope(
+            "files:file:admin", "system:settings:write", "admin:settings:write"
+        )
+    ),
+):
+    _require_connector_profile_write(principal, scope_type)
+    try:
+        set_connector_policy(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            scope_type=scope_type,
+            scope_id=scope_id,
+            policy=payload.policy,
+        )
+        _record_connector_settings_change(
+            session,
+            collection=FILES_CONNECTOR_POLICIES_COLLECTION,
+            resource_type=FILES_CONNECTOR_POLICY_RESOURCE,
+            resource_id=_file_connector_policy_resource_id(scope_type, scope_id),
+            operation="updated",
+            principal=principal,
+            tenant_id=None
+            if scope_type.strip().casefold() == "system"
+            else principal.tenant_id,
+            payload={"scope_type": scope_type.strip().casefold(), "scope_id": scope_id},
+        )
+        session.commit()
+        return FileConnectorPolicyResponse(
+            **connector_policy_response(
+                session,
+                tenant_id=principal.tenant_id,
+                scope_type=scope_type,
+                scope_id=scope_id,
+            )
+        )
+    except (FileStorageError, ValueError, json.JSONDecodeError) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+
+
+@router.post(
+    "/connectors/credentials",
+    response_model=FileConnectorCredentialResponse,
+    status_code=status.HTTP_201_CREATED,
+)
+def create_connector_credential(
+    payload: FileConnectorCredentialCreateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(
+        require_any_scope(
+            "files:file:admin", "system:settings:write", "admin:settings:write"
+        )
+    ),
+):
+    _require_connector_credential_write(principal, payload.scope_type)
+    credentials = payload.credentials
+    try:
+        _ensure_connector_credential_configuration_allowed(
+            session,
+            principal,
+            credential_id=payload.id,
+            provider=payload.provider,
+            scope_type=payload.scope_type,
+            scope_id=payload.scope_id,
+            operation="configure_credentials",
+        )
+        _ensure_connector_local_policy_allowed(
+            session,
+            principal,
+            scope_type=payload.scope_type,
+            scope_id=payload.scope_id,
+            policy=payload.policy,
+        )
+        row = create_connector_credential_row(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            credential_id=payload.id,
+            label=payload.label,
+            provider=payload.provider,
+            scope_type=payload.scope_type,
+            scope_id=payload.scope_id,
+            enabled=payload.enabled,
+            credential_mode=payload.credential_mode,
+            username=credentials.username,
+            password=credentials.password,
+            token=credentials.token,
+            password_env=credentials.password_env,
+            token_env=credentials.token_env,
+            secret_ref=credentials.secret_ref,
+            policy=payload.policy,
+            metadata=payload.metadata,
+        )
+        _record_connector_settings_change(
+            session,
+            collection=FILES_CONNECTOR_CREDENTIALS_COLLECTION,
+            resource_type=FILES_CONNECTOR_CREDENTIAL_RESOURCE,
+            resource_id=row.id,
+            operation="created",
+            principal=principal,
+            tenant_id=row.tenant_id,
+            payload={
+                "scope_type": row.scope_type,
+                "scope_id": row.scope_id,
+                "provider": row.provider,
+            },
+        )
+        session.commit()
+        session.refresh(row)
+        return _connector_credential_response(row)
+    except ConnectorPolicyDenied as exc:
+        session.rollback()
+        raise _connector_policy_error(exc) from exc
+    except (FileStorageError, ValueError, json.JSONDecodeError) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+
+
+@router.get(
+    "/connectors/credentials/{credential_id}",
+    response_model=FileConnectorCredentialResponse,
+)
+def get_connector_credential(
+    credential_id: str,
+    include_disabled: bool = False,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(
+        require_any_scope(
+            "files:file:admin", "system:settings:read", "admin:settings:read"
+        )
+    ),
+):
+    try:
+        row = get_connector_credential_row(
+            session,
+            tenant_id=principal.tenant_id,
+            credential_id=credential_id,
+            include_disabled=include_disabled
+            and _can_read_disabled_connector_profiles(principal),
+        )
+        return _connector_credential_response(row)
+    except FileStorageError as exc:
+        raise _http_error(exc, not_found=True) from exc
+
+
+@router.patch(
+    "/connectors/credentials/{credential_id}",
+    response_model=FileConnectorCredentialResponse,
+)
+def update_connector_credential(
+    credential_id: str,
+    payload: FileConnectorCredentialUpdateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(
+        require_any_scope(
+            "files:file:admin", "system:settings:write", "admin:settings:write"
+        )
+    ),
+):
+    try:
+        row = get_connector_credential_row(
+            session,
+            tenant_id=principal.tenant_id,
+            credential_id=credential_id,
+            include_disabled=True,
+        )
+    except FileStorageError as exc:
+        raise _http_error(exc, not_found=True) from exc
+    _require_connector_credential_write(principal, row.scope_type)
+    credentials = payload.credentials
+    try:
+        provider = payload.provider if payload.provider is not None else row.provider
+        _ensure_connector_credential_configuration_allowed(
+            session,
+            principal,
+            credential_id=row.id,
+            provider=provider,
+            scope_type=row.scope_type,
+            scope_id=row.scope_id,
+            operation="configure_credentials",
+        )
+        if payload.policy is not None:
+            _ensure_connector_local_policy_allowed(
+                session,
+                principal,
+                scope_type=row.scope_type,
+                scope_id=row.scope_id,
+                policy=payload.policy,
+            )
+        update_connector_credential_row(
+            session,
+            row,
+            user_id=principal.user.id,
+            label=payload.label,
+            provider=payload.provider,
+            enabled=payload.enabled,
+            credential_mode=payload.credential_mode,
+            username=credentials.username if credentials else None,
+            password=credentials.password if credentials else None,
+            token=credentials.token if credentials else None,
+            password_env=credentials.password_env if credentials else None,
+            token_env=credentials.token_env if credentials else None,
+            secret_ref=credentials.secret_ref if credentials else None,
+            clear_password=payload.clear_password,
+            clear_token=payload.clear_token,
+            policy=payload.policy,
+            metadata=payload.metadata,
+        )
+        _record_connector_settings_change(
+            session,
+            collection=FILES_CONNECTOR_CREDENTIALS_COLLECTION,
+            resource_type=FILES_CONNECTOR_CREDENTIAL_RESOURCE,
+            resource_id=row.id,
+            operation="updated",
+            principal=principal,
+            tenant_id=row.tenant_id,
+            payload={
+                "scope_type": row.scope_type,
+                "scope_id": row.scope_id,
+                "provider": row.provider,
+            },
+        )
+        session.commit()
+        session.refresh(row)
+        return _connector_credential_response(row)
+    except ConnectorPolicyDenied as exc:
+        session.rollback()
+        raise _connector_policy_error(exc) from exc
+    except (FileStorageError, ValueError, json.JSONDecodeError) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+
+
+@router.delete(
+    "/connectors/credentials/{credential_id}",
+    response_model=FileConnectorCredentialResponse,
+)
+def deactivate_connector_credential(
+    credential_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(
+        require_any_scope(
+            "files:file:admin", "system:settings:write", "admin:settings:write"
+        )
+    ),
+):
+    try:
+        row = get_connector_credential_row(
+            session,
+            tenant_id=principal.tenant_id,
+            credential_id=credential_id,
+            include_disabled=True,
+        )
+    except FileStorageError as exc:
+        raise _http_error(exc, not_found=True) from exc
+    _require_connector_credential_write(principal, row.scope_type)
+    try:
+        deletion = delete_connector_credential_row(
+            session,
+            row,
+            deletion_reason="api_delete",
+            user_id=principal.user.id,
+            api_key_id=principal.api_key.id if principal.api_key else None,
+        )
+        if deletion.changed:
+            _record_connector_settings_change(
+                session,
+                collection=FILES_CONNECTOR_CREDENTIALS_COLLECTION,
+                resource_type=FILES_CONNECTOR_CREDENTIAL_RESOURCE,
+                resource_id=row.id,
+                operation="deleted",
+                principal=principal,
+                tenant_id=row.tenant_id,
+                payload={
+                    "scope_type": row.scope_type,
+                    "scope_id": row.scope_id,
+                    "provider": row.provider,
+                },
+            )
+            for profile in deletion.affected_profiles:
+                _record_connector_settings_change(
+                    session,
+                    collection=FILES_CONNECTOR_PROFILES_COLLECTION,
+                    resource_type=FILES_CONNECTOR_PROFILE_RESOURCE,
+                    resource_id=profile.id,
+                    operation="updated",
+                    principal=principal,
+                    tenant_id=profile.tenant_id,
+                    payload={
+                        "scope_type": profile.scope_type,
+                        "scope_id": profile.scope_id,
+                        "provider": profile.provider,
+                        "reason": "credential_deleted",
+                    },
+                )
+        session.commit()
+        session.refresh(row)
+        return _connector_credential_response(row)
+    except FileStorageError as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+    except Exception:
+        session.rollback()
+        raise
+
+
+@router.get("/connectors/profiles", response_model=FileConnectorProfilesResponse)
+def list_connector_profiles(
+    provider: str | None = None,
+    campaign_id: str | None = None,
+    include_disabled: bool = False,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(
+        require_any_scope(
+            "files:file:read",
+            "files:file:upload",
+            "files:file:download",
+            "files:file:admin",
+            "system:settings:read",
+            "admin:settings:read",
+        )
+    ),
+):
+    try:
+        if campaign_id:
+            _ensure_campaign_file_access(session, principal, campaign_id)
+        profiles = _visible_connector_profiles(
+            session,
+            principal,
+            provider=provider,
+            campaign_id=campaign_id,
+            include_disabled=include_disabled
+            and _can_read_disabled_connector_profiles(principal),
+            include_admin_scopes=_can_read_disabled_connector_profiles(principal),
+            include_effective_policy=False,
+        )
+    except (OSError, ValueError, json.JSONDecodeError) as exc:
+        raise _http_error(exc) from exc
+    return FileConnectorProfilesResponse(
+        profiles=[
+            FileConnectorProfileResponse(**profile.to_response())
+            for profile in profiles
+        ]
+    )
+
+
+@router.post(
+    "/connectors/profiles",
+    response_model=FileConnectorProfileResponse,
+    status_code=status.HTTP_201_CREATED,
+)
+def create_connector_profile(
+    payload: FileConnectorProfileCreateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(
+        require_any_scope(
+            "files:file:admin", "system:settings:write", "admin:settings:write"
+        )
+    ),
+):
+    _require_connector_profile_write(principal, payload.scope_type)
+    credentials = payload.credentials
+    try:
+        credential_row = _credential_row_for_profile(
+            session,
+            principal,
+            credential_profile_id=payload.credential_profile_id,
+            provider=payload.provider,
+            profile_id=payload.id,
+            scope_type=payload.scope_type,
+            scope_id=payload.scope_id,
+        )
+        _ensure_connector_configuration_allowed(
+            session,
+            principal,
+            connector_id=payload.id,
+            credential_id=payload.credential_profile_id,
+            provider=payload.provider,
+            endpoint_url=connector_effective_endpoint_url(
+                provider=payload.provider,
+                endpoint_url=payload.endpoint_url,
+                metadata=payload.metadata,
+            ),
+            base_path=payload.base_path,
+            scope_type=payload.scope_type,
+            scope_id=payload.scope_id,
+            operation="configure",
+        )
+        _ensure_connector_local_policy_allowed(
+            session,
+            principal,
+            scope_type=payload.scope_type,
+            scope_id=payload.scope_id,
+            policy=payload.policy,
+        )
+        row = create_connector_profile_row(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            profile_id=payload.id,
+            label=payload.label,
+            provider=payload.provider,
+            scope_type=payload.scope_type,
+            scope_id=payload.scope_id,
+            endpoint_url=payload.endpoint_url,
+            base_path=payload.base_path,
+            enabled=payload.enabled,
+            credential_profile_id=payload.credential_profile_id,
+            credential_mode=payload.credential_mode,
+            username=credentials.username,
+            password=credentials.password,
+            token=credentials.token,
+            password_env=credentials.password_env,
+            token_env=credentials.token_env,
+            secret_ref=credentials.secret_ref,
+            capabilities=payload.capabilities,
+            policy=payload.policy,
+            metadata=payload.metadata,
+        )
+        _record_connector_settings_change(
+            session,
+            collection=FILES_CONNECTOR_PROFILES_COLLECTION,
+            resource_type=FILES_CONNECTOR_PROFILE_RESOURCE,
+            resource_id=row.id,
+            operation="created",
+            principal=principal,
+            tenant_id=row.tenant_id,
+            payload={
+                "scope_type": row.scope_type,
+                "scope_id": row.scope_id,
+                "provider": row.provider,
+            },
+        )
+        session.commit()
+        session.refresh(row)
+        return FileConnectorProfileResponse(
+            **connector_profile_from_row(
+                row, credential_row=credential_row
+            ).to_response()
+        )
+    except ConnectorPolicyDenied as exc:
+        session.rollback()
+        raise _connector_policy_error(exc) from exc
+    except (FileStorageError, ValueError, json.JSONDecodeError) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc

src/govoplan_files/backend/routes/folders.py

@@ -0,0 +1,151 @@
+from __future__ import annotations
+
+from typing import Literal
+from fastapi import APIRouter, Depends, Query
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal, require_scope
+from govoplan_files.backend.schemas import (
+    FileFolderCreateRequest,
+    FileFolderDeleteRequest,
+    FileFolderDeleteResponse,
+    FileFolderResponse,
+    FileFoldersResponse,
+)
+from govoplan_core.db.session import get_session
+from govoplan_files.backend.storage.paths import UnsafeFilePathError
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.folders import (
+    create_folder,
+    list_folders_for_user,
+    list_folders_for_user_window,
+    soft_delete_folder,
+)
+
+
+from govoplan_files.backend.route_support import (
+    _folder_response,
+    _http_error,
+    _is_admin,
+)
+from govoplan_files.backend.services.list_queries import (
+    FOLDERS_LIST_CURSOR_SCOPE,
+    _cursor_page_size,
+    _files_delta_watermark,
+    _folder_cursor_values,
+    _folders_list_fingerprint,
+    _next_folder_list_cursor,
+)
+
+router = APIRouter(prefix="/files", tags=["files"])
+
+
+@router.get("/folders", response_model=FileFoldersResponse)
+def list_file_folders(
+    owner_type: Literal["user", "group"],
+    owner_id: str,
+    page_size: int | None = Query(default=None, ge=1, le=1000),
+    cursor: str | None = None,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:read")),
+):
+    try:
+        watermark = _files_delta_watermark(session, principal.tenant_id)
+        effective_page_size = _cursor_page_size(
+            FOLDERS_LIST_CURSOR_SCOPE, cursor, page_size
+        )
+        if effective_page_size is None:
+            folders = list_folders_for_user(
+                session,
+                tenant_id=principal.tenant_id,
+                user_id=principal.user.id,
+                owner_type=owner_type,
+                owner_id=owner_id,
+                is_admin=_is_admin(principal),
+            )
+            return FileFoldersResponse(
+                folders=[_folder_response(folder) for folder in folders],
+                watermark=watermark,
+            )
+        fingerprint = _folders_list_fingerprint(
+            principal,
+            owner_type=owner_type,
+            owner_id=owner_id,
+            page_size=effective_page_size,
+        )
+        after_path, after_id = _folder_cursor_values(cursor, fingerprint=fingerprint)
+        folders, has_more = list_folders_for_user_window(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            owner_type=owner_type,
+            owner_id=owner_id,
+            is_admin=_is_admin(principal),
+            page_size=effective_page_size,
+            after_path=after_path,
+            after_id=after_id,
+        )
+        return FileFoldersResponse(
+            folders=[_folder_response(folder) for folder in folders],
+            cursor=cursor,
+            next_cursor=_next_folder_list_cursor(
+                principal,
+                folders,
+                owner_type=owner_type,
+                owner_id=owner_id,
+                page_size=effective_page_size,
+                has_more=has_more,
+            ),
+            watermark=watermark,
+        )
+    except FileStorageError as exc:
+        raise _http_error(exc) from exc
+
+
+@router.post("/folders", response_model=FileFolderResponse)
+def create_file_folder(
+    payload: FileFolderCreateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:organize")),
+):
+    try:
+        folder = create_folder(
+            session,
+            tenant_id=principal.tenant_id,
+            owner_type=payload.owner_type,
+            owner_id=payload.owner_id,
+            user_id=principal.user.id,
+            path=payload.path,
+            is_admin=_is_admin(principal),
+        )
+        session.commit()
+        return _folder_response(folder)
+    except (FileStorageError, UnsafeFilePathError, ValueError) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+
+
+@router.post("/folders/delete", response_model=FileFolderDeleteResponse)
+def delete_file_folder(
+    payload: FileFolderDeleteRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:delete")),
+):
+    try:
+        deleted_folders, deleted_files = soft_delete_folder(
+            session,
+            tenant_id=principal.tenant_id,
+            owner_type=payload.owner_type,
+            owner_id=payload.owner_id,
+            user_id=principal.user.id,
+            path=payload.path,
+            recursive=payload.recursive,
+            is_admin=_is_admin(principal),
+        )
+        session.commit()
+        return FileFolderDeleteResponse(
+            deleted_folders=deleted_folders, deleted_files=deleted_files
+        )
+    except (FileStorageError, UnsafeFilePathError, ValueError) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc

src/govoplan_files/backend/routes/form_evidence.py

@@ -0,0 +1,172 @@
+from __future__ import annotations
+
+from datetime import UTC, datetime
+import hashlib
+
+from fastapi import (
+    APIRouter,
+    Depends,
+    File as FastAPIFile,
+    Header,
+    HTTPException,
+    UploadFile,
+    status,
+)
+from sqlalchemy.orm import Session
+
+from govoplan_core.core.events import (
+    EventActorRef,
+    EventObjectRef,
+    EventTenantRef,
+    PlatformEvent,
+    emit_platform_event,
+)
+from govoplan_core.core.institutional import EvidenceReference
+from govoplan_core.db.session import get_session
+from govoplan_files.backend.db.models import FileFormEvidenceGrant
+from govoplan_files.backend.route_support import _read_limited_upload
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.files import create_file_asset
+
+
+router = APIRouter(prefix="/files", tags=["files"])
+
+
+@router.post(
+    "/form-evidence/upload",
+    response_model=dict[str, object],
+    status_code=status.HTTP_201_CREATED,
+)
+def upload_form_evidence(
+    file: UploadFile = FastAPIFile(...),
+    x_form_evidence_token: str = Header(alias="X-Form-Evidence-Token"),
+    session: Session = Depends(get_session),
+) -> dict[str, object]:
+    now = datetime.now(UTC)
+    try:
+        grant = (
+            session.query(FileFormEvidenceGrant)
+            .filter(
+                FileFormEvidenceGrant.token_sha256
+                == _token_sha256(x_form_evidence_token)
+            )
+            .with_for_update()
+            .one_or_none()
+        )
+        if grant is None or grant.status != "issued" or _aware(grant.expires_at) <= now:
+            raise _upload_unavailable()
+        content_type = (
+            str(file.content_type or "application/octet-stream")
+            .split(";", 1)[0]
+            .strip()
+            .casefold()
+        )
+        if grant.allowed_content_types and content_type not in set(
+            grant.allowed_content_types
+        ):
+            raise HTTPException(
+                status_code=status.HTTP_415_UNSUPPORTED_MEDIA_TYPE,
+                detail="This Form does not accept the uploaded document type.",
+            )
+        data = _read_limited_upload(file, max_bytes=grant.max_size_bytes)
+        stored = create_file_asset(
+            session,
+            tenant_id=grant.tenant_id,
+            owner_type="user",
+            owner_id=grant.custodian_user_id,
+            user_id=grant.custodian_user_id,
+            filename=file.filename or "form-attachment",
+            data=data,
+            folder=f"Form submissions/{grant.form_instance_id}",
+            content_type=content_type,
+            description="Managed attachment captured through Forms Runtime.",
+            metadata={
+                "form_evidence": {
+                    "grant_id": grant.id,
+                    "form_instance_id": grant.form_instance_id,
+                    "form_definition_id": grant.form_definition_id,
+                    "form_definition_revision": grant.form_definition_revision,
+                    "purpose": grant.purpose,
+                },
+                "source_provenance": {
+                    "source_type": "form_evidence",
+                    "connector_id": "forms_runtime.evidence.files",
+                    "provider": "forms_runtime",
+                    "external_id": grant.id,
+                    "revision": grant.form_definition_revision,
+                },
+            },
+            conflict_strategy="rename",
+            is_admin=True,
+        )
+        grant.status = "uploaded"
+        grant.file_asset_id = stored.asset.id
+        grant.file_version_id = stored.version.id
+        grant.uploaded_at = now
+        session.add(grant)
+        evidence = EvidenceReference(
+            kind="document",
+            owner_module="files",
+            evidence_id=stored.asset.id,
+            tenant_id=grant.tenant_id,
+            version=stored.version.id,
+            checksum=stored.version.checksum_sha256,
+            source_ref=(f"form_submission:{grant.form_instance_id}:grant:{grant.id}"),
+            responsible_actor_ref=f"user:{grant.custodian_user_id}",
+            captured_at=now,
+        )
+        emit_platform_event(
+            session,
+            PlatformEvent(
+                type="files.form_evidence.uploaded",
+                module_id="files",
+                payload={
+                    "grant_id": grant.id,
+                    "form_instance_id": grant.form_instance_id,
+                    "file_asset_id": stored.asset.id,
+                    "file_version_id": stored.version.id,
+                    "checksum_sha256": stored.version.checksum_sha256,
+                    "size_bytes": stored.version.size_bytes,
+                },
+                occurred_at=now,
+                actor=EventActorRef(type="user", id=grant.custodian_user_id),
+                tenant=EventTenantRef(id=grant.tenant_id),
+                resource=EventObjectRef(type="file", id=stored.asset.id),
+                classification="confidential",
+            ),
+        )
+        session.commit()
+    except HTTPException:
+        session.rollback()
+        raise
+    except (FileStorageError, ValueError) as exc:
+        session.rollback()
+        raise HTTPException(
+            status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
+            detail=str(exc),
+        ) from exc
+    return {
+        "grant_id": grant.id,
+        "evidence": evidence.to_dict(include_inspection=True),
+    }
+
+
+def _token_sha256(token: str) -> str:
+    clean = str(token or "").strip()
+    if len(clean) < 32:
+        raise _upload_unavailable()
+    return hashlib.sha256(clean.encode("utf-8")).hexdigest()
+
+
+def _upload_unavailable() -> HTTPException:
+    return HTTPException(
+        status_code=status.HTTP_404_NOT_FOUND,
+        detail="The Form evidence upload is unavailable.",
+    )
+
+
+def _aware(value: datetime) -> datetime:
+    return value if value.tzinfo is not None else value.replace(tzinfo=UTC)
+
+
+__all__ = ["router", "upload_form_evidence"]

src/govoplan_files/backend/routes/integrity.py

@@ -0,0 +1,387 @@
+from __future__ import annotations
+
+import hashlib
+
+from fastapi import APIRouter, Depends, HTTPException, Query, status
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal, require_scope
+from govoplan_core.audit.logging import audit_from_principal
+from govoplan_core.db.session import get_session
+from govoplan_files.backend.db.models import (
+    FileIntegrityFinding,
+    FileIntegrityScan,
+)
+from govoplan_files.backend.schemas import (
+    FileIntegrityActionRequest,
+    FileIntegrityActionResponse,
+    FileIntegrityFindingResponse,
+    FileIntegrityFindingsResponse,
+    FileIntegrityScanCreateRequest,
+    FileIntegrityScanRunRequest,
+    FileIntegrityScanResponse,
+    FileIntegrityScansResponse,
+)
+from govoplan_files.backend.storage.backends import StorageBackendError
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.integrity import (
+    cleanup_orphan_finding,
+    create_integrity_scan,
+    mark_integrity_scan_failed,
+    recheck_integrity_finding,
+    run_integrity_scan_batch,
+)
+
+
+router = APIRouter(prefix="/files/integrity", tags=["files-integrity"])
+
+
+@router.get("/scans", response_model=FileIntegrityScansResponse)
+def list_integrity_scans(
+    limit: int = Query(default=50, ge=1, le=200),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:admin")),
+) -> FileIntegrityScansResponse:
+    rows = (
+        session.query(FileIntegrityScan)
+        .filter(FileIntegrityScan.tenant_id == principal.tenant_id)
+        .order_by(FileIntegrityScan.created_at.desc(), FileIntegrityScan.id.desc())
+        .limit(limit)
+        .all()
+    )
+    return FileIntegrityScansResponse(
+        scans=[_scan_response(row) for row in rows]
+    )
+
+
+@router.post(
+    "/scans",
+    response_model=FileIntegrityScanResponse,
+    status_code=status.HTTP_201_CREATED,
+)
+def create_scan(
+    payload: FileIntegrityScanCreateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:admin")),
+) -> FileIntegrityScanResponse:
+    try:
+        scan = create_integrity_scan(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            verify_checksums=payload.verify_checksums,
+            batch_size=payload.batch_size,
+        )
+        audit_from_principal(
+            session,
+            principal,
+            action="files.integrity.scan_created",
+            object_type="file_integrity_scan",
+            object_id=scan.id,
+            details={
+                "storage_backend": scan.storage_backend,
+                "verify_checksums": scan.verify_checksums,
+                "batch_size": scan.batch_size,
+            },
+        )
+        session.commit()
+        return _scan_response(scan)
+    except (FileStorageError, StorageBackendError) as exc:
+        session.rollback()
+        raise _integrity_http_error(exc) from exc
+
+
+@router.post("/scans/{scan_id}/run", response_model=FileIntegrityScanResponse)
+def run_scan_batch(
+    scan_id: str,
+    payload: FileIntegrityScanRunRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:admin")),
+) -> FileIntegrityScanResponse:
+    scan = _scan_for_tenant(
+        session,
+        scan_id,
+        principal.tenant_id,
+        for_update=True,
+    )
+    _assert_expected_revision(scan.revision, payload.expected_revision)
+    previous_status = scan.status
+    try:
+        run_integrity_scan_batch(session, scan)
+        if scan.status == "completed" and previous_status != "completed":
+            audit_from_principal(
+                session,
+                principal,
+                action="files.integrity.scan_completed",
+                object_type="file_integrity_scan",
+                object_id=scan.id,
+                details={
+                    "verified_blob_count": scan.verified_blob_count,
+                    "quarantined_blob_count": scan.quarantined_blob_count,
+                    "orphan_object_count": scan.orphan_object_count,
+                },
+            )
+        session.commit()
+        return _scan_response(scan)
+    except (FileStorageError, StorageBackendError) as exc:
+        session.rollback()
+        scan = _scan_for_tenant(
+            session,
+            scan_id,
+            principal.tenant_id,
+            for_update=True,
+        )
+        mark_integrity_scan_failed(scan, error=exc)
+        audit_from_principal(
+            session,
+            principal,
+            action="files.integrity.scan_failed",
+            object_type="file_integrity_scan",
+            object_id=scan.id,
+            details={"error_type": type(exc).__name__},
+        )
+        session.commit()
+        raise _integrity_http_error(exc) from exc
+
+
+@router.get(
+    "/scans/{scan_id}/findings",
+    response_model=FileIntegrityFindingsResponse,
+)
+def list_integrity_findings(
+    scan_id: str,
+    state_filter: str | None = Query(default=None, alias="state"),
+    limit: int = Query(default=500, ge=1, le=1000),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:admin")),
+) -> FileIntegrityFindingsResponse:
+    scan = _scan_for_tenant(session, scan_id, principal.tenant_id)
+    query = session.query(FileIntegrityFinding).filter(
+        FileIntegrityFinding.scan_id == scan.id,
+        FileIntegrityFinding.tenant_id == principal.tenant_id,
+    )
+    if state_filter:
+        query = query.filter(FileIntegrityFinding.state == state_filter)
+    rows = (
+        query.order_by(
+            FileIntegrityFinding.created_at.asc(),
+            FileIntegrityFinding.id.asc(),
+        )
+        .limit(limit)
+        .all()
+    )
+    return FileIntegrityFindingsResponse(
+        findings=[_finding_response(row) for row in rows]
+    )
+
+
+@router.post(
+    "/findings/{finding_id}/recheck",
+    response_model=FileIntegrityActionResponse,
+)
+def recheck_finding(
+    finding_id: str,
+    payload: FileIntegrityActionRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:admin")),
+) -> FileIntegrityActionResponse:
+    finding = _finding_for_tenant(
+        session,
+        finding_id,
+        principal.tenant_id,
+        for_update=True,
+    )
+    _assert_expected_revision(finding.revision, payload.expected_revision)
+    try:
+        result = recheck_integrity_finding(
+            session,
+            finding,
+            user_id=principal.user.id,
+            dry_run=payload.dry_run,
+        )
+        _audit_integrity_action(session, principal, result)
+        session.commit()
+        return _action_response(result)
+    except (FileStorageError, StorageBackendError) as exc:
+        session.rollback()
+        raise _integrity_http_error(exc) from exc
+
+
+@router.post(
+    "/findings/{finding_id}/cleanup",
+    response_model=FileIntegrityActionResponse,
+)
+def cleanup_finding(
+    finding_id: str,
+    payload: FileIntegrityActionRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:admin")),
+) -> FileIntegrityActionResponse:
+    finding = _finding_for_tenant(
+        session,
+        finding_id,
+        principal.tenant_id,
+        for_update=True,
+    )
+    _assert_expected_revision(finding.revision, payload.expected_revision)
+    try:
+        result = cleanup_orphan_finding(
+            session,
+            finding,
+            user_id=principal.user.id,
+            dry_run=payload.dry_run,
+        )
+        _audit_integrity_action(session, principal, result)
+        session.commit()
+        return _action_response(result)
+    except (FileStorageError, StorageBackendError) as exc:
+        session.rollback()
+        raise _integrity_http_error(exc) from exc
+
+
+def _scan_for_tenant(
+    session: Session,
+    scan_id: str,
+    tenant_id: str,
+    *,
+    for_update: bool = False,
+) -> FileIntegrityScan:
+    query = session.query(FileIntegrityScan).filter(FileIntegrityScan.id == scan_id)
+    if for_update:
+        query = query.populate_existing().with_for_update()
+    scan = query.one_or_none()
+    if scan is None or scan.tenant_id != tenant_id:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Integrity scan not found",
+        )
+    return scan
+
+
+def _finding_for_tenant(
+    session: Session,
+    finding_id: str,
+    tenant_id: str,
+    *,
+    for_update: bool = False,
+) -> FileIntegrityFinding:
+    query = session.query(FileIntegrityFinding).filter(
+        FileIntegrityFinding.id == finding_id
+    )
+    if for_update:
+        query = query.populate_existing().with_for_update()
+    finding = query.one_or_none()
+    if finding is None or finding.tenant_id != tenant_id:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Integrity finding not found",
+        )
+    return finding
+
+
+def _assert_expected_revision(current: int, expected: int) -> None:
+    if current != expected:
+        raise HTTPException(
+            status_code=status.HTTP_409_CONFLICT,
+            detail=(
+                "The integrity record changed after it was loaded; reload before "
+                "performing this action."
+            ),
+        )
+
+
+def _audit_integrity_action(session, principal, result) -> None:
+    audit_from_principal(
+        session,
+        principal,
+        action=f"files.integrity.{result.action}",
+        object_type="file_integrity_finding",
+        object_id=result.finding.id,
+        details={
+            "scan_id": result.finding.scan_id,
+            "kind": result.finding.kind,
+            "dry_run": result.dry_run,
+            "changed": result.changed,
+            "storage_key_sha256": hashlib.sha256(
+                result.finding.storage_key.encode("utf-8")
+            ).hexdigest(),
+            "inspection": result.inspection.kind
+            if result.inspection
+            else None,
+        },
+    )
+
+
+def _scan_response(scan: FileIntegrityScan) -> FileIntegrityScanResponse:
+    return FileIntegrityScanResponse(
+        id=scan.id,
+        tenant_id=scan.tenant_id,
+        storage_backend=scan.storage_backend,
+        storage_prefix=scan.storage_prefix,
+        status=scan.status,
+        revision=scan.revision,
+        phase=scan.phase,
+        verify_checksums=scan.verify_checksums,
+        batch_size=scan.batch_size,
+        scanned_blob_count=scan.scanned_blob_count,
+        verified_blob_count=scan.verified_blob_count,
+        quarantined_blob_count=scan.quarantined_blob_count,
+        scanned_object_count=scan.scanned_object_count,
+        orphan_object_count=scan.orphan_object_count,
+        created_by_user_id=scan.created_by_user_id,
+        started_at=scan.started_at.isoformat() if scan.started_at else None,
+        completed_at=scan.completed_at.isoformat()
+        if scan.completed_at
+        else None,
+        last_error=scan.last_error,
+        created_at=scan.created_at.isoformat(),
+        updated_at=scan.updated_at.isoformat(),
+    )
+
+
+def _finding_response(
+    finding: FileIntegrityFinding,
+) -> FileIntegrityFindingResponse:
+    return FileIntegrityFindingResponse(
+        id=finding.id,
+        scan_id=finding.scan_id,
+        tenant_id=finding.tenant_id,
+        kind=finding.kind,
+        state=finding.state,
+        revision=finding.revision,
+        blob_id=finding.blob_id,
+        storage_key=finding.storage_key,
+        expected_size_bytes=finding.expected_size_bytes,
+        observed_size_bytes=finding.observed_size_bytes,
+        expected_checksum_sha256=finding.expected_checksum_sha256,
+        observed_checksum_sha256=finding.observed_checksum_sha256,
+        resolved_at=finding.resolved_at.isoformat()
+        if finding.resolved_at
+        else None,
+        resolved_by_user_id=finding.resolved_by_user_id,
+        created_at=finding.created_at.isoformat(),
+        updated_at=finding.updated_at.isoformat(),
+    )
+
+
+def _action_response(result) -> FileIntegrityActionResponse:
+    return FileIntegrityActionResponse(
+        action=result.action,
+        changed=result.changed,
+        dry_run=result.dry_run,
+        finding=_finding_response(result.finding),
+        inspection_kind=result.inspection.kind if result.inspection else None,
+        inspection_valid=result.inspection.valid if result.inspection else None,
+    )
+
+
+def _integrity_http_error(exc: Exception) -> HTTPException:
+    if isinstance(exc, FileStorageError):
+        return HTTPException(
+            status_code=status.HTTP_409_CONFLICT,
+            detail=str(exc),
+        )
+    return HTTPException(
+        status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
+        detail="The configured file storage backend could not complete the integrity operation",
+    )

src/govoplan_files/backend/routes/lifecycle.py

@@ -0,0 +1,297 @@
+from __future__ import annotations
+
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal, require_scope
+from govoplan_core.audit.logging import audit_from_principal
+from govoplan_core.db.session import get_session
+from govoplan_files.backend.route_support import (
+    _asset_response,
+    _connector_space_response,
+    _http_error,
+    _is_admin,
+)
+from govoplan_files.backend.schemas import (
+    FileAssetResponse,
+    FileBlobGcRequest,
+    FileBlobGcResponse,
+    FileConnectorSpaceResponse,
+    FileFolderDeleteRequest,
+    FileFolderRestoreResponse,
+    FileLifecycleUpdateRequest,
+    FilePurgeExecuteRequest,
+    FilePurgePreviewItem,
+    FilePurgePreviewRequest,
+    FilePurgePreviewResponse,
+    FilePurgeResponse,
+    FileRestoreResponse,
+)
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.lifecycle import (
+    execute_asset_purge,
+    garbage_collect_unreferenced_blobs,
+    get_asset_for_lifecycle,
+    preview_asset_purge,
+    restore_asset,
+    restore_connector_space,
+    restore_folder,
+    set_asset_lifecycle,
+)
+
+
+router = APIRouter(prefix="/files", tags=["files-lifecycle"])
+
+
+@router.patch("/{file_id}/lifecycle", response_model=FileAssetResponse)
+def update_file_lifecycle(
+    file_id: str,
+    payload: FileLifecycleUpdateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:retention")),
+):
+    try:
+        asset = get_asset_for_lifecycle(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            asset_id=file_id,
+            is_admin=_is_admin(principal),
+        )
+        set_asset_lifecycle(
+            session,
+            asset,
+            retained_until=payload.retained_until,
+            legal_hold=payload.legal_hold,
+            reason=payload.reason,
+            expected_revision=payload.expected_revision,
+        )
+        audit_from_principal(
+            session,
+            principal,
+            action="files.lifecycle.updated",
+            object_type="file",
+            object_id=asset.id,
+            details={
+                "retained_until": (
+                    asset.retained_until.isoformat() if asset.retained_until else None
+                ),
+                "legal_hold": asset.legal_hold,
+                "lifecycle_revision": asset.lifecycle_revision,
+                "reason": asset.lifecycle_reason,
+            },
+        )
+        session.commit()
+        return _asset_response(session, asset, include_shares=True)
+    except FileStorageError as exc:
+        session.rollback()
+        raise _http_error(exc, not_found=True) from exc
+
+
+@router.post("/assets/{file_id}/restore", response_model=FileRestoreResponse)
+def restore_file(
+    file_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:restore")),
+):
+    try:
+        asset = get_asset_for_lifecycle(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            asset_id=file_id,
+            is_admin=_is_admin(principal),
+        )
+        changed = restore_asset(session, asset)
+        if changed:
+            audit_from_principal(
+                session,
+                principal,
+                action="files.file.restored",
+                object_type="file",
+                object_id=asset.id,
+                details={"display_path": asset.display_path},
+            )
+        session.commit()
+        return FileRestoreResponse(restored_count=1 if changed else 0)
+    except FileStorageError as exc:
+        session.rollback()
+        raise _http_error(exc, not_found=True) from exc
+
+
+@router.post("/folders/restore", response_model=FileFolderRestoreResponse)
+def restore_file_folder(
+    payload: FileFolderDeleteRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:restore")),
+):
+    try:
+        restored_folders, restored_files = restore_folder(
+            session,
+            tenant_id=principal.tenant_id,
+            owner_type=payload.owner_type,
+            owner_id=payload.owner_id,
+            user_id=principal.user.id,
+            path=payload.path,
+            recursive=payload.recursive,
+            is_admin=_is_admin(principal),
+        )
+        audit_from_principal(
+            session,
+            principal,
+            action="files.folder.restored",
+            object_type="file_folder",
+            object_id=payload.path,
+            details={
+                "restored_folders": restored_folders,
+                "restored_files": restored_files,
+            },
+        )
+        session.commit()
+        return FileFolderRestoreResponse(
+            restored_folders=restored_folders, restored_files=restored_files
+        )
+    except FileStorageError as exc:
+        session.rollback()
+        raise _http_error(exc, not_found=True) from exc
+
+
+@router.post(
+    "/connector-spaces/{space_id}/restore",
+    response_model=FileConnectorSpaceResponse,
+)
+def restore_file_connector_space(
+    space_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:restore")),
+):
+    try:
+        space = restore_connector_space(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            space_id=space_id,
+            is_admin=_is_admin(principal),
+        )
+        audit_from_principal(
+            session,
+            principal,
+            action="files.connector_space.restored",
+            object_type="file_connector_space",
+            object_id=space.id,
+            details={"label": space.label},
+        )
+        session.commit()
+        return _connector_space_response(space)
+    except FileStorageError as exc:
+        session.rollback()
+        raise _http_error(exc, not_found=True) from exc
+
+
+@router.post("/purge/preview", response_model=FilePurgePreviewResponse)
+def preview_file_purge(
+    payload: FilePurgePreviewRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:purge")),
+):
+    try:
+        preview = preview_asset_purge(
+            session, tenant_id=principal.tenant_id, file_ids=payload.file_ids
+        )
+        return FilePurgePreviewResponse(
+            preview_sha256=preview.preview_sha256,
+            eligible=preview.eligible,
+            items=[
+                FilePurgePreviewItem(
+                    file_id=item.file_id,
+                    filename=item.filename,
+                    lifecycle_revision=item.lifecycle_revision,
+                    deleted_at=(item.deleted_at.isoformat() if item.deleted_at else None),
+                    retained_until=(
+                        item.retained_until.isoformat() if item.retained_until else None
+                    ),
+                    legal_hold=item.legal_hold,
+                    blockers=list(item.blockers),
+                    blob_ids=list(item.blob_ids),
+                )
+                for item in preview.items
+            ],
+        )
+    except FileStorageError as exc:
+        raise _http_error(exc) from exc
+
+
+@router.post("/purge/execute", response_model=FilePurgeResponse)
+def execute_file_purge(
+    payload: FilePurgeExecuteRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:purge")),
+):
+    try:
+        result = execute_asset_purge(
+            session,
+            tenant_id=principal.tenant_id,
+            file_ids=payload.file_ids,
+            preview_sha256=payload.preview_sha256,
+            idempotency_key=payload.idempotency_key,
+            approval_reference=payload.approval_reference,
+            before_commit=lambda assets: audit_from_principal(
+                session,
+                principal,
+                action="files.files.purged",
+                object_type="file_batch",
+                object_id=payload.preview_sha256,
+                details={
+                    "file_ids": [asset.id for asset in assets],
+                    "approval_reference": payload.approval_reference,
+                    "preview_sha256": payload.preview_sha256,
+                },
+            ),
+        )
+        return FilePurgeResponse(
+            recovery_operation_id=result.recovery_operation_id,
+            status=result.status,
+            replayed=result.replayed,
+            purged_files=result.purged_files,
+            released_blobs=result.released_blobs,
+        )
+    except FileStorageError as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+
+
+@router.post("/purge/blobs", response_model=FileBlobGcResponse)
+def garbage_collect_file_blobs(
+    payload: FileBlobGcRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:purge")),
+):
+    try:
+        result = garbage_collect_unreferenced_blobs(
+            session,
+            tenant_id=principal.tenant_id,
+            limit=payload.limit,
+            approval_reference=payload.approval_reference,
+        )
+        audit_from_principal(
+            session,
+            principal,
+            action="files.blobs.garbage_collected",
+            object_type="file_blob_batch",
+            object_id=principal.tenant_id,
+            details={
+                "inspected_blobs": result.inspected_blobs,
+                "deleted_blobs": result.deleted_blobs,
+                "unresolved_operation_ids": list(result.unresolved_operation_ids),
+                "approval_reference": payload.approval_reference,
+            },
+            commit=True,
+        )
+        return FileBlobGcResponse(
+            inspected_blobs=result.inspected_blobs,
+            deleted_blobs=result.deleted_blobs,
+            unresolved_operation_ids=list(result.unresolved_operation_ids),
+        )
+    except FileStorageError as exc:
+        session.rollback()
+        raise _http_error(exc) from exc

src/govoplan_files/backend/routes/listing.py

@@ -0,0 +1,194 @@
+from __future__ import annotations
+
+from typing import Literal
+from fastapi import APIRouter, Depends, HTTPException, Query, status
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal, require_scope
+from govoplan_files.backend.schemas import (
+    FileDeltaResponse,
+    FileListResponse,
+)
+from govoplan_core.db.session import get_session
+from govoplan_files.backend.storage.files import (
+    count_assets_for_user,
+    list_assets_for_user,
+    list_assets_for_user_window,
+    list_recent_assets_for_user,
+)
+
+
+from govoplan_files.backend.route_support import (
+    _asset_list_response,
+    _ensure_campaign_file_access,
+    _ensure_list_owner_access,
+    _is_admin,
+)
+from govoplan_files.backend.services.list_queries import (
+    FILES_LIST_CURSOR_SCOPE,
+    _cursor_page_size,
+    _file_cursor_values,
+    _files_delta_response,
+    _files_delta_watermark,
+    _files_list_fingerprint,
+    _full_file_delta_response,
+    _next_file_list_cursor,
+)
+
+router = APIRouter(prefix="/files", tags=["files"])
+
+
+@router.get("/delta", response_model=FileDeltaResponse)
+def files_delta(
+    owner_type: Literal["user", "group"] | None = None,
+    owner_id: str | None = None,
+    campaign_id: str | None = None,
+    path_prefix: str | None = None,
+    since: str | None = None,
+    limit: int = Query(default=500, ge=1, le=1000),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:read")),
+):
+    _ensure_list_owner_access(session, principal, owner_type, owner_id)
+    _ensure_campaign_file_access(session, principal, campaign_id)
+    if since is None:
+        return _full_file_delta_response(
+            session,
+            principal=principal,
+            owner_type=owner_type,
+            owner_id=owner_id,
+            campaign_id=campaign_id,
+            path_prefix=path_prefix,
+        )
+    return _files_delta_response(
+        session,
+        principal=principal,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        campaign_id=campaign_id,
+        path_prefix=path_prefix,
+        since=since,
+        limit=limit,
+    )
+
+
+@router.get("", response_model=FileListResponse)
+def list_files(
+    owner_type: Literal["user", "group"] | None = None,
+    owner_id: str | None = None,
+    campaign_id: str | None = None,
+    path_prefix: str | None = None,
+    campaign_usage: Literal["linked", "unlinked"] | None = None,
+    audit_relevant: bool | None = None,
+    sort: Literal["path", "recent"] = "path",
+    page_size: int | None = Query(default=None, ge=1, le=1000),
+    cursor: str | None = None,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:read")),
+):
+    _ensure_list_owner_access(session, principal, owner_type, owner_id)
+    _ensure_campaign_file_access(session, principal, campaign_id)
+    watermark = _files_delta_watermark(session, principal.tenant_id)
+    total = count_assets_for_user(
+        session,
+        tenant_id=principal.tenant_id,
+        user_id=principal.user.id,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        campaign_id=campaign_id,
+        path_prefix=path_prefix,
+        campaign_usage=campaign_usage,
+        audit_relevant=audit_relevant,
+        is_admin=_is_admin(principal),
+    )
+    if sort == "recent":
+        if cursor:
+            raise HTTPException(
+                status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
+                detail="Recent file projections do not accept a path-order cursor.",
+            )
+        recent_limit = page_size or 25
+        assets = list_recent_assets_for_user(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            limit=recent_limit,
+            owner_type=owner_type,
+            owner_id=owner_id,
+            campaign_id=campaign_id,
+            path_prefix=path_prefix,
+            campaign_usage=campaign_usage,
+            audit_relevant=audit_relevant,
+            is_admin=_is_admin(principal),
+        )
+        return FileListResponse(
+            files=_asset_list_response(session, assets, include_shares=True),
+            total=total,
+            watermark=watermark,
+        )
+    effective_page_size = _cursor_page_size(FILES_LIST_CURSOR_SCOPE, cursor, page_size)
+    if effective_page_size is not None:
+        fingerprint = _files_list_fingerprint(
+            principal,
+            owner_type=owner_type,
+            owner_id=owner_id,
+            campaign_id=campaign_id,
+            path_prefix=path_prefix,
+            campaign_usage=campaign_usage,
+            audit_relevant=audit_relevant,
+            page_size=effective_page_size,
+        )
+        after_display_path, after_updated_at, after_id = _file_cursor_values(
+            cursor, fingerprint=fingerprint
+        )
+        assets, has_more = list_assets_for_user_window(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            owner_type=owner_type,
+            owner_id=owner_id,
+            campaign_id=campaign_id,
+            path_prefix=path_prefix,
+            campaign_usage=campaign_usage,
+            audit_relevant=audit_relevant,
+            is_admin=_is_admin(principal),
+            page_size=effective_page_size,
+            after_display_path=after_display_path,
+            after_updated_at=after_updated_at,
+            after_id=after_id,
+        )
+        return FileListResponse(
+            files=_asset_list_response(session, assets, include_shares=True),
+            total=total,
+            cursor=cursor,
+            next_cursor=_next_file_list_cursor(
+                principal,
+                assets,
+                owner_type=owner_type,
+                owner_id=owner_id,
+                campaign_id=campaign_id,
+                path_prefix=path_prefix,
+                campaign_usage=campaign_usage,
+                audit_relevant=audit_relevant,
+                page_size=effective_page_size,
+                has_more=has_more,
+            ),
+            watermark=watermark,
+        )
+    assets = list_assets_for_user(
+        session,
+        tenant_id=principal.tenant_id,
+        user_id=principal.user.id,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        campaign_id=campaign_id,
+        path_prefix=path_prefix,
+        campaign_usage=campaign_usage,
+        audit_relevant=audit_relevant,
+        is_admin=_is_admin(principal),
+    )
+    return FileListResponse(
+        files=_asset_list_response(session, assets, include_shares=True),
+        total=total,
+        watermark=watermark,
+    )

src/govoplan_files/backend/routes/shares.py

@@ -0,0 +1,330 @@
+from __future__ import annotations
+
+from datetime import datetime, timezone
+
+from fastapi import APIRouter, Depends, HTTPException, Query, status
+from sqlalchemy.orm import Session
+
+from govoplan_core.api.v1.schemas import (
+    ReferenceOptionListResponse,
+    ReferenceOptionResponse,
+)
+from govoplan_core.auth import ApiPrincipal, require_scope
+from govoplan_core.audit.logging import audit_from_principal
+from govoplan_core.core.references import (
+    access_scope_reference_page,
+    access_scope_reference_provider_available,
+)
+from govoplan_core.db.session import get_session
+from govoplan_files.backend.runtime import get_registry
+from govoplan_files.backend.schemas import (
+    BulkFileShareRequest,
+    BulkFileShareResponse,
+    FileShareRequest,
+    FileShareResponse,
+    FileSharesResponse,
+)
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.files import (
+    current_file_share_for_target,
+    get_asset_for_share_management,
+    list_file_shares,
+    revoke_file_share,
+    share_file,
+    share_files,
+)
+from govoplan_files.backend.route_support import (
+    _file_share_response,
+    _http_error,
+    _is_admin,
+)
+
+router = APIRouter(prefix="/files", tags=["files"])
+
+
+@router.get(
+    "/{file_id}/share-target-options",
+    response_model=ReferenceOptionListResponse,
+)
+def search_share_targets(
+    file_id: str,
+    target_type: str,
+    q: str = "",
+    selected: list[str] = Query(default=[]),
+    limit: int = Query(default=50, ge=1, le=200),
+    cursor: str | None = None,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:share")),
+) -> ReferenceOptionListResponse:
+    if target_type not in {"user", "group"}:
+        raise HTTPException(
+            status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
+            detail="Share target type must be user or group",
+        )
+    try:
+        get_asset_for_share_management(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            asset_id=file_id,
+            is_admin=_is_admin(principal),
+        )
+        registry = get_registry()
+        page = access_scope_reference_page(
+            registry,
+            principal,
+            scope_type=target_type,
+            reference_kind="membership" if target_type == "user" else "group",
+            query=q,
+            selected_values=selected,
+            limit=limit,
+            cursor=cursor,
+            administrative=True,
+            session=session,
+        )
+    except ValueError as exc:
+        raise HTTPException(
+            status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
+            detail=str(exc),
+        ) from exc
+    except FileStorageError as exc:
+        raise _http_error(exc) from exc
+    return ReferenceOptionListResponse(
+        options=[
+            ReferenceOptionResponse(**option.to_dict()) for option in page.options
+        ],
+        provider_available=access_scope_reference_provider_available(registry),
+        next_cursor=page.next_cursor,
+        has_more=page.has_more,
+    )
+
+
+@router.get("/{file_id}/shares", response_model=FileSharesResponse)
+def list_shares(
+    file_id: str,
+    include_inactive: bool = False,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:share")),
+):
+    try:
+        asset = get_asset_for_share_management(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            asset_id=file_id,
+            is_admin=_is_admin(principal),
+        )
+        return FileSharesResponse(
+            shares=[
+                _file_share_response(share)
+                for share in list_file_shares(
+                    session,
+                    tenant_id=principal.tenant_id,
+                    asset_id=asset.id,
+                    include_inactive=include_inactive,
+                )
+            ]
+        )
+    except FileStorageError as exc:
+        raise _http_error(exc) from exc
+
+
+@router.post("/{file_id}/shares", response_model=FileShareResponse)
+def create_share(
+    file_id: str,
+    payload: FileShareRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:share")),
+):
+    try:
+        asset = get_asset_for_share_management(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            asset_id=file_id,
+            is_admin=_is_admin(principal),
+        )
+        previous = current_file_share_for_target(
+            session,
+            tenant_id=principal.tenant_id,
+            asset_id=asset.id,
+            target_type=payload.target_type,
+            target_id=payload.target_id,
+        )
+        previous_permission = previous.permission if previous else None
+        previous_expiry = previous.expires_at if previous else None
+        share = share_file(
+            session,
+            tenant_id=principal.tenant_id,
+            asset=asset,
+            target_type=payload.target_type,
+            target_id=payload.target_id,
+            permission=payload.permission,
+            user_id=principal.user.id,
+            expires_at=payload.expires_at,
+        )
+        session.flush()
+        action = _share_audit_action(
+            existed=previous is not None,
+            previous_permission=previous_permission,
+            permission=share.permission,
+            previous_expiry=previous_expiry,
+            expiry=share.expires_at,
+        )
+        if action:
+            _audit_share_change(session, principal, share, action=action)
+        session.commit()
+        return _file_share_response(share)
+    except FileStorageError as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+
+
+@router.post("/bulk-shares", response_model=BulkFileShareResponse)
+def create_bulk_shares(
+    payload: BulkFileShareRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:share")),
+):
+    try:
+        file_ids = list(dict.fromkeys(payload.file_ids))
+        assets = [
+            get_asset_for_share_management(
+                session,
+                tenant_id=principal.tenant_id,
+                user_id=principal.user.id,
+                asset_id=file_id,
+                is_admin=_is_admin(principal),
+            )
+            for file_id in file_ids
+        ]
+        previous_by_asset = {
+            asset.id: current_file_share_for_target(
+                session,
+                tenant_id=principal.tenant_id,
+                asset_id=asset.id,
+                target_type=payload.target_type,
+                target_id=payload.target_id,
+            )
+            for asset in assets
+        }
+        previous_values = {
+            asset_id: (
+                share.permission if share else None,
+                share.expires_at if share else None,
+            )
+            for asset_id, share in previous_by_asset.items()
+        }
+        shares = share_files(
+            session,
+            tenant_id=principal.tenant_id,
+            assets=assets,
+            target_type=payload.target_type,
+            target_id=payload.target_id,
+            permission=payload.permission,
+            user_id=principal.user.id,
+            expires_at=payload.expires_at,
+        )
+        session.flush()
+        for share in shares:
+            previous_permission, previous_expiry = previous_values[share.file_asset_id]
+            action = _share_audit_action(
+                existed=previous_by_asset[share.file_asset_id] is not None,
+                previous_permission=previous_permission,
+                permission=share.permission,
+                previous_expiry=previous_expiry,
+                expiry=share.expires_at,
+            )
+            if action:
+                _audit_share_change(session, principal, share, action=action)
+        session.commit()
+        return BulkFileShareResponse(
+            shared_count=len(shares),
+            shares=[_file_share_response(share) for share in shares],
+        )
+    except FileStorageError as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+
+
+@router.delete("/{file_id}/shares/{share_id}", response_model=FileShareResponse)
+def revoke_share(
+    file_id: str,
+    share_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:share")),
+):
+    try:
+        asset = get_asset_for_share_management(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            asset_id=file_id,
+            is_admin=_is_admin(principal),
+        )
+        share, changed = revoke_file_share(
+            session,
+            tenant_id=principal.tenant_id,
+            asset_id=asset.id,
+            share_id=share_id,
+            user_id=principal.user.id,
+        )
+        if changed:
+            _audit_share_change(
+                session, principal, share, action="files.share.revoked"
+            )
+        session.commit()
+        return _file_share_response(share)
+    except FileStorageError as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+
+
+def _share_audit_action(
+    *,
+    existed: bool,
+    previous_permission: str | None,
+    permission: str,
+    previous_expiry: datetime | None,
+    expiry: datetime | None,
+) -> str | None:
+    if not existed:
+        return "files.share.granted"
+    permission_changed = previous_permission != permission
+    expiry_changed = _normalized_expiry(previous_expiry) != _normalized_expiry(expiry)
+    if permission_changed:
+        return "files.share.changed"
+    if expiry_changed:
+        return "files.share.expiry_changed"
+    return None
+
+
+def _audit_share_change(
+    session: Session,
+    principal: ApiPrincipal,
+    share,
+    *,
+    action: str,
+) -> None:
+    audit_from_principal(
+        session,
+        principal,
+        action=action,
+        object_type="file_share",
+        object_id=share.id,
+        details={
+            "file_asset_id": share.file_asset_id,
+            "target_type": share.target_type,
+            "target_id": share.target_id,
+            "permission": share.permission,
+            "expires_at": _normalized_expiry(share.expires_at),
+        },
+    )
+
+
+def _normalized_expiry(value: datetime | None) -> str | None:
+    if value is None:
+        return None
+    if value.tzinfo is None:
+        value = value.replace(tzinfo=timezone.utc)
+    return value.astimezone(timezone.utc).isoformat()

src/govoplan_files/backend/routes/spaces.py

@@ -0,0 +1,308 @@
+from __future__ import annotations
+
+import json
+from typing import Literal
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal, require_scope
+from govoplan_files.backend.change_tracking import (
+    FILES_CONNECTOR_SPACES_COLLECTION,
+)
+from govoplan_files.backend.schemas import (
+    FileConnectorSpaceCreateRequest,
+    FileConnectorSpaceResponse,
+    FileConnectorSpacesResponse,
+    FileConnectorSpaceUpdateRequest,
+    FileSpaceResponse,
+    FileSpacesResponse,
+)
+from govoplan_core.db.session import get_session
+from govoplan_files.backend.storage.access import group_refs_for_ids, user_group_ids
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.connector_spaces import (
+    connector_space_owner_id,
+    create_connector_space,
+    get_connector_space_for_user,
+    list_connector_spaces_for_user,
+    soft_delete_connector_space,
+    update_connector_space,
+    validate_connector_space_write_mode,
+)
+from govoplan_files.backend.storage.connector_policy import (
+    ConnectorPolicyDenied,
+)
+
+
+from govoplan_files.backend.route_support import (
+    FILES_CONNECTOR_SPACE_RESOURCE,
+    _connector_policy_error,
+    _connector_space_file_space_response,
+    _connector_space_policy_decision,
+    _connector_space_response,
+    _http_error,
+    _is_admin,
+    _record_connector_settings_change,
+    _visible_connector_profile,
+)
+
+router = APIRouter(prefix="/files", tags=["files"])
+
+
+@router.get("/spaces", response_model=FileSpacesResponse)
+def list_file_spaces(
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:read")),
+):
+    spaces = [
+        FileSpaceResponse(
+            id=f"user:{principal.user.id}",
+            label="My files",
+            owner_type="user",
+            owner_id=principal.user.id,
+            description="Files owned by your user account.",
+        )
+    ]
+    group_ids = user_group_ids(
+        session,
+        tenant_id=principal.tenant_id,
+        user_id=principal.user.id,
+        include_admin_groups=_is_admin(principal),
+    )
+    if group_ids:
+        groups = group_refs_for_ids(tenant_id=principal.tenant_id, group_ids=group_ids)
+        spaces.extend(
+            FileSpaceResponse(
+                id=f"group:{group.id}",
+                label=f"{group.name} files",
+                owner_type="group",
+                owner_id=group.id,
+                description="Files owned by this group.",
+            )
+            for group in groups
+        )
+    connector_spaces = list_connector_spaces_for_user(
+        session,
+        tenant_id=principal.tenant_id,
+        user_id=principal.user.id,
+        is_admin=_is_admin(principal),
+    )
+    spaces.extend(
+        _connector_space_file_space_response(space) for space in connector_spaces
+    )
+    return FileSpacesResponse(spaces=spaces)
+
+
+@router.get("/connector-spaces", response_model=FileConnectorSpacesResponse)
+def list_file_connector_spaces(
+    owner_type: Literal["user", "group"] | None = None,
+    owner_id: str | None = None,
+    include_inactive: bool = False,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:read")),
+):
+    try:
+        spaces = list_connector_spaces_for_user(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            owner_type=owner_type,
+            owner_id=owner_id,
+            include_inactive=include_inactive and _is_admin(principal),
+            is_admin=_is_admin(principal),
+        )
+        return FileConnectorSpacesResponse(
+            spaces=[_connector_space_response(space) for space in spaces]
+        )
+    except FileStorageError as exc:
+        raise _http_error(exc) from exc
+
+
+@router.post(
+    "/connector-spaces",
+    response_model=FileConnectorSpaceResponse,
+    status_code=status.HTTP_201_CREATED,
+)
+def create_file_connector_space(
+    payload: FileConnectorSpaceCreateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:organize")),
+):
+    if payload.owner_type == "group" and not payload.owner_id:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="owner_id is required for group connector spaces",
+        )
+    target_owner = payload.owner_id or principal.user.id
+    try:
+        profile = _visible_connector_profile(
+            session, principal, payload.connector_profile_id
+        )
+        decision = _connector_space_policy_decision(
+            profile,
+            library_id=payload.library_id,
+            remote_path=payload.remote_path,
+            operation="link",
+        )
+        if not decision.allowed:
+            raise ConnectorPolicyDenied(decision)
+        validate_connector_space_write_mode(profile, read_only=payload.read_only)
+        space = create_connector_space(
+            session,
+            tenant_id=principal.tenant_id,
+            owner_type=payload.owner_type,
+            owner_id=target_owner,
+            user_id=principal.user.id,
+            label=payload.label,
+            profile=profile,
+            library_id=payload.library_id,
+            remote_path=payload.remote_path,
+            sync_mode=payload.sync_mode,
+            read_only=payload.read_only,
+            metadata=payload.metadata,
+            is_admin=_is_admin(principal),
+        )
+        _record_connector_settings_change(
+            session,
+            collection=FILES_CONNECTOR_SPACES_COLLECTION,
+            resource_type=FILES_CONNECTOR_SPACE_RESOURCE,
+            resource_id=space.id,
+            operation="created",
+            principal=principal,
+            tenant_id=space.tenant_id,
+            payload={
+                "owner_type": space.owner_type,
+                "owner_id": connector_space_owner_id(space),
+            },
+        )
+        session.commit()
+        return _connector_space_response(space)
+    except ConnectorPolicyDenied as exc:
+        session.rollback()
+        raise _connector_policy_error(exc) from exc
+    except (FileStorageError, ValueError, json.JSONDecodeError) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+
+
+@router.patch("/connector-spaces/{space_id}", response_model=FileConnectorSpaceResponse)
+def update_file_connector_space(
+    space_id: str,
+    payload: FileConnectorSpaceUpdateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:organize")),
+):
+    try:
+        space = get_connector_space_for_user(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            space_id=space_id,
+            include_inactive=_is_admin(principal),
+            is_admin=_is_admin(principal),
+        )
+    except FileStorageError as exc:
+        raise _http_error(exc, not_found=True) from exc
+    try:
+        if (
+            payload.library_id is not None
+            or payload.remote_path is not None
+            or payload.read_only is not None
+        ):
+            profile = _visible_connector_profile(
+                session, principal, space.connector_profile_id
+            )
+            decision = _connector_space_policy_decision(
+                profile,
+                library_id=payload.library_id
+                if payload.library_id is not None
+                else space.library_id,
+                remote_path=payload.remote_path
+                if payload.remote_path is not None
+                else space.remote_path,
+                operation="link",
+            )
+            if not decision.allowed:
+                raise ConnectorPolicyDenied(decision)
+            validate_connector_space_write_mode(
+                profile,
+                read_only=(
+                    payload.read_only
+                    if payload.read_only is not None
+                    else space.read_only
+                ),
+            )
+        update_connector_space(
+            session,
+            space,
+            user_id=principal.user.id,
+            label=payload.label,
+            library_id=payload.library_id,
+            remote_path=payload.remote_path,
+            sync_mode=payload.sync_mode,
+            read_only=payload.read_only,
+            is_active=payload.is_active,
+            metadata=payload.metadata,
+            is_admin=_is_admin(principal),
+        )
+        _record_connector_settings_change(
+            session,
+            collection=FILES_CONNECTOR_SPACES_COLLECTION,
+            resource_type=FILES_CONNECTOR_SPACE_RESOURCE,
+            resource_id=space.id,
+            operation="updated",
+            principal=principal,
+            tenant_id=space.tenant_id,
+            payload={
+                "owner_type": space.owner_type,
+                "owner_id": connector_space_owner_id(space),
+            },
+        )
+        session.commit()
+        return _connector_space_response(space)
+    except ConnectorPolicyDenied as exc:
+        session.rollback()
+        raise _connector_policy_error(exc) from exc
+    except (FileStorageError, ValueError, json.JSONDecodeError) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+
+
+@router.delete(
+    "/connector-spaces/{space_id}", response_model=FileConnectorSpaceResponse
+)
+def delete_file_connector_space(
+    space_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:organize")),
+):
+    try:
+        space = get_connector_space_for_user(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            space_id=space_id,
+            include_inactive=True,
+            is_admin=_is_admin(principal),
+        )
+        soft_delete_connector_space(
+            session, space, user_id=principal.user.id, is_admin=_is_admin(principal)
+        )
+        _record_connector_settings_change(
+            session,
+            collection=FILES_CONNECTOR_SPACES_COLLECTION,
+            resource_type=FILES_CONNECTOR_SPACE_RESOURCE,
+            resource_id=space.id,
+            operation="deleted",
+            principal=principal,
+            tenant_id=space.tenant_id,
+            payload={
+                "owner_type": space.owner_type,
+                "owner_id": connector_space_owner_id(space),
+            },
+        )
+        session.commit()
+        return _connector_space_response(space)
+    except FileStorageError as exc:
+        session.rollback()
+        raise _http_error(exc, not_found=True) from exc

src/govoplan_files/backend/routes/transfers.py

@@ -0,0 +1,213 @@
+from __future__ import annotations
+
+import tempfile
+from fastapi import APIRouter, Depends
+from fastapi.responses import FileResponse
+from starlette.background import BackgroundTask
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal, require_scope
+from govoplan_files.backend.schemas import (
+    ArchiveRequest,
+    PatternMatchResponse,
+    PatternResolveRequest,
+    PatternResolveResponse,
+    RenamePreviewItem,
+    RenameRequest,
+    RenameResponse,
+    TransferRequest,
+    TransferResponse,
+    _conflict_resolutions,
+)
+from govoplan_core.db.session import get_session
+from govoplan_files.backend.storage.paths import (
+    UnsafeFilePathError,
+    filename_from_path,
+    normalize_logical_path,
+)
+from govoplan_files.backend.storage.archives import create_zip_file
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.files import (
+    get_asset_for_user,
+    list_assets_for_user,
+)
+from govoplan_files.backend.storage.search import resolve_patterns
+from govoplan_files.backend.storage.transfers import (
+    rename_selection,
+    transfer_selection,
+)
+
+
+from govoplan_files.backend.route_support import (
+    _asset_response,
+    _attachment_disposition,
+    _audit_connector_access,
+    _cleanup_temp_file,
+    _ensure_campaign_file_access,
+    _ensure_list_owner_access,
+    _http_error,
+    _is_admin,
+)
+
+router = APIRouter(prefix="/files", tags=["files"])
+
+
+@router.post("/bulk-rename", response_model=RenameResponse)
+def bulk_rename(
+    payload: RenameRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:organize")),
+):
+    try:
+        plan = rename_selection(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            file_ids=payload.file_ids,
+            folder_paths=payload.folder_paths,
+            owner_type=payload.owner_type,
+            owner_id=payload.owner_id,
+            mode=payload.mode,
+            new_name=payload.new_name,
+            find=payload.find,
+            replacement=payload.replacement,
+            prefix=payload.prefix,
+            suffix=payload.suffix,
+            recursive=payload.recursive,
+            dry_run=payload.dry_run,
+            is_admin=_is_admin(principal),
+        )
+        if not payload.dry_run:
+            session.commit()
+        return RenameResponse(
+            dry_run=payload.dry_run,
+            items=[
+                RenamePreviewItem(
+                    kind=item.kind,
+                    id=item.id,
+                    file_id=item.id if item.kind == "file" else None,
+                    folder_path=item.old_path if item.kind == "folder" else None,
+                    old_path=item.old_path,
+                    new_path=item.new_path,
+                )
+                for item in plan
+            ],
+        )
+    except (FileStorageError, UnsafeFilePathError, ValueError) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+
+
+@router.post("/transfer", response_model=TransferResponse)
+def transfer_files(
+    payload: TransferRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:organize")),
+):
+    try:
+        files, folders = transfer_selection(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            operation=payload.operation,
+            file_ids=payload.file_ids,
+            folder_paths=payload.folder_paths,
+            source_owner_type=payload.source_owner_type,
+            source_owner_id=payload.source_owner_id,
+            target_owner_type=payload.target_owner_type,
+            target_owner_id=payload.target_owner_id,
+            target_folder=payload.target_folder,
+            conflict_strategy=payload.conflict_strategy,
+            conflict_resolutions=_conflict_resolutions(payload.conflict_resolutions),
+            is_admin=_is_admin(principal),
+        )
+        session.commit()
+        return TransferResponse(
+            operation=payload.operation, files=files, folders=folders
+        )
+    except (FileStorageError, UnsafeFilePathError, ValueError) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+
+
+@router.post("/archive.zip")
+def download_archive(
+    payload: ArchiveRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:download")),
+):
+    try:
+        assets = [
+            get_asset_for_user(
+                session,
+                tenant_id=principal.tenant_id,
+                user_id=principal.user.id,
+                asset_id=file_id,
+                is_admin=_is_admin(principal),
+            )
+            for file_id in payload.file_ids
+        ]
+        tmp = tempfile.NamedTemporaryFile(
+            prefix="govoplan-files-", suffix=".zip", delete=False
+        )
+        tmp_path = tmp.name
+        tmp.close()
+        try:
+            create_zip_file(session, assets, tmp_path)
+        except Exception:
+            _cleanup_temp_file(tmp_path)
+            raise
+        _audit_connector_access(session, principal, assets, operation="archive")
+    except FileStorageError as exc:
+        raise _http_error(exc) from exc
+    filename = filename_from_path(
+        normalize_logical_path(payload.filename, fallback_filename="files.zip")
+    )
+    headers = {"Content-Disposition": _attachment_disposition(filename)}
+    return FileResponse(
+        tmp_path,
+        media_type="application/zip",
+        headers=headers,
+        background=BackgroundTask(_cleanup_temp_file, tmp_path),
+    )
+
+
+@router.post("/resolve-patterns", response_model=PatternResolveResponse)
+def resolve_file_patterns(
+    payload: PatternResolveRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:read")),
+):
+    _ensure_list_owner_access(session, principal, payload.owner_type, payload.owner_id)
+    _ensure_campaign_file_access(session, principal, payload.campaign_id)
+    try:
+        assets = list_assets_for_user(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            owner_type=payload.owner_type,
+            owner_id=payload.owner_id,
+            campaign_id=payload.campaign_id,
+            path_prefix=payload.path_prefix,
+            is_admin=_is_admin(principal),
+        )
+        resolved, unmatched = resolve_patterns(
+            assets,
+            payload.patterns,
+            base_path=payload.path_prefix,
+            case_sensitive=payload.case_sensitive,
+        )
+        return PatternResolveResponse(
+            patterns=[
+                PatternMatchResponse(
+                    pattern=item.pattern,
+                    matches=[_asset_response(session, asset) for asset in item.matches],
+                )
+                for item in resolved
+            ],
+            unmatched=[_asset_response(session, asset) for asset in unmatched]
+            if payload.include_unmatched
+            else [],
+        )
+    except (FileStorageError, UnsafeFilePathError, ValueError) as exc:
+        raise _http_error(exc) from exc

src/govoplan_files/backend/routes/uploads.py

@@ -0,0 +1,487 @@
+from __future__ import annotations
+
+import hashlib
+import hmac
+import json
+from datetime import UTC, datetime, timedelta
+from typing import Literal
+from fastapi import APIRouter, Depends, File as FastAPIFile, Form, UploadFile
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal, require_scope
+from govoplan_core.security.secrets import (
+    TransientPayloadError,
+    open_transient_payload,
+    seal_transient_payload,
+)
+from govoplan_files.backend.schemas import (
+    ArchiveEntryResponse,
+    ArchivePreviewResponse,
+    ConflictResolutionRequest,
+    FileUploadResponse,
+    _conflict_resolutions,
+)
+from govoplan_files.backend.db.models import FileAsset
+from govoplan_core.db.session import get_session
+from govoplan_files.backend.runtime import settings
+from govoplan_files.backend.storage.paths import (
+    UnsafeFilePathError,
+    normalize_folder,
+)
+from govoplan_files.backend.storage.archives import (
+    archive_format_for_filename,
+    extract_archive_upload,
+    extract_zip_upload,
+    inspect_archive,
+)
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.connector_policy import (
+    ConnectorPolicyDenied,
+)
+from govoplan_files.backend.storage.files import (
+    create_file_asset,
+)
+
+
+from govoplan_files.backend.route_support import (
+    _asset_response,
+    _audit_connector_imports,
+    _cleanup_temp_file,
+    _connector_policy_error,
+    _enforce_connector_policy,
+    _http_error,
+    _is_admin,
+    _read_limited_upload,
+    _source_metadata_from_form,
+    _spool_limited_upload_to_temp,
+)
+
+router = APIRouter(prefix="/files", tags=["files"])
+_ARCHIVE_PREVIEW_PURPOSE = "files.archive-preview.v1"
+
+
+def _archive_suffix(filename: str) -> str:
+    lowered = filename.casefold()
+    for suffix in (".tar.bz2", ".tar.gz", ".tar.xz", ".tbz2", ".tgz", ".txz", ".tar", ".zip"):
+        if lowered.endswith(suffix):
+            return suffix
+    return ".archive"
+
+
+def _archive_sha256(path: str) -> str:
+    digest = hashlib.sha256()
+    with open(path, "rb") as source:
+        while chunk := source.read(1024 * 1024):
+            digest.update(chunk)
+    return digest.hexdigest()
+
+
+def _archive_selected_paths(value: str) -> list[str]:
+    parsed = json.loads(value)
+    if not isinstance(parsed, list) or not parsed:
+        raise FileStorageError("Select at least one archive file or folder")
+    if len(parsed) > settings.file_archive_max_entries:
+        raise FileStorageError(
+            "Archive selection exceeds the configured entry limit"
+        )
+    selected: list[str] = []
+    for item in parsed:
+        if not isinstance(item, str) or not item.strip():
+            raise FileStorageError("Archive selection contains an invalid path")
+        if len(item) > 4096:
+            raise FileStorageError("Archive selection path is too long")
+        selected.append(item)
+    return selected
+
+
+def _validate_archive_preview_token(
+    token: str,
+    *,
+    tenant_id: str,
+    user_id: str,
+    owner_type: str,
+    owner_id: str,
+    path: str,
+    campaign_id: str | None,
+    archive_format: str,
+    archive_sha256: str,
+) -> None:
+    payload = open_transient_payload(
+        token,
+        ttl_seconds=settings.file_archive_preview_ttl_seconds,
+    )
+    expected = {
+        "purpose": _ARCHIVE_PREVIEW_PURPOSE,
+        "tenant_id": tenant_id,
+        "user_id": user_id,
+        "owner_type": owner_type,
+        "owner_id": owner_id,
+        "path": path,
+        "campaign_id": campaign_id or "",
+        "archive_format": archive_format,
+    }
+    if any(payload.get(key) != value for key, value in expected.items()):
+        raise FileStorageError(
+            "Archive preview does not match this upload destination"
+        )
+    token_digest = payload.get("archive_sha256")
+    if not isinstance(token_digest, str) or not hmac.compare_digest(
+        token_digest, archive_sha256
+    ):
+        raise FileStorageError(
+            "Archive contents changed after preview; preview it again"
+        )
+
+
+@router.post("/archive-preview", response_model=ArchivePreviewResponse)
+def preview_archive_upload(
+    file: UploadFile = FastAPIFile(...),
+    owner_type: Literal["user", "group"] = Form(default="user"),
+    owner_id: str | None = Form(default=None),
+    path: str = Form(default=""),
+    campaign_id: str | None = Form(default=None),
+    password: str | None = Form(default=None),
+    principal: ApiPrincipal = Depends(require_scope("files:file:upload")),
+):
+    target_owner = owner_id or principal.user.id
+    archive_path: str | None = None
+    filename = file.filename or "archive"
+    try:
+        archive_format = archive_format_for_filename(filename)
+        archive_path = _spool_limited_upload_to_temp(
+            file,
+            max_bytes=settings.file_upload_zip_max_bytes,
+            suffix=_archive_suffix(filename),
+        )
+        inspection = inspect_archive(
+            archive_path,
+            filename=filename,
+            password=password,
+            max_entries=settings.file_archive_max_entries,
+            max_expanded_bytes=settings.file_archive_max_expanded_bytes,
+            max_expansion_ratio=settings.file_archive_max_expansion_ratio,
+        )
+        digest = _archive_sha256(archive_path)
+        normalized_path = normalize_folder(path)
+        preview_token = seal_transient_payload(
+            {
+                "purpose": _ARCHIVE_PREVIEW_PURPOSE,
+                "tenant_id": principal.tenant_id,
+                "user_id": principal.user.id,
+                "owner_type": owner_type,
+                "owner_id": target_owner,
+                "path": normalized_path,
+                "campaign_id": campaign_id or "",
+                "archive_format": archive_format,
+                "archive_sha256": digest,
+            }
+        )
+        expires_at = datetime.now(UTC) + timedelta(
+            seconds=settings.file_archive_preview_ttl_seconds
+        )
+        return ArchivePreviewResponse(
+            preview_token=preview_token,
+            archive_format=inspection.archive_format,
+            entries=[
+                ArchiveEntryResponse(
+                    path=entry.path,
+                    kind=entry.kind,
+                    size_bytes=entry.size_bytes,
+                    compressed_size_bytes=entry.compressed_size_bytes,
+                    encrypted=entry.encrypted,
+                )
+                for entry in inspection.entries
+            ],
+            file_count=inspection.file_count,
+            directory_count=inspection.directory_count,
+            expanded_size_bytes=inspection.expanded_size_bytes,
+            compressed_size_bytes=inspection.compressed_size_bytes,
+            requires_password=inspection.requires_password,
+            password_verified=inspection.password_verified,
+            expires_at=expires_at.isoformat(),
+        )
+    except (FileStorageError, UnsafeFilePathError, ValueError) as exc:
+        raise _http_error(exc) from exc
+    finally:
+        if archive_path:
+            _cleanup_temp_file(archive_path)
+
+
+@router.post("/archive-confirm", response_model=FileUploadResponse)
+def confirm_archive_upload(
+    file: UploadFile = FastAPIFile(...),
+    preview_token: str = Form(...),
+    selected_paths_json: str = Form(...),
+    owner_type: Literal["user", "group"] = Form(default="user"),
+    owner_id: str | None = Form(default=None),
+    path: str = Form(default=""),
+    campaign_id: str | None = Form(default=None),
+    password: str | None = Form(default=None),
+    conflict_strategy: Literal["reject", "overwrite", "rename"] = Form(
+        default="reject"
+    ),
+    conflict_resolutions_json: str | None = Form(default=None),
+    source_provenance_json: str | None = Form(default=None),
+    source_revision: str | None = Form(default=None),
+    connector_policy_json: str | None = Form(default=None),
+    encryption_vault_id: str | None = Form(default=None),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:upload")),
+):
+    target_owner = owner_id or principal.user.id
+    archive_path: str | None = None
+    filename = file.filename or "archive"
+    try:
+        raw_resolutions = (
+            json.loads(conflict_resolutions_json)
+            if conflict_resolutions_json
+            else []
+        )
+        upload_resolutions = _conflict_resolutions(
+            [ConflictResolutionRequest(**item) for item in raw_resolutions]
+        )
+        selected_paths = _archive_selected_paths(selected_paths_json)
+        _enforce_connector_policy(
+            source_provenance_json,
+            connector_policy_json,
+            operation="import",
+        )
+        metadata = _source_metadata_from_form(
+            source_provenance_json, source_revision
+        )
+        archive_format = archive_format_for_filename(filename)
+        normalized_path = normalize_folder(path)
+        archive_path = _spool_limited_upload_to_temp(
+            file,
+            max_bytes=settings.file_upload_zip_max_bytes,
+            suffix=_archive_suffix(filename),
+        )
+        digest = _archive_sha256(archive_path)
+        _validate_archive_preview_token(
+            preview_token,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            owner_type=owner_type,
+            owner_id=target_owner,
+            path=normalized_path,
+            campaign_id=campaign_id,
+            archive_format=archive_format,
+            archive_sha256=digest,
+        )
+        extracted = extract_archive_upload(
+            session,
+            tenant_id=principal.tenant_id,
+            owner_type=owner_type,
+            owner_id=target_owner,
+            user_id=principal.user.id,
+            archive_data=archive_path,
+            filename=filename,
+            folder=normalized_path,
+            campaign_id=campaign_id,
+            selected_paths=selected_paths,
+            password=password,
+            conflict_strategy=conflict_strategy,
+            conflict_resolutions=upload_resolutions,
+            metadata=metadata,
+            is_admin=_is_admin(principal),
+            encryption_vault_id=encryption_vault_id,
+            max_entries=settings.file_archive_max_entries,
+            max_file_bytes=settings.file_upload_max_bytes,
+            max_expanded_bytes=settings.file_archive_max_expanded_bytes,
+            max_expansion_ratio=settings.file_archive_max_expansion_ratio,
+        )
+        uploaded_assets = [item.asset for item in extracted]
+        _audit_connector_imports(session, principal, uploaded_assets)
+        session.commit()
+        return FileUploadResponse(
+            files=[
+                _asset_response(session, asset, include_shares=True)
+                for asset in uploaded_assets
+            ]
+        )
+    except ConnectorPolicyDenied as exc:
+        session.rollback()
+        raise _connector_policy_error(exc) from exc
+    except (
+        FileStorageError,
+        TransientPayloadError,
+        UnsafeFilePathError,
+        ValueError,
+        json.JSONDecodeError,
+    ) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+    finally:
+        if archive_path:
+            _cleanup_temp_file(archive_path)
+
+
+@router.post("/upload", response_model=FileUploadResponse)
+def upload_files(
+    files: list[UploadFile] = FastAPIFile(...),
+    owner_type: Literal["user", "group"] = Form(default="user"),
+    owner_id: str | None = Form(default=None),
+    path: str = Form(default=""),
+    campaign_id: str | None = Form(default=None),
+    unpack_zip: bool = Form(default=False),
+    conflict_strategy: Literal["reject", "overwrite", "rename"] = Form(
+        default="reject"
+    ),
+    conflict_resolutions_json: str | None = Form(default=None),
+    source_provenance_json: str | None = Form(default=None),
+    source_revision: str | None = Form(default=None),
+    connector_policy_json: str | None = Form(default=None),
+    encryption_vault_id: str | None = Form(default=None),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:upload")),
+):
+    target_owner = owner_id or principal.user.id
+    uploaded_assets: list[FileAsset] = []
+    try:
+        raw_resolutions = (
+            json.loads(conflict_resolutions_json) if conflict_resolutions_json else []
+        )
+        upload_resolutions = _conflict_resolutions(
+            [ConflictResolutionRequest(**item) for item in raw_resolutions]
+        )
+        _enforce_connector_policy(
+            source_provenance_json, connector_policy_json, operation="import"
+        )
+        metadata = _source_metadata_from_form(source_provenance_json, source_revision)
+        for upload in files:
+            filename = upload.filename or "file"
+            content_type = upload.content_type or None
+            upload_limit = (
+                settings.file_upload_zip_max_bytes
+                if unpack_zip and filename.lower().endswith(".zip")
+                else settings.file_upload_max_bytes
+            )
+            if unpack_zip and filename.lower().endswith(".zip"):
+                zip_path = _spool_limited_upload_to_temp(
+                    upload, max_bytes=upload_limit, suffix=".zip"
+                )
+                try:
+                    extracted = extract_zip_upload(
+                        session,
+                        tenant_id=principal.tenant_id,
+                        owner_type=owner_type,
+                        owner_id=target_owner,
+                        user_id=principal.user.id,
+                        zip_data=zip_path,
+                        folder=path,
+                        campaign_id=campaign_id,
+                        conflict_strategy=conflict_strategy,
+                        conflict_resolutions=upload_resolutions,
+                        metadata=metadata,
+                        is_admin=_is_admin(principal),
+                        encryption_vault_id=encryption_vault_id,
+                        max_file_bytes=settings.file_upload_max_bytes,
+                        max_total_bytes=settings.file_upload_zip_max_bytes,
+                    )
+                finally:
+                    _cleanup_temp_file(zip_path)
+                uploaded_assets.extend(item.asset for item in extracted)
+                continue
+            data = _read_limited_upload(upload, max_bytes=upload_limit)
+            stored = create_file_asset(
+                session,
+                tenant_id=principal.tenant_id,
+                owner_type=owner_type,
+                owner_id=target_owner,
+                user_id=principal.user.id,
+                filename=filename,
+                data=data,
+                folder=path,
+                content_type=content_type,
+                campaign_id=campaign_id,
+                conflict_strategy=conflict_strategy,
+                conflict_resolutions=upload_resolutions,
+                metadata=metadata,
+                is_admin=_is_admin(principal),
+                encryption_vault_id=encryption_vault_id,
+            )
+            uploaded_assets.append(stored.asset)
+        _audit_connector_imports(session, principal, uploaded_assets)
+        session.commit()
+    except ConnectorPolicyDenied as exc:
+        session.rollback()
+        raise _connector_policy_error(exc) from exc
+    except (FileStorageError, UnsafeFilePathError, ValueError) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+    return FileUploadResponse(
+        files=[
+            _asset_response(session, asset, include_shares=True)
+            for asset in uploaded_assets
+        ]
+    )
+
+
+@router.post("/upload-zip", response_model=FileUploadResponse)
+def upload_zip(
+    file: UploadFile = FastAPIFile(...),
+    owner_type: Literal["user", "group"] = Form(default="user"),
+    owner_id: str | None = Form(default=None),
+    path: str = Form(default=""),
+    campaign_id: str | None = Form(default=None),
+    conflict_strategy: Literal["reject", "overwrite", "rename"] = Form(
+        default="reject"
+    ),
+    conflict_resolutions_json: str | None = Form(default=None),
+    source_provenance_json: str | None = Form(default=None),
+    source_revision: str | None = Form(default=None),
+    connector_policy_json: str | None = Form(default=None),
+    encryption_vault_id: str | None = Form(default=None),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("files:file:upload")),
+):
+    target_owner = owner_id or principal.user.id
+    zip_path: str | None = None
+    try:
+        raw_resolutions = (
+            json.loads(conflict_resolutions_json) if conflict_resolutions_json else []
+        )
+        upload_resolutions = _conflict_resolutions(
+            [ConflictResolutionRequest(**item) for item in raw_resolutions]
+        )
+        _enforce_connector_policy(
+            source_provenance_json, connector_policy_json, operation="import"
+        )
+        metadata = _source_metadata_from_form(source_provenance_json, source_revision)
+        zip_path = _spool_limited_upload_to_temp(
+            file, max_bytes=settings.file_upload_zip_max_bytes, suffix=".zip"
+        )
+        extracted = extract_zip_upload(
+            session,
+            tenant_id=principal.tenant_id,
+            owner_type=owner_type,
+            owner_id=target_owner,
+            user_id=principal.user.id,
+            zip_data=zip_path,
+            folder=path,
+            campaign_id=campaign_id,
+            conflict_strategy=conflict_strategy,
+            conflict_resolutions=upload_resolutions,
+            metadata=metadata,
+            is_admin=_is_admin(principal),
+            encryption_vault_id=encryption_vault_id,
+            max_file_bytes=settings.file_upload_max_bytes,
+            max_total_bytes=settings.file_upload_zip_max_bytes,
+        )
+        _audit_connector_imports(session, principal, [item.asset for item in extracted])
+        session.commit()
+    except ConnectorPolicyDenied as exc:
+        session.rollback()
+        raise _connector_policy_error(exc) from exc
+    except (FileStorageError, UnsafeFilePathError, ValueError) as exc:
+        session.rollback()
+        raise _http_error(exc) from exc
+    finally:
+        if zip_path:
+            _cleanup_temp_file(zip_path)
+    return FileUploadResponse(
+        files=[
+            _asset_response(session, item.asset, include_shares=True)
+            for item in extracted
+        ]
+    )

src/govoplan_files/backend/runtime.py

@@ -1,29 +1,10 @@
 from __future__ import annotations
 
-from typing import Any
+from govoplan_core.core.runtime import ModuleRuntimeState
 
-_runtime_settings: object | None = None
+_runtime = ModuleRuntimeState("Files")
 
-
-def configure_runtime(*, settings: object | None = None) -> None:
-    global _runtime_settings
-    if settings is not None:
-        _runtime_settings = settings
-
-
-def get_settings() -> object:
-    if _runtime_settings is not None:
-        return _runtime_settings
-    try:
-        from govoplan_core.settings import settings as legacy_settings
-    except ModuleNotFoundError as exc:
-        raise RuntimeError("GovOPlaN Files runtime settings are not configured") from exc
-    return legacy_settings
-
-
-class SettingsProxy:
-    def __getattr__(self, name: str) -> Any:
-        return getattr(get_settings(), name)
-
-
-settings = SettingsProxy()
+configure_runtime = _runtime.configure_runtime
+get_registry = _runtime.get_registry
+get_settings = _runtime.get_settings
+settings = _runtime.settings

src/govoplan_files/backend/schemas.py

@@ -1,9 +1,11 @@
 from __future__ import annotations
 
+from datetime import datetime
 from typing import Any, Literal
 
 from pydantic import BaseModel, Field
 
+from govoplan_core.api.v1.schemas import DeltaDeletedItem
 from govoplan_files.backend.storage.common import FileConflictResolution
 
 
@@ -13,19 +15,168 @@ class FileSpaceResponse(BaseModel):
     owner_type: Literal["user", "group"]
     owner_id: str
     description: str | None = None
+    space_type: Literal["managed", "connector"] = "managed"
+    connector_space_id: str | None = None
+    connector_profile_id: str | None = None
+    provider: str | None = None
+    library_id: str | None = None
+    remote_path: str | None = None
+    sync_mode: str | None = None
+    read_only: bool = False
 
 
 class FileSpacesResponse(BaseModel):
     spaces: list[FileSpaceResponse]
 
 
+class FileConnectorSpaceCreateRequest(BaseModel):
+    owner_type: Literal["user", "group"] = "user"
+    owner_id: str | None = None
+    label: str
+    connector_profile_id: str
+    library_id: str | None = None
+    remote_path: str = ""
+    sync_mode: Literal["manual"] = "manual"
+    read_only: bool = True
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class FileConnectorSpaceUpdateRequest(BaseModel):
+    label: str | None = None
+    library_id: str | None = None
+    remote_path: str | None = None
+    sync_mode: Literal["manual"] | None = None
+    read_only: bool | None = None
+    is_active: bool | None = None
+    metadata: dict[str, Any] | None = None
+
+
+class FileConnectorSpaceResponse(BaseModel):
+    id: str
+    tenant_id: str
+    owner_type: Literal["user", "group"]
+    owner_id: str
+    label: str
+    connector_profile_id: str
+    provider: str
+    library_id: str | None = None
+    remote_path: str = ""
+    sync_mode: str
+    read_only: bool
+    is_active: bool
+    created_at: str
+    updated_at: str
+    deleted_at: str | None = None
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class FileConnectorSpacesResponse(BaseModel):
+    spaces: list[FileConnectorSpaceResponse] = Field(default_factory=list)
+
+
 class FileShareResponse(BaseModel):
     id: str
+    file_asset_id: str
     target_type: str
     target_id: str
     permission: str
+    created_by_user_id: str | None = None
     created_at: str
+    expires_at: str | None = None
     revoked_at: str | None = None
+    revoked_by_user_id: str | None = None
+    active: bool
+
+
+class FileSharesResponse(BaseModel):
+    shares: list[FileShareResponse] = Field(default_factory=list)
+
+
+class FileIntegrityScanCreateRequest(BaseModel):
+    verify_checksums: bool = True
+    batch_size: int = Field(default=100, ge=1, le=1000)
+
+
+class FileIntegrityScanResponse(BaseModel):
+    id: str
+    tenant_id: str
+    storage_backend: str
+    storage_prefix: str
+    status: str
+    revision: int
+    phase: str
+    verify_checksums: bool
+    batch_size: int
+    scanned_blob_count: int
+    verified_blob_count: int
+    quarantined_blob_count: int
+    scanned_object_count: int
+    orphan_object_count: int
+    created_by_user_id: str | None = None
+    started_at: str | None = None
+    completed_at: str | None = None
+    last_error: str | None = None
+    created_at: str
+    updated_at: str
+
+
+class FileIntegrityScansResponse(BaseModel):
+    scans: list[FileIntegrityScanResponse] = Field(default_factory=list)
+
+
+class FileIntegrityFindingResponse(BaseModel):
+    id: str
+    scan_id: str
+    tenant_id: str
+    kind: str
+    state: str
+    revision: int
+    blob_id: str | None = None
+    storage_key: str
+    expected_size_bytes: int | None = None
+    observed_size_bytes: int | None = None
+    expected_checksum_sha256: str | None = None
+    observed_checksum_sha256: str | None = None
+    resolved_at: str | None = None
+    resolved_by_user_id: str | None = None
+    created_at: str
+    updated_at: str
+
+
+class FileIntegrityFindingsResponse(BaseModel):
+    findings: list[FileIntegrityFindingResponse] = Field(default_factory=list)
+
+
+class FileIntegrityActionRequest(BaseModel):
+    dry_run: bool = True
+    expected_revision: int = Field(ge=1)
+
+
+class FileIntegrityScanRunRequest(BaseModel):
+    expected_revision: int = Field(ge=1)
+
+
+class FileIntegrityActionResponse(BaseModel):
+    action: str
+    changed: bool
+    dry_run: bool
+    finding: FileIntegrityFindingResponse
+    inspection_kind: str | None = None
+    inspection_valid: bool | None = None
+
+
+class FileSourceProvenance(BaseModel):
+    source_type: str | None = None
+    connector_id: str | None = None
+    provider: str | None = None
+    external_id: str | None = None
+    external_path: str | None = None
+    external_url: str | None = None
+    revision: str | None = None
+    revision_label: str | None = None
+    observed_at: str | None = None
+    imported_at: str | None = None
+    metadata: dict[str, Any] = Field(default_factory=dict)
 
 
 class FileAssetResponse(BaseModel):
@@ -43,8 +194,14 @@ class FileAssetResponse(BaseModel):
     created_at: str
     updated_at: str
     deleted_at: str | None = None
+    retained_until: str | None = None
+    legal_hold: bool = False
+    lifecycle_revision: int = 1
+    lifecycle_reason: str | None = None
     audit_relevant: bool = False
     metadata: dict[str, Any] | None = None
+    source_provenance: FileSourceProvenance | None = None
+    source_revision: str | None = None
     shares: list[FileShareResponse] = Field(default_factory=list)
 
 
@@ -61,6 +218,9 @@ class FileFolderResponse(BaseModel):
 
 class FileFoldersResponse(BaseModel):
     folders: list[FileFolderResponse]
+    cursor: str | None = None
+    next_cursor: str | None = None
+    watermark: str | None = None
 
 
 class FileFolderCreateRequest(BaseModel):
@@ -83,12 +243,376 @@ class FileFolderDeleteResponse(BaseModel):
 
 class FileListResponse(BaseModel):
     files: list[FileAssetResponse]
+    total: int
+    cursor: str | None = None
+    next_cursor: str | None = None
+    watermark: str | None = None
+
+
+class FileDeltaResponse(BaseModel):
+    files: list[FileAssetResponse] = Field(default_factory=list)
+    folders: list[FileFolderResponse] = Field(default_factory=list)
+    deleted: list[DeltaDeletedItem] = Field(default_factory=list)
+    watermark: str | None = None
+    has_more: bool = False
+    full: bool = False
 
 
 class FileUploadResponse(BaseModel):
     files: list[FileAssetResponse]
 
 
+class ArchiveEntryResponse(BaseModel):
+    path: str
+    kind: Literal["file", "directory"]
+    size_bytes: int
+    compressed_size_bytes: int | None = None
+    encrypted: bool = False
+
+
+class ArchivePreviewResponse(BaseModel):
+    preview_token: str
+    archive_format: str
+    entries: list[ArchiveEntryResponse] = Field(default_factory=list)
+    file_count: int
+    directory_count: int
+    expanded_size_bytes: int
+    compressed_size_bytes: int
+    requires_password: bool
+    password_verified: bool
+    expires_at: str
+
+
+class FileConnectorPolicySource(BaseModel):
+    scope_type: Literal["system", "tenant", "user", "group", "campaign"] = "system"
+    scope_id: str | None = None
+    label: str | None = None
+    policy: dict[str, Any] = Field(default_factory=dict)
+
+
+class FileConnectorPolicyEvaluateRequest(BaseModel):
+    source_provenance: FileSourceProvenance
+    operation: str = "access"
+    policy_sources: list[FileConnectorPolicySource] = Field(default_factory=list)
+
+
+class FileConnectorPolicyEvaluateResponse(BaseModel):
+    decision: dict[str, Any]
+
+
+class FileConnectorPolicyUpdateRequest(BaseModel):
+    policy: dict[str, Any] = Field(default_factory=dict)
+
+
+class FileConnectorPolicyStepResponse(BaseModel):
+    scope_type: str
+    scope_id: str | None = None
+    path: str
+    label: str
+    applied_fields: list[str] = Field(default_factory=list)
+    policy: dict[str, Any] = Field(default_factory=dict)
+
+
+class FileConnectorPolicyResponse(BaseModel):
+    scope_type: Literal["system", "tenant", "user", "group", "campaign"]
+    scope_id: str | None = None
+    policy: dict[str, Any] = Field(default_factory=dict)
+    effective_policy: dict[str, Any] | None = None
+    parent_policy: dict[str, Any] | None = None
+    effective_policy_sources: list[FileConnectorPolicyStepResponse] = Field(default_factory=list)
+    parent_policy_sources: list[FileConnectorPolicyStepResponse] = Field(default_factory=list)
+
+
+class FileConnectorProfileResponse(BaseModel):
+    id: str
+    label: str
+    provider: str
+    endpoint_url: str | None = None
+    base_path: str | None = None
+    enabled: bool = True
+    scope_type: Literal["system", "tenant", "user", "group", "campaign"] = "system"
+    scope_id: str | None = None
+    source_path: str
+    credential_profile_id: str | None = None
+    credential_profile_label: str | None = None
+    credential_mode: str = "none"
+    credential_source: str | None = None
+    credentials_configured: bool = False
+    username: str | None = None
+    capabilities: list[str] = Field(default_factory=list)
+    policy_sources: list[FileConnectorPolicySource] = Field(default_factory=list)
+    metadata: dict[str, Any] = Field(default_factory=dict)
+    source_kind: str = "settings"
+
+
+class FileConnectorProfilesResponse(BaseModel):
+    profiles: list[FileConnectorProfileResponse]
+
+
+class FileConnectorCredentialResponse(BaseModel):
+    id: str
+    label: str
+    provider: str | None = None
+    enabled: bool = True
+    scope_type: Literal["system", "tenant", "user", "group", "campaign"] = "system"
+    scope_id: str | None = None
+    source_path: str
+    credential_mode: str = "none"
+    credential_secret_source: str | None = None
+    credentials_configured: bool = False
+    username: str | None = None
+    policy_sources: list[FileConnectorPolicySource] = Field(default_factory=list)
+    metadata: dict[str, Any] = Field(default_factory=dict)
+    source_kind: str = "database"
+
+
+class FileConnectorCredentialsResponse(BaseModel):
+    credentials: list[FileConnectorCredentialResponse]
+
+
+class FileConnectorSettingsDeltaResponse(BaseModel):
+    profiles: list[FileConnectorProfileResponse] = Field(default_factory=list)
+    credentials: list[FileConnectorCredentialResponse] = Field(default_factory=list)
+    spaces: list[FileConnectorSpaceResponse] = Field(default_factory=list)
+    policy: FileConnectorPolicyResponse | None = None
+    changed_sections: list[str] = Field(default_factory=list)
+    deleted: list[DeltaDeletedItem] = Field(default_factory=list)
+    watermark: str | None = None
+    has_more: bool = False
+    full: bool = False
+
+
+class FileConnectorProfileCredentialsRequest(BaseModel):
+    username: str | None = None
+    password: str | None = None
+    token: str | None = None
+    password_env: str | None = None
+    token_env: str | None = None
+    secret_ref: str | None = None
+
+
+class FileConnectorDiscoveryCandidate(BaseModel):
+    endpoint_url: str
+    status: Literal["failed", "usable", "found", "credentials_rejected"]
+    message: str
+
+
+class FileConnectorDiscoveryRequest(BaseModel):
+    provider: Literal["seafile", "nextcloud", "webdav", "smb", "s3", "sharepoint", "onedrive", "nfs", "dms", "generic"]
+    endpoint_url: str
+    base_path: str | None = None
+    credential_mode: Literal["none", "anonymous", "basic", "token", "secret_ref"] = "none"
+    credentials: FileConnectorProfileCredentialsRequest = Field(default_factory=FileConnectorProfileCredentialsRequest)
+    metadata: dict[str, Any] = Field(default_factory=dict)
+    require_valid_credentials: bool = False
+
+
+class FileConnectorDiscoveryResponse(BaseModel):
+    provider: str
+    endpoint_url: str | None = None
+    base_path: str | None = None
+    status: Literal["usable", "found", "credentials_rejected", "not_found", "unsupported"]
+    message: str
+    candidates: list[FileConnectorDiscoveryCandidate] = Field(default_factory=list)
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class FileConnectorProfileCreateRequest(BaseModel):
+    id: str
+    label: str
+    provider: Literal["seafile", "nextcloud", "webdav", "smb", "s3", "sharepoint", "onedrive", "nfs", "dms", "generic"]
+    endpoint_url: str | None = None
+    base_path: str | None = None
+    enabled: bool = True
+    scope_type: Literal["system", "tenant", "user", "group", "campaign"] = "tenant"
+    scope_id: str | None = None
+    credential_profile_id: str | None = None
+    credential_mode: Literal["none", "anonymous", "basic", "token", "secret_ref"] = "none"
+    credentials: FileConnectorProfileCredentialsRequest = Field(default_factory=FileConnectorProfileCredentialsRequest)
+    capabilities: list[str] = Field(default_factory=lambda: ["browse", "import", "sync"])
+    policy: dict[str, Any] = Field(default_factory=dict)
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class FileConnectorProfileUpdateRequest(BaseModel):
+    label: str | None = None
+    provider: Literal["seafile", "nextcloud", "webdav", "smb", "s3", "sharepoint", "onedrive", "nfs", "dms", "generic"] | None = None
+    endpoint_url: str | None = None
+    base_path: str | None = None
+    enabled: bool | None = None
+    credential_profile_id: str | None = None
+    credential_mode: Literal["none", "anonymous", "basic", "token", "secret_ref"] | None = None
+    credentials: FileConnectorProfileCredentialsRequest | None = None
+    clear_password: bool = False
+    clear_token: bool = False
+    capabilities: list[str] | None = None
+    policy: dict[str, Any] | None = None
+    metadata: dict[str, Any] | None = None
+
+
+class FileConnectorCredentialCreateRequest(BaseModel):
+    id: str
+    label: str
+    provider: Literal["seafile", "nextcloud", "webdav", "smb", "s3", "sharepoint", "onedrive", "nfs", "dms", "generic"] | None = None
+    enabled: bool = True
+    scope_type: Literal["system", "tenant", "user", "group", "campaign"] = "tenant"
+    scope_id: str | None = None
+    credential_mode: Literal["none", "anonymous", "basic", "token", "secret_ref"] = "none"
+    credentials: FileConnectorProfileCredentialsRequest = Field(default_factory=FileConnectorProfileCredentialsRequest)
+    policy: dict[str, Any] = Field(default_factory=dict)
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class FileConnectorCredentialUpdateRequest(BaseModel):
+    label: str | None = None
+    provider: Literal["seafile", "nextcloud", "webdav", "smb", "s3", "sharepoint", "onedrive", "nfs", "dms", "generic"] | None = None
+    enabled: bool | None = None
+    credential_mode: Literal["none", "anonymous", "basic", "token", "secret_ref"] | None = None
+    credentials: FileConnectorProfileCredentialsRequest | None = None
+    clear_password: bool = False
+    clear_token: bool = False
+    policy: dict[str, Any] | None = None
+    metadata: dict[str, Any] | None = None
+
+
+class FileConnectorProviderResponse(BaseModel):
+    provider: str
+    label: str
+    protocol: str
+    implemented: bool
+    installed: bool
+    browse_supported: bool
+    import_supported: bool
+    write_supported: bool = False
+    optional_dependency: str | None = None
+    permission_model: str
+    sync_strategy: str
+    conflict_strategy: str
+    preview_strategy: str
+    audit_events: list[str] = Field(default_factory=list)
+    notes: str | None = None
+
+
+class FileConnectorProvidersResponse(BaseModel):
+    providers: list[FileConnectorProviderResponse]
+
+
+class FileConnectorBrowseItem(BaseModel):
+    kind: Literal["library", "folder", "file"]
+    name: str
+    path: str
+    external_id: str | None = None
+    external_url: str | None = None
+    size_bytes: int | None = None
+    content_type: str | None = None
+    modified_at: str | None = None
+    etag: str | None = None
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class FileConnectorBrowseResponse(BaseModel):
+    profile_id: str
+    provider: str
+    path: str = ""
+    library_id: str | None = None
+    read_only: bool = True
+    next_continuation_token: str | None = None
+    has_more: bool = False
+    decision: dict[str, Any]
+    items: list[FileConnectorBrowseItem]
+
+
+class FileConnectorImportRequest(BaseModel):
+    library_id: str
+    path: str
+    owner_type: Literal["user", "group"] = "user"
+    owner_id: str | None = None
+    target_folder: str | None = None
+    target_path: str | None = None
+    campaign_id: str | None = None
+    conflict_strategy: Literal["reject", "overwrite", "rename", "skip"] = "reject"
+    source_revision: str | None = None
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class FileConnectorSyncResponse(BaseModel):
+    file: FileAssetResponse
+    action: Literal["created", "updated", "unchanged"]
+    previous_version_id: str | None = None
+    current_version_id: str
+
+
+class FileConnectorFolderSyncRequest(BaseModel):
+    path: str = ""
+    target_folder: str | None = None
+    recursive: bool = True
+    conflict_strategy: Literal["reject", "overwrite", "rename", "skip"] = "skip"
+    max_files: int = Field(default=100, ge=1, le=500)
+    max_depth: int = Field(default=12, ge=0, le=50)
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class FileConnectorFolderSyncItemResponse(BaseModel):
+    source_path: str
+    target_path: str | None = None
+    action: Literal[
+        "created",
+        "updated",
+        "unchanged",
+        "skipped",
+        "conflict",
+        "policy_denied",
+        "failed",
+    ]
+    file: FileAssetResponse | None = None
+    previous_version_id: str | None = None
+    current_version_id: str | None = None
+    source_revision: str | None = None
+    detail: str | None = None
+    policy_decision: dict[str, Any] | None = None
+
+
+class FileConnectorFolderSyncSummary(BaseModel):
+    discovered: int = 0
+    created: int = 0
+    updated: int = 0
+    unchanged: int = 0
+    skipped: int = 0
+    conflicts: int = 0
+    policy_denied: int = 0
+    failed: int = 0
+
+
+class FileConnectorFolderSyncResponse(BaseModel):
+    connector_space_id: str
+    connector_profile_id: str
+    provider: str
+    remote_path: str
+    target_folder: str
+    recursive: bool
+    truncated: bool = False
+    summary: FileConnectorFolderSyncSummary
+    items: list[FileConnectorFolderSyncItemResponse] = Field(default_factory=list)
+
+
+class FileConnectorWriteRequest(BaseModel):
+    file_id: str
+    remote_path: str
+    idempotency_key: str = Field(min_length=8, max_length=160)
+    expected_revision: str | None = Field(default=None, max_length=500)
+
+
+class FileConnectorWriteResponse(BaseModel):
+    recovery_operation_id: str
+    status: str
+    replayed: bool = False
+    provider: str
+    remote_path: str
+    revision: str | None = None
+    checksum_sha256: str
+    size_bytes: int
+
+
 class BulkDeleteRequest(BaseModel):
     file_ids: list[str]
 
@@ -97,6 +621,69 @@ class BulkDeleteResponse(BaseModel):
     deleted_count: int
 
 
+class FileLifecycleUpdateRequest(BaseModel):
+    retained_until: datetime | None = None
+    legal_hold: bool = False
+    reason: str = Field(min_length=1, max_length=500)
+    expected_revision: int = Field(ge=1)
+
+
+class FileRestoreResponse(BaseModel):
+    restored_count: int
+
+
+class FileFolderRestoreResponse(BaseModel):
+    restored_folders: int
+    restored_files: int
+
+
+class FilePurgePreviewRequest(BaseModel):
+    file_ids: list[str] = Field(min_length=1, max_length=100)
+
+
+class FilePurgePreviewItem(BaseModel):
+    file_id: str
+    filename: str
+    lifecycle_revision: int
+    deleted_at: str | None = None
+    retained_until: str | None = None
+    legal_hold: bool = False
+    blockers: list[str] = Field(default_factory=list)
+    blob_ids: list[str] = Field(default_factory=list)
+
+
+class FilePurgePreviewResponse(BaseModel):
+    preview_sha256: str
+    eligible: bool
+    items: list[FilePurgePreviewItem]
+
+
+class FilePurgeExecuteRequest(FilePurgePreviewRequest):
+    preview_sha256: str = Field(min_length=64, max_length=64)
+    idempotency_key: str = Field(min_length=8, max_length=160)
+    approval_reference: str = Field(min_length=3, max_length=1000)
+    confirmation: Literal["PURGE"]
+
+
+class FilePurgeResponse(BaseModel):
+    recovery_operation_id: str
+    status: str
+    replayed: bool = False
+    purged_files: int = 0
+    released_blobs: int = 0
+
+
+class FileBlobGcRequest(BaseModel):
+    limit: int = Field(default=25, ge=1, le=100)
+    approval_reference: str = Field(min_length=3, max_length=1000)
+
+
+class FileBlobGcResponse(BaseModel):
+    inspected_blobs: int
+    deleted_blobs: int
+    unresolved_operation_ids: list[str] = Field(default_factory=list)
+
+
 class ConflictResolutionRequest(BaseModel):
     target_path: str
     action: Literal["overwrite", "rename", "skip"]
@@ -111,6 +698,7 @@ class FileShareRequest(BaseModel):
     target_type: Literal["user", "group", "campaign", "tenant"]
     target_id: str
     permission: Literal["read", "write", "manage"] = "read"
+    expires_at: datetime | None = None
 
 
 class BulkFileShareRequest(BaseModel):
@@ -118,6 +706,7 @@ class BulkFileShareRequest(BaseModel):
     target_type: Literal["user", "group", "campaign", "tenant"]
     target_id: str
     permission: Literal["read", "write", "manage"] = "read"
+    expires_at: datetime | None = None
 
 
 class BulkFileShareResponse(BaseModel):
@@ -128,8 +717,8 @@ class BulkFileShareResponse(BaseModel):
 class RenameRequest(BaseModel):
     file_ids: list[str] = Field(default_factory=list)
     folder_paths: list[str] = Field(default_factory=list)
-    owner_type: Literal["user", "group"] | None = None
-    owner_id: str | None = None
+    owner_type: Literal["user", "group"]
+    owner_id: str
     mode: Literal["direct", "prefix", "suffix", "replace"]
     new_name: str | None = None
     find: str | None = None

src/govoplan_files/backend/search_source.py

@@ -0,0 +1,329 @@
+from __future__ import annotations
+
+from collections.abc import Mapping, Sequence
+from urllib.parse import quote
+
+from sqlalchemy import func, or_, select
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal
+from govoplan_core.core.events import PlatformEvent
+from govoplan_core.core.modules import ModuleContext
+from govoplan_core.core.search import (
+    SearchAuthorizationRequest,
+    SearchBackfillPage,
+    SearchBackfillRequest,
+    SearchDocument,
+    SearchIndexChange,
+    SearchResourceReference,
+    SearchResourceType,
+)
+from govoplan_files.backend.db.models import FileAsset, FileFolder, FileShare
+from govoplan_files.backend.storage.share_state import effective_file_share_clause
+
+
+PROVIDER_ID = "files.objects"
+RESOURCE_MODELS = {
+    "file": FileAsset,
+    "folder": FileFolder,
+}
+READ_SCOPE = "files:file:read"
+ADMIN_SCOPE = "files:file:admin"
+
+
+class FilesSearchSource:
+    def resource_types(self) -> Sequence[SearchResourceType]:
+        return (
+            SearchResourceType(
+                provider_id=PROVIDER_ID,
+                module_id="files",
+                resource_type="file",
+                label="Files",
+                requires_authorization_recheck=True,
+            ),
+            SearchResourceType(
+                provider_id=PROVIDER_ID,
+                module_id="files",
+                resource_type="folder",
+                label="File folders",
+                requires_authorization_recheck=True,
+            ),
+        )
+
+    def backfill(
+        self,
+        session: object,
+        *,
+        request: SearchBackfillRequest,
+    ) -> SearchBackfillPage:
+        db = _session(session)
+        model = _model(request.provider_id, request.resource_type)
+        statement = select(model).where(
+            model.tenant_id == request.tenant_id,
+            model.deleted_at.is_(None),
+        )
+        if request.cursor:
+            statement = statement.where(model.id > request.cursor)
+        rows = list(
+            db.scalars(
+                statement.order_by(model.id).limit(request.limit + 1)
+            )
+        )
+        has_more = len(rows) > request.limit
+        selected = rows[: request.limit]
+        shares = (
+            _shares_by_asset(db, selected)
+            if request.resource_type == "file"
+            else {}
+        )
+        high_watermark = db.scalar(
+            select(func.max(model.updated_at)).where(
+                model.tenant_id == request.tenant_id,
+                model.deleted_at.is_(None),
+            )
+        )
+        return SearchBackfillPage(
+            documents=tuple(
+                _document(
+                    row,
+                    resource_type=request.resource_type,
+                    shares=shares.get(row.id, ()),
+                )
+                for row in selected
+            ),
+            next_cursor=selected[-1].id if has_more and selected else None,
+            complete=not has_more,
+            high_watermark=(
+                high_watermark.isoformat()
+                if high_watermark is not None
+                else None
+            ),
+        )
+
+    def authorize(
+        self,
+        session: object,
+        principal: object,
+        *,
+        requests: Sequence[SearchAuthorizationRequest],
+    ) -> Mapping[str, bool]:
+        decisions = {item.reference.key: False for item in requests}
+        if not isinstance(principal, ApiPrincipal) or not (
+            principal.has(READ_SCOPE) or principal.has(ADMIN_SCOPE)
+        ):
+            return decisions
+        db = _session(session)
+        for request in requests:
+            reference = request.reference
+            if (
+                reference.tenant_id != principal.tenant_id
+                or reference.module_id != "files"
+                or reference.resource_type not in RESOURCE_MODELS
+            ):
+                continue
+            decisions[reference.key] = _can_read(
+                db,
+                principal,
+                reference=reference,
+            )
+        return decisions
+
+    def index_changes_for_event(
+        self,
+        session: object,
+        *,
+        event: PlatformEvent,
+        delivery_key: str,
+    ) -> Sequence[SearchIndexChange]:
+        if (
+            event.module_id != "files"
+            or event.tenant is None
+            or event.resource is None
+            or event.resource.id is None
+            or event.resource.type not in RESOURCE_MODELS
+        ):
+            return ()
+        db = _session(session)
+        reference = SearchResourceReference(
+            tenant_id=event.tenant.id,
+            module_id="files",
+            resource_type=event.resource.type,
+            resource_id=event.resource.id,
+        )
+        model = RESOURCE_MODELS[event.resource.type]
+        row = db.get(model, event.resource.id)
+        deleted = row is None or row.tenant_id != event.tenant.id or row.deleted_at is not None
+        cursor = event.event_id
+        document = None
+        if not deleted:
+            shares = (
+                tuple(_active_shares(db, row.id))
+                if event.resource.type == "file"
+                else ()
+            )
+            document = _document(
+                row,
+                resource_type=event.resource.type,
+                shares=shares,
+                change_cursor=cursor,
+            )
+        return (
+            SearchIndexChange(
+                change_id=f"{delivery_key}:{PROVIDER_ID}:{event.resource.type}",
+                provider_id=PROVIDER_ID,
+                kind="delete" if deleted else "upsert",
+                reference=reference,
+                source_revision=(
+                    document.source_revision if document is not None else cursor
+                ),
+                cursor=cursor,
+                document=document,
+                occurred_at=event.occurred_at,
+            ),
+        )
+
+
+def create_files_search_source(_context: ModuleContext) -> FilesSearchSource:
+    return FilesSearchSource()
+
+
+def _model(provider_id: str, resource_type: str):
+    if provider_id != PROVIDER_ID or resource_type not in RESOURCE_MODELS:
+        raise ValueError("Unsupported Files search source.")
+    return RESOURCE_MODELS[resource_type]
+
+
+def _document(
+    row: FileAsset | FileFolder,
+    *,
+    resource_type: str,
+    shares: Sequence[FileShare] = (),
+    change_cursor: str | None = None,
+) -> SearchDocument:
+    is_file = isinstance(row, FileAsset)
+    title = row.filename if is_file else (row.path.rsplit("/", 1)[-1] or row.path)
+    path = row.display_path if is_file else row.path
+    owner_id = row.owner_user_id if row.owner_type == "user" else row.owner_group_id
+    tokens = [f"scope:{READ_SCOPE}", f"scope:{ADMIN_SCOPE}"]
+    if owner_id:
+        tokens.append(
+            f"membership:{owner_id}"
+            if row.owner_type == "user"
+            else f"group:{owner_id}"
+        )
+    for share in shares:
+        prefix = "membership" if share.target_type == "user" else share.target_type
+        if prefix in {"membership", "group", "tenant"}:
+            tokens.append(f"{prefix}:{share.target_id}")
+    updated_at = row.updated_at or row.created_at
+    revision = (
+        f"{row.current_version_id or 'none'}:{updated_at.isoformat()}"
+        if is_file
+        else updated_at.isoformat()
+    )
+    return SearchDocument(
+        tenant_id=row.tenant_id,
+        module_id="files",
+        provider_id=PROVIDER_ID,
+        resource_type=resource_type,
+        resource_id=row.id,
+        title=title,
+        url=f"/files?{resource_type}Id={quote(row.id, safe='')}",
+        summary=((row.description or "") if is_file else path)[:4000] or None,
+        body=" ".join(
+            value for value in (path, row.description if is_file else None) if value
+        )[:200_000],
+        keywords=(path[:200], row.owner_type[:200]),
+        visibility="restricted",
+        acl_tokens=tuple(dict.fromkeys(tokens)),
+        metadata={
+            "path": path,
+            "owner_type": row.owner_type,
+            "current_version_id": row.current_version_id if is_file else None,
+        },
+        source_revision=revision,
+        change_cursor=change_cursor,
+        source_updated_at=updated_at,
+        requires_authorization_recheck=True,
+    )
+
+
+def _can_read(
+    session: Session,
+    principal: ApiPrincipal,
+    *,
+    reference: SearchResourceReference,
+) -> bool:
+    model = RESOURCE_MODELS[reference.resource_type]
+    row = session.get(model, reference.resource_id)
+    if row is None or row.tenant_id != principal.tenant_id or row.deleted_at is not None:
+        return False
+    if principal.has(ADMIN_SCOPE):
+        return True
+    user_id = str(getattr(principal.user, "id", "") or principal.membership_id or "")
+    if row.owner_type == "user" and row.owner_user_id == user_id:
+        return True
+    if row.owner_type == "group" and row.owner_group_id in principal.group_ids:
+        return True
+    if reference.resource_type != "file":
+        return False
+    target_clauses = [
+        (FileShare.target_type == "user") & (FileShare.target_id == user_id),
+        (FileShare.target_type == "tenant")
+        & (FileShare.target_id == principal.tenant_id),
+    ]
+    if principal.group_ids:
+        target_clauses.append(
+            (FileShare.target_type == "group")
+            & (FileShare.target_id.in_(tuple(principal.group_ids)))
+        )
+    return session.scalar(
+        select(FileShare.id).where(
+            FileShare.tenant_id == principal.tenant_id,
+            FileShare.file_asset_id == row.id,
+            effective_file_share_clause(),
+            or_(*target_clauses),
+        ).limit(1)
+    ) is not None
+
+
+def _active_shares(session: Session, asset_id: str) -> Sequence[FileShare]:
+    return tuple(
+        session.scalars(
+            select(FileShare).where(
+                FileShare.file_asset_id == asset_id,
+                effective_file_share_clause(),
+            )
+        )
+    )
+
+
+def _shares_by_asset(
+    session: Session,
+    rows: Sequence[FileAsset | FileFolder],
+) -> dict[str, tuple[FileShare, ...]]:
+    asset_ids = [row.id for row in rows if isinstance(row, FileAsset)]
+    grouped: dict[str, list[FileShare]] = {asset_id: [] for asset_id in asset_ids}
+    if not asset_ids:
+        return {}
+    for share in session.scalars(
+        select(FileShare).where(
+            FileShare.file_asset_id.in_(asset_ids),
+            effective_file_share_clause(),
+        )
+    ):
+        grouped.setdefault(share.file_asset_id, []).append(share)
+    return {key: tuple(value) for key, value in grouped.items()}
+
+
+def _session(value: object) -> Session:
+    if not isinstance(value, Session):
+        raise TypeError("Files search requires a SQLAlchemy session.")
+    return value
+
+
+__all__ = [
+    "FilesSearchSource",
+    "PROVIDER_ID",
+    "create_files_search_source",
+]

src/govoplan_files/backend/services/__init__.py

@@ -0,0 +1 @@
+"""Query and response assembly services used by Files routes."""

src/govoplan_files/backend/services/connector_settings_delta.py

@@ -0,0 +1,292 @@
+from __future__ import annotations
+
+from typing import Literal
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal
+from govoplan_core.api.v1.schemas import DeltaDeletedItem
+from govoplan_core.core.change_sequence import (
+    ChangeSequenceEntry,
+)
+from govoplan_files.backend.change_tracking import (
+    FILES_CONNECTOR_CREDENTIALS_COLLECTION,
+    FILES_CONNECTOR_POLICIES_COLLECTION,
+    FILES_CONNECTOR_PROFILES_COLLECTION,
+    FILES_CONNECTOR_SPACES_COLLECTION,
+)
+from govoplan_files.backend.schemas import (
+    FileConnectorCredentialResponse,
+    FileConnectorSettingsDeltaResponse,
+    FileConnectorPolicyResponse,
+    FileConnectorProfileResponse,
+)
+from govoplan_files.backend.db.models import FileConnectorSpace
+from govoplan_files.backend.storage.connector_credential_store import (
+    ConnectorCredential,
+)
+from govoplan_files.backend.storage.connector_profiles import ConnectorProfile
+from govoplan_files.backend.storage.connector_policy_store import (
+    connector_policy_response,
+)
+
+
+from govoplan_files.backend.route_support import (
+    FILES_CONNECTOR_CREDENTIAL_RESOURCE,
+    FILES_CONNECTOR_PROFILE_RESOURCE,
+    FILES_CONNECTOR_SPACE_RESOURCE,
+    _can_read_disabled_connector_profiles,
+    _connector_deleted_item,
+    _connector_space_response,
+    _ensure_campaign_file_access,
+    _file_connector_settings_response_watermark,
+    _file_connector_settings_watermark,
+    _visible_connector_credentials,
+    _visible_connector_profiles,
+    _visible_connector_spaces,
+)
+
+
+def _full_file_connector_settings_delta_response(
+    session: Session,
+    principal: ApiPrincipal,
+    *,
+    scope_type: str,
+    scope_id: str | None,
+    provider: str | None,
+    campaign_id: str | None,
+    include_disabled: bool,
+    include_inactive: bool,
+    owner_type: Literal["user", "group"] | None,
+    owner_id: str | None,
+) -> FileConnectorSettingsDeltaResponse:
+    if campaign_id:
+        _ensure_campaign_file_access(session, principal, campaign_id)
+    profiles = _visible_connector_profiles(
+        session,
+        principal,
+        provider=provider,
+        campaign_id=campaign_id,
+        include_disabled=include_disabled
+        and _can_read_disabled_connector_profiles(principal),
+        include_admin_scopes=_can_read_disabled_connector_profiles(principal),
+        include_effective_policy=False,
+    )
+    credentials = _visible_connector_credentials(
+        session,
+        principal,
+        provider=provider,
+        include_disabled=include_disabled,
+    )
+    spaces = _visible_connector_spaces(
+        session,
+        principal,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        include_inactive=include_inactive,
+    )
+    return FileConnectorSettingsDeltaResponse(
+        profiles=[
+            FileConnectorProfileResponse(**profile.to_response())
+            for profile in profiles
+        ],
+        credentials=[
+            FileConnectorCredentialResponse(**credential.to_response())
+            for credential in credentials
+        ],
+        spaces=[_connector_space_response(space) for space in spaces],
+        policy=FileConnectorPolicyResponse(
+            **connector_policy_response(
+                session,
+                tenant_id=principal.tenant_id,
+                scope_type=scope_type,
+                scope_id=scope_id,
+            )
+        ),
+        changed_sections=["profiles", "credentials", "spaces", "policy"],
+        deleted=[],
+        watermark=_file_connector_settings_watermark(
+            session, tenant_id=principal.tenant_id
+        ),
+        has_more=False,
+        full=True,
+    )
+
+
+def _changed_file_connector_setting_ids(
+    entries: list[ChangeSequenceEntry],
+) -> tuple[set[str], set[str], set[str], bool]:
+    changed_profile_ids = {
+        entry.resource_id
+        for entry in entries
+        if entry.collection == FILES_CONNECTOR_PROFILES_COLLECTION
+        and entry.resource_type == FILES_CONNECTOR_PROFILE_RESOURCE
+    }
+    changed_credential_ids = {
+        entry.resource_id
+        for entry in entries
+        if entry.collection == FILES_CONNECTOR_CREDENTIALS_COLLECTION
+        and entry.resource_type == FILES_CONNECTOR_CREDENTIAL_RESOURCE
+    }
+    changed_space_ids = {
+        entry.resource_id
+        for entry in entries
+        if entry.collection == FILES_CONNECTOR_SPACES_COLLECTION
+        and entry.resource_type == FILES_CONNECTOR_SPACE_RESOURCE
+    }
+    policy_changed = any(
+        entry.collection == FILES_CONNECTOR_POLICIES_COLLECTION for entry in entries
+    )
+    return (
+        changed_profile_ids,
+        changed_credential_ids,
+        changed_space_ids,
+        policy_changed,
+    )
+
+
+def _file_connector_settings_changed_sections(
+    *,
+    changed_profile_ids: set[str],
+    changed_credential_ids: set[str],
+    changed_space_ids: set[str],
+    policy_changed: bool,
+    profiles: list[ConnectorProfile],
+) -> list[str]:
+    changed_sections = []
+    if changed_profile_ids or any(
+        profile.credential_profile_id
+        and profile.credential_profile_id in changed_credential_ids
+        for profile in profiles
+    ):
+        changed_sections.append("profiles")
+    if changed_credential_ids:
+        changed_sections.append("credentials")
+    if changed_space_ids:
+        changed_sections.append("spaces")
+    if policy_changed:
+        changed_sections.append("policy")
+    return changed_sections
+
+
+def _file_connector_settings_deleted_items(
+    entries: list[ChangeSequenceEntry],
+    *,
+    visible_profiles: dict[str, ConnectorProfile],
+    visible_credentials: dict[str, ConnectorCredential],
+    visible_spaces: dict[str, FileConnectorSpace],
+) -> list[DeltaDeletedItem]:
+    return [
+        _connector_deleted_item(entry)
+        for entry in entries
+        if (
+            entry.resource_type == FILES_CONNECTOR_PROFILE_RESOURCE
+            and entry.resource_id not in visible_profiles
+        )
+        or (
+            entry.resource_type == FILES_CONNECTOR_CREDENTIAL_RESOURCE
+            and entry.resource_id not in visible_credentials
+        )
+        or (
+            entry.resource_type == FILES_CONNECTOR_SPACE_RESOURCE
+            and entry.resource_id not in visible_spaces
+        )
+    ]
+
+
+def _incremental_file_connector_settings_delta_response(
+    session: Session,
+    principal: ApiPrincipal,
+    *,
+    entries: list[ChangeSequenceEntry],
+    has_more: bool,
+    scope_type: str,
+    scope_id: str | None,
+    provider: str | None,
+    campaign_id: str | None,
+    include_disabled: bool,
+    include_inactive: bool,
+    owner_type: Literal["user", "group"] | None,
+    owner_id: str | None,
+) -> FileConnectorSettingsDeltaResponse:
+    changed_profile_ids, changed_credential_ids, changed_space_ids, policy_changed = (
+        _changed_file_connector_setting_ids(entries)
+    )
+    profiles = _visible_connector_profiles(
+        session,
+        principal,
+        provider=provider,
+        campaign_id=campaign_id,
+        include_disabled=include_disabled
+        and _can_read_disabled_connector_profiles(principal),
+        include_admin_scopes=_can_read_disabled_connector_profiles(principal),
+        include_effective_policy=False,
+    )
+    visible_profiles = {
+        profile.id: profile
+        for profile in profiles
+        if profile.id in changed_profile_ids
+        or (
+            profile.credential_profile_id
+            and profile.credential_profile_id in changed_credential_ids
+        )
+    }
+    credentials = _visible_connector_credentials(
+        session,
+        principal,
+        provider=provider,
+        include_disabled=include_disabled,
+    )
+    visible_credentials = {
+        credential.id: credential
+        for credential in credentials
+        if credential.id in changed_credential_ids
+    }
+    spaces = _visible_connector_spaces(
+        session,
+        principal,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        include_inactive=include_inactive,
+    )
+    visible_spaces = {
+        space.id: space for space in spaces if space.id in changed_space_ids
+    }
+    return FileConnectorSettingsDeltaResponse(
+        profiles=[
+            FileConnectorProfileResponse(**profile.to_response())
+            for profile in visible_profiles.values()
+        ],
+        credentials=[
+            FileConnectorCredentialResponse(**credential.to_response())
+            for credential in visible_credentials.values()
+        ],
+        spaces=[_connector_space_response(space) for space in visible_spaces.values()],
+        policy=FileConnectorPolicyResponse(
+            **connector_policy_response(
+                session,
+                tenant_id=principal.tenant_id,
+                scope_type=scope_type,
+                scope_id=scope_id,
+            )
+        )
+        if policy_changed
+        else None,
+        changed_sections=_file_connector_settings_changed_sections(
+            changed_profile_ids=changed_profile_ids,
+            changed_credential_ids=changed_credential_ids,
+            changed_space_ids=changed_space_ids,
+            policy_changed=policy_changed,
+            profiles=profiles,
+        ),
+        deleted=_file_connector_settings_deleted_items(
+            entries,
+            visible_profiles=visible_profiles,
+            visible_credentials=visible_credentials,
+            visible_spaces=visible_spaces,
+        ),
+        watermark=_file_connector_settings_response_watermark(
+            session, tenant_id=principal.tenant_id, entries=entries, has_more=has_more
+        ),
+        has_more=has_more,
+        full=False,
+    )

src/govoplan_files/backend/services/list_queries.py

@@ -0,0 +1,620 @@
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Literal
+from fastapi import HTTPException, status
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal
+from govoplan_core.api.v1.schemas import DeltaDeletedItem
+from govoplan_core.core.change_sequence import (
+    ChangeSequenceEntry,
+    decode_sequence_watermark,
+    encode_sequence_watermark,
+    max_sequence_id,
+    sequence_entries_since,
+    sequence_watermark_is_expired,
+)
+from govoplan_core.core.pagination import (
+    KeysetCursorError,
+    decode_keyset_cursor,
+    encode_keyset_cursor,
+    keyset_query_fingerprint,
+)
+from govoplan_files.backend.change_tracking import (
+    FILES_ASSETS_COLLECTION,
+    FILES_FOLDERS_COLLECTION,
+    FILES_MODULE_ID,
+)
+from govoplan_files.backend.schemas import (
+    FileDeltaResponse,
+)
+from govoplan_files.backend.db.models import FileAsset, FileFolder, FileShare
+from govoplan_files.backend.storage.access import user_group_ids
+from govoplan_files.backend.storage.files import (
+    list_assets_for_user,
+)
+from govoplan_files.backend.storage.folders import list_folders_for_user
+from govoplan_files.backend.storage.share_state import effective_file_share_clause
+
+
+from govoplan_files.backend.route_support import (
+    _asset_list_response,
+    _folder_response,
+    _is_admin,
+)
+
+_FILES_DELTA_COLLECTIONS = (FILES_ASSETS_COLLECTION, FILES_FOLDERS_COLLECTION)
+FILES_LIST_CURSOR_SCOPE = "files.list.v1"
+FOLDERS_LIST_CURSOR_SCOPE = "files.folders.list.v1"
+DEFAULT_FILE_LIST_PAGE_SIZE = 500
+
+
+def _cursor_http_error(exc: Exception) -> HTTPException:
+    return HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc))
+
+
+def _cursor_page_size(
+    scope: str, cursor: str | None, explicit_page_size: int | None
+) -> int | None:
+    if explicit_page_size is not None:
+        return explicit_page_size
+    if not cursor:
+        return DEFAULT_FILE_LIST_PAGE_SIZE
+    try:
+        values = decode_keyset_cursor(scope, cursor)
+    except KeysetCursorError as exc:
+        raise _cursor_http_error(exc) from exc
+    raw_page_size = values.get("page_size")
+    if not isinstance(raw_page_size, int) or raw_page_size < 1 or raw_page_size > 1000:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST, detail="Invalid pagination cursor"
+        )
+    return raw_page_size
+
+
+def _files_list_fingerprint(
+    principal: ApiPrincipal,
+    *,
+    owner_type: Literal["user", "group"] | None,
+    owner_id: str | None,
+    campaign_id: str | None,
+    path_prefix: str | None,
+    campaign_usage: Literal["linked", "unlinked"] | None,
+    audit_relevant: bool | None,
+    page_size: int,
+) -> str:
+    return keyset_query_fingerprint(
+        FILES_LIST_CURSOR_SCOPE,
+        {
+            "tenant_id": principal.tenant_id,
+            "actor": "admin" if _is_admin(principal) else principal.user.id,
+            "owner_type": owner_type,
+            "owner_id": owner_id,
+            "campaign_id": campaign_id,
+            "path_prefix": path_prefix or "",
+            "campaign_usage": campaign_usage or "",
+            "audit_relevant": audit_relevant,
+            "sort": "display_path.asc,updated_at.desc,id.asc",
+            "page_size": page_size,
+        },
+    )
+
+
+def _folders_list_fingerprint(
+    principal: ApiPrincipal,
+    *,
+    owner_type: Literal["user", "group"],
+    owner_id: str,
+    page_size: int,
+) -> str:
+    return keyset_query_fingerprint(
+        FOLDERS_LIST_CURSOR_SCOPE,
+        {
+            "tenant_id": principal.tenant_id,
+            "actor": "admin" if _is_admin(principal) else principal.user.id,
+            "owner_type": owner_type,
+            "owner_id": owner_id,
+            "sort": "path.asc,id.asc",
+            "page_size": page_size,
+        },
+    )
+
+
+def _file_cursor_values(
+    cursor: str | None, *, fingerprint: str
+) -> tuple[str | None, datetime | None, str | None]:
+    try:
+        values = decode_keyset_cursor(
+            FILES_LIST_CURSOR_SCOPE, cursor, fingerprint=fingerprint
+        )
+    except KeysetCursorError as exc:
+        raise _cursor_http_error(exc) from exc
+    if values is None:
+        return None, None, None
+    display_path = values.get("display_path")
+    updated_at = values.get("updated_at")
+    asset_id = values.get("id")
+    if (
+        not isinstance(display_path, str)
+        or not isinstance(updated_at, str)
+        or not isinstance(asset_id, str)
+    ):
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST, detail="Invalid pagination cursor"
+        )
+    try:
+        parsed_updated_at = datetime.fromisoformat(updated_at)
+    except ValueError as exc:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST, detail="Invalid pagination cursor"
+        ) from exc
+    return display_path, parsed_updated_at, asset_id
+
+
+def _folder_cursor_values(
+    cursor: str | None, *, fingerprint: str
+) -> tuple[str | None, str | None]:
+    try:
+        values = decode_keyset_cursor(
+            FOLDERS_LIST_CURSOR_SCOPE, cursor, fingerprint=fingerprint
+        )
+    except KeysetCursorError as exc:
+        raise _cursor_http_error(exc) from exc
+    if values is None:
+        return None, None
+    folder_path = values.get("path")
+    folder_id = values.get("id")
+    if not isinstance(folder_path, str) or not isinstance(folder_id, str):
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST, detail="Invalid pagination cursor"
+        )
+    return folder_path, folder_id
+
+
+def _next_file_list_cursor(
+    principal: ApiPrincipal,
+    assets: list[FileAsset],
+    *,
+    owner_type: Literal["user", "group"] | None,
+    owner_id: str | None,
+    campaign_id: str | None,
+    path_prefix: str | None,
+    campaign_usage: Literal["linked", "unlinked"] | None,
+    audit_relevant: bool | None,
+    page_size: int,
+    has_more: bool,
+) -> str | None:
+    if not has_more or not assets:
+        return None
+    last = assets[-1]
+    return encode_keyset_cursor(
+        FILES_LIST_CURSOR_SCOPE,
+        fingerprint=_files_list_fingerprint(
+            principal,
+            owner_type=owner_type,
+            owner_id=owner_id,
+            campaign_id=campaign_id,
+            path_prefix=path_prefix,
+            campaign_usage=campaign_usage,
+            audit_relevant=audit_relevant,
+            page_size=page_size,
+        ),
+        values={
+            "display_path": last.display_path,
+            "updated_at": last.updated_at,
+            "id": last.id,
+            "page_size": page_size,
+        },
+    )
+
+
+def _next_folder_list_cursor(
+    principal: ApiPrincipal,
+    folders: list[FileFolder],
+    *,
+    owner_type: Literal["user", "group"],
+    owner_id: str,
+    page_size: int,
+    has_more: bool,
+) -> str | None:
+    if not has_more or not folders:
+        return None
+    last = folders[-1]
+    return encode_keyset_cursor(
+        FOLDERS_LIST_CURSOR_SCOPE,
+        fingerprint=_folders_list_fingerprint(
+            principal, owner_type=owner_type, owner_id=owner_id, page_size=page_size
+        ),
+        values={"path": last.path, "id": last.id, "page_size": page_size},
+    )
+
+
+def _files_delta_watermark(session: Session, tenant_id: str) -> str:
+    return encode_sequence_watermark(
+        max_sequence_id(
+            session,
+            tenant_id=tenant_id,
+            module_id=FILES_MODULE_ID,
+            collections=_FILES_DELTA_COLLECTIONS,
+        )
+    )
+
+
+def _full_file_delta_response(
+    session: Session,
+    *,
+    principal: ApiPrincipal,
+    owner_type: Literal["user", "group"] | None,
+    owner_id: str | None,
+    campaign_id: str | None,
+    path_prefix: str | None,
+) -> FileDeltaResponse:
+    assets = list_assets_for_user(
+        session,
+        tenant_id=principal.tenant_id,
+        user_id=principal.user.id,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        campaign_id=campaign_id,
+        path_prefix=path_prefix,
+        is_admin=_is_admin(principal),
+    )
+    folders = _visible_folders_for_delta(
+        session,
+        principal=principal,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        path_prefix=path_prefix,
+    )
+    return FileDeltaResponse(
+        files=_asset_list_response(session, assets, include_shares=True),
+        folders=[_folder_response(folder) for folder in folders],
+        deleted=[],
+        watermark=_files_delta_watermark(session, principal.tenant_id),
+        has_more=False,
+        full=True,
+    )
+
+
+def _visible_folders_for_delta(
+    session: Session,
+    *,
+    principal: ApiPrincipal,
+    owner_type: Literal["user", "group"] | None,
+    owner_id: str | None,
+    path_prefix: str | None,
+) -> list[FileFolder]:
+    if not owner_type or not owner_id:
+        return []
+    folders = list_folders_for_user(
+        session,
+        tenant_id=principal.tenant_id,
+        user_id=principal.user.id,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        is_admin=_is_admin(principal),
+    )
+    if not path_prefix:
+        return folders
+    normalized = path_prefix.strip().strip("/")
+    if not normalized:
+        return folders
+    return [
+        folder
+        for folder in folders
+        if folder.path == normalized or folder.path.startswith(f"{normalized}/")
+    ]
+
+
+def _entry_path_matches(
+    entry_payload: dict[str, object], path_prefix: str | None
+) -> bool:
+    if not path_prefix:
+        return True
+    normalized = path_prefix.strip().strip("/")
+    if not normalized:
+        return True
+    for key in ("path", "previous_path"):
+        value = entry_payload.get(key)
+        if isinstance(value, str) and (
+            value == normalized or value.startswith(f"{normalized}/")
+        ):
+            return True
+    return False
+
+
+def _entry_owner_matches(
+    entry_payload: dict[str, object],
+    owner_type: Literal["user", "group"] | None,
+    owner_id: str | None,
+) -> bool:
+    if not owner_type or not owner_id:
+        return True
+    return (
+        entry_payload.get("owner_type") == owner_type
+        and entry_payload.get("owner_id") == owner_id
+    )
+
+
+def _entry_campaign_matches(session: Session, entry, campaign_id: str | None) -> bool:
+    if not campaign_id:
+        return True
+    payload = entry.payload or {}
+    if (
+        payload.get("share_target_type") == "campaign"
+        and payload.get("share_target_id") == campaign_id
+    ):
+        return True
+    if entry.resource_type != "file":
+        return False
+    return (
+        session.query(FileShare)
+        .filter(
+            FileShare.tenant_id == entry.tenant_id,
+            FileShare.file_asset_id == entry.resource_id,
+            FileShare.target_type == "campaign",
+            FileShare.target_id == campaign_id,
+            effective_file_share_clause(),
+        )
+        .first()
+        is not None
+    )
+
+
+def _principal_group_ids_for_delta(
+    session: Session, principal: ApiPrincipal
+) -> set[str]:
+    cache = session.info.setdefault("files_delta_group_ids", {})
+    key = (principal.tenant_id, principal.user.id)
+    if key not in cache:
+        cache[key] = set(
+            user_group_ids(
+                session, tenant_id=principal.tenant_id, user_id=principal.user.id
+            )
+        )
+    return cache[key]
+
+
+def _entry_subject_matches_principal(
+    session: Session, principal: ApiPrincipal, entry_payload: dict[str, object]
+) -> bool:
+    if _is_admin(principal):
+        return True
+    owner_type = entry_payload.get("owner_type")
+    owner_id = entry_payload.get("owner_id")
+    if owner_type == "user" and owner_id == principal.user.id:
+        return True
+    if owner_type == "group" and isinstance(owner_id, str):
+        if owner_id in _principal_group_ids_for_delta(session, principal):
+            return True
+    share_target_type = entry_payload.get("share_target_type")
+    share_target_id = entry_payload.get("share_target_id")
+    if share_target_type == "user" and share_target_id == principal.user.id:
+        return True
+    if share_target_type == "tenant" and share_target_id == principal.tenant_id:
+        return True
+    if share_target_type == "group" and isinstance(share_target_id, str):
+        if share_target_id in _principal_group_ids_for_delta(session, principal):
+            return True
+    return False
+
+
+def _entry_matches_delta_scope(
+    session: Session,
+    principal: ApiPrincipal,
+    entry,
+    *,
+    owner_type: Literal["user", "group"] | None,
+    owner_id: str | None,
+    campaign_id: str | None,
+    path_prefix: str | None,
+) -> bool:
+    payload = entry.payload or {}
+    if (
+        not owner_type
+        and not campaign_id
+        and not _entry_subject_matches_principal(session, principal, payload)
+    ):
+        return False
+    return (
+        _entry_owner_matches(payload, owner_type, owner_id)
+        and _entry_path_matches(payload, path_prefix)
+        and _entry_campaign_matches(session, entry, campaign_id)
+    )
+
+
+def _decode_files_delta_watermark(since: str) -> int:
+    try:
+        return decode_sequence_watermark(since)
+    except ValueError as exc:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc)
+        ) from exc
+
+
+def _changed_delta_resource_ids(
+    entries: list[ChangeSequenceEntry],
+) -> tuple[list[str], list[str]]:
+    file_ids = list(
+        dict.fromkeys(
+            entry.resource_id for entry in entries if entry.resource_type == "file"
+        )
+    )
+    folder_ids = list(
+        dict.fromkeys(
+            entry.resource_id for entry in entries if entry.resource_type == "folder"
+        )
+    )
+    return file_ids, folder_ids
+
+
+def _visible_assets_for_delta(
+    session: Session,
+    *,
+    principal: ApiPrincipal,
+    owner_type: Literal["user", "group"] | None,
+    owner_id: str | None,
+    campaign_id: str | None,
+    path_prefix: str | None,
+    changed_file_ids: list[str],
+) -> dict[str, FileAsset]:
+    return {
+        asset.id: asset
+        for asset in list_assets_for_user(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.user.id,
+            owner_type=owner_type,
+            owner_id=owner_id,
+            campaign_id=campaign_id,
+            path_prefix=path_prefix,
+            is_admin=_is_admin(principal),
+        )
+        if asset.id in changed_file_ids
+    }
+
+
+def _changed_visible_folders_for_delta(
+    session: Session,
+    *,
+    principal: ApiPrincipal,
+    owner_type: Literal["user", "group"] | None,
+    owner_id: str | None,
+    path_prefix: str | None,
+    changed_folder_ids: list[str],
+) -> dict[str, FileFolder]:
+    return {
+        folder.id: folder
+        for folder in _visible_folders_for_delta(
+            session,
+            principal=principal,
+            owner_type=owner_type,
+            owner_id=owner_id,
+            path_prefix=path_prefix,
+        )
+        if folder.id in changed_folder_ids
+    }
+
+
+def _deleted_delta_items(
+    session: Session,
+    *,
+    principal: ApiPrincipal,
+    entries: list[ChangeSequenceEntry],
+    visible_assets: dict[str, FileAsset],
+    visible_folders: dict[str, FileFolder],
+    owner_type: Literal["user", "group"] | None,
+    owner_id: str | None,
+    campaign_id: str | None,
+    path_prefix: str | None,
+) -> list[DeltaDeletedItem]:
+    deleted: dict[tuple[str, str], DeltaDeletedItem] = {}
+    for entry in entries:
+        if entry.resource_type == "file" and entry.resource_id in visible_assets:
+            continue
+        if entry.resource_type == "folder" and entry.resource_id in visible_folders:
+            continue
+        if not _entry_matches_delta_scope(
+            session,
+            principal,
+            entry,
+            owner_type=owner_type,
+            owner_id=owner_id,
+            campaign_id=campaign_id,
+            path_prefix=path_prefix,
+        ):
+            continue
+        deleted[(entry.resource_type, entry.resource_id)] = DeltaDeletedItem(
+            id=entry.resource_id,
+            resource_type=entry.resource_type,
+            revision=encode_sequence_watermark(entry.id),
+            deleted_at=entry.created_at if entry.operation == "deleted" else None,
+        )
+    return list(deleted.values())
+
+
+def _files_delta_response(
+    session: Session,
+    *,
+    principal: ApiPrincipal,
+    owner_type: Literal["user", "group"] | None,
+    owner_id: str | None,
+    campaign_id: str | None,
+    path_prefix: str | None,
+    since: str,
+    limit: int,
+) -> FileDeltaResponse:
+    since_sequence = _decode_files_delta_watermark(since)
+    if sequence_watermark_is_expired(
+        session,
+        since=since_sequence,
+        tenant_id=principal.tenant_id,
+        module_id=FILES_MODULE_ID,
+        collections=_FILES_DELTA_COLLECTIONS,
+    ):
+        return _full_file_delta_response(
+            session,
+            principal=principal,
+            owner_type=owner_type,
+            owner_id=owner_id,
+            campaign_id=campaign_id,
+            path_prefix=path_prefix,
+        )
+
+    entries_plus_one = sequence_entries_since(
+        session,
+        since=since_sequence,
+        tenant_id=principal.tenant_id,
+        module_id=FILES_MODULE_ID,
+        collections=_FILES_DELTA_COLLECTIONS,
+        limit=limit + 1,
+    )
+    has_more = len(entries_plus_one) > limit
+    entries = entries_plus_one[:limit]
+
+    changed_file_ids, changed_folder_ids = _changed_delta_resource_ids(entries)
+    visible_assets = _visible_assets_for_delta(
+        session,
+        principal=principal,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        campaign_id=campaign_id,
+        path_prefix=path_prefix,
+        changed_file_ids=changed_file_ids,
+    )
+    visible_folders = _changed_visible_folders_for_delta(
+        session,
+        principal=principal,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        path_prefix=path_prefix,
+        changed_folder_ids=changed_folder_ids,
+    )
+    deleted = _deleted_delta_items(
+        session,
+        principal=principal,
+        entries=entries,
+        visible_assets=visible_assets,
+        visible_folders=visible_folders,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        campaign_id=campaign_id,
+        path_prefix=path_prefix,
+    )
+
+    watermark = (
+        encode_sequence_watermark(entries[-1].id)
+        if has_more and entries
+        else _files_delta_watermark(session, principal.tenant_id)
+    )
+    return FileDeltaResponse(
+        files=_asset_list_response(
+            session, list(visible_assets.values()), include_shares=True
+        ),
+        folders=[_folder_response(folder) for folder in visible_folders.values()],
+        deleted=deleted,
+        watermark=watermark,
+        has_more=has_more,
+        full=False,
+    )

src/govoplan_files/backend/storage/access.py

@@ -2,33 +2,50 @@ from __future__ import annotations
 
 from sqlalchemy.orm import Session
 
-from govoplan_core.db.models import Group, UserGroupMembership
+from govoplan_core.core.access import (
+    CAPABILITY_ACCESS_DIRECTORY,
+    AccessDirectory,
+    GroupRef,
+)
+from govoplan_core.core.runtime import get_registry
 from govoplan_files.backend.storage.common import FileStorageError
 
 
+def _access_directory() -> AccessDirectory:
+    registry = get_registry()
+    if registry is None or not hasattr(registry, "has_capability") or not registry.has_capability(CAPABILITY_ACCESS_DIRECTORY):
+        raise FileStorageError("Access directory capability is not configured")
+    capability = registry.require_capability(CAPABILITY_ACCESS_DIRECTORY)
+    if not isinstance(capability, AccessDirectory):
+        raise FileStorageError("Access directory capability is invalid")
+    return capability
+
+
+def group_refs_for_ids(*, tenant_id: str, group_ids: list[str]) -> list[GroupRef]:
+    if not group_ids:
+        return []
+    groups = _access_directory().get_groups(group_ids)
+    return sorted(
+        [group for group in groups.values() if group.tenant_id == tenant_id],
+        key=lambda group: group.name.casefold(),
+    )
+
+
 def user_group_ids(session: Session, *, tenant_id: str, user_id: str, include_admin_groups: bool = False) -> list[str]:
+    del session
+    directory = _access_directory()
     if include_admin_groups:
-        return [row.id for row in session.query(Group).filter(Group.tenant_id == tenant_id).order_by(Group.name.asc()).all()]
-    return [
-        row.group_id
-        for row in session.query(UserGroupMembership)
-        .filter(UserGroupMembership.tenant_id == tenant_id, UserGroupMembership.user_id == user_id)
-        .all()
-    ]
+        return [group.id for group in directory.groups_for_tenant(tenant_id)]
+    return [group.id for group in directory.groups_for_user(user_id, tenant_id=tenant_id)]
 
 
 def ensure_group_access(session: Session, *, tenant_id: str, group_id: str, user_id: str, is_admin: bool = False) -> None:
-    group = session.get(Group, group_id)
+    group = _access_directory().get_group(group_id)
     if not group or group.tenant_id != tenant_id:
         raise FileStorageError("Group not found")
     if is_admin:
         return
-    membership = (
-        session.query(UserGroupMembership)
-        .filter(UserGroupMembership.tenant_id == tenant_id, UserGroupMembership.user_id == user_id, UserGroupMembership.group_id == group_id)
-        .one_or_none()
-    )
-    if membership is None:
+    if group_id not in user_group_ids(session, tenant_id=tenant_id, user_id=user_id):
         raise FileStorageError("No access to this group file space")
 
 
@@ -42,3 +59,21 @@ def ensure_owner_access(session: Session, *, tenant_id: str, owner_type: str, ow
         ensure_group_access(session, tenant_id=tenant_id, group_id=owner_id, user_id=user_id, is_admin=is_admin)
         return
     raise FileStorageError("Files must be owned by a user or group")
+
+
+def ensure_share_target_exists(*, tenant_id: str, target_type: str, target_id: str) -> None:
+    target_type = target_type.lower().strip()
+    if target_type == "user":
+        user = _access_directory().get_user(target_id)
+        if not user or user.tenant_id != tenant_id or user.status != "active":
+            raise FileStorageError("User not found")
+        return
+    if target_type == "group":
+        group = _access_directory().get_group(target_id)
+        if not group or group.tenant_id != tenant_id or group.status != "active":
+            raise FileStorageError("Group not found")
+        return
+    if target_type == "tenant":
+        if target_id != tenant_id:
+            raise FileStorageError("Tenant not found")
+        return

src/govoplan_files/backend/storage/archives.py

@@ -1,53 +1,93 @@
 from __future__ import annotations
 
 import mimetypes
+import re
+import stat
+import tarfile
 import zipfile
+from dataclasses import dataclass
 from io import BytesIO
-from pathlib import Path
-from typing import Iterable
+from os import PathLike
+from pathlib import Path, PurePosixPath
+from typing import Any, BinaryIO, Iterable, Literal
 
+import pyzipper
 from sqlalchemy.orm import Session
 
 from govoplan_files.backend.db.models import FileAsset
-from govoplan_files.backend.storage.common import FileConflictResolution, FileStorageError, UploadedStoredFile
-from govoplan_files.backend.storage.backends import StorageBackendError, get_storage_backend
-from govoplan_files.backend.storage.files import create_file_asset, current_version_and_blob
-from govoplan_files.backend.storage.paths import filename_from_path, normalize_folder, normalize_logical_path
+from govoplan_files.backend.storage.backends import (
+    StorageBackendError,
+    get_storage_backend,
+)
+from govoplan_files.backend.storage.common import (
+    FileConflictResolution,
+    FileStorageError,
+    UploadedStoredFile,
+)
+from govoplan_files.backend.storage.files import (
+    create_file_asset,
+    current_versions_and_blobs,
+)
+from govoplan_files.backend.storage.paths import (
+    filename_from_path,
+    normalize_folder,
+    normalize_logical_path,
+)
 
 
-_ZIP_READ_CHUNK_SIZE = 1024 * 1024
+_ARCHIVE_READ_CHUNK_SIZE = 1024 * 1024
+_WINDOWS_DRIVE_RE = re.compile(r"^[A-Za-z]:")
+ARCHIVE_UPLOAD_MAX_ENTRIES = 10_000
+# Kept for callers and documentation using the former ZIP-specific name.
+ZIP_UPLOAD_MAX_FILES = ARCHIVE_UPLOAD_MAX_ENTRIES
+SUPPORTED_ARCHIVE_SUFFIXES = (
+    ".tar.bz2",
+    ".tar.gz",
+    ".tar.xz",
+    ".tbz2",
+    ".tgz",
+    ".txz",
+    ".tar",
+    ".zip",
+)
 
 
-def _read_zip_member(
-    archive: zipfile.ZipFile,
-    info: zipfile.ZipInfo,
-    *,
-    max_file_bytes: int,
-    max_total_bytes: int,
-    current_total: int,
-) -> tuple[bytes, int]:
-    parts: list[bytes] = []
-    actual_size = 0
-    with archive.open(info) as source:
-        while True:
-            read_size = min(_ZIP_READ_CHUNK_SIZE, max_file_bytes + 1 - actual_size)
-            chunk = source.read(read_size)
-            if not chunk:
-                break
-            actual_size += len(chunk)
-            if actual_size > max_file_bytes:
-                raise FileStorageError(f"ZIP member {info.filename!r} exceeds per-file limit")
-            if current_total + actual_size > max_total_bytes:
-                raise FileStorageError("ZIP is too large after extraction")
-            parts.append(chunk)
-    return b"".join(parts), current_total + actual_size
+class ArchivePasswordError(FileStorageError):
+    pass
 
 
-def create_zip_file(session: Session, assets: Iterable[FileAsset], output_path: str | Path) -> None:
+@dataclass(frozen=True, slots=True)
+class ArchiveEntry:
+    path: str
+    kind: Literal["file", "directory"]
+    size_bytes: int
+    compressed_size_bytes: int | None = None
+    encrypted: bool = False
+
+
+@dataclass(frozen=True, slots=True)
+class ArchiveInspection:
+    archive_format: str
+    entries: tuple[ArchiveEntry, ...]
+    file_count: int
+    directory_count: int
+    expanded_size_bytes: int
+    compressed_size_bytes: int
+    requires_password: bool
+    password_verified: bool
+
+
+def create_zip_file(
+    session: Session, assets: Iterable[FileAsset], output_path: str | Path
+) -> None:
     backend = get_storage_backend()
-    with zipfile.ZipFile(output_path, mode="w", compression=zipfile.ZIP_DEFLATED) as archive:
-        for asset in assets:
-            _version, blob = current_version_and_blob(session, asset)
+    asset_list = list(assets)
+    version_blobs = current_versions_and_blobs(session, asset_list)
+    with zipfile.ZipFile(
+        output_path, mode="w", compression=zipfile.ZIP_DEFLATED
+    ) as archive:
+        for asset in asset_list:
+            _version, blob = version_blobs[asset.id]
             info = zipfile.ZipInfo(asset.display_path)
             info.compress_type = zipfile.ZIP_DEFLATED
             with archive.open(info, "w") as member:
@@ -59,6 +99,147 @@ def create_zip_file(session: Session, assets: Iterable[FileAsset], output_path:
                     raise FileStorageError(str(exc)) from exc
 
 
+def archive_format_for_filename(filename: str) -> str:
+    lowered = filename.strip().casefold()
+    if lowered.endswith(".zip"):
+        return "zip"
+    if lowered.endswith((".tar.gz", ".tgz")):
+        return "tar.gz"
+    if lowered.endswith((".tar.bz2", ".tbz2")):
+        return "tar.bz2"
+    if lowered.endswith((".tar.xz", ".txz")):
+        return "tar.xz"
+    if lowered.endswith(".tar"):
+        return "tar"
+    raise FileStorageError(
+        "Unsupported archive format. Use ZIP, TAR, TAR.GZ, TAR.BZ2, or TAR.XZ."
+    )
+
+
+def is_supported_archive_filename(filename: str) -> bool:
+    try:
+        archive_format_for_filename(filename)
+    except FileStorageError:
+        return False
+    return True
+
+
+def inspect_archive(
+    archive_data: bytes | str | PathLike[str],
+    *,
+    filename: str,
+    password: str | None = None,
+    max_entries: int = ARCHIVE_UPLOAD_MAX_ENTRIES,
+    max_expanded_bytes: int = 2 * 1024 * 1024 * 1024,
+    max_expansion_ratio: int = 100,
+) -> ArchiveInspection:
+    archive_format = archive_format_for_filename(filename)
+    compressed_size = _archive_size(archive_data)
+    if archive_format == "zip":
+        entries, requires_password, password_verified = _inspect_zip(
+            archive_data,
+            password=password,
+        )
+    else:
+        entries = _inspect_tar(archive_data)
+        requires_password = False
+        password_verified = True
+    _validate_archive_limits(
+        entries,
+        compressed_size=compressed_size,
+        max_entries=max_entries,
+        max_expanded_bytes=max_expanded_bytes,
+        max_expansion_ratio=max_expansion_ratio,
+    )
+    complete_entries = _with_derived_directories(entries)
+    return ArchiveInspection(
+        archive_format=archive_format,
+        entries=tuple(complete_entries),
+        file_count=sum(entry.kind == "file" for entry in complete_entries),
+        directory_count=sum(
+            entry.kind == "directory" for entry in complete_entries
+        ),
+        expanded_size_bytes=sum(
+            entry.size_bytes for entry in entries if entry.kind == "file"
+        ),
+        compressed_size_bytes=compressed_size,
+        requires_password=requires_password,
+        password_verified=password_verified,
+    )
+
+
+def extract_archive_upload(
+    session: Session,
+    *,
+    tenant_id: str,
+    owner_type: str,
+    owner_id: str,
+    user_id: str,
+    archive_data: bytes | str | PathLike[str],
+    filename: str,
+    folder: str | None,
+    campaign_id: str | None,
+    selected_paths: Iterable[str] | None = None,
+    password: str | None = None,
+    conflict_strategy: str = "reject",
+    conflict_resolutions: Iterable[FileConflictResolution] | None = None,
+    metadata: dict[str, Any] | None = None,
+    is_admin: bool = False,
+    encryption_vault_id: str | None = None,
+    max_entries: int = ARCHIVE_UPLOAD_MAX_ENTRIES,
+    max_file_bytes: int = 50 * 1024 * 1024,
+    max_expanded_bytes: int = 2 * 1024 * 1024 * 1024,
+    max_expansion_ratio: int = 100,
+) -> list[UploadedStoredFile]:
+    inspection = inspect_archive(
+        archive_data,
+        filename=filename,
+        password=password,
+        max_entries=max_entries,
+        max_expanded_bytes=max_expanded_bytes,
+        max_expansion_ratio=max_expansion_ratio,
+    )
+    if inspection.requires_password and not inspection.password_verified:
+        raise ArchivePasswordError("Archive password is required")
+    selected_files = _selected_file_paths(inspection.entries, selected_paths)
+    if not selected_files:
+        raise FileStorageError("Select at least one archive file to import")
+    actual_total_limit = min(
+        max_expanded_bytes,
+        inspection.compressed_size_bytes * max_expansion_ratio,
+    )
+    if inspection.archive_format == "zip":
+        members = _read_selected_zip_members(
+            archive_data,
+            selected_files=selected_files,
+            password=password,
+            max_file_bytes=max_file_bytes,
+            max_total_bytes=actual_total_limit,
+        )
+    else:
+        members = _read_selected_tar_members(
+            archive_data,
+            selected_files=selected_files,
+            max_file_bytes=max_file_bytes,
+            max_total_bytes=actual_total_limit,
+        )
+    return _store_archive_members(
+        session,
+        members=members,
+        tenant_id=tenant_id,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        user_id=user_id,
+        folder=folder,
+        campaign_id=campaign_id,
+        conflict_strategy=conflict_strategy,
+        conflict_resolutions=conflict_resolutions,
+        metadata=metadata,
+        is_admin=is_admin,
+        encryption_vault_id=encryption_vault_id,
+    )
+
+
 def extract_zip_upload(
     session: Session,
     *,
@@ -66,59 +247,416 @@ def extract_zip_upload(
     owner_type: str,
     owner_id: str,
     user_id: str,
-    zip_data: bytes,
+    zip_data: bytes | str | PathLike[str],
     folder: str | None,
     campaign_id: str | None,
     conflict_strategy: str = "reject",
     conflict_resolutions: Iterable[FileConflictResolution] | None = None,
+    metadata: dict[str, Any] | None = None,
     is_admin: bool = False,
-    max_files: int = 1000,
+    encryption_vault_id: str | None = None,
+    max_files: int = ZIP_UPLOAD_MAX_FILES,
     max_file_bytes: int = 50 * 1024 * 1024,
     max_total_bytes: int = 250 * 1024 * 1024,
 ) -> list[UploadedStoredFile]:
-    uploaded: list[UploadedStoredFile] = []
-    total = 0
-    base_folder = normalize_folder(folder)
+    """Backward-compatible wrapper for the original immediate ZIP endpoint."""
+
+    return extract_archive_upload(
+        session,
+        tenant_id=tenant_id,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        user_id=user_id,
+        archive_data=zip_data,
+        filename="archive.zip",
+        folder=folder,
+        campaign_id=campaign_id,
+        conflict_strategy=conflict_strategy,
+        conflict_resolutions=conflict_resolutions,
+        metadata=metadata,
+        is_admin=is_admin,
+        encryption_vault_id=encryption_vault_id,
+        max_entries=max_files,
+        max_file_bytes=max_file_bytes,
+        max_expanded_bytes=max_total_bytes,
+    )
+
+
+def _inspect_zip(
+    archive_data: bytes | str | PathLike[str],
+    *,
+    password: str | None,
+) -> tuple[list[ArchiveEntry], bool, bool]:
     try:
-        with zipfile.ZipFile(BytesIO(zip_data)) as archive:
-            infos = [info for info in archive.infolist() if not info.is_dir()]
-            if len(infos) > max_files:
-                raise FileStorageError(f"ZIP contains too many files (limit {max_files})")
-            for info in infos:
-                if info.flag_bits & 0x1:
-                    raise FileStorageError("Encrypted ZIP uploads are not supported")
-                if info.file_size < 0:
-                    raise FileStorageError("Invalid ZIP member")
-                if info.file_size > max_file_bytes:
-                    raise FileStorageError(f"ZIP member {info.filename!r} exceeds per-file limit")
-                if total + info.file_size > max_total_bytes:
-                    raise FileStorageError("ZIP is too large after extraction")
-                inner_path = normalize_logical_path(info.filename)
-                target_path = f"{base_folder}/{inner_path}" if base_folder else inner_path
-                data, total = _read_zip_member(
-                    archive,
-                    info,
-                    max_file_bytes=max_file_bytes,
-                    max_total_bytes=max_total_bytes,
-                    current_total=total,
-                )
-                uploaded.append(
-                    create_file_asset(
-                        session,
-                        tenant_id=tenant_id,
-                        owner_type=owner_type,
-                        owner_id=owner_id,
-                        user_id=user_id,
-                        filename=filename_from_path(inner_path),
-                        data=data,
-                        display_path=target_path,
-                        content_type=mimetypes.guess_type(inner_path)[0] or "application/octet-stream",
-                        campaign_id=campaign_id,
-                        conflict_strategy=conflict_strategy,
-                        conflict_resolutions=conflict_resolutions,
-                        is_admin=is_admin,
+        with pyzipper.AESZipFile(_archive_source(archive_data)) as archive:
+            infos = archive.infolist()
+            entries = [_zip_entry(info) for info in infos]
+            encrypted_info = next(
+                (
+                    info
+                    for info in infos
+                    if not info.is_dir() and bool(info.flag_bits & 0x1)
+                ),
+                None,
+            )
+            if encrypted_info is None:
+                return entries, False, True
+            if not password:
+                return entries, True, False
+            try:
+                with archive.open(
+                    encrypted_info, pwd=password.encode("utf-8")
+                ) as member:
+                    member.read(1)
+            except (RuntimeError, ValueError, zipfile.BadZipFile) as exc:
+                raise ArchivePasswordError("Archive password is incorrect") from exc
+            return entries, True, True
+    except ArchivePasswordError:
+        raise
+    except (OSError, ValueError, zipfile.BadZipFile) as exc:
+        raise FileStorageError("Invalid ZIP upload") from exc
+
+
+def _inspect_tar(
+    archive_data: bytes | str | PathLike[str],
+) -> list[ArchiveEntry]:
+    try:
+        with _open_tar(archive_data) as archive:
+            entries: list[ArchiveEntry] = []
+            for member in archive.getmembers():
+                path = _safe_member_path(member.name)
+                if member.isdir():
+                    entries.append(
+                        ArchiveEntry(path=path, kind="directory", size_bytes=0)
+                    )
+                    continue
+                if not member.isfile():
+                    raise FileStorageError(
+                        f"Archive member {member.name!r} is not a regular file or directory"
+                    )
+                entries.append(
+                    ArchiveEntry(
+                        path=path,
+                        kind="file",
+                        size_bytes=max(0, int(member.size)),
                     )
                 )
-    except zipfile.BadZipFile as exc:
-        raise FileStorageError("Invalid ZIP upload") from exc
+            return entries
+    except FileStorageError:
+        raise
+    except (OSError, tarfile.TarError) as exc:
+        raise FileStorageError("Invalid TAR upload") from exc
+
+
+def _zip_entry(info: zipfile.ZipInfo) -> ArchiveEntry:
+    path = _safe_member_path(info.filename)
+    unix_mode = (info.external_attr >> 16) & 0xFFFF
+    file_type = stat.S_IFMT(unix_mode)
+    if file_type and not (
+        stat.S_ISREG(unix_mode) or stat.S_ISDIR(unix_mode)
+    ):
+        raise FileStorageError(
+            f"Archive member {info.filename!r} is not a regular file or directory"
+        )
+    if info.file_size < 0 or info.compress_size < 0:
+        raise FileStorageError(f"Archive member {info.filename!r} has invalid size metadata")
+    return ArchiveEntry(
+        path=path,
+        kind="directory" if info.is_dir() else "file",
+        size_bytes=0 if info.is_dir() else int(info.file_size),
+        compressed_size_bytes=(
+            None if info.is_dir() else int(info.compress_size)
+        ),
+        encrypted=bool(info.flag_bits & 0x1),
+    )
+
+
+def _validate_archive_limits(
+    entries: list[ArchiveEntry],
+    *,
+    compressed_size: int,
+    max_entries: int,
+    max_expanded_bytes: int,
+    max_expansion_ratio: int,
+) -> None:
+    if len(entries) > max_entries:
+        raise FileStorageError(
+            f"Archive contains too many entries (limit {max_entries})"
+        )
+    seen: dict[str, str] = {}
+    expanded_size = 0
+    for entry in entries:
+        previous_kind = seen.get(entry.path)
+        if previous_kind is not None:
+            raise FileStorageError(
+                f"Archive contains duplicate path {entry.path!r}"
+            )
+        seen[entry.path] = entry.kind
+        if entry.kind == "file":
+            expanded_size += entry.size_bytes
+            if expanded_size > max_expanded_bytes:
+                raise FileStorageError(
+                    "Archive is too large after extraction "
+                    f"(limit {max_expanded_bytes} bytes)"
+                )
+    if expanded_size and (
+        compressed_size <= 0
+        or expanded_size > compressed_size * max_expansion_ratio
+    ):
+        raise FileStorageError(
+            "Archive expansion ratio exceeds "
+            f"{max_expansion_ratio}:1"
+        )
+
+
+def _with_derived_directories(
+    entries: list[ArchiveEntry],
+) -> list[ArchiveEntry]:
+    by_path = {entry.path: entry for entry in entries}
+    for entry in entries:
+        parent = PurePosixPath(entry.path).parent
+        while str(parent) not in {"", "."}:
+            path = str(parent)
+            existing = by_path.get(path)
+            if existing and existing.kind != "directory":
+                raise FileStorageError(
+                    f"Archive path {path!r} is both a file and a directory"
+                )
+            by_path.setdefault(
+                path,
+                ArchiveEntry(path=path, kind="directory", size_bytes=0),
+            )
+            parent = parent.parent
+    return sorted(
+        by_path.values(),
+        key=lambda entry: (
+            tuple(entry.path.casefold().split("/")),
+            entry.kind != "directory",
+        ),
+    )
+
+
+def _selected_file_paths(
+    entries: tuple[ArchiveEntry, ...],
+    selected_paths: Iterable[str] | None,
+) -> set[str]:
+    file_paths = {entry.path for entry in entries if entry.kind == "file"}
+    if selected_paths is None:
+        return file_paths
+    known = {entry.path: entry for entry in entries}
+    normalized = {_safe_member_path(path) for path in selected_paths}
+    unknown = normalized - known.keys()
+    if unknown:
+        raise FileStorageError(
+            f"Archive selection contains unknown path {sorted(unknown)[0]!r}"
+        )
+    selected_files: set[str] = set()
+    for path in normalized:
+        entry = known[path]
+        if entry.kind == "file":
+            selected_files.add(path)
+            continue
+        prefix = f"{path}/"
+        selected_files.update(
+            file_path
+            for file_path in file_paths
+            if file_path.startswith(prefix)
+        )
+    return selected_files
+
+
+def _read_selected_zip_members(
+    archive_data: bytes | str | PathLike[str],
+    *,
+    selected_files: set[str],
+    password: str | None,
+    max_file_bytes: int,
+    max_total_bytes: int,
+) -> list[tuple[str, bytes]]:
+    result: list[tuple[str, bytes]] = []
+    total = 0
+    try:
+        with pyzipper.AESZipFile(_archive_source(archive_data)) as archive:
+            for info in archive.infolist():
+                if info.is_dir():
+                    continue
+                path = _safe_member_path(info.filename)
+                if path not in selected_files:
+                    continue
+                pwd = password.encode("utf-8") if password else None
+                try:
+                    with archive.open(info, pwd=pwd) as source:
+                        data, total = _read_member(
+                            source,
+                            path=path,
+                            max_file_bytes=max_file_bytes,
+                            max_total_bytes=max_total_bytes,
+                            current_total=total,
+                        )
+                except (RuntimeError, ValueError, zipfile.BadZipFile) as exc:
+                    if info.flag_bits & 0x1:
+                        raise ArchivePasswordError(
+                            "Archive password is incorrect"
+                        ) from exc
+                    raise
+                result.append((path, data))
+    except (FileStorageError, ArchivePasswordError):
+        raise
+    except (OSError, ValueError, zipfile.BadZipFile) as exc:
+        raise FileStorageError("ZIP extraction failed") from exc
+    return result
+
+
+def _read_selected_tar_members(
+    archive_data: bytes | str | PathLike[str],
+    *,
+    selected_files: set[str],
+    max_file_bytes: int,
+    max_total_bytes: int,
+) -> list[tuple[str, bytes]]:
+    result: list[tuple[str, bytes]] = []
+    total = 0
+    try:
+        with _open_tar(archive_data) as archive:
+            for member in archive.getmembers():
+                if not member.isfile():
+                    continue
+                path = _safe_member_path(member.name)
+                if path not in selected_files:
+                    continue
+                source = archive.extractfile(member)
+                if source is None:
+                    raise FileStorageError(
+                        f"Archive member {path!r} could not be read"
+                    )
+                with source:
+                    data, total = _read_member(
+                        source,
+                        path=path,
+                        max_file_bytes=max_file_bytes,
+                        max_total_bytes=max_total_bytes,
+                        current_total=total,
+                    )
+                result.append((path, data))
+    except FileStorageError:
+        raise
+    except (OSError, tarfile.TarError) as exc:
+        raise FileStorageError("TAR extraction failed") from exc
+    return result
+
+
+def _read_member(
+    source: BinaryIO,
+    *,
+    path: str,
+    max_file_bytes: int,
+    max_total_bytes: int,
+    current_total: int,
+) -> tuple[bytes, int]:
+    parts: list[bytes] = []
+    actual_size = 0
+    while True:
+        read_size = min(
+            _ARCHIVE_READ_CHUNK_SIZE,
+            max_file_bytes + 1 - actual_size,
+        )
+        chunk = source.read(read_size)
+        if not chunk:
+            break
+        actual_size += len(chunk)
+        if actual_size > max_file_bytes:
+            raise FileStorageError(
+                f"Archive member {path!r} exceeds per-file limit"
+            )
+        if current_total + actual_size > max_total_bytes:
+            raise FileStorageError("Archive is too large after extraction")
+        parts.append(chunk)
+    return b"".join(parts), current_total + actual_size
+
+
+def _store_archive_members(
+    session: Session,
+    *,
+    members: Iterable[tuple[str, bytes]],
+    tenant_id: str,
+    owner_type: str,
+    owner_id: str,
+    user_id: str,
+    folder: str | None,
+    campaign_id: str | None,
+    conflict_strategy: str,
+    conflict_resolutions: Iterable[FileConflictResolution] | None,
+    metadata: dict[str, Any] | None,
+    is_admin: bool,
+    encryption_vault_id: str | None,
+) -> list[UploadedStoredFile]:
+    uploaded: list[UploadedStoredFile] = []
+    base_folder = normalize_folder(folder)
+    for inner_path, data in members:
+        target_path = (
+            f"{base_folder}/{inner_path}" if base_folder else inner_path
+        )
+        uploaded.append(
+            create_file_asset(
+                session,
+                tenant_id=tenant_id,
+                owner_type=owner_type,
+                owner_id=owner_id,
+                user_id=user_id,
+                filename=filename_from_path(inner_path),
+                data=data,
+                display_path=target_path,
+                content_type=mimetypes.guess_type(inner_path)[0]
+                or "application/octet-stream",
+                metadata=metadata,
+                campaign_id=campaign_id,
+                conflict_strategy=conflict_strategy,
+                conflict_resolutions=conflict_resolutions,
+                is_admin=is_admin,
+                encryption_vault_id=encryption_vault_id,
+            )
+        )
     return uploaded
+
+
+def _safe_member_path(value: str) -> str:
+    raw = str(value or "").replace("\\", "/").strip()
+    if (
+        not raw
+        or "\x00" in raw
+        or raw.startswith("/")
+        or _WINDOWS_DRIVE_RE.match(raw)
+    ):
+        raise FileStorageError(f"Unsafe archive member path {value!r}")
+    if any(part == ".." for part in raw.split("/")):
+        raise FileStorageError(f"Unsafe archive member path {value!r}")
+    try:
+        return normalize_logical_path(raw.rstrip("/"))
+    except ValueError as exc:
+        raise FileStorageError(f"Unsafe archive member path {value!r}") from exc
+
+
+def _archive_size(archive_data: bytes | str | PathLike[str]) -> int:
+    if isinstance(archive_data, bytes):
+        return len(archive_data)
+    try:
+        return Path(archive_data).stat().st_size
+    except OSError as exc:
+        raise FileStorageError("Archive upload could not be read") from exc
+
+
+def _archive_source(
+    archive_data: bytes | str | PathLike[str],
+) -> BytesIO | str | PathLike[str]:
+    return BytesIO(archive_data) if isinstance(archive_data, bytes) else archive_data
+
+
+def _open_tar(
+    archive_data: bytes | str | PathLike[str],
+) -> tarfile.TarFile:
+    if isinstance(archive_data, bytes):
+        return tarfile.open(fileobj=BytesIO(archive_data), mode="r:*")
+    try:
+        return tarfile.open(name=archive_data, mode="r:*")
+    except OSError as exc:
+        raise FileStorageError("Archive upload could not be read") from exc

src/govoplan_files/backend/storage/backends.py

@@ -1,160 +1,32 @@
 from __future__ import annotations
 
-from dataclasses import dataclass, field
-from pathlib import Path
-from typing import Iterable, Protocol
+from govoplan_core.core.object_storage import (
+    LocalFilesystemStorageBackend,
+    S3StorageBackend,
+    StorageBackend,
+    StorageBackendError,
+    StorageObjectInfo,
+    StorageObjectMissing,
+    StorageObjectPage,
+    configured_storage_backend,
+)
 
 from govoplan_files.backend.runtime import settings
 
 
-class StorageBackendError(RuntimeError):
-    pass
-
-
-class StorageBackend(Protocol):
-    name: str
-
-    def put_bytes(self, key: str, data: bytes, *, content_type: str | None = None) -> None: ...
-    def get_bytes(self, key: str) -> bytes: ...
-    def iter_bytes(self, key: str, *, chunk_size: int = 1024 * 1024) -> Iterable[bytes]: ...
-    def delete(self, key: str) -> None: ...
-    def exists(self, key: str) -> bool: ...
-
-
-@dataclass(slots=True)
-class LocalFilesystemStorageBackend:
-    root: Path
-    fallback_roots: tuple[Path, ...] = field(default_factory=tuple)
-    name: str = "local"
-
-    def __post_init__(self) -> None:
-        self.root = self.root.expanduser().resolve()
-        self.fallback_roots = tuple(root.expanduser().resolve() for root in self.fallback_roots if root)
-        self.root.mkdir(parents=True, exist_ok=True)
-
-    def _path_for_root(self, root: Path, key: str) -> Path:
-        path = (root / key).resolve()
-        if not path.is_relative_to(root):
-            raise StorageBackendError("Storage key escapes local storage root")
-        return path
-
-    def _path(self, key: str) -> Path:
-        return self._path_for_root(self.root, key)
-
-    def _readable_path(self, key: str) -> Path:
-        primary = self._path(key)
-        if primary.exists() and primary.is_file():
-            return primary
-        for root in self.fallback_roots:
-            candidate = self._path_for_root(root, key)
-            if candidate.exists() and candidate.is_file():
-                return candidate
-        raise StorageBackendError("Stored object does not exist")
-
-    def put_bytes(self, key: str, data: bytes, *, content_type: str | None = None) -> None:
-        path = self._path(key)
-        path.parent.mkdir(parents=True, exist_ok=True)
-        path.write_bytes(data)
-
-    def get_bytes(self, key: str) -> bytes:
-        return self._readable_path(key).read_bytes()
-
-    def iter_bytes(self, key: str, *, chunk_size: int = 1024 * 1024) -> Iterable[bytes]:
-        path = self._readable_path(key)
-        with path.open("rb") as handle:
-            while True:
-                chunk = handle.read(chunk_size)
-                if not chunk:
-                    break
-                yield chunk
-
-    def delete(self, key: str) -> None:
-        path = self._path(key)
-        if path.exists() and path.is_file():
-            path.unlink()
-
-    def exists(self, key: str) -> bool:
-        try:
-            self._readable_path(key)
-        except StorageBackendError:
-            return False
-        return True
-
-
-@dataclass(slots=True)
-class S3StorageBackend:
-    bucket: str
-    endpoint_url: str
-    region_name: str
-    access_key_id: str
-    secret_access_key: str
-    name: str = "s3"
-
-    @property
-    def client(self):
-        try:
-            import boto3
-        except ModuleNotFoundError as exc:
-            raise StorageBackendError("boto3 is required for the S3 storage backend") from exc
-        return boto3.client(
-            "s3",
-            endpoint_url=self.endpoint_url,
-            region_name=self.region_name,
-            aws_access_key_id=self.access_key_id,
-            aws_secret_access_key=self.secret_access_key,
-        )
-
-    def put_bytes(self, key: str, data: bytes, *, content_type: str | None = None) -> None:
-        kwargs = {"Bucket": self.bucket, "Key": key, "Body": data}
-        if content_type:
-            kwargs["ContentType"] = content_type
-        self.client.put_object(**kwargs)
-
-    def get_bytes(self, key: str) -> bytes:
-        try:
-            obj = self.client.get_object(Bucket=self.bucket, Key=key)
-            return obj["Body"].read()
-        except Exception as exc:  # pragma: no cover - depends on S3 backend
-            raise StorageBackendError(str(exc)) from exc
-
-    def iter_bytes(self, key: str, *, chunk_size: int = 1024 * 1024) -> Iterable[bytes]:
-        try:
-            obj = self.client.get_object(Bucket=self.bucket, Key=key)
-            body = obj["Body"]
-            while True:
-                chunk = body.read(chunk_size)
-                if not chunk:
-                    break
-                yield chunk
-        except Exception as exc:  # pragma: no cover - depends on S3 backend
-            raise StorageBackendError(str(exc)) from exc
-
-    def delete(self, key: str) -> None:
-        self.client.delete_object(Bucket=self.bucket, Key=key)
-
-    def exists(self, key: str) -> bool:
-        try:
-            self.client.head_object(Bucket=self.bucket, Key=key)
-            return True
-        except Exception:
-            return False
-
-
-def _fallback_roots() -> tuple[Path, ...]:
-    raw = getattr(settings, "file_storage_local_fallback_roots", "") or ""
-    return tuple(Path(item.strip()) for item in str(raw).split(",") if item.strip())
-
-
 def get_storage_backend() -> StorageBackend:
-    backend = settings.file_storage_backend.lower().strip()
-    if backend in {"local", "filesystem", "fs"}:
-        return LocalFilesystemStorageBackend(Path(settings.file_storage_local_root), fallback_roots=_fallback_roots())
-    if backend in {"s3", "garage"}:
-        return S3StorageBackend(
-            bucket=settings.file_storage_s3_bucket or settings.s3_bucket,
-            endpoint_url=settings.file_storage_s3_endpoint_url or settings.s3_endpoint_url,
-            region_name=settings.file_storage_s3_region or settings.s3_region,
-            access_key_id=settings.file_storage_s3_access_key_id or settings.s3_access_key_id,
-            secret_access_key=settings.file_storage_s3_secret_access_key or settings.s3_secret_access_key,
-        )
-    raise StorageBackendError(f"Unsupported file storage backend: {settings.file_storage_backend}")
+    """Return the deployment-owned backend for Files-managed objects."""
+
+    return configured_storage_backend(settings)
+
+
+__all__ = [
+    "LocalFilesystemStorageBackend",
+    "S3StorageBackend",
+    "StorageBackend",
+    "StorageBackendError",
+    "StorageObjectInfo",
+    "StorageObjectMissing",
+    "StorageObjectPage",
+    "get_storage_backend",
+]

src/govoplan_files/backend/storage/campaign_attachments.py

@@ -12,9 +12,17 @@ from typing import Any, Iterator
 
 from sqlalchemy.orm import Session
 
-from govoplan_files.backend.db.models import FileAsset
-from govoplan_files.backend.storage.files import current_version_and_blob, list_assets_for_user, read_asset_bytes
+from govoplan_files.backend.db.models import FileAsset, FileBlob, FileShare, FileVersion
+from govoplan_files.backend.storage.backends import StorageBackend, get_storage_backend
+from govoplan_files.backend.storage.files import current_versions_and_blobs, get_asset_for_user, list_assets_for_user, share_files
+from govoplan_files.backend.storage.access import ensure_owner_access
 from govoplan_files.backend.storage.paths import normalize_folder, normalize_logical_path, safe_storage_component
+from govoplan_files.backend.storage.provenance import source_provenance_from_metadata, source_revision_from_metadata
+from govoplan_files.backend.storage.share_state import effective_file_share_clause
+from govoplan_files.backend.storage.integrity import (
+    ensure_blob_is_readable,
+    read_verified_blob_bytes,
+)
 
 
 MANAGED_SOURCE_PREFIX = "managed:"
@@ -34,10 +42,17 @@ class ManagedAttachmentFile:
     checksum_sha256: str
     size_bytes: int
     content_type: str | None
+    linked_to_campaign: bool = True
+    source_provenance: dict[str, Any] | None = None
+    source_revision: str | None = None
 
     def as_dict(self) -> dict[str, Any]:
         payload = asdict(self)
         payload.pop("local_path", None)
+        if payload.get("source_provenance") is None:
+            payload.pop("source_provenance", None)
+        if payload.get("source_revision") is None:
+            payload.pop("source_revision", None)
         return payload
 
 
@@ -47,6 +62,7 @@ class PreparedCampaignSnapshot:
     raw_json: dict[str, Any]
     managed_files_by_local_path: dict[str, ManagedAttachmentFile]
     shared_assets: list[FileAsset]
+    candidate_assets: list[FileAsset]
 
 
 def parse_managed_source(value: object) -> tuple[str, str] | None:
@@ -108,6 +124,99 @@ def _iter_rule_dicts(attachments: dict[str, Any], raw_json: dict[str, Any]):
                         yield rule
 
 
+def _managed_base_sources(raw_json: dict[str, Any]) -> list[tuple[str, str, str]]:
+    attachments = raw_json.get("attachments")
+    if not isinstance(attachments, dict):
+        return []
+    base_paths = attachments.get("base_paths")
+    if not isinstance(base_paths, list):
+        return []
+    sources: list[tuple[str, str, str]] = []
+    seen: set[tuple[str, str, str]] = set()
+    for item in base_paths:
+        if not isinstance(item, dict):
+            continue
+        parsed_source = parse_managed_source(item.get("source"))
+        if parsed_source is None:
+            continue
+        owner_type, owner_id = parsed_source
+        old_path = str(item.get("path") or ".").strip() or "."
+        logical_root = "" if old_path in {"", ".", "/"} else normalize_folder(old_path)
+        key = (owner_type, owner_id, logical_root)
+        if key in seen:
+            continue
+        seen.add(key)
+        sources.append(key)
+    return sources
+
+
+def _campaign_linked_asset_ids(
+    session: Session,
+    *,
+    tenant_id: str,
+    campaign_id: str,
+    asset_ids: list[str],
+) -> set[str]:
+    if not asset_ids:
+        return set()
+    linked: set[str] = set()
+    for offset in range(0, len(asset_ids), 900):
+        chunk = asset_ids[offset : offset + 900]
+        rows = (
+            session.query(FileShare.file_asset_id)
+            .filter(
+                FileShare.tenant_id == tenant_id,
+                FileShare.file_asset_id.in_(chunk),
+                FileShare.target_type == "campaign",
+                FileShare.target_id == campaign_id,
+                effective_file_share_clause(),
+            )
+            .all()
+        )
+        linked.update(row[0] for row in rows)
+    return linked
+
+
+def _candidate_assets_for_managed_sources(
+    session: Session,
+    *,
+    tenant_id: str,
+    campaign_id: str,
+    raw_json: dict[str, Any],
+    user_id: str,
+    is_admin: bool,
+    shared_assets: list[FileAsset],
+) -> tuple[list[FileAsset], set[str]]:
+    assets_by_id: dict[str, FileAsset] = {asset.id: asset for asset in shared_assets}
+    for owner_type, owner_id, logical_root in _managed_base_sources(raw_json):
+        ensure_owner_access(
+            session,
+            tenant_id=tenant_id,
+            owner_type=owner_type,
+            owner_id=owner_id,
+            user_id=user_id,
+            is_admin=is_admin,
+        )
+        for asset in list_assets_for_user(
+            session,
+            tenant_id=tenant_id,
+            user_id=user_id,
+            owner_type=owner_type,
+            owner_id=owner_id,
+            path_prefix=logical_root or None,
+            is_admin=is_admin,
+        ):
+            assets_by_id.setdefault(asset.id, asset)
+    candidate_assets = sorted(assets_by_id.values(), key=lambda asset: (asset.display_path, asset.updated_at, asset.id))
+    linked_ids = _campaign_linked_asset_ids(
+        session,
+        tenant_id=tenant_id,
+        campaign_id=campaign_id,
+        asset_ids=[asset.id for asset in candidate_assets],
+    )
+    return candidate_assets, linked_ids
+
+
 def _selected_base_path(
     rule: dict[str, Any],
     prepared_by_id: dict[str, tuple[str, str]],
@@ -127,6 +236,175 @@ def _selected_base_path(
     return None
 
 
+def _prepared_attachment_config(raw_json: dict[str, Any]) -> tuple[dict[str, Any], dict[str, Any], list[Any]]:
+    prepared_json = copy.deepcopy(raw_json if isinstance(raw_json, dict) else {})
+    attachments = prepared_json.get("attachments")
+    if not isinstance(attachments, dict):
+        attachments = {}
+        prepared_json["attachments"] = attachments
+    base_paths = attachments.get("base_paths")
+    if not isinstance(base_paths, list):
+        base_paths = []
+    return prepared_json, attachments, base_paths
+
+
+def _campaign_snapshot_assets(
+    session: Session,
+    *,
+    tenant_id: str,
+    campaign_id: str,
+    prepared_json: dict[str, Any],
+    include_unlinked_candidates: bool,
+    user_id: str,
+    is_admin: bool,
+) -> tuple[list[FileAsset], list[FileAsset], set[str]]:
+    shared_assets = list_assets_for_user(
+        session,
+        tenant_id=tenant_id,
+        user_id="",
+        campaign_id=campaign_id,
+        is_admin=True,
+    )
+    if not include_unlinked_candidates:
+        return shared_assets, shared_assets, {asset.id for asset in shared_assets}
+    candidate_assets, linked_asset_ids = _candidate_assets_for_managed_sources(
+        session,
+        tenant_id=tenant_id,
+        campaign_id=campaign_id,
+        raw_json=prepared_json,
+        user_id=user_id,
+        is_admin=is_admin,
+        shared_assets=shared_assets,
+    )
+    return shared_assets, candidate_assets, linked_asset_ids
+
+
+def _assets_grouped_by_owner(assets: list[FileAsset]) -> dict[tuple[str, str], list[FileAsset]]:
+    assets_by_owner: dict[tuple[str, str], list[FileAsset]] = defaultdict(list)
+    for asset in assets:
+        owner_id = _asset_owner_id(asset)
+        if owner_id:
+            assets_by_owner[(asset.owner_type, owner_id)].append(asset)
+    return assets_by_owner
+
+
+def _materialize_managed_asset(
+    asset: FileAsset,
+    *,
+    owner_id: str,
+    logical_root: str,
+    local_root: Path,
+    version_blobs: dict[str, tuple[FileVersion, FileBlob]],
+    backend: StorageBackend | None,
+    include_bytes: bool,
+    linked_asset_ids: set[str],
+) -> tuple[str, ManagedAttachmentFile] | None:
+    relative_path = _relative_asset_path(asset, logical_root)
+    if not relative_path:
+        return None
+    target = _safe_local_target(local_root, relative_path)
+    target.parent.mkdir(parents=True, exist_ok=True)
+    version, blob = version_blobs[asset.id]
+    ensure_blob_is_readable(blob)
+    if include_bytes:
+        data = read_verified_blob_bytes(blob, backend=backend) if backend else b""
+        target.write_bytes(data)
+    else:
+        target.touch()
+    local_key = str(target.resolve())
+    return local_key, ManagedAttachmentFile(
+        local_path=local_key,
+        asset_id=asset.id,
+        version_id=version.id,
+        blob_id=blob.id,
+        display_path=asset.display_path,
+        relative_path=normalize_logical_path(relative_path),
+        filename=asset.filename,
+        owner_type=asset.owner_type,
+        owner_id=owner_id,
+        checksum_sha256=blob.checksum_sha256,
+        size_bytes=blob.size_bytes,
+        content_type=blob.content_type,
+        linked_to_campaign=asset.id in linked_asset_ids,
+        source_provenance=source_provenance_from_metadata(asset.metadata_),
+        source_revision=source_revision_from_metadata(asset.metadata_),
+    )
+
+
+def _prepare_managed_base_paths(
+    base_paths: list[Any],
+    *,
+    materialized_root: Path,
+    assets_by_owner: dict[tuple[str, str], list[FileAsset]],
+    version_blobs: dict[str, tuple[FileVersion, FileBlob]],
+    backend: StorageBackend | None,
+    include_bytes: bool,
+    linked_asset_ids: set[str],
+) -> tuple[
+    dict[str, ManagedAttachmentFile],
+    dict[str, tuple[str, str]],
+    dict[str, list[tuple[str, str]]],
+    tuple[str, str] | None,
+]:
+    manifest: dict[str, ManagedAttachmentFile] = {}
+    prepared_by_id: dict[str, tuple[str, str]] = {}
+    prepared_by_old_path: dict[str, list[tuple[str, str]]] = {}
+    first_prepared: tuple[str, str] | None = None
+    for index, item in enumerate(base_paths):
+        if not isinstance(item, dict):
+            continue
+        parsed_source = parse_managed_source(item.get("source"))
+        if parsed_source is None:
+            continue
+        owner_type, owner_id = parsed_source
+        old_path = str(item.get("path") or ".").strip() or "."
+        logical_root = "" if old_path in {"", ".", "/"} else normalize_folder(old_path)
+        base_path_id = str(item.get("id") or f"base-path-{index + 1}")
+        local_root = materialized_root / f"{index + 1:03d}-{safe_storage_component(base_path_id)}"
+        local_root.mkdir(parents=True, exist_ok=True)
+        local_root_string = str(local_root.resolve())
+        prepared = (base_path_id, local_root_string)
+        prepared_by_id[base_path_id] = prepared
+        prepared_by_old_path.setdefault(old_path, []).append(prepared)
+        if first_prepared is None:
+            first_prepared = prepared
+        item["path"] = local_root_string
+        for asset in assets_by_owner.get((owner_type, owner_id), []):
+            materialized = _materialize_managed_asset(
+                asset,
+                owner_id=owner_id,
+                logical_root=logical_root,
+                local_root=local_root,
+                version_blobs=version_blobs,
+                backend=backend,
+                include_bytes=include_bytes,
+                linked_asset_ids=linked_asset_ids,
+            )
+            if materialized is not None:
+                local_key, managed_file = materialized
+                manifest[local_key] = managed_file
+    return manifest, prepared_by_id, prepared_by_old_path, first_prepared
+
+
+def _rewrite_managed_attachment_rules(
+    attachments: dict[str, Any],
+    prepared_json: dict[str, Any],
+    *,
+    prepared_by_id: dict[str, tuple[str, str]],
+    prepared_by_old_path: dict[str, list[tuple[str, str]]],
+    first_prepared: tuple[str, str] | None,
+) -> None:
+    for rule in _iter_rule_dicts(attachments, prepared_json):
+        selected = _selected_base_path(rule, prepared_by_id, prepared_by_old_path, first_prepared)
+        if selected is None:
+            continue
+        base_path_id, local_root_string = selected
+        rule["base_path_id"] = base_path_id
+        rule["base_dir"] = local_root_string
+    if first_prepared is not None:
+        attachments["base_path"] = first_prepared[1]
+
+
 def prepare_campaign_snapshot(
     session: Session,
     *,
@@ -135,6 +413,9 @@ def prepare_campaign_snapshot(
     raw_json: dict[str, Any],
     destination: Path,
     include_bytes: bool,
+    include_unlinked_candidates: bool = False,
+    user_id: str = "",
+    is_admin: bool = False,
 ) -> PreparedCampaignSnapshot:
     """Create a temporary file-oriented campaign snapshot for managed attachments.
 
@@ -150,94 +431,35 @@ def prepare_campaign_snapshot(
     materialized_root = destination / "managed-attachments"
     materialized_root.mkdir(parents=True, exist_ok=True)
 
-    prepared_json = copy.deepcopy(raw_json if isinstance(raw_json, dict) else {})
-    attachments = prepared_json.get("attachments")
-    if not isinstance(attachments, dict):
-        attachments = {}
-        prepared_json["attachments"] = attachments
-    base_paths = attachments.get("base_paths")
-    if not isinstance(base_paths, list):
-        base_paths = []
-
-    shared_assets = list_assets_for_user(
+    prepared_json, attachments, base_paths = _prepared_attachment_config(raw_json)
+    shared_assets, candidate_assets, linked_asset_ids = _campaign_snapshot_assets(
         session,
         tenant_id=tenant_id,
-        user_id="",
         campaign_id=campaign_id,
-        is_admin=True,
+        prepared_json=prepared_json,
+        include_unlinked_candidates=include_unlinked_candidates,
+        user_id=user_id,
+        is_admin=is_admin,
+    )
+    assets_by_owner = _assets_grouped_by_owner(candidate_assets)
+    version_blobs = current_versions_and_blobs(session, candidate_assets)
+    backend = get_storage_backend() if include_bytes else None
+    manifest, prepared_by_id, prepared_by_old_path, first_prepared = _prepare_managed_base_paths(
+        base_paths,
+        materialized_root=materialized_root,
+        assets_by_owner=assets_by_owner,
+        version_blobs=version_blobs,
+        backend=backend,
+        include_bytes=include_bytes,
+        linked_asset_ids=linked_asset_ids,
+    )
+    _rewrite_managed_attachment_rules(
+        attachments,
+        prepared_json,
+        prepared_by_id=prepared_by_id,
+        prepared_by_old_path=prepared_by_old_path,
+        first_prepared=first_prepared,
     )
-
-    assets_by_owner: dict[tuple[str, str], list[FileAsset]] = defaultdict(list)
-    for asset in shared_assets:
-        owner_id = _asset_owner_id(asset)
-        if owner_id:
-            assets_by_owner[(asset.owner_type, owner_id)].append(asset)
-
-    manifest: dict[str, ManagedAttachmentFile] = {}
-    prepared_by_id: dict[str, tuple[str, str]] = {}
-    prepared_by_old_path: dict[str, list[tuple[str, str]]] = {}
-    first_prepared: tuple[str, str] | None = None
-
-    for index, item in enumerate(base_paths):
-        if not isinstance(item, dict):
-            continue
-        parsed_source = parse_managed_source(item.get("source"))
-        if parsed_source is None:
-            continue
-        owner_type, owner_id = parsed_source
-        old_path = str(item.get("path") or ".").strip() or "."
-        logical_root = "" if old_path in {"", ".", "/"} else normalize_folder(old_path)
-        base_path_id = str(item.get("id") or f"base-path-{index + 1}")
-        local_root = materialized_root / f"{index + 1:03d}-{safe_storage_component(base_path_id)}"
-        local_root.mkdir(parents=True, exist_ok=True)
-        local_root_string = str(local_root.resolve())
-
-        prepared = (base_path_id, local_root_string)
-        prepared_by_id[base_path_id] = prepared
-        prepared_by_old_path.setdefault(old_path, []).append(prepared)
-        if first_prepared is None:
-            first_prepared = prepared
-
-        item["path"] = local_root_string
-
-        for asset in assets_by_owner.get((owner_type, owner_id), []):
-            relative_path = _relative_asset_path(asset, logical_root)
-            if not relative_path:
-                continue
-            target = _safe_local_target(local_root, relative_path)
-            target.parent.mkdir(parents=True, exist_ok=True)
-            if include_bytes:
-                data, version, blob = read_asset_bytes(session, asset)
-                target.write_bytes(data)
-            else:
-                version, blob = current_version_and_blob(session, asset)
-                target.touch()
-            local_key = str(target.resolve())
-            manifest[local_key] = ManagedAttachmentFile(
-                local_path=local_key,
-                asset_id=asset.id,
-                version_id=version.id,
-                blob_id=blob.id,
-                display_path=asset.display_path,
-                relative_path=normalize_logical_path(relative_path),
-                filename=asset.filename,
-                owner_type=asset.owner_type,
-                owner_id=owner_id,
-                checksum_sha256=blob.checksum_sha256,
-                size_bytes=blob.size_bytes,
-                content_type=blob.content_type,
-            )
-
-    for rule in _iter_rule_dicts(attachments, prepared_json):
-        selected = _selected_base_path(rule, prepared_by_id, prepared_by_old_path, first_prepared)
-        if selected is None:
-            continue
-        base_path_id, local_root_string = selected
-        rule["base_path_id"] = base_path_id
-        rule["base_dir"] = local_root_string
-
-    if first_prepared is not None:
-        attachments["base_path"] = first_prepared[1]
 
     snapshot_path = destination / "campaign.json"
     snapshot_path.write_text(json.dumps(prepared_json, ensure_ascii=False, indent=2), encoding="utf-8")
@@ -246,6 +468,7 @@ def prepare_campaign_snapshot(
         raw_json=prepared_json,
         managed_files_by_local_path=manifest,
         shared_assets=shared_assets,
+        candidate_assets=candidate_assets,
     )
 
 
@@ -257,7 +480,10 @@ def prepared_campaign_snapshot(
     campaign_id: str,
     raw_json: dict[str, Any],
     include_bytes: bool,
-    prefix: str = "multimailer-managed-campaign-",
+    prefix: str = "govoplan-managed-campaign-",
+    include_unlinked_candidates: bool = False,
+    user_id: str = "",
+    is_admin: bool = False,
 ) -> Iterator[PreparedCampaignSnapshot]:
     temp_dir = Path(tempfile.mkdtemp(prefix=prefix))
     try:
@@ -268,6 +494,9 @@ def prepared_campaign_snapshot(
             raw_json=raw_json,
             destination=temp_dir,
             include_bytes=include_bytes,
+            include_unlinked_candidates=include_unlinked_candidates,
+            user_id=user_id,
+            is_admin=is_admin,
         )
     finally:
         shutil.rmtree(temp_dir, ignore_errors=True)
@@ -285,6 +514,53 @@ def managed_match_payloads(
     return payloads
 
 
+def share_assets_with_campaign(
+    session: Session,
+    *,
+    tenant_id: str,
+    campaign_id: str,
+    file_ids: list[str],
+    user_id: str,
+    is_admin: bool = False,
+) -> list[dict[str, Any]]:
+    unique_ids = list(dict.fromkeys(file_id for file_id in file_ids if file_id))
+    if not unique_ids:
+        return []
+    assets = [
+        get_asset_for_user(
+            session,
+            tenant_id=tenant_id,
+            user_id=user_id,
+            asset_id=file_id,
+            require_write=True,
+            is_admin=is_admin,
+        )
+        for file_id in unique_ids
+    ]
+    shares = share_files(
+        session,
+        tenant_id=tenant_id,
+        assets=assets,
+        target_type="campaign",
+        target_id=campaign_id,
+        permission="read",
+        user_id=user_id,
+    )
+    session.flush()
+    return [
+        {
+            "id": share.id,
+            "file_asset_id": share.file_asset_id,
+            "target_type": share.target_type,
+            "target_id": share.target_id,
+            "permission": share.permission,
+            "created_at": share.created_at.isoformat() if share.created_at else None,
+            "revoked_at": share.revoked_at.isoformat() if share.revoked_at else None,
+        }
+        for share in shares
+    ]
+
+
 def public_attachment_summary_payload(value: Any) -> dict[str, Any]:
     """Return an attachment summary without temporary materialization paths.
 

src/govoplan_files/backend/storage/campaign_usage.py

@@ -1,17 +1,17 @@
 from __future__ import annotations
 
 from collections import defaultdict
+from dataclasses import dataclass, field
 from pathlib import PurePosixPath
-from typing import TYPE_CHECKING, Iterable
+from typing import Any, Iterable
 
 from sqlalchemy.orm import Session
 
 from govoplan_files.backend.db.models import CampaignAttachmentUse, FileAsset, FileBlob, FileVersion
 from govoplan_files.backend.storage.common import utcnow
-from govoplan_files.backend.storage.files import current_version_and_blob, list_assets_for_user
+from govoplan_files.backend.storage.files import current_versions_and_blobs, list_assets_for_user
 
-if TYPE_CHECKING:
-    from govoplan_campaign.backend.db.models import CampaignJob
+CampaignJobLike = Any
 
 
 def _candidate_match_keys(raw_match: str) -> set[str]:
@@ -25,11 +25,20 @@ def _candidate_match_keys(raw_match: str) -> set[str]:
 AttachmentUseKey = tuple[str, str, str, str]
 
 
+@dataclass(slots=True)
+class _AttachmentBatchRefs:
+    managed_by_job: dict[str, list[dict[str, object]]] = field(default_factory=lambda: defaultdict(list))
+    fallback_attachments_by_job: dict[str, list[dict[str, object]]] = field(default_factory=lambda: defaultdict(list))
+    asset_ids: set[str] = field(default_factory=set)
+    version_ids: set[str] = field(default_factory=set)
+    blob_ids: set[str] = field(default_factory=set)
+
+
 def _attachment_use_key(*, job_id: str, file_version_id: str, filename_used: str, stage: str) -> AttachmentUseKey:
     return job_id, file_version_id, filename_used, stage
 
 
-def _known_use_keys_for_jobs(session: Session, jobs: Iterable[CampaignJob], *, stage: str) -> set[AttachmentUseKey]:
+def _known_use_keys_for_jobs(session: Session, jobs: Iterable[CampaignJobLike], *, stage: str) -> set[AttachmentUseKey]:
     job_ids = {job.id for job in jobs if job.id}
     if not job_ids:
         return set()
@@ -72,13 +81,13 @@ def _known_use_keys_for_jobs(session: Session, jobs: Iterable[CampaignJob], *, s
     return keys
 
 
-def _known_use_keys(session: Session, job: CampaignJob, *, stage: str) -> set[AttachmentUseKey]:
+def _known_use_keys(session: Session, job: CampaignJobLike, *, stage: str) -> set[AttachmentUseKey]:
     return _known_use_keys_for_jobs(session, [job], stage=stage)
 
 
 def _add_use(
     session: Session,
-    job: CampaignJob,
+    job: CampaignJobLike,
     *,
     asset: FileAsset,
     version: FileVersion,
@@ -118,7 +127,7 @@ def _add_use(
 
 def record_campaign_attachment_uses_for_jobs(
     session: Session,
-    jobs: Iterable[CampaignJob],
+    jobs: Iterable[CampaignJobLike],
     *,
     stage: str = "built",
 ) -> None:
@@ -135,62 +144,91 @@ def record_campaign_attachment_uses_for_jobs(
     if not job_list:
         return
 
-    managed_by_job: dict[str, list[dict[str, object]]] = defaultdict(list)
-    fallback_attachments_by_job: dict[str, list[dict[str, object]]] = defaultdict(list)
+    refs = _collect_attachment_batch_refs(job_list)
     job_by_id = {job.id: job for job in job_list}
-    asset_ids: set[str] = set()
-    version_ids: set[str] = set()
-    blob_ids: set[str] = set()
+    known_keys = _known_use_keys_for_jobs(session, job_list, stage=stage)
+    assets_by_id, versions_by_id, blobs_by_id = _load_managed_attachment_entities(session, refs)
 
-    for job in job_list:
+    _record_managed_attachment_uses(
+        session,
+        job_by_id=job_by_id,
+        managed_by_job=refs.managed_by_job,
+        assets_by_id=assets_by_id,
+        versions_by_id=versions_by_id,
+        blobs_by_id=blobs_by_id,
+        stage=stage,
+        known_keys=known_keys,
+    )
+    _record_fallback_attachment_uses(
+        session,
+        job_by_id=job_by_id,
+        fallback_attachments_by_job=refs.fallback_attachments_by_job,
+        stage=stage,
+        known_keys=known_keys,
+    )
+
+
+def _collect_attachment_batch_refs(jobs: list[CampaignJobLike]) -> _AttachmentBatchRefs:
+    refs = _AttachmentBatchRefs()
+    for job in jobs:
         attachments = job.resolved_attachments or []
         if not isinstance(attachments, list):
             continue
         for attachment in attachments:
             if not isinstance(attachment, dict):
                 continue
-            managed_matches = attachment.get("managed_matches")
-            if isinstance(managed_matches, list) and managed_matches:
-                for item in managed_matches:
-                    if not isinstance(item, dict):
-                        continue
-                    asset_id = str(item.get("asset_id") or "")
-                    version_id = str(item.get("version_id") or "")
-                    blob_id = str(item.get("blob_id") or "")
-                    if not asset_id or not version_id or not blob_id:
-                        continue
-                    managed_by_job[job.id].append(item)
-                    asset_ids.add(asset_id)
-                    version_ids.add(version_id)
-                    blob_ids.add(blob_id)
-            else:
-                fallback_attachments_by_job[job.id].append(attachment)
+            if not _collect_managed_attachment_refs(refs, job.id, attachment):
+                refs.fallback_attachments_by_job[job.id].append(attachment)
+    return refs
 
-    assets_by_id = {
-        item.id: item
-        for item in session.query(FileAsset).filter(FileAsset.id.in_(asset_ids)).all()
-    } if asset_ids else {}
-    versions_by_id = {
-        item.id: item
-        for item in session.query(FileVersion).filter(FileVersion.id.in_(version_ids)).all()
-    } if version_ids else {}
-    blobs_by_id = {
-        item.id: item
-        for item in session.query(FileBlob).filter(FileBlob.id.in_(blob_ids)).all()
-    } if blob_ids else {}
-    known_keys = _known_use_keys_for_jobs(session, job_list, stage=stage)
 
+def _collect_managed_attachment_refs(refs: _AttachmentBatchRefs, job_id: str, attachment: dict[str, object]) -> bool:
+    managed_matches = attachment.get("managed_matches")
+    if not isinstance(managed_matches, list) or not managed_matches:
+        return False
+    for item in managed_matches:
+        if not isinstance(item, dict):
+            continue
+        asset_id = str(item.get("asset_id") or "")
+        version_id = str(item.get("version_id") or "")
+        blob_id = str(item.get("blob_id") or "")
+        if not asset_id or not version_id or not blob_id:
+            continue
+        refs.managed_by_job[job_id].append(item)
+        refs.asset_ids.add(asset_id)
+        refs.version_ids.add(version_id)
+        refs.blob_ids.add(blob_id)
+    return True
+
+
+def _load_managed_attachment_entities(
+    session: Session,
+    refs: _AttachmentBatchRefs,
+) -> tuple[dict[str, FileAsset], dict[str, FileVersion], dict[str, FileBlob]]:
+    assets_by_id = {item.id: item for item in session.query(FileAsset).filter(FileAsset.id.in_(refs.asset_ids)).all()} if refs.asset_ids else {}
+    versions_by_id = {item.id: item for item in session.query(FileVersion).filter(FileVersion.id.in_(refs.version_ids)).all()} if refs.version_ids else {}
+    blobs_by_id = {item.id: item for item in session.query(FileBlob).filter(FileBlob.id.in_(refs.blob_ids)).all()} if refs.blob_ids else {}
+    return assets_by_id, versions_by_id, blobs_by_id
+
+
+def _record_managed_attachment_uses(
+    session: Session,
+    *,
+    job_by_id: dict[str, CampaignJobLike],
+    managed_by_job: dict[str, list[dict[str, object]]],
+    assets_by_id: dict[str, FileAsset],
+    versions_by_id: dict[str, FileVersion],
+    blobs_by_id: dict[str, FileBlob],
+    stage: str,
+    known_keys: set[AttachmentUseKey],
+) -> None:
     for job_id, items in managed_by_job.items():
         job = job_by_id[job_id]
         for item in items:
             asset = assets_by_id.get(str(item.get("asset_id") or ""))
             version = versions_by_id.get(str(item.get("version_id") or ""))
             blob = blobs_by_id.get(str(item.get("blob_id") or ""))
-            if not asset or not version or not blob:
-                continue
-            if asset.tenant_id != job.tenant_id or version.tenant_id != job.tenant_id or blob.tenant_id != job.tenant_id:
-                continue
-            if version.file_asset_id != asset.id or version.blob_id != blob.id:
+            if not _managed_attachment_entities_match_job(job, asset, version, blob):
                 continue
             _add_use(
                 session,
@@ -203,53 +241,109 @@ def record_campaign_attachment_uses_for_jobs(
                 known_keys=known_keys,
             )
 
+
+def _managed_attachment_entities_match_job(
+    job: CampaignJobLike,
+    asset: FileAsset | None,
+    version: FileVersion | None,
+    blob: FileBlob | None,
+) -> bool:
+    if not asset or not version or not blob:
+        return False
+    if asset.tenant_id != job.tenant_id or version.tenant_id != job.tenant_id or blob.tenant_id != job.tenant_id:
+        return False
+    return version.file_asset_id == asset.id and version.blob_id == blob.id
+
+
+def _record_fallback_attachment_uses(
+    session: Session,
+    *,
+    job_by_id: dict[str, CampaignJobLike],
+    fallback_attachments_by_job: dict[str, list[dict[str, object]]],
+    stage: str,
+    known_keys: set[AttachmentUseKey],
+) -> None:
     assets_by_campaign: dict[tuple[str, str], dict[str, FileAsset]] = {}
+    version_blobs_by_campaign: dict[tuple[str, str], dict[str, tuple[FileVersion, FileBlob]]] = {}
     for job_id, attachments in fallback_attachments_by_job.items():
         job = job_by_id[job_id]
         campaign_key = (job.tenant_id, job.campaign_id)
-        by_key = assets_by_campaign.get(campaign_key)
-        if by_key is None:
-            assets = list_assets_for_user(
-                session,
-                tenant_id=job.tenant_id,
-                user_id="",
-                campaign_id=job.campaign_id,
-                is_admin=True,
-            )
-            by_key = {}
-            for asset in assets:
-                by_key[asset.display_path.strip("/")] = asset
-                by_key.setdefault(asset.filename, asset)
-            assets_by_campaign[campaign_key] = by_key
-
+        by_key, version_blobs = _fallback_campaign_assets(
+            session,
+            job,
+            campaign_key=campaign_key,
+            assets_by_campaign=assets_by_campaign,
+            version_blobs_by_campaign=version_blobs_by_campaign,
+        )
         for attachment in attachments:
-            matches = attachment.get("matches") if isinstance(attachment.get("matches"), list) else []
-            for raw in matches:
-                if not isinstance(raw, str):
-                    continue
-                asset = next((by_key[key] for key in _candidate_match_keys(raw) if key in by_key), None)
-                if not asset:
-                    continue
-                version, blob = current_version_and_blob(session, asset)
-                _add_use(
-                    session,
-                    job,
-                    asset=asset,
-                    version=version,
-                    blob=blob,
-                    filename_used=asset.filename,
-                    stage=stage,
-                    known_keys=known_keys,
-                )
+            _record_fallback_attachment(session, job, attachment, by_key=by_key, version_blobs=version_blobs, stage=stage, known_keys=known_keys)
 
 
-def record_campaign_attachment_uses_for_job(session: Session, job: CampaignJob, *, stage: str = "built") -> None:
+def _fallback_campaign_assets(
+    session: Session,
+    job: CampaignJobLike,
+    *,
+    campaign_key: tuple[str, str],
+    assets_by_campaign: dict[tuple[str, str], dict[str, FileAsset]],
+    version_blobs_by_campaign: dict[tuple[str, str], dict[str, tuple[FileVersion, FileBlob]]],
+) -> tuple[dict[str, FileAsset], dict[str, tuple[FileVersion, FileBlob]]]:
+    by_key = assets_by_campaign.get(campaign_key)
+    if by_key is None:
+        assets = list_assets_for_user(session, tenant_id=job.tenant_id, user_id="", campaign_id=job.campaign_id, is_admin=True)
+        by_key = _asset_lookup_by_path_and_filename(assets)
+        assets_by_campaign[campaign_key] = by_key
+        version_blobs_by_campaign[campaign_key] = current_versions_and_blobs(session, assets)
+    return by_key, version_blobs_by_campaign[campaign_key]
+
+
+def _asset_lookup_by_path_and_filename(assets: list[FileAsset]) -> dict[str, FileAsset]:
+    by_key: dict[str, FileAsset] = {}
+    for asset in assets:
+        by_key[asset.display_path.strip("/")] = asset
+        by_key.setdefault(asset.filename, asset)
+    return by_key
+
+
+def _record_fallback_attachment(
+    session: Session,
+    job: CampaignJobLike,
+    attachment: dict[str, object],
+    *,
+    by_key: dict[str, FileAsset],
+    version_blobs: dict[str, tuple[FileVersion, FileBlob]],
+    stage: str,
+    known_keys: set[AttachmentUseKey],
+) -> None:
+    matches = attachment.get("matches") if isinstance(attachment.get("matches"), list) else []
+    for raw in matches:
+        if not isinstance(raw, str):
+            continue
+        asset = next((by_key[key] for key in _candidate_match_keys(raw) if key in by_key), None)
+        if not asset:
+            continue
+        version_blob = version_blobs.get(asset.id)
+        if not version_blob:
+            continue
+        version, blob = version_blob
+        _add_use(
+            session,
+            job,
+            asset=asset,
+            version=version,
+            blob=blob,
+            filename_used=asset.filename,
+            stage=stage,
+            known_keys=known_keys,
+        )
+
+
+def record_campaign_attachment_uses_for_job(session: Session, job: CampaignJobLike, *, stage: str = "built") -> None:
     """Record immutable managed file versions used by one built/sent job."""
 
     record_campaign_attachment_uses_for_jobs(session, [job], stage=stage)
 
 
-def mark_job_attachment_uses_sent(session: Session, job: CampaignJob) -> None:
+def mark_job_attachment_uses_sent(session: Session, job: CampaignJobLike) -> None:
     record_campaign_attachment_uses_for_job(session, job, stage="built")
     # Sessions use autoflush=False. Flush any compatibility-built evidence so
     # the following query can copy it to the sent stage in the same call.

src/govoplan_files/backend/storage/connector_browse.py

@@ -0,0 +1,923 @@
+from __future__ import annotations
+
+import json
+from collections.abc import Mapping
+from dataclasses import dataclass, field
+from datetime import datetime, timezone
+from email.utils import parsedate_to_datetime
+from importlib import import_module
+import mimetypes
+from typing import Any
+from urllib.parse import quote, unquote, urljoin, urlsplit
+import xml.etree.ElementTree as ET  # nosec B405 - typing/element creation only; parsing uses defusedxml below.
+
+from defusedxml import ElementTree as SafeElementTree
+
+from govoplan_core.security.outbound_http import (
+    OutboundHttpError,
+    validate_outbound_host,
+    validate_outbound_http_url,
+)
+
+from govoplan_files.backend.storage.http_client import ConnectorHttpError, request_connector_bytes
+from govoplan_files.backend.storage.connector_deployment import (
+    ConnectorDeploymentConfigurationError,
+    connector_ca_bundle_path,
+    connector_secret_env_value,
+    validate_connector_tls_metadata,
+)
+from govoplan_files.backend.storage.connector_profiles import ConnectorProfile
+from govoplan_files.backend.storage.sdk_peer_pinning import (
+    SdkPeerPinningError,
+    create_pinned_s3_client,
+    install_pinned_smb_transport,
+    pinned_smb_connection_cache,
+)
+
+
+class ConnectorBrowseError(RuntimeError):
+    pass
+
+
+class ConnectorBrowseUnsupported(ConnectorBrowseError):
+    pass
+
+
+@dataclass(frozen=True, slots=True)
+class ConnectorBrowseItem:
+    kind: str
+    name: str
+    path: str
+    external_id: str | None = None
+    external_url: str | None = None
+    size_bytes: int | None = None
+    content_type: str | None = None
+    modified_at: str | None = None
+    etag: str | None = None
+    metadata: Mapping[str, Any] = field(default_factory=dict)
+
+    def to_response(self) -> dict[str, Any]:
+        return {
+            "kind": self.kind,
+            "name": self.name,
+            "path": self.path,
+            "external_id": self.external_id,
+            "external_url": self.external_url,
+            "size_bytes": self.size_bytes,
+            "content_type": self.content_type,
+            "modified_at": self.modified_at,
+            "etag": self.etag,
+            "metadata": dict(self.metadata),
+        }
+
+
+def browse_connector_profile(profile: ConnectorProfile, *, path: str | None = None, library_id: str | None = None, continuation_token: str | None = None) -> list[ConnectorBrowseItem]:
+    browse_path = normalize_connector_browse_path(path)
+    static_items = _static_listing(profile, path=browse_path, library_id=library_id)
+    if static_items is not None:
+        return static_items
+    if profile.provider == "seafile":
+        if _metadata_string(profile, "browse_protocol") == "webdav" or _metadata_string(profile, "webdav_endpoint_url"):
+            return _browse_webdav(profile, path=browse_path)
+        return _browse_seafile(profile, path=browse_path, library_id=library_id)
+    if profile.provider in {"webdav", "nextcloud"} or _metadata_string(profile, "browse_protocol") == "webdav":
+        return _browse_webdav(profile, path=browse_path)
+    if profile.provider == "smb":
+        return _browse_smb(profile, path=browse_path)
+    if profile.provider == "s3":
+        return _browse_s3(profile, path=browse_path, library_id=library_id, continuation_token=continuation_token)
+    raise ConnectorBrowseUnsupported(f"Read-only browsing is not implemented for {profile.provider} connector profiles yet")
+
+
+def parse_webdav_multistatus(*, root_url: str, current_path: str, payload: str | bytes) -> list[ConnectorBrowseItem]:
+    try:
+        root = SafeElementTree.fromstring(payload)
+    except SafeElementTree.ParseError as exc:
+        raise ConnectorBrowseError("Connector returned invalid WebDAV XML") from exc
+    root_path = _url_path_root(root_url)
+    current = normalize_connector_browse_path(current_path)
+    items: list[ConnectorBrowseItem] = []
+    for response in root.findall("{DAV:}response"):
+        href = response.findtext("{DAV:}href")
+        if not href:
+            continue
+        relative_path = _relative_href_path(root_path, href)
+        if relative_path == current:
+            continue
+        if current and not relative_path.startswith(current.rstrip("/") + "/"):
+            continue
+        parent = relative_path.rsplit("/", 1)[0] if "/" in relative_path else ""
+        if parent != current:
+            continue
+        prop = _webdav_prop(response)
+        is_collection = prop.find("{DAV:}resourcetype/{DAV:}collection") is not None if prop is not None else False
+        name = _webdav_display_name(prop) or _path_name(relative_path)
+        if not name:
+            continue
+        items.append(
+            ConnectorBrowseItem(
+                kind="folder" if is_collection else "file",
+                name=name,
+                path=relative_path,
+                external_id=_text(prop, "{DAV:}getetag") or relative_path,
+                size_bytes=None if is_collection else _int(_text(prop, "{DAV:}getcontentlength")),
+                content_type=None if is_collection else _text(prop, "{DAV:}getcontenttype"),
+                modified_at=_http_date(_text(prop, "{DAV:}getlastmodified")),
+                etag=_text(prop, "{DAV:}getetag"),
+            )
+        )
+    return sorted(items, key=lambda item: (item.kind != "library", item.kind != "folder", item.name.casefold(), item.path.casefold()))
+
+
+def seafile_libraries_from_payload(payload: object) -> list[ConnectorBrowseItem]:
+    if not isinstance(payload, list):
+        raise ConnectorBrowseError("Seafile library response must be a list")
+    libraries = [_seafile_library_item(item) for item in payload if isinstance(item, Mapping)]
+    return sorted(libraries, key=lambda item: item.name.casefold())
+
+
+def seafile_directory_items_from_payload(payload: object, *, path: str | None = None) -> list[ConnectorBrowseItem]:
+    if payload == "uptodate":
+        return []
+    if not isinstance(payload, list):
+        raise ConnectorBrowseError("Seafile directory response must be a list")
+    browse_path = normalize_connector_browse_path(path)
+    items = [_seafile_directory_item(item, parent_path=browse_path) for item in payload if isinstance(item, Mapping)]
+    return sorted(items, key=lambda item: (item.kind != "folder", item.name.casefold(), item.path.casefold()))
+
+
+def _browse_seafile(profile: ConnectorProfile, *, path: str, library_id: str | None) -> list[ConnectorBrowseItem]:
+    repo_id, dir_path = _seafile_repo_and_path(path=path, library_id=library_id)
+    headers = _seafile_headers(profile)
+    if not repo_id:
+        payload = _request_json("GET", _seafile_url(profile, "api2/repos/"), headers=headers)
+        return seafile_libraries_from_payload(payload)
+    payload = _request_json(
+        "GET",
+        _seafile_url(profile, f"api2/repos/{quote(repo_id, safe='')}/dir/"),
+        headers=headers,
+        params={"p": "/" + dir_path if dir_path else "/"},
+    )
+    return seafile_directory_items_from_payload(payload, path=dir_path)
+
+
+def _browse_webdav(profile: ConnectorProfile, *, path: str) -> list[ConnectorBrowseItem]:
+    root_url = _metadata_string(profile, "webdav_endpoint_url") or profile.endpoint_url
+    if not root_url:
+        raise ConnectorBrowseError("Connector profile does not define an endpoint URL")
+    url = _webdav_url(root_url, path)
+    headers = {"Depth": "1", "Content-Type": "application/xml; charset=utf-8"}
+    auth: tuple[str, str] | None = None
+    password = _profile_password(profile)
+    token = _profile_token(profile)
+    if profile.username and password:
+        auth = (profile.username, password)
+    elif token:
+        headers["Authorization"] = f"Bearer {token}"
+    elif profile.credential_mode.casefold() not in {"", "none", "anonymous"} and profile.secret_ref:
+        raise ConnectorBrowseError("Secret-ref connector credentials need a runtime secret resolver before live browsing")
+    body = """<?xml version="1.0" encoding="utf-8"?>
+<propfind xmlns="DAV:">
+  <prop>
+    <displayname />
+    <resourcetype />
+    <getcontentlength />
+    <getcontenttype />
+    <getlastmodified />
+    <getetag />
+  </prop>
+</propfind>"""
+    try:
+        response = request_connector_bytes(
+            "PROPFIND",
+            url,
+            headers=headers,
+            content=body,
+            auth=auth,
+            timeout=15.0,
+            label="WebDAV browse",
+        )
+    except ConnectorHttpError as exc:
+        raise ConnectorBrowseError(f"Connector browse failed: {exc}") from exc
+    if response.status_code in {401, 403}:
+        raise ConnectorBrowseError("Connector credentials were rejected")
+    if response.status_code not in {200, 207}:
+        raise ConnectorBrowseError(f"Connector browse failed with HTTP {response.status_code}")
+    return parse_webdav_multistatus(root_url=root_url, current_path=path, payload=response.content)
+
+
+def _browse_smb(profile: ConnectorProfile, *, path: str) -> list[ConnectorBrowseItem]:
+    location = _smb_location(profile)
+    unc_path = _smb_unc_path(location, path)
+    smbclient = _smbclient_module()
+    try:
+        entries = smbclient.scandir(unc_path, **_smb_client_kwargs(profile, location))
+    except Exception as exc:  # pragma: no cover - concrete exception types are dependency-version specific
+        raise ConnectorBrowseError(f"SMB connector browse failed: {exc}") from exc
+    items: list[ConnectorBrowseItem] = []
+    try:
+        with entries as iterator:
+            for entry in iterator:
+                name = _clean(getattr(entry, "name", None))
+                if not name or name in {".", ".."}:
+                    continue
+                try:
+                    is_dir = bool(entry.is_dir())
+                except Exception:
+                    is_dir = False
+                stat_result = _smb_entry_stat(entry)
+                item_path = _join_browse_path(path, name)
+                items.append(
+                    ConnectorBrowseItem(
+                        kind="folder" if is_dir else "file",
+                        name=name,
+                        path=item_path,
+                        external_id=f"{location.share}:{item_path}",
+                        size_bytes=None if is_dir else _smb_stat_size(stat_result),
+                        content_type=None if is_dir else mimetypes.guess_type(name)[0],
+                        modified_at=_smb_stat_modified_at(stat_result),
+                        etag=_smb_stat_revision(stat_result),
+                        metadata={
+                            "share": location.share,
+                            **({"server": location.server} if _metadata_bool(profile, "expose_server_metadata", default=False) else {}),
+                        },
+                    )
+                )
+    except ConnectorBrowseError:
+        raise
+    except Exception as exc:  # pragma: no cover - concrete exception types are dependency-version specific
+        raise ConnectorBrowseError(f"SMB connector browse failed: {exc}") from exc
+    return sorted(items, key=lambda item: (item.kind != "folder", item.name.casefold(), item.path.casefold()))
+
+
+def _browse_s3(profile: ConnectorProfile, *, path: str, library_id: str | None, continuation_token: str | None) -> list[ConnectorBrowseItem]:
+    client = _s3_client(profile)
+    try:
+        return _browse_s3_with_client(
+            client,
+            profile=profile,
+            path=path,
+            library_id=library_id,
+            continuation_token=continuation_token,
+        )
+    finally:
+        close = getattr(client, "close", None)
+        if callable(close):
+            close()
+
+
+def _browse_s3_with_client(
+    client: Any,
+    *,
+    profile: ConnectorProfile,
+    path: str,
+    library_id: str | None,
+    continuation_token: str | None,
+) -> list[ConnectorBrowseItem]:
+    bucket = _s3_bucket(profile, library_id)
+    if not bucket:
+        try:
+            payload = client.list_buckets()
+        except Exception as exc:  # pragma: no cover - concrete exception types are dependency-version specific
+            raise ConnectorBrowseError(f"S3 connector browse failed: {exc}") from exc
+        buckets = payload.get("Buckets") if isinstance(payload, Mapping) else None
+        if not isinstance(buckets, list):
+            raise ConnectorBrowseError("S3 connector returned invalid bucket list")
+        return sorted(
+            (
+                ConnectorBrowseItem(
+                    kind="library",
+                    name=_clean(item.get("Name")) or "",
+                    path=_clean(item.get("Name")) or "",
+                    external_id=_clean(item.get("Name")),
+                    modified_at=_timestamp(item.get("CreationDate")),
+                    metadata={"bucket": _clean(item.get("Name"))},
+                )
+                for item in buckets
+                if isinstance(item, Mapping) and _clean(item.get("Name"))
+            ),
+            key=lambda item: item.name.casefold(),
+        )
+    prefix = _s3_object_key(profile, path, directory=True)
+    params: dict[str, object] = {
+        "Bucket": bucket,
+        "Prefix": prefix,
+        "Delimiter": "/",
+        "MaxKeys": _s3_max_keys(profile),
+    }
+    next_page_request = _clean(continuation_token) or _metadata_string(profile, "continuation_token")
+    if next_page_request:
+        params["ContinuationToken"] = next_page_request
+    try:
+        payload = client.list_objects_v2(**params)
+    except Exception as exc:  # pragma: no cover - concrete exception types are dependency-version specific
+        raise ConnectorBrowseError(f"S3 connector browse failed: {exc}") from exc
+    if not isinstance(payload, Mapping):
+        raise ConnectorBrowseError("S3 connector returned invalid object listing")
+    items = [
+        *_s3_prefix_items(bucket=bucket, browse_path=path, base_prefix=prefix, prefixes=payload.get("CommonPrefixes")),
+        *_s3_object_items(bucket=bucket, browse_path=path, base_prefix=prefix, objects=payload.get("Contents")),
+    ]
+    next_token = _clean(payload.get("NextContinuationToken"))
+    if next_token and items:
+        last = items[-1]
+        items[-1] = ConnectorBrowseItem(
+            kind=last.kind,
+            name=last.name,
+            path=last.path,
+            external_id=last.external_id,
+            external_url=last.external_url,
+            size_bytes=last.size_bytes,
+            content_type=last.content_type,
+            modified_at=last.modified_at,
+            etag=last.etag,
+            metadata={**dict(last.metadata), "next_continuation_token": next_token, "listing_truncated": True},
+        )
+    return sorted(items, key=lambda item: (item.kind != "folder", item.name.casefold(), item.path.casefold()))
+
+
+def _s3_client(profile: ConnectorProfile) -> Any:
+    if profile.secret_ref:
+        raise ConnectorBrowseError("Secret-ref S3 credentials need a runtime secret resolver before live browsing")
+    if profile.endpoint_url:
+        try:
+            endpoint_url = validate_outbound_http_url(
+                profile.endpoint_url,
+                label="S3 connector endpoint",
+            )
+        except OutboundHttpError as exc:
+            raise ConnectorBrowseError(str(exc)) from exc
+    else:
+        endpoint_url = None
+    try:
+        config_module = import_module("botocore.config")
+        unsigned = import_module("botocore").UNSIGNED
+    except ImportError as exc:
+        raise ConnectorBrowseUnsupported("S3 connector browsing requires the optional boto3 dependency") from exc
+    kwargs: dict[str, object] = {}
+    if endpoint_url:
+        kwargs["endpoint_url"] = endpoint_url
+    region = _metadata_string(profile, "region") or _metadata_string(profile, "aws_region")
+    if region:
+        kwargs["region_name"] = region
+    access_key = profile.username or _metadata_env(profile, "access_key_id_env") or _metadata_string(profile, "access_key_id")
+    secret_key = _profile_password(profile) or _metadata_env(profile, "secret_access_key_env")
+    session_token = _profile_token(profile) or _metadata_env(profile, "session_token_env")
+    if access_key:
+        kwargs["aws_access_key_id"] = access_key
+    if secret_key:
+        kwargs["aws_secret_access_key"] = secret_key
+    if session_token:
+        kwargs["aws_session_token"] = session_token
+    verify = _s3_verify(profile)
+    if verify is not None:
+        kwargs["verify"] = verify
+    addressing_style = _s3_addressing_style(profile)
+    config_values: dict[str, object] = {
+        "proxies": {},
+        "retries": {"mode": "standard", "max_attempts": 4},
+    }
+    if addressing_style:
+        config_values["s3"] = {"addressing_style": addressing_style}
+    if bool(access_key) != bool(secret_key):
+        raise ConnectorBrowseError("S3 connectors require both an access key and a secret key")
+    if not access_key:
+        config_values["signature_version"] = unsigned
+    kwargs["config"] = config_module.Config(**config_values)
+    try:
+        return create_pinned_s3_client(**kwargs)
+    except SdkPeerPinningError as exc:
+        raise ConnectorBrowseError(str(exc)) from exc
+    except Exception as exc:  # pragma: no cover - concrete exception types are dependency-version specific
+        raise ConnectorBrowseError(f"S3 connector could not be initialized: {exc}") from exc
+
+
+def _s3_bucket(profile: ConnectorProfile, library_id: str | None = None) -> str | None:
+    return _metadata_string(profile, "bucket") or _metadata_string(profile, "bucket_name") or _clean(library_id)
+
+
+def _s3_object_key(profile: ConnectorProfile, path: str, *, directory: bool = False) -> str:
+    base_prefix = normalize_connector_browse_path(profile.base_path or _metadata_string(profile, "base_prefix"))
+    browse_path = normalize_connector_browse_path(path)
+    key = "/".join(part for part in (base_prefix, browse_path) if part)
+    if directory and key:
+        return key.rstrip("/") + "/"
+    return key
+
+
+def _s3_prefix_items(
+    *,
+    bucket: str,
+    browse_path: str,
+    base_prefix: str,
+    prefixes: object,
+) -> list[ConnectorBrowseItem]:
+    if not isinstance(prefixes, list):
+        return []
+    items: list[ConnectorBrowseItem] = []
+    for item in prefixes:
+        if not isinstance(item, Mapping):
+            continue
+        key = _clean(item.get("Prefix"))
+        if not key:
+            continue
+        relative = _s3_relative_key(key, base_prefix=base_prefix)
+        name = _path_name(relative)
+        if not name:
+            continue
+        path = _join_browse_path(browse_path, name)
+        items.append(
+            ConnectorBrowseItem(
+                kind="folder",
+                name=name,
+                path=path,
+                external_id=f"{bucket}:{key}",
+                metadata={"bucket": bucket, "key": key},
+            )
+        )
+    return items
+
+
+def _s3_object_items(
+    *,
+    bucket: str,
+    browse_path: str,
+    base_prefix: str,
+    objects: object,
+) -> list[ConnectorBrowseItem]:
+    if not isinstance(objects, list):
+        return []
+    items: list[ConnectorBrowseItem] = []
+    for item in objects:
+        if not isinstance(item, Mapping):
+            continue
+        key = _clean(item.get("Key"))
+        if not key or key == base_prefix:
+            continue
+        relative = _s3_relative_key(key, base_prefix=base_prefix)
+        name = _path_name(relative)
+        if not name:
+            continue
+        path = _join_browse_path(browse_path, name)
+        items.append(
+            ConnectorBrowseItem(
+                kind="file",
+                name=name,
+                path=path,
+                external_id=f"{bucket}:{key}",
+                size_bytes=_int(item.get("Size")),
+                content_type=mimetypes.guess_type(name)[0],
+                modified_at=_timestamp(item.get("LastModified")),
+                etag=_clean(item.get("ETag")),
+                metadata={
+                    "bucket": bucket,
+                    "key": key,
+                    **({"storage_class": item["StorageClass"]} if "StorageClass" in item else {}),
+                },
+            )
+        )
+    return items
+
+
+def _s3_relative_key(key: str, *, base_prefix: str) -> str:
+    clean_key = key.rstrip("/")
+    clean_base = base_prefix.rstrip("/")
+    if clean_base and clean_key.startswith(f"{clean_base}/"):
+        return clean_key[len(clean_base) + 1 :]
+    return clean_key
+
+
+def _s3_max_keys(profile: ConnectorProfile) -> int:
+    configured = _int(profile.metadata.get("max_keys"))
+    if configured is None:
+        return 1000
+    return max(1, min(configured, 1000))
+
+
+def _s3_verify(profile: ConnectorProfile) -> bool | str | None:
+    try:
+        validate_connector_tls_metadata(profile.metadata)
+    except ConnectorDeploymentConfigurationError as exc:
+        raise ConnectorBrowseError(str(exc)) from exc
+    ca_bundle = _metadata_string(profile, "ca_bundle")
+    if ca_bundle:
+        try:
+            return connector_ca_bundle_path(ca_bundle)
+        except ConnectorDeploymentConfigurationError as exc:
+            raise ConnectorBrowseError(str(exc)) from exc
+    if "verify_tls" in profile.metadata:
+        return _metadata_bool(profile, "verify_tls", default=True)
+    if "tls_verify" in profile.metadata:
+        return _metadata_bool(profile, "tls_verify", default=True)
+    return None
+
+
+def _s3_addressing_style(profile: ConnectorProfile) -> str | None:
+    style = _metadata_string(profile, "addressing_style")
+    if style in {"path", "virtual", "auto"}:
+        return style
+    if _metadata_bool(profile, "path_style", default=False):
+        return "path"
+    return None
+
+
+def _seafile_headers(profile: ConnectorProfile) -> dict[str, str]:
+    token = _seafile_token(profile)
+    return {"Authorization": f"Token {token}", "Accept": "application/json"}
+
+
+def _seafile_token(profile: ConnectorProfile) -> str:
+    token = _profile_token(profile)
+    if token:
+        return token
+    password = _profile_password(profile)
+    if profile.username and password:
+        payload = _request_json(
+            "POST",
+            _seafile_url(profile, "api2/auth-token/"),
+            data={"username": profile.username, "password": password},
+        )
+        if not isinstance(payload, Mapping) or not _clean(payload.get("token")):
+            raise ConnectorBrowseError("Seafile did not return an account token")
+        return _clean(payload.get("token")) or ""
+    if profile.secret_ref:
+        raise ConnectorBrowseError("Secret-ref Seafile credentials need a runtime secret resolver before live browsing")
+    raise ConnectorBrowseError("Seafile connector profiles require token credentials or username plus password credentials")
+
+
+def _seafile_url(profile: ConnectorProfile, suffix: str) -> str:
+    if not profile.endpoint_url:
+        raise ConnectorBrowseError("Seafile connector profile does not define endpoint_url")
+    return urljoin(profile.endpoint_url.rstrip("/") + "/", suffix.lstrip("/"))
+
+
+def _request_json(
+    method: str,
+    url: str,
+    *,
+    headers: Mapping[str, str] | None = None,
+    params: Mapping[str, str] | None = None,
+    data: Mapping[str, str] | None = None,
+) -> object:
+    try:
+        response = request_connector_bytes(
+            method,
+            url,
+            headers=dict(headers or {}),
+            params=params,
+            data=data,
+            timeout=15.0,
+            label="Seafile API",
+        )
+    except ConnectorHttpError as exc:
+        raise ConnectorBrowseError(f"Connector browse failed: {exc}") from exc
+    if response.status_code in {401, 403}:
+        raise ConnectorBrowseError("Connector credentials were rejected")
+    if response.status_code not in {200, 201}:
+        raise ConnectorBrowseError(f"Connector browse failed with HTTP {response.status_code}")
+    try:
+        return json.loads(response.content)
+    except (UnicodeDecodeError, ValueError) as exc:
+        raise ConnectorBrowseError("Connector returned invalid JSON") from exc
+
+
+def _seafile_repo_and_path(*, path: str, library_id: str | None) -> tuple[str | None, str]:
+    repo_id = _clean(library_id)
+    if repo_id:
+        return repo_id, path
+    if not path:
+        return None, ""
+    first, _, rest = path.partition("/")
+    return first, rest
+
+
+def _seafile_library_item(value: Mapping[str, Any]) -> ConnectorBrowseItem:
+    repo_id = _clean(value.get("id") or value.get("repo_id"))
+    name = _clean(value.get("name") or value.get("repo_name") or repo_id)
+    if not repo_id or not name:
+        raise ConnectorBrowseError("Seafile library entries require id and name")
+    return ConnectorBrowseItem(
+        kind="library",
+        name=name,
+        path=repo_id,
+        external_id=repo_id,
+        size_bytes=_int(value.get("size") or value.get("repo_size")),
+        modified_at=_timestamp(value.get("mtime")),
+        metadata={
+            key: value[key]
+            for key in ("type", "permission", "encrypted", "owner", "file_count")
+            if key in value
+        },
+    )
+
+
+def _seafile_directory_item(value: Mapping[str, Any], *, parent_path: str) -> ConnectorBrowseItem:
+    name = _clean(value.get("name") or value.get("obj_name"))
+    if not name:
+        raise ConnectorBrowseError("Seafile directory entries require name")
+    item_type = str(value.get("type") or ("dir" if value.get("is_dir") else "file")).casefold()
+    kind = "folder" if item_type in {"dir", "folder"} else "file"
+    path = _join_browse_path(parent_path, name)
+    content_type = None if kind == "folder" else mimetypes.guess_type(name)[0]
+    return ConnectorBrowseItem(
+        kind=kind,
+        name=name,
+        path=path,
+        external_id=_clean(value.get("id") or value.get("obj_id")),
+        size_bytes=None if kind == "folder" else _int(value.get("size")),
+        content_type=content_type,
+        modified_at=_timestamp(value.get("mtime") or value.get("modified")),
+        etag=_clean(value.get("id") or value.get("obj_id")),
+        metadata={
+            key: value[key]
+            for key in ("permission", "modifier_email", "modifier_name")
+            if key in value
+        },
+    )
+
+
+def _static_listing(profile: ConnectorProfile, *, path: str, library_id: str | None) -> list[ConnectorBrowseItem] | None:
+    listing = profile.metadata.get("static_listing")
+    if listing is None:
+        return None
+    if isinstance(listing, list):
+        raw_items = listing if path == "" else []
+    elif isinstance(listing, Mapping):
+        key = library_id or path
+        raw_items = listing.get(key)
+        if raw_items is None and key == "":
+            raw_items = listing.get("/")
+    else:
+        raise ConnectorBrowseError("Connector static_listing metadata must be a list or object")
+    if raw_items is None:
+        return []
+    if not isinstance(raw_items, list):
+        raise ConnectorBrowseError("Connector static_listing entries must be lists")
+    return sorted(
+        [_static_item(item, parent_path=path) for item in raw_items if isinstance(item, Mapping)],
+        key=lambda item: (item.kind != "library", item.kind != "folder", item.name.casefold(), item.path.casefold()),
+    )
+
+
+def _static_item(value: Mapping[str, Any], *, parent_path: str) -> ConnectorBrowseItem:
+    kind = str(value.get("kind") or "file").strip().casefold()
+    if kind not in {"library", "folder", "file"}:
+        raise ConnectorBrowseError("Connector browse items must be library, folder or file")
+    name = str(value.get("name") or value.get("path") or "").strip()
+    if not name:
+        raise ConnectorBrowseError("Connector browse items require name")
+    path = normalize_connector_browse_path(value.get("path"))
+    if not path:
+        path = _join_browse_path(parent_path, name)
+    return ConnectorBrowseItem(
+        kind=kind,
+        name=name,
+        path=path,
+        external_id=_clean(value.get("external_id")),
+        external_url=_clean(value.get("external_url")),
+        size_bytes=_int(value.get("size_bytes")),
+        content_type=_clean(value.get("content_type")),
+        modified_at=_clean(value.get("modified_at")),
+        etag=_clean(value.get("etag")),
+        metadata=value.get("metadata") if isinstance(value.get("metadata"), Mapping) else {},
+    )
+
+
+def _webdav_url(root_url: str, path: str) -> str:
+    base = root_url if root_url.endswith("/") else root_url + "/"
+    if not path:
+        return base
+    quoted = "/".join(quote(part, safe="") for part in path.split("/") if part)
+    return urljoin(base, quoted + "/")
+
+
+def _url_path_root(root_url: str) -> str:
+    path = unquote(urlsplit(root_url).path or "/")
+    return path if path.endswith("/") else path + "/"
+
+
+def _relative_href_path(root_path: str, href: str) -> str:
+    href_path = unquote(urlsplit(href).path or href).strip()
+    if href_path.startswith(root_path):
+        return normalize_connector_browse_path(href_path[len(root_path):])
+    return normalize_connector_browse_path(href_path.rsplit("/", 1)[-1])
+
+
+def _webdav_prop(response: ET.Element) -> ET.Element:
+    prop = response.find("{DAV:}propstat/{DAV:}prop")
+    if prop is not None:
+        return prop
+    prop = response.find(".//{DAV:}prop")
+    return prop if prop is not None else ET.Element("prop")
+
+
+def _webdav_display_name(prop: ET.Element | None) -> str | None:
+    return _clean(_text(prop, "{DAV:}displayname"))
+
+
+def _text(prop: ET.Element | None, tag: str) -> str | None:
+    if prop is None:
+        return None
+    child = prop.find(tag)
+    return child.text.strip() if child is not None and child.text else None
+
+
+def _http_date(value: str | None) -> str | None:
+    if not value:
+        return None
+    try:
+        return parsedate_to_datetime(value).isoformat()
+    except (TypeError, ValueError):
+        return value
+
+
+def _timestamp(value: object) -> str | None:
+    number = _int(value)
+    if number is None:
+        return _clean(value)
+    return datetime.fromtimestamp(number, tz=timezone.utc).isoformat()
+
+
+def _metadata_string(profile: ConnectorProfile, key: str) -> str | None:
+    return _clean(profile.metadata.get(key))
+
+
+def _metadata_bool(profile: ConnectorProfile, key: str, *, default: bool = False) -> bool:
+    value = profile.metadata.get(key)
+    if value is None:
+        return default
+    if isinstance(value, bool):
+        return value
+    return str(value).strip().casefold() in {"1", "true", "yes", "on"}
+
+
+def _metadata_env(profile: ConnectorProfile, key: str) -> str | None:
+    env_name = _metadata_string(profile, key)
+    if not env_name:
+        return None
+    return _env_required(env_name, profile)
+
+
+def _env_required(name: str, profile: ConnectorProfile) -> str:
+    try:
+        return connector_secret_env_value(name, source_kind=profile.source_kind)
+    except ConnectorDeploymentConfigurationError as exc:
+        raise ConnectorBrowseError(f"Connector profile {profile.id}: {exc}") from exc
+
+
+def normalize_connector_browse_path(value: object) -> str:
+    if value is None:
+        return ""
+    path = str(value).replace("\\", "/").strip().strip("/")
+    parts = [part for part in path.split("/") if part and part not in {"."}]
+    if any(part == ".." for part in parts):
+        raise ConnectorBrowseError("Connector browse paths cannot contain parent directory segments")
+    return "/".join(parts)
+
+
+def _join_browse_path(parent: str, name: str) -> str:
+    child = normalize_connector_browse_path(name)
+    if not parent:
+        return child
+    return f"{parent.rstrip('/')}/{child}"
+
+
+def _path_name(path: str) -> str:
+    return path.rstrip("/").rsplit("/", 1)[-1]
+
+
+def _int(value: object) -> int | None:
+    if value is None or value == "":
+        return None
+    try:
+        return int(value)
+    except (TypeError, ValueError):
+        return None
+
+
+def _clean(value: object) -> str | None:
+    if value is None:
+        return None
+    text = str(value).strip()
+    return text or None
+
+
+@dataclass(frozen=True, slots=True)
+class _SmbLocation:
+    server: str
+    share: str
+    port: int
+    root_path: str = ""
+
+
+def _smb_location(profile: ConnectorProfile) -> _SmbLocation:
+    if not profile.endpoint_url:
+        raise ConnectorBrowseError("SMB connector profile does not define endpoint_url")
+    parsed = urlsplit(profile.endpoint_url)
+    if parsed.scheme.casefold() != "smb":
+        raise ConnectorBrowseError("SMB connector endpoint_url must use smb://")
+    server = _clean(parsed.hostname)
+    if not server:
+        raise ConnectorBrowseError("SMB connector endpoint_url must include a server")
+    port = parsed.port or _int(profile.metadata.get("port")) or 445
+    try:
+        validate_outbound_host(server, port=port, label="SMB connector endpoint")
+    except OutboundHttpError as exc:
+        raise ConnectorBrowseError(str(exc)) from exc
+    path_parts = [part for part in unquote(parsed.path or "").strip("/").split("/") if part]
+    if not path_parts:
+        raise ConnectorBrowseError("SMB connector endpoint_url must include a share name")
+    root_parts = path_parts[1:]
+    if profile.base_path:
+        root_parts.extend(normalize_connector_browse_path(profile.base_path).split("/"))
+    return _SmbLocation(
+        server=server,
+        share=path_parts[0],
+        port=port,
+        root_path=normalize_connector_browse_path("/".join(root_parts)),
+    )
+
+
+def _smb_unc_path(location: _SmbLocation, path: str) -> str:
+    parts = [part for part in (location.root_path, normalize_connector_browse_path(path)) if part]
+    suffix = "\\".join(part.replace("/", "\\") for part in parts)
+    base = f"\\\\{location.server}\\{location.share}"
+    return f"{base}\\{suffix}" if suffix else base
+
+
+def _smb_client_kwargs(profile: ConnectorProfile, location: _SmbLocation) -> dict[str, object]:
+    kwargs: dict[str, object] = {
+        "port": location.port,
+        "connection_cache": pinned_smb_connection_cache(),
+        "require_signing": _metadata_bool(profile, "require_signing", default=True),
+        "auth_protocol": _metadata_string(profile, "auth_protocol") or "ntlm",
+    }
+    if "encrypt" in profile.metadata:
+        kwargs["encrypt"] = _metadata_bool(profile, "encrypt", default=False)
+    password = _profile_password(profile)
+    token = _profile_token(profile)
+    if profile.username and password:
+        kwargs["username"] = profile.username
+        kwargs["password"] = password
+    elif token:
+        raise ConnectorBrowseError("SMB connector profiles do not support bearer-token credentials")
+    elif profile.credential_mode.casefold() not in {"", "none", "anonymous"} and profile.secret_ref:
+        raise ConnectorBrowseError("Secret-ref SMB credentials need a runtime secret resolver before live browsing")
+    return kwargs
+
+
+def _profile_password(profile: ConnectorProfile) -> str | None:
+    if profile.password_value:
+        return profile.password_value
+    if profile.password_env:
+        return _env_required(profile.password_env, profile)
+    return None
+
+
+def _profile_token(profile: ConnectorProfile) -> str | None:
+    if profile.token_value:
+        return profile.token_value
+    if profile.token_env:
+        return _env_required(profile.token_env, profile)
+    return None
+
+
+def _smbclient_module() -> Any:
+    try:
+        return install_pinned_smb_transport(import_module("smbclient"))
+    except ImportError as exc:
+        raise ConnectorBrowseUnsupported("SMB connector browsing requires the optional smbprotocol dependency") from exc
+    except SdkPeerPinningError as exc:
+        raise ConnectorBrowseUnsupported(str(exc)) from exc
+
+
+def _smb_entry_stat(entry: object) -> object | None:
+    try:
+        return entry.stat()  # type: ignore[attr-defined]
+    except Exception:
+        return None
+
+
+def _smb_stat_size(stat_result: object | None) -> int | None:
+    return _int(getattr(stat_result, "st_size", None))
+
+
+def _smb_stat_modified_at(stat_result: object | None) -> str | None:
+    value = getattr(stat_result, "st_mtime", None)
+    if value is None:
+        return None
+    try:
+        return datetime.fromtimestamp(float(value), tz=timezone.utc).isoformat()
+    except (TypeError, ValueError, OSError, OverflowError):
+        return None
+
+
+def _smb_stat_revision(stat_result: object | None) -> str | None:
+    mtime_ns = getattr(stat_result, "st_mtime_ns", None)
+    size = getattr(stat_result, "st_size", None)
+    if mtime_ns is not None:
+        return f"{mtime_ns}:{size or 0}"
+    modified = getattr(stat_result, "st_mtime", None)
+    if modified is not None:
+        return f"{modified}:{size or 0}"
+    return None

src/govoplan_files/backend/storage/connector_credential_deletion.py

@@ -0,0 +1,337 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+from sqlalchemy import inspect
+from sqlalchemy.orm import Session
+
+from govoplan_core.audit.logging import audit_event
+from govoplan_files.backend.db.models import FileConnectorCredential, FileConnectorProfile
+
+
+@dataclass(frozen=True, slots=True)
+class ConnectorCredentialDeletionResult:
+    changed: bool
+    affected_profiles: tuple[FileConnectorProfile, ...] = ()
+
+
+def delete_connector_credential_row(
+    session: Session,
+    row: FileConnectorCredential,
+    *,
+    deletion_reason: str,
+    user_id: str | None = None,
+    api_key_id: str | None = None,
+) -> ConnectorCredentialDeletionResult:
+    """Scrub a credential tombstone and disable every profile that used it.
+
+    ``secret_ref`` predates a Files-owned secret-provider contract.  It may be
+    shared or deployment-owned, so it is detached locally and explicitly
+    audited without ever being passed to a provider delete operation.
+    """
+
+    dependent_profiles = (
+        tuple(
+            session.query(FileConnectorProfile)
+            .filter(FileConnectorProfile.credential_profile_id == row.id)
+            .order_by(FileConnectorProfile.id.asc())
+            .all()
+        )
+        if inspect(session.get_bind()).has_table(FileConnectorProfile.__tablename__)
+        else ()
+    )
+    affected_profiles: list[FileConnectorProfile] = []
+    for profile in dependent_profiles:
+        if _delete_connector_profile_row(
+            session,
+            profile,
+            deletion_reason="credential_deleted",
+            user_id=user_id,
+            api_key_id=api_key_id,
+        ):
+            affected_profiles.append(profile)
+
+    deleted_secret_kinds = _encrypted_secret_kinds(row)
+    removed_reference_kinds = _credential_reference_kinds(row)
+    removed_metadata = bool(row.metadata_)
+    changed = _credential_row_requires_deletion(row)
+    if changed:
+        _scrub_credential_row(row, user_id=user_id)
+        session.add(row)
+        _audit_credential_deletion(
+            session,
+            row,
+            deletion_reason=deletion_reason,
+            deleted_secret_kinds=deleted_secret_kinds,
+            removed_reference_kinds=removed_reference_kinds,
+            removed_metadata=removed_metadata,
+            affected_profile_count=len(affected_profiles),
+            user_id=user_id,
+            api_key_id=api_key_id,
+        )
+    session.flush()
+    return ConnectorCredentialDeletionResult(
+        changed=changed or bool(affected_profiles),
+        affected_profiles=tuple(affected_profiles),
+    )
+
+
+def delete_connector_profile_row(
+    session: Session,
+    row: FileConnectorProfile,
+    *,
+    deletion_reason: str,
+    user_id: str | None = None,
+    api_key_id: str | None = None,
+) -> bool:
+    changed = _delete_connector_profile_row(
+        session,
+        row,
+        deletion_reason=deletion_reason,
+        user_id=user_id,
+        api_key_id=api_key_id,
+    )
+    session.flush()
+    return changed
+
+
+def delete_connector_credentials_for_retirement(session: Session) -> int:
+    """Scrub and audit stored connector material before destructive retirement.
+
+    Legacy external references are detached and audited as non-owned. Files
+    never sends those arbitrary references to a provider delete operation.
+    """
+
+    inspector = inspect(session.get_bind())
+    profiles = (
+        session.query(FileConnectorProfile).order_by(FileConnectorProfile.id.asc()).all()
+        if inspector.has_table(FileConnectorProfile.__tablename__)
+        else []
+    )
+    credentials = (
+        session.query(FileConnectorCredential).order_by(FileConnectorCredential.id.asc()).all()
+        if inspector.has_table(FileConnectorCredential.__tablename__)
+        else []
+    )
+    deleted = 0
+    for profile in profiles:
+        if not _profile_row_has_credential_material(profile):
+            continue
+        if _delete_connector_profile_row(
+            session,
+            profile,
+            deletion_reason="module_data_retired",
+        ):
+            deleted += 1
+    for credential in credentials:
+        if not _credential_row_has_material(credential):
+            continue
+        result = delete_connector_credential_row(
+            session,
+            credential,
+            deletion_reason="module_data_retired",
+        )
+        if result.changed:
+            deleted += 1
+    session.flush()
+    return deleted
+
+
+def _delete_connector_profile_row(
+    session: Session,
+    row: FileConnectorProfile,
+    *,
+    deletion_reason: str,
+    user_id: str | None = None,
+    api_key_id: str | None = None,
+) -> bool:
+    deleted_secret_kinds = _encrypted_secret_kinds(row)
+    removed_reference_kinds = _profile_reference_kinds(row)
+    removed_metadata = bool(row.metadata_)
+    changed = _profile_row_requires_deletion(row)
+    if not changed:
+        return False
+    _scrub_profile_row(row, user_id=user_id)
+    session.add(row)
+    _audit_profile_deletion(
+        session,
+        row,
+        deletion_reason=deletion_reason,
+        deleted_secret_kinds=deleted_secret_kinds,
+        removed_reference_kinds=removed_reference_kinds,
+        removed_metadata=removed_metadata,
+        user_id=user_id,
+        api_key_id=api_key_id,
+    )
+    return True
+
+
+def _scrub_credential_row(row: FileConnectorCredential, *, user_id: str | None) -> None:
+    row.enabled = False
+    row.credential_mode = "none"
+    row.username = None
+    row.password_encrypted = None
+    row.token_encrypted = None
+    row.password_env = None
+    row.token_env = None
+    row.secret_ref = None
+    row.metadata_ = {}
+    row.updated_by_user_id = user_id
+
+
+def _scrub_profile_row(row: FileConnectorProfile, *, user_id: str | None) -> None:
+    row.enabled = False
+    row.credential_profile_id = None
+    row.credential_mode = "none"
+    row.username = None
+    row.password_encrypted = None
+    row.token_encrypted = None
+    row.password_env = None
+    row.token_env = None
+    row.secret_ref = None
+    row.metadata_ = {}
+    row.updated_by_user_id = user_id
+
+
+def _credential_row_requires_deletion(row: FileConnectorCredential) -> bool:
+    return bool(row.enabled or _credential_row_has_material(row))
+
+
+def _profile_row_requires_deletion(row: FileConnectorProfile) -> bool:
+    return bool(row.enabled or _profile_row_has_credential_material(row))
+
+
+def _credential_row_has_material(row: FileConnectorCredential) -> bool:
+    return bool(
+        row.username
+        or row.password_encrypted
+        or row.token_encrypted
+        or row.password_env
+        or row.token_env
+        or row.secret_ref
+        or row.metadata_
+        or row.credential_mode not in {"", "none", "anonymous"}
+    )
+
+
+def _profile_row_has_credential_material(row: FileConnectorProfile) -> bool:
+    return bool(
+        row.credential_profile_id
+        or row.username
+        or row.password_encrypted
+        or row.token_encrypted
+        or row.password_env
+        or row.token_env
+        or row.secret_ref
+        or row.metadata_
+        or row.credential_mode not in {"", "none", "anonymous"}
+    )
+
+
+def _encrypted_secret_kinds(row: FileConnectorCredential | FileConnectorProfile) -> list[str]:
+    kinds: list[str] = []
+    if row.password_encrypted:
+        kinds.append("password")
+    if row.token_encrypted:
+        kinds.append("token")
+    return kinds
+
+
+def _credential_reference_kinds(row: FileConnectorCredential | FileConnectorProfile) -> list[str]:
+    kinds: list[str] = []
+    if row.password_env:
+        kinds.append("password_env")
+    if row.token_env:
+        kinds.append("token_env")
+    if row.secret_ref:
+        kinds.append("unowned_external_secret_ref")
+    return kinds
+
+
+def _profile_reference_kinds(row: FileConnectorProfile) -> list[str]:
+    kinds = _credential_reference_kinds(row)
+    if row.credential_profile_id:
+        kinds.append("credential_profile")
+    return kinds
+
+
+def _storage_backend(deleted_secret_kinds: list[str], removed_reference_kinds: list[str]) -> str:
+    if "unowned_external_secret_ref" in removed_reference_kinds:
+        return "unowned_external_reference_detached"
+    if deleted_secret_kinds:
+        return "encrypted_database"
+    if removed_reference_kinds:
+        return "reference_only"
+    return "none"
+
+
+def _audit_credential_deletion(
+    session: Session,
+    row: FileConnectorCredential,
+    *,
+    deletion_reason: str,
+    deleted_secret_kinds: list[str],
+    removed_reference_kinds: list[str],
+    removed_metadata: bool,
+    affected_profile_count: int,
+    user_id: str | None,
+    api_key_id: str | None,
+) -> None:
+    audit_event(
+        session,
+        tenant_id=row.tenant_id,
+        scope=_audit_scope(row.scope_type),
+        user_id=user_id,
+        api_key_id=api_key_id,
+        action="files.connector_credential_deleted",
+        object_type="file_connector_credential",
+        object_id=row.id,
+        details={
+            "scope_type": row.scope_type,
+            "scope_id": row.scope_id,
+            "provider": row.provider,
+            "storage_backend": _storage_backend(deleted_secret_kinds, removed_reference_kinds),
+            "deleted_secret_kinds": deleted_secret_kinds,
+            "removed_reference_kinds": removed_reference_kinds,
+            "removed_metadata": removed_metadata,
+            "affected_profile_count": affected_profile_count,
+            "deletion_reason": deletion_reason,
+        },
+    )
+
+
+def _audit_profile_deletion(
+    session: Session,
+    row: FileConnectorProfile,
+    *,
+    deletion_reason: str,
+    deleted_secret_kinds: list[str],
+    removed_reference_kinds: list[str],
+    removed_metadata: bool,
+    user_id: str | None,
+    api_key_id: str | None,
+) -> None:
+    audit_event(
+        session,
+        tenant_id=row.tenant_id,
+        scope=_audit_scope(row.scope_type),
+        user_id=user_id,
+        api_key_id=api_key_id,
+        action="files.connector_profile_deleted",
+        object_type="file_connector_profile",
+        object_id=row.id,
+        details={
+            "scope_type": row.scope_type,
+            "scope_id": row.scope_id,
+            "provider": row.provider,
+            "storage_backend": _storage_backend(deleted_secret_kinds, removed_reference_kinds),
+            "deleted_secret_kinds": deleted_secret_kinds,
+            "removed_reference_kinds": removed_reference_kinds,
+            "removed_metadata": removed_metadata,
+            "deletion_reason": deletion_reason,
+        },
+    )
+
+
+def _audit_scope(scope_type: str) -> str:
+    return "system" if scope_type == "system" else "tenant"

src/govoplan_files/backend/storage/connector_credential_store.py

@@ -0,0 +1,540 @@
+from __future__ import annotations
+
+from collections.abc import Mapping
+from dataclasses import dataclass
+from typing import Any
+
+from sqlalchemy.orm import Session
+from sqlalchemy import inspect
+
+from govoplan_core.core.policy import normalize_policy_scope_type, policy_source_path
+from govoplan_core.security.credential_envelopes import (
+    CredentialAccessContext,
+    CredentialEnvelope,
+    CredentialEnvelopeError,
+    ResolvedCredentialEnvelope,
+    list_credential_envelopes,
+    resolve_credential_envelope,
+)
+from govoplan_core.security.secrets import decrypt_secret, encrypt_secret
+from govoplan_files.backend.db.models import FileConnectorCredential
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.connector_deployment import reject_api_controlled_deployment_references
+from govoplan_files.backend.storage.connector_policy import ConnectorPolicySource, connector_policy_sources_from_payload
+from govoplan_files.backend.storage.connector_profiles import supported_connector_providers
+
+CORE_CREDENTIAL_ENVELOPE_PREFIX = "credential-envelope:"
+
+
+@dataclass(frozen=True, slots=True)
+class ConnectorCredential:
+    id: str
+    label: str
+    scope_type: str
+    scope_id: str | None = None
+    provider: str | None = None
+    enabled: bool = True
+    credential_mode: str = "none"
+    username: str | None = None
+    password_env: str | None = None
+    token_env: str | None = None
+    secret_ref: str | None = None
+    password_value: str | None = None
+    token_value: str | None = None
+    policy_sources: tuple[ConnectorPolicySource, ...] = ()
+    metadata: Mapping[str, Any] | None = None
+    source_kind: str = "database"
+    has_secret: bool = False
+
+    @property
+    def source_path(self) -> str:
+        return policy_source_path(self.scope_type, self.scope_id)
+
+    @property
+    def credential_secret_source(self) -> str | None:
+        if self.secret_ref:
+            return "secret_ref"
+        if self.password_value or self.token_value:
+            return "stored"
+        if self.token_env:
+            return "token_env"
+        if self.password_env:
+            return "password_env"
+        return None
+
+    @property
+    def credentials_configured(self) -> bool:
+        if not self.enabled:
+            return False
+        if self.credential_mode.casefold() in {"", "none", "anonymous"}:
+            return True
+        # Environment references are deliberately unavailable to API-managed
+        # credential rows. Legacy rows remain visible but fail closed.
+        return bool(self.has_secret or self.secret_ref or self.password_value or self.token_value)
+
+    def to_response(self) -> dict[str, Any]:
+        return {
+            "id": self.id,
+            "label": self.label,
+            "provider": self.provider,
+            "enabled": self.enabled,
+            "scope_type": self.scope_type,
+            "scope_id": self.scope_id,
+            "source_path": self.source_path,
+            "credential_mode": self.credential_mode,
+            "credential_secret_source": self.credential_secret_source,
+            "credentials_configured": self.credentials_configured,
+            "username": self.username,
+            "policy_sources": [_policy_source_response(source) for source in self.policy_sources],
+            "metadata": dict(self.metadata or {}),
+            "source_kind": self.source_kind,
+        }
+
+
+def list_database_connector_credentials(
+    session: Session,
+    *,
+    tenant_id: str,
+    include_disabled: bool = False,
+) -> list[ConnectorCredential]:
+    local = [
+        connector_credential_from_row(row)
+        for row in list_connector_credential_rows(
+            session,
+            tenant_id=tenant_id,
+            include_disabled=include_disabled,
+        )
+    ]
+    return [
+        *local,
+        *list_reusable_connector_credentials(
+            session,
+            tenant_id=tenant_id,
+            include_disabled=include_disabled,
+        ),
+    ]
+
+
+def reusable_credential_reference(credential_id: str) -> str:
+    return f"{CORE_CREDENTIAL_ENVELOPE_PREFIX}{credential_id}"
+
+
+def reusable_credential_id(credential_ref: str | None) -> str | None:
+    if not credential_ref or not credential_ref.startswith(CORE_CREDENTIAL_ENVELOPE_PREFIX):
+        return None
+    value = credential_ref.removeprefix(CORE_CREDENTIAL_ENVELOPE_PREFIX).strip()
+    return value or None
+
+
+def file_credential_context(
+    *,
+    tenant_id: str,
+    profile_id: str | None = None,
+    scope_type: str = "tenant",
+    scope_id: str | None = None,
+    administrative: bool = False,
+) -> CredentialAccessContext:
+    return CredentialAccessContext(
+        tenant_id=tenant_id,
+        user_id=scope_id if scope_type == "user" else None,
+        group_ids=frozenset({scope_id}) if scope_type == "group" and scope_id else frozenset(),
+        target_scope_type=scope_type,
+        target_scope_id=scope_id or tenant_id,
+        module_id="files",
+        server_ref=f"files:{profile_id}" if profile_id else None,
+        administrative=administrative,
+    )
+
+
+def list_reusable_connector_credentials(
+    session: Session,
+    *,
+    tenant_id: str,
+    include_disabled: bool = False,
+) -> list[ConnectorCredential]:
+    if not inspect(session.get_bind()).has_table(CredentialEnvelope.__tablename__):
+        return []
+    context = file_credential_context(tenant_id=tenant_id, administrative=True)
+    return [
+        connector_credential_from_envelope(row)
+        for row in list_credential_envelopes(
+            session,
+            context=context,
+            include_inactive=include_disabled,
+        )
+    ]
+
+
+def resolve_reusable_connector_credential(
+    session: Session,
+    *,
+    tenant_id: str,
+    credential_ref: str,
+    profile_id: str,
+    scope_type: str,
+    scope_id: str | None,
+) -> ConnectorCredential:
+    credential_id = reusable_credential_id(credential_ref)
+    if credential_id is None:
+        raise FileStorageError("Reusable credential reference is invalid")
+    try:
+        resolved = resolve_credential_envelope(
+            session,
+            credential_id=credential_id,
+            context=file_credential_context(
+                tenant_id=tenant_id,
+                profile_id=profile_id,
+                scope_type=scope_type,
+                scope_id=scope_id,
+            ),
+        )
+    except CredentialEnvelopeError as exc:
+        raise FileStorageError("Reusable credential is unavailable to this file connection") from exc
+    return connector_credential_from_resolved_envelope(
+        resolved,
+        scope_type=scope_type,
+        scope_id=scope_id,
+    )
+
+
+def connector_credential_from_envelope(row: CredentialEnvelope) -> ConnectorCredential:
+    return ConnectorCredential(
+        id=reusable_credential_reference(row.id),
+        label=row.name,
+        scope_type=row.scope_type,
+        scope_id=row.scope_id,
+        enabled=row.is_active,
+        credential_mode=_envelope_credential_mode(row.credential_kind, row.secret_keys),
+        username=_clean_public_value(row.public_data, "username"),
+        source_kind="credential_envelope",
+        has_secret=bool(row.secret_data_encrypted),
+        metadata={
+            "credential_envelope_id": row.id,
+            "credential_kind": row.credential_kind,
+            "allowed_modules": list(row.allowed_modules or []),
+            "allowed_server_refs": list(row.allowed_server_refs or []),
+            "inherit_to_lower_scopes": bool(row.inherit_to_lower_scopes),
+            "revision": row.revision,
+        },
+    )
+
+
+def connector_credential_from_resolved_envelope(
+    row: ResolvedCredentialEnvelope,
+    *,
+    scope_type: str,
+    scope_id: str | None,
+) -> ConnectorCredential:
+    return ConnectorCredential(
+        id=reusable_credential_reference(row.id),
+        label=row.name,
+        scope_type=scope_type,
+        scope_id=scope_id,
+        enabled=True,
+        credential_mode=_envelope_credential_mode(row.credential_kind, row.secret_data),
+        username=_clean_public_value(row.public_data, "username"),
+        password_value=_first_secret(row.secret_data, "password", "secret"),
+        token_value=_first_secret(
+            row.secret_data,
+            "access_token",
+            "bearer_token",
+            "token",
+            "api_key",
+        ),
+        source_kind="credential_envelope",
+        has_secret=bool(row.secret_data),
+        metadata={
+            "credential_envelope_id": row.id,
+            "credential_kind": row.credential_kind,
+            "inherit_to_lower_scopes": True,
+            "revision": row.revision,
+        },
+    )
+
+
+def list_connector_credential_rows(
+    session: Session,
+    *,
+    tenant_id: str,
+    include_disabled: bool = False,
+) -> list[FileConnectorCredential]:
+    query = session.query(FileConnectorCredential).filter(
+        (FileConnectorCredential.scope_type == "system")
+        | (FileConnectorCredential.tenant_id == tenant_id)
+    )
+    if not include_disabled:
+        query = query.filter(FileConnectorCredential.enabled.is_(True))
+    return query.order_by(FileConnectorCredential.scope_type.asc(), FileConnectorCredential.label.asc()).all()
+
+
+def connector_credential_from_row(row: FileConnectorCredential) -> ConnectorCredential:
+    policy_sources = []
+    if row.policy:
+        policy_sources = connector_policy_sources_from_payload({
+            "scope_type": row.scope_type,
+            "scope_id": row.scope_id,
+            "label": row.label,
+            "policy": row.policy,
+        })
+    return ConnectorCredential(
+        id=row.id,
+        label=row.label,
+        scope_type=row.scope_type,
+        scope_id=row.scope_id,
+        provider=row.provider,
+        enabled=row.enabled,
+        credential_mode=row.credential_mode,
+        username=row.username,
+        password_env=row.password_env,
+        token_env=row.token_env,
+        secret_ref=row.secret_ref,
+        password_value=decrypt_secret(row.password_encrypted),
+        token_value=decrypt_secret(row.token_encrypted),
+        policy_sources=tuple(policy_sources),
+        metadata=dict(row.metadata_ or {}),
+    )
+
+
+def get_connector_credential_row(
+    session: Session,
+    *,
+    tenant_id: str,
+    credential_id: str,
+    include_disabled: bool = False,
+) -> FileConnectorCredential:
+    row = session.get(FileConnectorCredential, credential_id)
+    if row is None or (row.scope_type != "system" and row.tenant_id != tenant_id):
+        raise FileStorageError("Connector credential not found")
+    if not include_disabled and not row.enabled:
+        raise FileStorageError("Connector credential not found")
+    return row
+
+
+def credential_rows_by_id(
+    session: Session,
+    *,
+    tenant_id: str,
+    credential_ids: set[str],
+    include_disabled: bool = False,
+) -> dict[str, FileConnectorCredential]:
+    if not credential_ids:
+        return {}
+    rows = session.query(FileConnectorCredential).filter(FileConnectorCredential.id.in_(credential_ids)).all()
+    result: dict[str, FileConnectorCredential] = {}
+    for row in rows:
+        if row.scope_type != "system" and row.tenant_id != tenant_id:
+            continue
+        if not include_disabled and not row.enabled:
+            continue
+        result[row.id] = row
+    return result
+
+
+def create_connector_credential_row(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str | None,
+    credential_id: str,
+    label: str,
+    scope_type: str,
+    scope_id: str | None = None,
+    provider: str | None = None,
+    enabled: bool = True,
+    credential_mode: str = "none",
+    username: str | None = None,
+    password: str | None = None,
+    token: str | None = None,
+    password_env: str | None = None,
+    token_env: str | None = None,
+    secret_ref: str | None = None,
+    policy: Mapping[str, Any] | None = None,
+    metadata: Mapping[str, Any] | None = None,
+) -> FileConnectorCredential:
+    reject_api_controlled_deployment_references(
+        password_env=password_env,
+        token_env=token_env,
+        secret_ref=secret_ref,
+        metadata=metadata,
+    )
+    clean_id = _normalize_id(credential_id)
+    if session.get(FileConnectorCredential, clean_id) is not None:
+        raise FileStorageError(f"Connector credential already exists: {clean_id}")
+    clean_scope_type, clean_scope_id, row_tenant_id = _normalize_scope(tenant_id=tenant_id, scope_type=scope_type, scope_id=scope_id)
+    row = FileConnectorCredential(
+        id=clean_id,
+        tenant_id=row_tenant_id,
+        scope_type=clean_scope_type,
+        scope_id=clean_scope_id,
+        label=_normalize_label(label),
+        provider=_normalize_provider(provider),
+        enabled=bool(enabled),
+        credential_mode=_normalize_credential_mode(credential_mode),
+        username=_clean(username),
+        password_encrypted=encrypt_secret(_clean(password)),
+        token_encrypted=encrypt_secret(_clean(token)),
+        password_env=_clean(password_env),
+        token_env=_clean(token_env),
+        secret_ref=_clean(secret_ref),
+        policy=dict(policy or {}),
+        metadata_=dict(metadata or {}),
+        created_by_user_id=user_id,
+        updated_by_user_id=user_id,
+    )
+    session.add(row)
+    session.flush()
+    return row
+
+
+def update_connector_credential_row(
+    session: Session,
+    row: FileConnectorCredential,
+    *,
+    user_id: str | None,
+    label: str | None = None,
+    provider: str | None = None,
+    enabled: bool | None = None,
+    credential_mode: str | None = None,
+    username: str | None = None,
+    password: str | None = None,
+    token: str | None = None,
+    password_env: str | None = None,
+    token_env: str | None = None,
+    secret_ref: str | None = None,
+    policy: Mapping[str, Any] | None = None,
+    metadata: Mapping[str, Any] | None = None,
+    clear_password: bool = False,
+    clear_token: bool = False,
+) -> FileConnectorCredential:
+    reject_api_controlled_deployment_references(
+        password_env=password_env,
+        token_env=token_env,
+        secret_ref=secret_ref,
+        metadata=metadata,
+    )
+    if secret_ref is not None and _clean(secret_ref) != _clean(row.secret_ref):
+        if _clean(row.secret_ref):
+            raise FileStorageError(
+                "An existing external secret reference cannot be replaced or cleared until Files can prove "
+                "provider ownership and confirm provider-side deletion"
+            )
+    if label is not None:
+        row.label = _normalize_label(label)
+    if provider is not None:
+        row.provider = _normalize_provider(provider)
+    if enabled is not None:
+        row.enabled = bool(enabled)
+    if credential_mode is not None:
+        row.credential_mode = _normalize_credential_mode(credential_mode)
+    if username is not None:
+        row.username = _clean(username)
+    if password is not None:
+        row.password_encrypted = encrypt_secret(_clean(password))
+    elif clear_password:
+        row.password_encrypted = None
+    if token is not None:
+        row.token_encrypted = encrypt_secret(_clean(token))
+    elif clear_token:
+        row.token_encrypted = None
+    if password_env is not None:
+        row.password_env = _clean(password_env)
+    if token_env is not None:
+        row.token_env = _clean(token_env)
+    if secret_ref is not None:
+        row.secret_ref = _clean(secret_ref)
+    if policy is not None:
+        row.policy = dict(policy)
+    if metadata is not None:
+        row.metadata_ = dict(metadata)
+    row.updated_by_user_id = user_id
+    session.add(row)
+    session.flush()
+    return row
+
+
+def _normalize_scope(*, tenant_id: str, scope_type: str, scope_id: str | None) -> tuple[str, str | None, str | None]:
+    clean_scope_type = normalize_policy_scope_type(scope_type)
+    clean_scope_id = _clean(scope_id)
+    if clean_scope_type == "system":
+        return "system", None, None
+    if clean_scope_type == "tenant":
+        return "tenant", tenant_id, tenant_id
+    if clean_scope_type in {"user", "group", "campaign"}:
+        if not clean_scope_id:
+            raise FileStorageError(f"{clean_scope_type.capitalize()} connector credentials require scope_id")
+        return clean_scope_type, clean_scope_id, tenant_id
+    raise FileStorageError("Unsupported connector credential scope")
+
+
+def _normalize_id(value: str) -> str:
+    clean = _clean(value)
+    if not clean:
+        raise FileStorageError("Connector credential id is required")
+    if len(clean) > 255:
+        raise FileStorageError("Connector credential id is too long")
+    if any(char.isspace() for char in clean):
+        raise FileStorageError("Connector credential id cannot contain whitespace")
+    return clean
+
+
+def _normalize_label(value: str) -> str:
+    clean = value.strip()
+    if not clean:
+        raise FileStorageError("Connector credential label is required")
+    if len(clean) > 255:
+        raise FileStorageError("Connector credential label is too long")
+    return clean
+
+
+def _normalize_provider(value: str | None) -> str | None:
+    clean = _clean(value)
+    if clean is None:
+        return None
+    clean = clean.casefold()
+    if clean not in supported_connector_providers():
+        raise FileStorageError(f"Unsupported connector credential provider: {value}")
+    return clean
+
+
+def _normalize_credential_mode(value: str) -> str:
+    clean = value.strip().casefold() or "none"
+    if clean not in {"none", "anonymous", "basic", "token", "secret_ref"}:
+        raise FileStorageError(f"Unsupported connector credential mode: {value}")
+    return clean
+
+
+def _policy_source_response(source: ConnectorPolicySource) -> dict[str, Any]:
+    return {
+        "scope_type": source.scope_type,
+        "scope_id": source.scope_id,
+        "label": source.label,
+        "policy": dict(source.policy or {}),
+    }
+
+
+def _envelope_credential_mode(kind: str, secret_values: Mapping[str, Any] | list[str]) -> str:
+    keys = {str(key) for key in secret_values}
+    if kind in {"token", "oauth2", "api_key"} or keys.intersection(
+        {"access_token", "bearer_token", "token", "api_key"}
+    ):
+        return "token"
+    return "basic"
+
+
+def _clean_public_value(values: Mapping[str, Any] | None, key: str) -> str | None:
+    return _clean((values or {}).get(key))
+
+
+def _first_secret(values: Mapping[str, Any], *keys: str) -> str | None:
+    for key in keys:
+        value = _clean(values.get(key))
+        if value is not None:
+            return value
+    return None
+
+
+def _clean(value: object) -> str | None:
+    if value is None:
+        return None
+    text = str(value).strip()
+    return text or None

src/govoplan_files/backend/storage/connector_deployment.py

@@ -0,0 +1,241 @@
+from __future__ import annotations
+
+import os
+import re
+from collections.abc import Mapping
+from pathlib import Path
+from typing import Any
+
+
+_SECRET_ENV_ALLOWLIST = "GOVOPLAN_CONNECTOR_SECRET_ENV_ALLOWLIST"  # noqa: S105  # nosec B105 - configuration key.
+_CA_BUNDLE_ALLOWLIST = "GOVOPLAN_CONNECTOR_CA_BUNDLE_ALLOWLIST"
+_ENV_NAME = re.compile(r"[A-Za-z_][A-Za-z0-9_]*\Z")
+_SECRET_ENV_METADATA_KEYS = frozenset(
+    {
+        "access_key_id_env",
+        "secret_access_key_env",
+        "session_token_env",
+    }
+)
+_SECRET_VALUE_METADATA_KEYS = frozenset(
+    {
+        "password",
+        "token",
+        "access_token",
+        "auth_token",
+        "bearer_token",
+        "refresh_token",
+        "api_key",
+        "access_key",
+        "access_key_id",
+        "secret_key",
+        "secret_access_key",
+        "session_token",
+    }
+)
+_DEVELOPMENT_ENVIRONMENTS = frozenset({"dev", "development", "local", "test", "testing"})
+
+
+class ConnectorDeploymentConfigurationError(ValueError):
+    """Raised when connector data crosses a deployment-owned trust boundary."""
+
+
+def connector_secret_env_value(name: str, *, source_kind: str) -> str:
+    clean_name = _validate_secret_env_reference(name, source_kind=source_kind)
+    value = os.environ.get(clean_name)
+    if value is None or value == "":
+        raise ConnectorDeploymentConfigurationError("Connector credential environment variable is not configured")
+    return value
+
+
+def connector_secret_env_available(name: str | None, *, source_kind: str) -> bool:
+    if not name:
+        return False
+    try:
+        clean_name = _validate_secret_env_reference(name, source_kind=source_kind)
+    except ConnectorDeploymentConfigurationError:
+        return False
+    return bool(os.environ.get(clean_name))
+
+
+def validate_deployment_connector_references(
+    *,
+    source_kind: str,
+    password_env: str | None = None,
+    token_env: str | None = None,
+    metadata: Mapping[str, Any] | None = None,
+) -> None:
+    """Validate references in deployment-owned connector configuration."""
+
+    for name in (password_env, token_env):
+        if name:
+            _validate_secret_env_reference(name, source_kind=source_kind)
+    for key in _SECRET_ENV_METADATA_KEYS:
+        name = _clean((metadata or {}).get(key))
+        if name:
+            _validate_secret_env_reference(name, source_kind=source_kind)
+    validate_connector_tls_metadata(metadata)
+
+
+def reject_api_controlled_deployment_references(
+    *,
+    password_env: str | None = None,
+    token_env: str | None = None,
+    secret_ref: str | None = None,
+    metadata: Mapping[str, Any] | None = None,
+) -> None:
+    """Reject process-secret selectors controlled through tenant-facing APIs."""
+
+    if _clean(password_env) or _clean(token_env):
+        raise ConnectorDeploymentConfigurationError(
+            "Environment-backed credentials may only be declared in deployment-owned connector configuration"
+        )
+    if _clean(secret_ref):
+        raise ConnectorDeploymentConfigurationError(
+            "External secret references cannot be managed through the Files API until Files can prove "
+            "provider ownership and confirm provider-side deletion"
+        )
+    for key, value in _metadata_entries(metadata or {}):
+        clean_key = str(key).strip().casefold()
+        if _clean(value) and (clean_key in _SECRET_ENV_METADATA_KEYS or clean_key.endswith("_env")):
+            raise ConnectorDeploymentConfigurationError(
+                "Environment-backed credentials may only be declared in deployment-owned connector configuration"
+            )
+        if _clean(value) and (
+            clean_key in _SECRET_VALUE_METADATA_KEYS
+            or clean_key.endswith(("_password", "_secret", "_api_key"))
+        ):
+            raise ConnectorDeploymentConfigurationError(
+                "Connector credential values must use the dedicated encrypted credential fields, not metadata"
+            )
+    validate_connector_tls_metadata(metadata)
+
+
+def _metadata_entries(value: object) -> list[tuple[str, object]]:
+    entries: list[tuple[str, object]] = []
+    if isinstance(value, Mapping):
+        for key, item in value.items():
+            entries.append((str(key), item))
+            entries.extend(_metadata_entries(item))
+    elif isinstance(value, (list, tuple)):
+        for item in value:
+            entries.extend(_metadata_entries(item))
+    return entries
+
+
+def connector_ca_bundle_path(value: str) -> str:
+    clean_value = _clean(value)
+    if not clean_value:
+        raise ConnectorDeploymentConfigurationError("Connector CA bundle path is empty")
+    candidate = Path(clean_value)
+    if not candidate.is_absolute():
+        raise ConnectorDeploymentConfigurationError("Connector CA bundle paths must be absolute")
+    try:
+        resolved = candidate.resolve(strict=True)
+    except OSError as exc:
+        raise ConnectorDeploymentConfigurationError("Connector CA bundle path does not exist") from exc
+    allowed = _allowed_ca_bundle_paths()
+    if resolved not in allowed:
+        raise ConnectorDeploymentConfigurationError(
+            f"Connector CA bundle path is not listed in {_CA_BUNDLE_ALLOWLIST}"
+        )
+    if not resolved.is_file():
+        raise ConnectorDeploymentConfigurationError("Connector CA bundle path must be a regular file")
+    return str(resolved)
+
+
+def validate_connector_tls_metadata(metadata: Mapping[str, Any] | None) -> None:
+    values = metadata or {}
+    ca_bundle = _clean(values.get("ca_bundle"))
+    if ca_bundle:
+        connector_ca_bundle_path(ca_bundle)
+    for key in ("verify_tls", "tls_verify"):
+        if key in values and not _as_bool(values.get(key), default=True) and not _development_runtime():
+            raise ConnectorDeploymentConfigurationError(
+                "Connector TLS certificate verification may only be disabled in dev/test environments"
+            )
+
+
+def connector_effective_endpoint_url(
+    *,
+    provider: str | None,
+    endpoint_url: str | None,
+    metadata: Mapping[str, Any] | None,
+) -> str | None:
+    """Return the endpoint that connector I/O will actually use."""
+
+    clean_provider = (provider or "").strip().casefold()
+    values = metadata or {}
+    webdav_url = _clean(values.get("webdav_endpoint_url"))
+    browse_protocol = (_clean(values.get("browse_protocol")) or "").casefold()
+    if webdav_url and (clean_provider in {"seafile", "webdav", "nextcloud"} or browse_protocol == "webdav"):
+        return webdav_url
+    return _clean(endpoint_url)
+
+
+def _validate_secret_env_reference(name: str, *, source_kind: str) -> str:
+    if source_kind.strip().casefold() != "settings":
+        raise ConnectorDeploymentConfigurationError(
+            "Environment-backed credentials may only be used by deployment-owned connector configuration"
+        )
+    clean_name = name.strip()
+    if not _ENV_NAME.fullmatch(clean_name):
+        raise ConnectorDeploymentConfigurationError("Connector credential environment variable name is invalid")
+    if clean_name not in _allowed_secret_env_names():
+        raise ConnectorDeploymentConfigurationError(
+            f"Connector credential environment variable is not listed in {_SECRET_ENV_ALLOWLIST}"
+        )
+    return clean_name
+
+
+def _allowed_secret_env_names() -> frozenset[str]:
+    raw = os.environ.get(_SECRET_ENV_ALLOWLIST, "")
+    names = frozenset(item.strip() for item in raw.split(",") if item.strip())
+    invalid = sorted(name for name in names if not _ENV_NAME.fullmatch(name))
+    if invalid:
+        raise ConnectorDeploymentConfigurationError(f"{_SECRET_ENV_ALLOWLIST} contains an invalid variable name")
+    return names
+
+
+def _allowed_ca_bundle_paths() -> frozenset[Path]:
+    raw = os.environ.get(_CA_BUNDLE_ALLOWLIST, "")
+    paths: set[Path] = set()
+    for item in (part.strip() for part in raw.split(",")):
+        if not item:
+            continue
+        path = Path(item)
+        if not path.is_absolute():
+            raise ConnectorDeploymentConfigurationError(f"{_CA_BUNDLE_ALLOWLIST} requires absolute paths")
+        try:
+            paths.add(path.resolve(strict=True))
+        except OSError as exc:
+            raise ConnectorDeploymentConfigurationError(f"{_CA_BUNDLE_ALLOWLIST} contains a missing path") from exc
+    return frozenset(paths)
+
+
+def _development_runtime() -> bool:
+    app_env = os.environ.get("APP_ENV", "dev").strip().casefold()
+    install_profile = os.environ.get("GOVOPLAN_INSTALL_PROFILE", "").strip().casefold()
+    return app_env in _DEVELOPMENT_ENVIRONMENTS and (
+        not install_profile or install_profile in _DEVELOPMENT_ENVIRONMENTS
+    )
+
+
+def _as_bool(value: object, *, default: bool) -> bool:
+    if value is None:
+        return default
+    if isinstance(value, bool):
+        return value
+    clean = str(value).strip().casefold()
+    if clean in {"1", "true", "yes", "on"}:
+        return True
+    if clean in {"0", "false", "no", "off"}:
+        return False
+    raise ConnectorDeploymentConfigurationError("Connector TLS verification setting must be true or false")
+
+
+def _clean(value: object) -> str | None:
+    if value is None:
+        return None
+    clean = str(value).strip()
+    return clean or None

src/govoplan_files/backend/storage/connector_folder_sync.py

@@ -0,0 +1,139 @@
+from __future__ import annotations
+
+from collections import deque
+from dataclasses import dataclass, field
+
+from govoplan_files.backend.storage.connector_browse import (
+    ConnectorBrowseItem,
+    browse_connector_profile,
+    normalize_connector_browse_path,
+)
+from govoplan_files.backend.storage.connector_profiles import ConnectorProfile
+
+
+@dataclass(frozen=True, slots=True)
+class ConnectorFolderSkip:
+    path: str
+    reason: str
+
+
+@dataclass(slots=True)
+class ConnectorFolderDiscovery:
+    files: list[ConnectorBrowseItem] = field(default_factory=list)
+    skipped: list[ConnectorFolderSkip] = field(default_factory=list)
+    truncated: bool = False
+
+
+def discover_connector_folder(
+    profile: ConnectorProfile,
+    *,
+    path: str,
+    library_id: str | None,
+    recursive: bool,
+    max_files: int,
+    max_depth: int,
+) -> ConnectorFolderDiscovery:
+    """Discover a bounded, deterministic set of files below one connector folder."""
+
+    root_path = normalize_connector_browse_path(path)
+    queue: deque[tuple[str, int]] = deque([(root_path, 0)])
+    visited_folders: set[str] = set()
+    seen_files: set[tuple[str, str]] = set()
+    result = ConnectorFolderDiscovery()
+
+    while queue:
+        folder_path, depth = queue.popleft()
+        if folder_path in visited_folders:
+            continue
+        visited_folders.add(folder_path)
+
+        continuation_token: str | None = None
+        seen_tokens: set[str] = set()
+        while True:
+            items = browse_connector_profile(
+                profile,
+                path=folder_path,
+                library_id=library_id,
+                continuation_token=continuation_token,
+            )
+            for item in items:
+                item_path = normalize_connector_browse_path(item.path)
+                if item.kind == "file":
+                    identity = (str(item.external_id or ""), item_path)
+                    if identity in seen_files:
+                        continue
+                    if len(result.files) >= max_files:
+                        result.truncated = True
+                        result.skipped.append(
+                            ConnectorFolderSkip(
+                                path=item_path or folder_path,
+                                reason=f"The manual sync limit of {max_files} files was reached.",
+                            )
+                        )
+                        return result
+                    seen_files.add(identity)
+                    result.files.append(item)
+                    continue
+
+                if item.kind == "folder":
+                    if not recursive:
+                        result.skipped.append(
+                            ConnectorFolderSkip(
+                                path=item_path,
+                                reason="Subfolder skipped because recursive sync is disabled.",
+                            )
+                        )
+                    elif depth >= max_depth:
+                        result.skipped.append(
+                            ConnectorFolderSkip(
+                                path=item_path,
+                                reason=f"Subfolder skipped at the configured depth limit of {max_depth}.",
+                            )
+                        )
+                    else:
+                        queue.append((item_path, depth + 1))
+                    continue
+
+                result.skipped.append(
+                    ConnectorFolderSkip(
+                        path=item_path,
+                        reason=f"Connector item kind {item.kind!r} cannot be synchronized as a file.",
+                    )
+                )
+
+            next_token = _next_continuation_token(items)
+            if not next_token or next_token in seen_tokens:
+                break
+            seen_tokens.add(next_token)
+            continuation_token = next_token
+
+    result.files.sort(key=lambda item: normalize_connector_browse_path(item.path).casefold())
+    result.skipped.sort(key=lambda item: (item.path.casefold(), item.reason))
+    return result
+
+
+def connector_relative_path(*, space_root: str, item_path: str) -> str:
+    root = normalize_connector_browse_path(space_root)
+    item = normalize_connector_browse_path(item_path)
+    if not root:
+        return item
+    if item == root:
+        return item.rsplit("/", 1)[-1]
+    prefix = f"{root}/"
+    if not item.startswith(prefix):
+        raise ValueError("Connector returned a file outside the linked connector-space root")
+    return item[len(prefix) :]
+
+
+def join_connector_path(*parts: str | None) -> str:
+    return normalize_connector_browse_path(
+        "/".join(str(part or "").strip("/\\") for part in parts if str(part or "").strip("/\\"))
+    )
+
+
+def _next_continuation_token(items: list[ConnectorBrowseItem]) -> str | None:
+    for item in reversed(items):
+        value = item.metadata.get("next_continuation_token")
+        if value is not None and str(value).strip():
+            return str(value).strip()
+    return None

src/govoplan_files/backend/storage/connector_imports.py

@@ -0,0 +1,358 @@
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+import mimetypes
+from typing import Any
+
+from govoplan_core.security.outbound_http import response_limit
+
+from govoplan_files.backend.storage.connector_browse import (
+    ConnectorBrowseError,
+    ConnectorBrowseUnsupported,
+    _clean,
+    _metadata_string,
+    _profile_password,
+    _profile_token,
+    _request_json,
+    _smb_client_kwargs,
+    _smb_location,
+    _smb_stat_modified_at,
+    _smb_stat_revision,
+    _smb_stat_size,
+    _smb_unc_path,
+    _smbclient_module,
+    _s3_bucket,
+    _s3_client,
+    _s3_object_key,
+    _seafile_headers,
+    _seafile_url,
+    _webdav_url,
+    normalize_connector_browse_path,
+)
+from govoplan_files.backend.storage.connector_profiles import ConnectorProfile
+from govoplan_files.backend.storage.http_client import ConnectorHttpError, request_connector_bytes
+from govoplan_files.backend.storage.paths import filename_from_path
+
+
+class ConnectorImportError(RuntimeError):
+    pass
+
+
+class ConnectorImportUnsupported(ConnectorImportError):
+    pass
+
+
+@dataclass(frozen=True, slots=True)
+class ConnectorDownloadedFile:
+    filename: str
+    data: bytes
+    content_type: str | None = None
+    revision: str | None = None
+    external_id: str | None = None
+    external_url: str | None = None
+    metadata: dict[str, Any] = field(default_factory=dict)
+
+
+def read_connector_file(
+    profile: ConnectorProfile,
+    *,
+    library_id: str,
+    path: str,
+    max_bytes: int,
+) -> ConnectorDownloadedFile:
+    max_bytes = min(max_bytes, response_limit("file"))
+    if profile.provider == "seafile":
+        if _metadata_string(profile, "browse_protocol") == "webdav" or _metadata_string(profile, "webdav_endpoint_url"):
+            return _read_webdav_file(profile, path=path, max_bytes=max_bytes)
+        return _read_seafile_file(profile, library_id=library_id, path=path, max_bytes=max_bytes)
+    if profile.provider in {"webdav", "nextcloud"}:
+        return _read_webdav_file(profile, path=path, max_bytes=max_bytes)
+    if profile.provider == "smb":
+        return _read_smb_file(profile, path=path, max_bytes=max_bytes)
+    if profile.provider == "s3":
+        return _read_s3_file(profile, library_id=library_id, path=path, max_bytes=max_bytes)
+    raise ConnectorImportUnsupported(f"Connector file import is not implemented for {profile.provider} profiles yet")
+
+
+def _read_seafile_file(profile: ConnectorProfile, *, library_id: str, path: str, max_bytes: int) -> ConnectorDownloadedFile:
+    repo_id = _clean(library_id)
+    if not repo_id:
+        raise ConnectorImportError("Seafile import requires library_id")
+    file_path = "/" + normalize_connector_browse_path(path)
+    if file_path == "/":
+        raise ConnectorImportError("Seafile import requires a file path")
+    try:
+        headers = _seafile_headers(profile)
+        detail = _request_json(
+            "GET",
+            _seafile_url(profile, f"api2/repos/{repo_id}/file/detail/"),
+            headers=headers,
+            params={"p": file_path},
+        )
+        if isinstance(detail, dict):
+            size = _int(detail.get("size"))
+            if size is not None and size > max_bytes:
+                raise ConnectorImportError(f"Seafile file exceeds limit of {max_bytes} bytes")
+        download_url = _request_json(
+            "GET",
+            _seafile_url(profile, f"api2/repos/{repo_id}/file/"),
+            headers=headers,
+            params={"p": file_path, "reuse": "1"},
+        )
+    except ConnectorBrowseError as exc:
+        raise ConnectorImportError(str(exc)) from exc
+    if not isinstance(download_url, str) or not download_url.strip():
+        raise ConnectorImportError("Seafile did not return a file download URL")
+    try:
+        response = request_connector_bytes(
+            "GET",
+            download_url,
+            timeout=30.0,
+            kind="file",
+            max_bytes=max_bytes,
+            label="Seafile file download",
+        )
+    except ConnectorHttpError as exc:
+        raise ConnectorImportError(f"Seafile file download failed: {exc}") from exc
+    if response.status_code != 200:
+        raise ConnectorImportError(f"Seafile file download failed with HTTP {response.status_code}")
+    data = response.content
+    if len(data) > max_bytes:
+        raise ConnectorImportError(f"Seafile file exceeds limit of {max_bytes} bytes")
+    detail = detail if isinstance(detail, dict) else {}
+    filename = filename_from_path(str(detail.get("name") or path))
+    content_type = response.headers.get("content-type") or mimetypes.guess_type(filename)[0]
+    external_id = f"{repo_id}:{normalize_connector_browse_path(path)}"
+    return ConnectorDownloadedFile(
+        filename=filename,
+        data=data,
+        content_type=content_type,
+        revision=_clean(detail.get("id") or detail.get("mtime") or detail.get("last_modified")),
+        external_id=external_id,
+        external_url=download_url,
+        metadata={
+            "library_id": repo_id,
+            "library_path": normalize_connector_browse_path(path),
+            "size": len(data),
+            **({key: detail[key] for key in ("permission", "last_modified", "mtime", "uploader_email", "last_modifier_email") if key in detail}),
+        },
+    )
+
+
+def _read_webdav_file(profile: ConnectorProfile, *, path: str, max_bytes: int) -> ConnectorDownloadedFile:
+    root_url = _metadata_string(profile, "webdav_endpoint_url") or profile.endpoint_url
+    if not root_url:
+        raise ConnectorImportError("WebDAV connector profile does not define endpoint_url")
+    file_path = normalize_connector_browse_path(path)
+    if not file_path:
+        raise ConnectorImportError("WebDAV import requires a file path")
+    url = _webdav_url(root_url, file_path).rstrip("/")
+    headers: dict[str, str] = {}
+    auth: tuple[str, str] | None = None
+    password = _profile_password(profile)
+    token = _profile_token(profile)
+    if profile.username and password:
+        auth = (profile.username, password)
+    elif token:
+        headers["Authorization"] = f"Bearer {token}"
+    elif profile.credential_mode.casefold() not in {"", "none", "anonymous"} and profile.secret_ref:
+        raise ConnectorImportError("Secret-ref WebDAV credentials need a runtime secret resolver before live import")
+    try:
+        response = request_connector_bytes(
+            "GET",
+            url,
+            headers=headers,
+            auth=auth,
+            timeout=30.0,
+            kind="file",
+            max_bytes=max_bytes,
+            label="WebDAV file download",
+        )
+    except ConnectorHttpError as exc:
+        raise ConnectorImportError(f"WebDAV file download failed: {exc}") from exc
+    if response.status_code in {401, 403}:
+        raise ConnectorImportError("Connector credentials were rejected")
+    if response.status_code != 200:
+        raise ConnectorImportError(f"WebDAV file download failed with HTTP {response.status_code}")
+    length = _int(response.headers.get("content-length"))
+    if length is not None and length > max_bytes:
+        raise ConnectorImportError(f"WebDAV file exceeds limit of {max_bytes} bytes")
+    data = response.content
+    if len(data) > max_bytes:
+        raise ConnectorImportError(f"WebDAV file exceeds limit of {max_bytes} bytes")
+    filename = filename_from_path(file_path)
+    revision = _clean(response.headers.get("etag") or response.headers.get("last-modified"))
+    return ConnectorDownloadedFile(
+        filename=filename,
+        data=data,
+        content_type=response.headers.get("content-type") or mimetypes.guess_type(filename)[0],
+        revision=revision,
+        external_id=file_path,
+        external_url=url,
+        metadata={"path": file_path, "size": len(data)},
+    )
+
+
+def _read_smb_file(profile: ConnectorProfile, *, path: str, max_bytes: int) -> ConnectorDownloadedFile:
+    file_path = normalize_connector_browse_path(path)
+    if not file_path:
+        raise ConnectorImportError("SMB import requires a file path")
+    try:
+        location = _smb_location(profile)
+        unc_path = _smb_unc_path(location, file_path)
+        smbclient = _smbclient_module()
+        kwargs = _smb_client_kwargs(profile, location)
+        stat_result = smbclient.stat(unc_path, **kwargs)
+        size = _smb_stat_size(stat_result)
+        if size is not None and size > max_bytes:
+            raise ConnectorImportError(f"SMB file exceeds limit of {max_bytes} bytes")
+        with smbclient.open_file(unc_path, mode="rb", **kwargs) as handle:
+            data = handle.read(max_bytes + 1)
+    except ConnectorBrowseUnsupported as exc:
+        raise ConnectorImportUnsupported(str(exc)) from exc
+    except ConnectorBrowseError as exc:
+        raise ConnectorImportError(str(exc)) from exc
+    except ConnectorImportError:
+        raise
+    except Exception as exc:  # pragma: no cover - concrete exception types are dependency-version specific
+        raise ConnectorImportError(f"SMB file download failed: {exc}") from exc
+    if len(data) > max_bytes:
+        raise ConnectorImportError(f"SMB file exceeds limit of {max_bytes} bytes")
+    filename = filename_from_path(file_path)
+    revision = _smb_stat_revision(stat_result)
+    return ConnectorDownloadedFile(
+        filename=filename,
+        data=data,
+        content_type=mimetypes.guess_type(filename)[0],
+        revision=revision,
+        external_id=f"{location.share}:{file_path}",
+        external_url=f"smb://{location.server}:{location.port}/{location.share}/{file_path}",
+        metadata={
+            "share": location.share,
+            "path": file_path,
+            "size": len(data),
+            "modified_at": _smb_stat_modified_at(stat_result),
+        },
+    )
+
+
+def _s3_import_client(profile: ConnectorProfile) -> Any:
+    try:
+        return _s3_client(profile)
+    except ConnectorBrowseUnsupported as exc:
+        raise ConnectorImportUnsupported(str(exc)) from exc
+    except ConnectorBrowseError as exc:
+        raise ConnectorImportError(str(exc)) from exc
+
+
+def _s3_object_detail(client: Any, *, bucket: str, key: str, max_bytes: int) -> dict[str, Any]:
+    try:
+        detail = client.head_object(Bucket=bucket, Key=key)
+    except Exception as exc:  # pragma: no cover - concrete exception types are dependency-version specific
+        raise ConnectorImportError(f"S3 object metadata lookup failed: {exc}") from exc
+    if not isinstance(detail, dict):
+        raise ConnectorImportError("S3 connector returned invalid object metadata")
+    size = _int(detail.get("ContentLength"))
+    if size is not None and size > max_bytes:
+        raise ConnectorImportError(f"S3 object exceeds limit of {max_bytes} bytes")
+    return detail
+
+
+def _download_s3_object(
+    client: Any,
+    *,
+    bucket: str,
+    key: str,
+    version_id: str | None,
+    max_bytes: int,
+) -> tuple[Any, bytes]:
+    request: dict[str, object] = {"Bucket": bucket, "Key": key}
+    if version_id:
+        request["VersionId"] = version_id
+    try:
+        response = client.get_object(**request)
+        body = response.get("Body")
+        data = body.read(max_bytes + 1) if hasattr(body, "read") else bytes(response.get("Body") or b"")
+    except Exception as exc:  # pragma: no cover - concrete exception types are dependency-version specific
+        raise ConnectorImportError(f"S3 object download failed: {exc}") from exc
+    if len(data) > max_bytes:
+        raise ConnectorImportError(f"S3 object exceeds limit of {max_bytes} bytes")
+    return response, data
+
+
+def _s3_download_metadata(
+    detail: dict[str, Any],
+    *,
+    bucket: str,
+    key: str,
+    version_id: str | None,
+    etag: str | None,
+    size: int,
+) -> dict[str, Any]:
+    metadata: dict[str, Any] = {
+        "bucket": bucket,
+        "key": key,
+        "version_id": version_id,
+        "etag": etag,
+        "size": size,
+    }
+    for source_key, target_key in (
+        ("ChecksumSHA256", "checksum_sha256"),
+        ("ChecksumCRC32", "checksum_crc32"),
+        ("StorageClass", "storage_class"),
+    ):
+        if source_key in detail:
+            metadata[target_key] = detail[source_key]
+    return metadata
+
+
+def _read_s3_file(profile: ConnectorProfile, *, library_id: str, path: str, max_bytes: int) -> ConnectorDownloadedFile:
+    bucket = _s3_bucket(profile, library_id)
+    if not bucket:
+        raise ConnectorImportError("S3 import requires a bucket in library_id or profile metadata")
+    key = _s3_object_key(profile, path)
+    if not key:
+        raise ConnectorImportError("S3 import requires an object key")
+    client = _s3_import_client(profile)
+    try:
+        detail = _s3_object_detail(client, bucket=bucket, key=key, max_bytes=max_bytes)
+        version_id = _clean(detail.get("VersionId"))
+        response, data = _download_s3_object(
+            client,
+            bucket=bucket,
+            key=key,
+            version_id=version_id,
+            max_bytes=max_bytes,
+        )
+    finally:
+        close = getattr(client, "close", None)
+        if callable(close):
+            close()
+    content_type = _clean(response.get("ContentType") if isinstance(response, dict) else None) or _clean(detail.get("ContentType")) or mimetypes.guess_type(key)[0]
+    etag = _clean(response.get("ETag") if isinstance(response, dict) else None) or _clean(detail.get("ETag"))
+    filename = filename_from_path(key)
+    return ConnectorDownloadedFile(
+        filename=filename,
+        data=data,
+        content_type=content_type,
+        revision=version_id or etag or _clean(detail.get("LastModified")),
+        external_id=f"{bucket}:{key}",
+        external_url=f"s3://{bucket}/{key}",
+        metadata=_s3_download_metadata(
+            detail,
+            bucket=bucket,
+            key=key,
+            version_id=version_id,
+            etag=etag,
+            size=len(data),
+        ),
+    )
+
+
+def _int(value: object) -> int | None:
+    if value is None or value == "":
+        return None
+    try:
+        return int(value)
+    except (TypeError, ValueError):
+        return None

src/govoplan_files/backend/storage/connector_policy.py

@@ -0,0 +1,310 @@
+from __future__ import annotations
+
+from collections.abc import Iterable, Mapping
+from dataclasses import dataclass
+from fnmatch import fnmatchcase
+from typing import Any
+
+from govoplan_core.core.policy import PolicyDecision, PolicySourceStep, normalize_policy_scope_type
+
+
+_ALLOW_KEYS = ("allow", "allowlist", "whitelist")
+_DENY_KEYS = ("deny", "denylist", "blacklist")
+
+_FIELD_ALIASES = {
+    "connectors": ("connectors", "connector_ids", "connector_id"),
+    "credentials": ("credentials", "credential_ids", "credential_id"),
+    "providers": ("providers", "provider"),
+    "external_ids": ("external_ids", "external_id"),
+    "external_paths": ("external_paths", "paths", "path_prefixes", "external_path"),
+    "external_urls": ("external_urls", "urls", "external_url"),
+}
+
+CONNECTOR_POLICY_FIELDS = tuple(_FIELD_ALIASES)
+
+
+class ConnectorPolicyDenied(RuntimeError):
+    def __init__(self, decision: PolicyDecision) -> None:
+        super().__init__(decision.reason or "Connector policy denied")
+        self.decision = decision
+
+
+@dataclass(frozen=True, slots=True)
+class ConnectorAccessRequest:
+    connector_id: str | None = None
+    credential_id: str | None = None
+    provider: str | None = None
+    external_id: str | None = None
+    external_path: str | None = None
+    external_url: str | None = None
+    operation: str = "access"
+
+    @classmethod
+    def from_provenance(cls, value: Mapping[str, Any] | None, *, operation: str = "access") -> "ConnectorAccessRequest":
+        payload = value or {}
+        return cls(
+            connector_id=_clean(payload.get("connector_id")),
+            credential_id=_clean(payload.get("credential_id") or payload.get("connector_credential_id")),
+            provider=_clean(payload.get("provider") or payload.get("source_type")),
+            external_id=_clean(payload.get("external_id")),
+            external_path=_clean(payload.get("external_path")),
+            external_url=_clean(payload.get("external_url")),
+            operation=_clean(operation) or "access",
+        )
+
+    def to_dict(self) -> dict[str, str | None]:
+        return {
+            "connector_id": self.connector_id,
+            "credential_id": self.credential_id,
+            "provider": self.provider,
+            "external_id": self.external_id,
+            "external_path": self.external_path,
+            "external_url": self.external_url,
+            "operation": self.operation,
+        }
+
+
+@dataclass(frozen=True, slots=True)
+class ConnectorPolicySource:
+    scope_type: str
+    label: str
+    scope_id: str | None = None
+    policy: Mapping[str, Any] | None = None
+
+    def source_step(self, applied_fields: Iterable[str]) -> PolicySourceStep:
+        return PolicySourceStep(
+            scope_type=normalize_policy_scope_type(self.scope_type),
+            scope_id=self.scope_id,
+            label=self.label,
+            applied_fields=tuple(dict.fromkeys(applied_fields)),
+            policy=dict(self.policy or {}),
+        )
+
+
+def connector_policy_sources_from_payload(value: object) -> list[ConnectorPolicySource]:
+    if value is None or value == "":
+        return []
+    if isinstance(value, Mapping):
+        raw_sources = value.get("sources")
+        if raw_sources is None:
+            raw_sources = [value]
+    elif isinstance(value, list):
+        raw_sources = value
+    else:
+        raise ValueError("connector_policy must be a JSON object or list")
+    if not isinstance(raw_sources, list):
+        raise ValueError("connector_policy.sources must be a list")
+    return [_source_from_mapping(item) for item in raw_sources if isinstance(item, Mapping)]
+
+
+def connector_policy_applied_fields(policy: Mapping[str, Any] | None) -> tuple[str, ...]:
+    return _applied_fields(_policy_mapping(policy))
+
+
+def filtered_connector_policy_source(source: ConnectorPolicySource, fields: Iterable[str]) -> ConnectorPolicySource:
+    allowed_fields = {field for field in fields if field in _FIELD_ALIASES}
+    if not allowed_fields:
+        return ConnectorPolicySource(scope_type=source.scope_type, scope_id=source.scope_id, label=source.label, policy={})
+    policy = _policy_mapping(source.policy)
+    filtered: dict[str, Any] = {}
+    for prefix, keys in (("allow", _ALLOW_KEYS), ("deny", _DENY_KEYS)):
+        rules = _merged_rule(policy, keys)
+        selected = {field: _string_list(rules.get(field)) for field in allowed_fields}
+        selected = {field: values for field, values in selected.items() if values}
+        if selected:
+            filtered[prefix] = selected
+    return ConnectorPolicySource(scope_type=source.scope_type, scope_id=source.scope_id, label=source.label, policy=filtered)
+
+
+def connector_policy_sources_for_fields(
+    sources: Iterable[ConnectorPolicySource],
+    fields: Iterable[str],
+) -> list[ConnectorPolicySource]:
+    return [filtered_connector_policy_source(source, fields) for source in sources]
+
+
+def connector_policy_decision(
+    request: ConnectorAccessRequest,
+    sources: Iterable[ConnectorPolicySource],
+) -> PolicyDecision:
+    source_list = list(sources)
+    source_steps: list[PolicySourceStep] = []
+    deny_matches: list[dict[str, Any]] = []
+    allow_misses: list[dict[str, Any]] = []
+
+    for source in source_list:
+        policy = _policy_mapping(source.policy)
+        applied_fields = _applied_fields(policy)
+        if applied_fields:
+            source_steps.append(source.source_step(applied_fields))
+
+        deny_policy = _merged_rule(policy, _DENY_KEYS)
+        for field, patterns in _rules_by_field(deny_policy).items():
+            if _matches_field(request, field, patterns):
+                deny_matches.append({
+                    "scope": source.source_step((f"deny.{field}",)).to_dict(),
+                    "field": field,
+                    "patterns": patterns,
+                })
+
+        allow_policy = _merged_rule(policy, _ALLOW_KEYS)
+        for field, patterns in _rules_by_field(allow_policy).items():
+            if not _matches_field(request, field, patterns):
+                allow_misses.append({
+                    "scope": source.source_step((f"allow.{field}",)).to_dict(),
+                    "field": field,
+                    "patterns": patterns,
+                })
+
+    details = {
+        "request": request.to_dict(),
+        "deny_matches": deny_matches,
+        "allow_misses": allow_misses,
+    }
+    if deny_matches:
+        return PolicyDecision(
+            allowed=False,
+            reason="Connector access is denied by a blacklist rule.",
+            source_path=tuple(source_steps),
+            requirements=("connector_policy_denylist",),
+            details=details,
+        )
+    if allow_misses:
+        return PolicyDecision(
+            allowed=False,
+            reason="Connector access is not allowed by the configured whitelist.",
+            source_path=tuple(source_steps),
+            requirements=("connector_policy_allowlist",),
+            details=details,
+        )
+    return PolicyDecision(
+        allowed=True,
+        reason=None,
+        source_path=tuple(source_steps),
+        requirements=(),
+        details=details,
+    )
+
+
+def ensure_connector_policy_allows(
+    request: ConnectorAccessRequest,
+    sources: Iterable[ConnectorPolicySource],
+) -> PolicyDecision:
+    decision = connector_policy_decision(request, sources)
+    if not decision.allowed:
+        raise ConnectorPolicyDenied(decision)
+    return decision
+
+
+def _source_from_mapping(value: Mapping[str, Any]) -> ConnectorPolicySource:
+    scope_type = normalize_policy_scope_type(str(value.get("scope_type") or "system"))
+    scope_id = _clean(value.get("scope_id"))
+    if scope_type == "system":
+        scope_id = None
+    elif not scope_id:
+        raise ValueError(f"{scope_type} connector policy sources require scope_id")
+    label = _clean(value.get("label")) or scope_type.capitalize()
+    policy = value.get("policy")
+    if policy is None:
+        policy = {key: value[key] for key in (*_ALLOW_KEYS, *_DENY_KEYS) if key in value}
+    if policy is not None and not isinstance(policy, Mapping):
+        raise ValueError("connector policy source policy must be a JSON object")
+    return ConnectorPolicySource(scope_type=scope_type, scope_id=scope_id, label=label, policy=policy or {})
+
+
+def _policy_mapping(value: Mapping[str, Any] | None) -> Mapping[str, Any]:
+    return value if isinstance(value, Mapping) else {}
+
+
+def _merged_rule(policy: Mapping[str, Any], keys: Iterable[str]) -> dict[str, Any]:
+    merged: dict[str, Any] = {}
+    for key in keys:
+        raw = policy.get(key)
+        if isinstance(raw, Mapping):
+            merged.update(raw)
+    return merged
+
+
+def _rules_by_field(value: Mapping[str, Any]) -> dict[str, list[str]]:
+    result: dict[str, list[str]] = {}
+    for field, aliases in _FIELD_ALIASES.items():
+        items: list[str] = []
+        for alias in aliases:
+            items.extend(_string_list(value.get(alias)))
+        if items:
+            result[field] = list(dict.fromkeys(items))
+    return result
+
+
+def _applied_fields(policy: Mapping[str, Any]) -> tuple[str, ...]:
+    fields: list[str] = []
+    for prefix, keys in (("allow", _ALLOW_KEYS), ("deny", _DENY_KEYS)):
+        rules = _merged_rule(policy, keys)
+        fields.extend(f"{prefix}.{field}" for field in _rules_by_field(rules))
+    return tuple(dict.fromkeys(fields))
+
+
+def _matches_field(request: ConnectorAccessRequest, field: str, patterns: list[str]) -> bool:
+    if field == "connectors":
+        return _matches_reference(request.connector_id, patterns)
+    if field == "credentials":
+        return _matches_reference(request.credential_id, patterns)
+    if field == "providers":
+        return _matches_reference(request.provider, patterns)
+    if field == "external_ids":
+        return _matches_glob(request.external_id, patterns)
+    if field == "external_paths":
+        return _matches_path(request.external_path, patterns)
+    if field == "external_urls":
+        return _matches_glob(request.external_url, patterns)
+    return False
+
+
+def _matches_reference(value: str | None, patterns: list[str]) -> bool:
+    if value is None:
+        return False
+    clean = value.casefold()
+    return any(fnmatchcase(clean, pattern.casefold()) for pattern in patterns)
+
+
+def _matches_glob(value: str | None, patterns: list[str]) -> bool:
+    if value is None:
+        return False
+    clean = value.casefold()
+    return any(fnmatchcase(clean, pattern.casefold()) for pattern in patterns)
+
+
+def _matches_path(value: str | None, patterns: list[str]) -> bool:
+    if value is None:
+        return False
+    clean = value.replace("\\", "/").strip()
+    for pattern in patterns:
+        normalized = pattern.replace("\\", "/").strip()
+        if normalized == "*":
+            return True
+        if any(token in normalized for token in "*?[]"):
+            if fnmatchcase(clean.casefold(), normalized.casefold()):
+                return True
+            continue
+        if clean.casefold() == normalized.casefold() or clean.casefold().startswith(normalized.rstrip("/").casefold() + "/"):
+            return True
+    return False
+
+
+def _string_list(value: object) -> list[str]:
+    if value is None:
+        return []
+    if isinstance(value, str):
+        values = [value]
+    elif isinstance(value, Iterable) and not isinstance(value, (bytes, bytearray, Mapping)):
+        values = [str(item) for item in value]
+    else:
+        values = [str(value)]
+    return [item.strip() for item in values if item.strip()]
+
+
+def _clean(value: object) -> str | None:
+    if value is None:
+        return None
+    text = str(value).strip()
+    return text or None

src/govoplan_files/backend/storage/connector_policy_store.py

@@ -0,0 +1,334 @@
+from __future__ import annotations
+
+from collections.abc import Iterable, Mapping
+from typing import Any
+
+from sqlalchemy.orm import Session
+
+from govoplan_core.core.policy import normalize_policy_scope_type
+from govoplan_files.backend.db.models import FileConnectorPolicy
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.connector_policy import (
+    CONNECTOR_POLICY_FIELDS,
+    ConnectorPolicySource,
+    connector_policy_applied_fields,
+)
+
+_RULE_GROUPS = ("allow", "deny")
+_FIELD_ALIASES = {
+    "connectors": ("connectors", "connector_ids", "connector_id"),
+    "credentials": ("credentials", "credential_ids", "credential_id"),
+    "providers": ("providers", "provider"),
+    "external_ids": ("external_ids", "external_id"),
+    "external_paths": ("external_paths", "paths", "path_prefixes", "external_path"),
+    "external_urls": ("external_urls", "urls", "external_url"),
+}
+
+
+def get_connector_policy(
+    session: Session,
+    *,
+    tenant_id: str,
+    scope_type: str,
+    scope_id: str | None = None,
+) -> dict[str, Any]:
+    row = _connector_policy_row(session, tenant_id=tenant_id, scope_type=scope_type, scope_id=scope_id)
+    return _normalize_connector_policy(row.policy if row is not None else None)
+
+
+def set_connector_policy(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str | None,
+    scope_type: str,
+    scope_id: str | None = None,
+    policy: Mapping[str, Any] | None = None,
+) -> dict[str, Any]:
+    normalized = _normalize_connector_policy(policy)
+    parent = parent_connector_policy(session, tenant_id=tenant_id, scope_type=scope_type, scope_id=scope_id)
+    if parent is not None:
+        _validate_lower_level_limits(parent, normalized)
+    row_tenant_id, row_scope_type, row_scope_id = _policy_scope_key(tenant_id=tenant_id, scope_type=scope_type, scope_id=scope_id)
+    row = _connector_policy_row(session, tenant_id=tenant_id, scope_type=row_scope_type, scope_id=row_scope_id)
+    if row is None:
+        row = FileConnectorPolicy(
+            tenant_id=row_tenant_id,
+            scope_type=row_scope_type,
+            scope_id=row_scope_id,
+            policy=normalized,
+            created_by_user_id=user_id,
+            updated_by_user_id=user_id,
+        )
+    else:
+        row.policy = normalized
+        row.updated_by_user_id = user_id
+    session.add(row)
+    session.flush()
+    return normalized
+
+
+def connector_policy_response(
+    session: Session,
+    *,
+    tenant_id: str,
+    scope_type: str,
+    scope_id: str | None = None,
+) -> dict[str, Any]:
+    clean_scope_type, clean_scope_id = _policy_scope_ref(tenant_id=tenant_id, scope_type=scope_type, scope_id=scope_id)
+    policy = get_connector_policy(session, tenant_id=tenant_id, scope_type=clean_scope_type, scope_id=clean_scope_id)
+    effective_sources = effective_connector_policy_sources(session, tenant_id=tenant_id, scope_type=clean_scope_type, scope_id=clean_scope_id)
+    parent_policy = parent_connector_policy(session, tenant_id=tenant_id, scope_type=clean_scope_type, scope_id=clean_scope_id)
+    parent_sources = parent_connector_policy_sources(session, tenant_id=tenant_id, scope_type=clean_scope_type, scope_id=clean_scope_id)
+    return {
+        "scope_type": clean_scope_type,
+        "scope_id": clean_scope_id,
+        "policy": policy,
+        "effective_policy": merge_connector_policies(source.policy for source in effective_sources),
+        "parent_policy": parent_policy,
+        "effective_policy_sources": [_source_step(source) for source in effective_sources],
+        "parent_policy_sources": [_source_step(source) for source in parent_sources],
+    }
+
+
+def effective_connector_policy_sources(
+    session: Session,
+    *,
+    tenant_id: str,
+    scope_type: str,
+    scope_id: str | None = None,
+) -> list[ConnectorPolicySource]:
+    clean_scope_type, clean_scope_id = _policy_scope_ref(tenant_id=tenant_id, scope_type=scope_type, scope_id=scope_id)
+    sources: list[ConnectorPolicySource] = []
+    for source_scope_type, source_scope_id in _policy_source_chain(tenant_id=tenant_id, scope_type=clean_scope_type, scope_id=clean_scope_id):
+        row = _connector_policy_row(session, tenant_id=tenant_id, scope_type=source_scope_type, scope_id=source_scope_id)
+        if row is None:
+            continue
+        policy = _normalize_connector_policy(row.policy)
+        if _policy_is_empty(policy):
+            continue
+        sources.append(
+            ConnectorPolicySource(
+                scope_type=source_scope_type,
+                scope_id=source_scope_id,
+                label=_policy_source_label(source_scope_type),
+                policy=policy,
+            )
+        )
+    return sources
+
+
+def parent_connector_policy_sources(
+    session: Session,
+    *,
+    tenant_id: str,
+    scope_type: str,
+    scope_id: str | None = None,
+) -> list[ConnectorPolicySource]:
+    clean_scope_type, clean_scope_id = _policy_scope_ref(tenant_id=tenant_id, scope_type=scope_type, scope_id=scope_id)
+    chain = _policy_source_chain(tenant_id=tenant_id, scope_type=clean_scope_type, scope_id=clean_scope_id)
+    parent_chain = chain[:-1] if chain else []
+    sources: list[ConnectorPolicySource] = []
+    for source_scope_type, source_scope_id in parent_chain:
+        row = _connector_policy_row(session, tenant_id=tenant_id, scope_type=source_scope_type, scope_id=source_scope_id)
+        if row is None:
+            continue
+        policy = _normalize_connector_policy(row.policy)
+        if _policy_is_empty(policy):
+            continue
+        sources.append(
+            ConnectorPolicySource(
+                scope_type=source_scope_type,
+                scope_id=source_scope_id,
+                label=_policy_source_label(source_scope_type),
+                policy=policy,
+            )
+        )
+    return sources
+
+
+def parent_connector_policy(
+    session: Session,
+    *,
+    tenant_id: str,
+    scope_type: str,
+    scope_id: str | None = None,
+) -> dict[str, Any] | None:
+    sources = parent_connector_policy_sources(session, tenant_id=tenant_id, scope_type=scope_type, scope_id=scope_id)
+    if not sources:
+        return None
+    return merge_connector_policies(source.policy for source in sources)
+
+
+def validate_connector_policy_allowed_by_parent(parent_policy: Mapping[str, Any] | None, local_policy: Mapping[str, Any] | None) -> None:
+    if parent_policy is None:
+        return
+    _validate_lower_level_limits(_normalize_connector_policy(parent_policy), _normalize_connector_policy(local_policy))
+
+
+def merge_connector_policies(policies: Iterable[Mapping[str, Any] | None]) -> dict[str, Any]:
+    result = _empty_connector_policy()
+    for policy in policies:
+        normalized = _normalize_connector_policy(policy)
+        for group in _RULE_GROUPS:
+            rules = normalized.get(group) or {}
+            if not isinstance(rules, Mapping):
+                continue
+            target = result[group]
+            for field in CONNECTOR_POLICY_FIELDS:
+                values = _string_list(rules.get(field))
+                if values:
+                    target[field] = _unique([*target.get(field, []), *values])
+        lower = normalized.get("allow_lower_level_limits") or {}
+        if isinstance(lower, Mapping):
+            for key, value in lower.items():
+                if isinstance(value, bool):
+                    result["allow_lower_level_limits"][str(key)] = value
+    return _compact_connector_policy(result, keep_lower=True)
+
+
+def _connector_policy_row(
+    session: Session,
+    *,
+    tenant_id: str,
+    scope_type: str,
+    scope_id: str | None = None,
+) -> FileConnectorPolicy | None:
+    row_tenant_id, row_scope_type, row_scope_id = _policy_scope_key(tenant_id=tenant_id, scope_type=scope_type, scope_id=scope_id)
+    query = session.query(FileConnectorPolicy).filter(FileConnectorPolicy.scope_type == row_scope_type)
+    query = query.filter(FileConnectorPolicy.tenant_id.is_(None) if row_tenant_id is None else FileConnectorPolicy.tenant_id == row_tenant_id)
+    query = query.filter(FileConnectorPolicy.scope_id.is_(None) if row_scope_id is None else FileConnectorPolicy.scope_id == row_scope_id)
+    return query.order_by(FileConnectorPolicy.created_at.asc()).first()
+
+
+def _policy_scope_key(*, tenant_id: str, scope_type: str, scope_id: str | None) -> tuple[str | None, str, str | None]:
+    clean_scope_type, clean_scope_id = _policy_scope_ref(tenant_id=tenant_id, scope_type=scope_type, scope_id=scope_id)
+    if clean_scope_type == "system":
+        return None, "system", None
+    return tenant_id, clean_scope_type, clean_scope_id
+
+
+def _policy_scope_ref(*, tenant_id: str, scope_type: str, scope_id: str | None) -> tuple[str, str | None]:
+    clean_scope_type = normalize_policy_scope_type(scope_type)
+    clean_scope_id = _clean(scope_id)
+    if clean_scope_type == "system":
+        return "system", None
+    if clean_scope_type == "tenant":
+        if clean_scope_id and clean_scope_id != tenant_id:
+            raise FileStorageError("Tenant connector policy scope does not belong to the active tenant")
+        return "tenant", tenant_id
+    if clean_scope_type in {"user", "group", "campaign"}:
+        if not clean_scope_id:
+            raise FileStorageError(f"{clean_scope_type.capitalize()} connector policy requires scope_id")
+        return clean_scope_type, clean_scope_id
+    raise FileStorageError("Unsupported connector policy scope")
+
+
+def _policy_source_chain(*, tenant_id: str, scope_type: str, scope_id: str | None) -> list[tuple[str, str | None]]:
+    chain: list[tuple[str, str | None]] = [("system", None)]
+    if scope_type == "system":
+        return chain
+    chain.append(("tenant", tenant_id))
+    if scope_type == "tenant":
+        return chain
+    chain.append((scope_type, scope_id))
+    return chain
+
+
+def _normalize_connector_policy(policy: Mapping[str, Any] | None) -> dict[str, Any]:
+    if policy is None:
+        return {}
+    if not isinstance(policy, Mapping):
+        raise FileStorageError("Connector policy must be a JSON object")
+    normalized = _empty_connector_policy()
+    for group in _RULE_GROUPS:
+        raw = policy.get(group)
+        if raw is None:
+            raw = policy.get(f"{group}list")
+        if raw is None:
+            raw = policy.get("whitelist" if group == "allow" else "blacklist")
+        if raw is not None and not isinstance(raw, Mapping):
+            raise FileStorageError(f"Connector policy {group} rules must be an object")
+        for field, aliases in _FIELD_ALIASES.items():
+            values: list[str] = []
+            if isinstance(raw, Mapping):
+                for alias in aliases:
+                    values.extend(_string_list(raw.get(alias)))
+            if values:
+                normalized[group][field] = _unique(values)
+    lower = policy.get("allow_lower_level_limits")
+    if lower is not None:
+        if not isinstance(lower, Mapping):
+            raise FileStorageError("Connector policy allow_lower_level_limits must be an object")
+        for key, value in lower.items():
+            clean_key = str(key).strip()
+            if clean_key and isinstance(value, bool):
+                normalized["allow_lower_level_limits"][clean_key] = value
+    return _compact_connector_policy(normalized, keep_lower=True)
+
+
+def _empty_connector_policy() -> dict[str, Any]:
+    return {"allow": {}, "deny": {}, "allow_lower_level_limits": {}}
+
+
+def _compact_connector_policy(policy: dict[str, Any], *, keep_lower: bool = False) -> dict[str, Any]:
+    compact: dict[str, Any] = {}
+    for group in _RULE_GROUPS:
+        rules = {field: _unique(_string_list(values)) for field, values in (policy.get(group) or {}).items()}
+        rules = {field: values for field, values in rules.items() if values}
+        if rules:
+            compact[group] = rules
+    lower = policy.get("allow_lower_level_limits") or {}
+    if isinstance(lower, Mapping):
+        lower_compact = {str(key): bool(value) for key, value in lower.items() if isinstance(value, bool)}
+        if lower_compact or keep_lower:
+            compact["allow_lower_level_limits"] = lower_compact
+    return compact
+
+
+def _policy_is_empty(policy: Mapping[str, Any]) -> bool:
+    return not connector_policy_applied_fields(policy) and not bool(policy.get("allow_lower_level_limits"))
+
+
+def _source_step(source: ConnectorPolicySource) -> dict[str, Any]:
+    return source.source_step(connector_policy_applied_fields(source.policy)).to_dict()
+
+
+def _policy_source_label(scope_type: str) -> str:
+    if scope_type == "system":
+        return "System connector policy"
+    if scope_type == "tenant":
+        return "Tenant connector policy"
+    return f"{scope_type.capitalize()} connector policy"
+
+
+def _validate_lower_level_limits(parent_policy: Mapping[str, Any], local_policy: Mapping[str, Any]) -> None:
+    limits = parent_policy.get("allow_lower_level_limits")
+    if not isinstance(limits, Mapping):
+        return
+    for field in connector_policy_applied_fields(local_policy):
+        allowed = limits.get(field)
+        if allowed is False:
+            raise FileStorageError(f"Parent connector policy does not allow lower-level {field} limits")
+
+
+def _string_list(value: object) -> list[str]:
+    if value is None:
+        return []
+    if isinstance(value, str):
+        clean = value.strip()
+        return [clean] if clean else []
+    if isinstance(value, Iterable) and not isinstance(value, (str, bytes, bytearray, Mapping)):
+        return [str(item).strip() for item in value if str(item).strip()]
+    return [str(value).strip()] if str(value).strip() else []
+
+
+def _unique(values: Iterable[str]) -> list[str]:
+    return list(dict.fromkeys(value for value in values if value))
+
+
+def _clean(value: object) -> str | None:
+    if value is None:
+        return None
+    text = str(value).strip()
+    return text or None

src/govoplan_files/backend/storage/connector_profile_store.py

@@ -0,0 +1,470 @@
+from __future__ import annotations
+
+from collections.abc import Callable, Mapping
+from typing import Any
+
+from sqlalchemy.orm import Session
+
+from govoplan_core.core.policy import normalize_policy_scope_type
+from govoplan_core.security.secrets import decrypt_secret, encrypt_secret
+from govoplan_files.backend.db.models import FileConnectorCredential, FileConnectorProfile
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.connector_deployment import reject_api_controlled_deployment_references
+from govoplan_files.backend.storage.connector_credential_store import (
+    ConnectorCredential,
+    connector_credential_from_row,
+    credential_rows_by_id,
+    resolve_reusable_connector_credential,
+    reusable_credential_id,
+)
+from govoplan_files.backend.storage.connector_policy import connector_policy_sources_from_payload
+from govoplan_files.backend.storage.connector_profiles import ConnectorProfile, supported_connector_providers
+
+
+def list_database_connector_profiles(
+    session: Session,
+    *,
+    tenant_id: str,
+    include_disabled: bool = False,
+    row_visible: Callable[[FileConnectorProfile], bool] | None = None,
+) -> list[ConnectorProfile]:
+    profiles, _profile_ids = select_database_connector_profiles(
+        session,
+        tenant_id=tenant_id,
+        include_disabled=include_disabled,
+        row_visible=row_visible,
+    )
+    return profiles
+
+
+def select_database_connector_profiles(
+    session: Session,
+    *,
+    tenant_id: str,
+    include_disabled: bool = False,
+    row_visible: Callable[[FileConnectorProfile], bool] | None = None,
+) -> tuple[list[ConnectorProfile], set[str]]:
+    """Return visible profiles and every database id that shadows settings."""
+
+    query = session.query(FileConnectorProfile).filter(
+        (FileConnectorProfile.scope_type == "system")
+        | (FileConnectorProfile.tenant_id == tenant_id)
+    )
+    if not include_disabled:
+        query = query.filter(FileConnectorProfile.enabled.is_(True))
+    rows = query.order_by(FileConnectorProfile.scope_type.asc(), FileConnectorProfile.label.asc()).all()
+    profile_ids = {row.id for row in rows}
+    if row_visible is not None:
+        rows = [row for row in rows if row_visible(row)]
+    credential_ids = {
+        _clean(row.credential_profile_id)
+        for row in rows
+        if _clean(row.credential_profile_id) and not reusable_credential_id(row.credential_profile_id)
+    }
+    credentials = credential_rows_by_id(session, tenant_id=tenant_id, credential_ids={item for item in credential_ids if item}, include_disabled=include_disabled)
+    return (
+        [
+            connector_profile_from_row(
+                row,
+                credential_row=(
+                    _resolve_profile_reusable_credential(
+                        session,
+                        tenant_id=tenant_id,
+                        row=row,
+                    )
+                    if reusable_credential_id(row.credential_profile_id)
+                    else credentials.get(row.credential_profile_id or "")
+                ),
+            )
+            for row in rows
+        ],
+        profile_ids,
+    )
+
+
+def list_connector_profile_rows(
+    session: Session,
+    *,
+    tenant_id: str,
+    include_disabled: bool = False,
+) -> list[FileConnectorProfile]:
+    query = session.query(FileConnectorProfile).filter(
+        (FileConnectorProfile.scope_type == "system")
+        | (FileConnectorProfile.tenant_id == tenant_id)
+    )
+    if not include_disabled:
+        query = query.filter(FileConnectorProfile.enabled.is_(True))
+    return query.order_by(FileConnectorProfile.scope_type.asc(), FileConnectorProfile.label.asc()).all()
+
+
+def connector_profile_from_row(
+    row: FileConnectorProfile,
+    credential_row: FileConnectorCredential | ConnectorCredential | None = None,
+) -> ConnectorProfile:
+    policy_sources = []
+    if row.policy:
+        policy_sources = connector_policy_sources_from_payload({
+            "scope_type": row.scope_type,
+            "scope_id": row.scope_id,
+            "label": row.label,
+            "policy": row.policy,
+        })
+    credential = (
+        credential_row
+        if isinstance(credential_row, ConnectorCredential)
+        else connector_credential_from_row(credential_row)
+        if credential_row is not None
+        else None
+    )
+    if credential:
+        policy_sources.extend(credential.policy_sources)
+    metadata = dict(row.metadata_ or {})
+    if reusable_credential_id(row.credential_profile_id) and credential is None:
+        metadata["credential_unavailable"] = True
+    return ConnectorProfile(
+        id=row.id,
+        label=row.label,
+        provider=row.provider,
+        scope_type=row.scope_type,
+        scope_id=row.scope_id,
+        endpoint_url=row.endpoint_url,
+        base_path=row.base_path,
+        enabled=row.enabled,
+        credential_profile_id=row.credential_profile_id,
+        credential_profile_label=credential.label if credential else None,
+        credential_mode=credential.credential_mode if credential else row.credential_mode,
+        username=credential.username if credential else row.username,
+        password_env=credential.password_env if credential else row.password_env,
+        token_env=credential.token_env if credential else row.token_env,
+        secret_ref=credential.secret_ref if credential else row.secret_ref,
+        password_value=credential.password_value if credential else decrypt_secret(row.password_encrypted),
+        token_value=credential.token_value if credential else decrypt_secret(row.token_encrypted),
+        capabilities=tuple(_string_list(row.capabilities)),
+        policy_sources=tuple(policy_sources),
+        metadata=metadata,
+        source_kind="database",
+    )
+
+
+def _resolve_profile_reusable_credential(
+    session: Session,
+    *,
+    tenant_id: str,
+    row: FileConnectorProfile,
+) -> ConnectorCredential | None:
+    try:
+        return resolve_reusable_connector_credential(
+            session,
+            tenant_id=tenant_id,
+            credential_ref=row.credential_profile_id or "",
+            profile_id=row.id,
+            scope_type=row.scope_type,
+            scope_id=row.scope_id,
+        )
+    except FileStorageError:
+        return None
+
+
+def get_connector_profile_row(
+    session: Session,
+    *,
+    tenant_id: str,
+    profile_id: str,
+    include_disabled: bool = False,
+) -> FileConnectorProfile:
+    row = session.get(FileConnectorProfile, profile_id)
+    if row is None or (row.scope_type != "system" and row.tenant_id != tenant_id):
+        raise FileStorageError("Connector profile not found")
+    if not include_disabled and not row.enabled:
+        raise FileStorageError("Connector profile not found")
+    return row
+
+
+def create_connector_profile_row(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str | None,
+    profile_id: str,
+    label: str,
+    provider: str,
+    scope_type: str,
+    scope_id: str | None = None,
+    endpoint_url: str | None = None,
+    base_path: str | None = None,
+    enabled: bool = True,
+    credential_profile_id: str | None = None,
+    credential_mode: str = "none",
+    username: str | None = None,
+    password: str | None = None,
+    token: str | None = None,
+    password_env: str | None = None,
+    token_env: str | None = None,
+    secret_ref: str | None = None,
+    capabilities: list[str] | None = None,
+    policy: Mapping[str, Any] | None = None,
+    metadata: Mapping[str, Any] | None = None,
+) -> FileConnectorProfile:
+    reject_api_controlled_deployment_references(
+        password_env=password_env,
+        token_env=token_env,
+        secret_ref=secret_ref,
+        metadata=metadata,
+    )
+    clean_id = _normalize_profile_id(profile_id)
+    if session.get(FileConnectorProfile, clean_id) is not None:
+        raise FileStorageError(f"Connector profile already exists: {clean_id}")
+    clean_scope_type, clean_scope_id, row_tenant_id = _normalize_scope(tenant_id=tenant_id, scope_type=scope_type, scope_id=scope_id)
+    row = FileConnectorProfile(
+        id=clean_id,
+        tenant_id=row_tenant_id,
+        scope_type=clean_scope_type,
+        scope_id=clean_scope_id,
+        label=_normalize_label(label),
+        provider=_normalize_provider(provider),
+        endpoint_url=_clean(endpoint_url),
+        base_path=_clean(base_path),
+        enabled=bool(enabled),
+        credential_profile_id=_clean(credential_profile_id),
+        credential_mode=_normalize_credential_mode(credential_mode),
+        username=_clean(username),
+        password_encrypted=encrypt_secret(_clean(password)),
+        token_encrypted=encrypt_secret(_clean(token)),
+        password_env=_clean(password_env),
+        token_env=_clean(token_env),
+        secret_ref=_clean(secret_ref),
+        capabilities=_string_list(capabilities),
+        policy=dict(policy or {}),
+        metadata_=dict(metadata or {}),
+        created_by_user_id=user_id,
+        updated_by_user_id=user_id,
+    )
+    session.add(row)
+    session.flush()
+    return row
+
+
+def update_connector_profile_row(
+    session: Session,
+    row: FileConnectorProfile,
+    *,
+    user_id: str | None,
+    label: str | None = None,
+    provider: str | None = None,
+    endpoint_url: str | None = None,
+    base_path: str | None = None,
+    enabled: bool | None = None,
+    credential_profile_id: str | None = None,
+    credential_mode: str | None = None,
+    username: str | None = None,
+    password: str | None = None,
+    token: str | None = None,
+    password_env: str | None = None,
+    token_env: str | None = None,
+    secret_ref: str | None = None,
+    capabilities: list[str] | None = None,
+    policy: Mapping[str, Any] | None = None,
+    metadata: Mapping[str, Any] | None = None,
+    clear_password: bool = False,
+    clear_token: bool = False,
+) -> FileConnectorProfile:
+    _validate_profile_update_references(
+        row,
+        password_env=password_env,
+        token_env=token_env,
+        secret_ref=secret_ref,
+        metadata=metadata,
+    )
+    _update_profile_connection_fields(
+        row,
+        label=label,
+        provider=provider,
+        endpoint_url=endpoint_url,
+        base_path=base_path,
+        enabled=enabled,
+        credential_profile_id=credential_profile_id,
+        credential_mode=credential_mode,
+    )
+    _update_profile_credential_fields(
+        row,
+        username=username,
+        password=password,
+        token=token,
+        password_env=password_env,
+        token_env=token_env,
+        secret_ref=secret_ref,
+        clear_password=clear_password,
+        clear_token=clear_token,
+    )
+    _update_profile_governance_fields(
+        row,
+        capabilities=capabilities,
+        policy=policy,
+        metadata=metadata,
+    )
+    row.updated_by_user_id = user_id
+    session.add(row)
+    session.flush()
+    return row
+
+
+def _validate_profile_update_references(
+    row: FileConnectorProfile,
+    *,
+    password_env: str | None,
+    token_env: str | None,
+    secret_ref: str | None,
+    metadata: Mapping[str, Any] | None,
+) -> None:
+    reject_api_controlled_deployment_references(
+        password_env=password_env,
+        token_env=token_env,
+        secret_ref=secret_ref,
+        metadata=metadata,
+    )
+    if secret_ref is None or _clean(secret_ref) == _clean(row.secret_ref):
+        return
+    if _clean(row.secret_ref):
+        raise FileStorageError(
+            "An existing external secret reference cannot be replaced or cleared until Files can prove "
+            "provider ownership and confirm provider-side deletion"
+        )
+
+
+def _update_profile_connection_fields(
+    row: FileConnectorProfile,
+    *,
+    label: str | None,
+    provider: str | None,
+    endpoint_url: str | None,
+    base_path: str | None,
+    enabled: bool | None,
+    credential_profile_id: str | None,
+    credential_mode: str | None,
+) -> None:
+    if label is not None:
+        row.label = _normalize_label(label)
+    if provider is not None:
+        row.provider = _normalize_provider(provider)
+    if endpoint_url is not None:
+        row.endpoint_url = _clean(endpoint_url)
+    if base_path is not None:
+        row.base_path = _clean(base_path)
+    if enabled is not None:
+        row.enabled = bool(enabled)
+    if credential_profile_id is not None:
+        row.credential_profile_id = _clean(credential_profile_id)
+    if credential_mode is not None:
+        row.credential_mode = _normalize_credential_mode(credential_mode)
+
+
+def _update_profile_credential_fields(
+    row: FileConnectorProfile,
+    *,
+    username: str | None,
+    password: str | None,
+    token: str | None,
+    password_env: str | None,
+    token_env: str | None,
+    secret_ref: str | None,
+    clear_password: bool,
+    clear_token: bool,
+) -> None:
+    if username is not None:
+        row.username = _clean(username)
+    if password is not None:
+        row.password_encrypted = encrypt_secret(_clean(password))
+    elif clear_password:
+        row.password_encrypted = None
+    if token is not None:
+        row.token_encrypted = encrypt_secret(_clean(token))
+    elif clear_token:
+        row.token_encrypted = None
+    if password_env is not None:
+        row.password_env = _clean(password_env)
+    if token_env is not None:
+        row.token_env = _clean(token_env)
+    if secret_ref is not None:
+        row.secret_ref = _clean(secret_ref)
+
+
+def _update_profile_governance_fields(
+    row: FileConnectorProfile,
+    *,
+    capabilities: list[str] | None,
+    policy: Mapping[str, Any] | None,
+    metadata: Mapping[str, Any] | None,
+) -> None:
+    if capabilities is not None:
+        row.capabilities = _string_list(capabilities)
+    if policy is not None:
+        row.policy = dict(policy)
+    if metadata is not None:
+        row.metadata_ = dict(metadata)
+
+
+def _normalize_scope(*, tenant_id: str, scope_type: str, scope_id: str | None) -> tuple[str, str | None, str | None]:
+    clean_scope_type = normalize_policy_scope_type(scope_type)
+    clean_scope_id = _clean(scope_id)
+    if clean_scope_type == "system":
+        return "system", None, None
+    if clean_scope_type == "tenant":
+        return "tenant", tenant_id, tenant_id
+    if clean_scope_type in {"user", "group", "campaign"}:
+        if not clean_scope_id:
+            raise FileStorageError(f"{clean_scope_type.capitalize()} connector profiles require scope_id")
+        return clean_scope_type, clean_scope_id, tenant_id
+    raise FileStorageError("Unsupported connector profile scope")
+
+
+def _normalize_profile_id(value: str) -> str:
+    clean = _clean(value)
+    if not clean:
+        raise FileStorageError("Connector profile id is required")
+    if len(clean) > 255:
+        raise FileStorageError("Connector profile id is too long")
+    if any(char.isspace() for char in clean):
+        raise FileStorageError("Connector profile id cannot contain whitespace")
+    return clean
+
+
+def _normalize_label(value: str) -> str:
+    clean = value.strip()
+    if not clean:
+        raise FileStorageError("Connector profile label is required")
+    if len(clean) > 255:
+        raise FileStorageError("Connector profile label is too long")
+    return clean
+
+
+def _normalize_provider(value: str) -> str:
+    clean = value.strip().casefold()
+    if clean not in supported_connector_providers():
+        raise FileStorageError(f"Unsupported connector provider: {value}")
+    return clean
+
+
+def _normalize_credential_mode(value: str) -> str:
+    clean = value.strip().casefold() or "none"
+    if clean not in {"none", "anonymous", "basic", "token", "secret_ref"}:
+        raise FileStorageError(f"Unsupported connector credential mode: {value}")
+    return clean
+
+
+def _string_list(value: object) -> list[str]:
+    if value is None:
+        return []
+    if isinstance(value, str):
+        values = value.split(",")
+    elif isinstance(value, (list, tuple, set)):
+        values = value
+    else:
+        values = [value]
+    return [str(item).strip() for item in values if str(item).strip()]
+
+
+def _clean(value: object) -> str | None:
+    if value is None:
+        return None
+    text = str(value).strip()
+    return text or None

src/govoplan_files/backend/storage/connector_profiles.py

@@ -0,0 +1,343 @@
+from __future__ import annotations
+
+import json
+import os
+from collections.abc import Iterable, Mapping
+from dataclasses import dataclass, field
+from typing import Any
+
+from govoplan_core.core.policy import normalize_policy_scope_type, policy_source_path
+from govoplan_files.backend.storage.connector_deployment import (
+    connector_secret_env_available,
+    validate_deployment_connector_references,
+)
+from govoplan_files.backend.storage.connector_policy import ConnectorPolicySource, connector_policy_sources_from_payload
+
+
+_ENV_JSON_KEYS = ("GOVOPLAN_FILES_CONNECTOR_PROFILES_JSON", "FILES_CONNECTOR_PROFILES_JSON")
+_ENV_FILE_KEYS = ("GOVOPLAN_FILES_CONNECTOR_PROFILES_FILE", "FILES_CONNECTOR_PROFILES_FILE")
+_SUPPORTED_PROVIDERS = {"seafile", "nextcloud", "webdav", "smb", "s3", "sharepoint", "onedrive", "nfs", "dms", "generic"}
+_INLINE_SECRET_FIELDS = (
+    "password",
+    "token",
+    "api_key",
+    "access_key",
+    "access_key_id",
+    "secret_key",
+    "secret_access_key",
+    "session_token",
+)
+
+
+def supported_connector_providers() -> set[str]:
+    return set(_SUPPORTED_PROVIDERS)
+
+
+@dataclass(frozen=True, slots=True)
+class ConnectorProfile:
+    id: str
+    label: str
+    provider: str
+    scope_type: str = "system"
+    scope_id: str | None = None
+    endpoint_url: str | None = None
+    base_path: str | None = None
+    enabled: bool = True
+    credential_profile_id: str | None = None
+    credential_profile_label: str | None = None
+    credential_mode: str = "none"
+    username: str | None = None
+    password_env: str | None = None
+    token_env: str | None = None
+    secret_ref: str | None = None
+    password_value: str | None = field(default=None, repr=False)
+    token_value: str | None = field(default=None, repr=False)
+    has_inline_secret: bool = False
+    capabilities: tuple[str, ...] = ()
+    policy_sources: tuple[ConnectorPolicySource, ...] = ()
+    metadata: Mapping[str, Any] = field(default_factory=dict)
+    source_kind: str = "settings"
+
+    @property
+    def source_path(self) -> str:
+        return policy_source_path(self.scope_type, self.scope_id)
+
+    @property
+    def credential_source(self) -> str | None:
+        if self.credential_profile_id:
+            return "credential_profile"
+        if self.secret_ref:
+            return "secret_ref"
+        if self.token_value or self.password_value:
+            return "stored"
+        if self.token_env:
+            return "token_env"
+        if self.password_env:
+            return "password_env"
+        if self.has_inline_secret:
+            return "inline"
+        return None
+
+    @property
+    def credentials_configured(self) -> bool:
+        if not self.enabled:
+            return False
+        mode = self.credential_mode.casefold()
+        if mode in {"", "none", "anonymous"}:
+            return True
+        if self.secret_ref or self.has_inline_secret or self.password_value or self.token_value:
+            return True
+        if self.token_env:
+            return connector_secret_env_available(self.token_env, source_kind=self.source_kind)
+        if self.password_env:
+            return connector_secret_env_available(self.password_env, source_kind=self.source_kind)
+        return False
+
+    def to_response(self) -> dict[str, Any]:
+        return {
+            "id": self.id,
+            "label": self.label,
+            "provider": self.provider,
+            "endpoint_url": self.endpoint_url,
+            "base_path": self.base_path,
+            "enabled": self.enabled,
+            "scope_type": self.scope_type,
+            "scope_id": self.scope_id,
+            "source_path": self.source_path,
+            "credential_profile_id": self.credential_profile_id,
+            "credential_profile_label": self.credential_profile_label,
+            "credential_mode": self.credential_mode,
+            "credential_source": self.credential_source,
+            "credentials_configured": self.credentials_configured,
+            "username": self.username,
+            "capabilities": list(self.capabilities),
+            "policy_sources": [_policy_source_response(source) for source in self.policy_sources],
+            "metadata": _response_metadata(self.metadata),
+            "source_kind": self.source_kind,
+        }
+
+
+def connector_profiles_from_settings(settings: object | None = None) -> list[ConnectorProfile]:
+    raw = _raw_profiles_payload(settings)
+    if raw in (None, ""):
+        return []
+    payload = json.loads(raw) if isinstance(raw, str) else raw
+    return connector_profiles_from_payload(payload)
+
+
+def connector_profiles_from_payload(value: object) -> list[ConnectorProfile]:
+    if isinstance(value, Mapping):
+        raw_profiles = value.get("profiles", [])
+    elif isinstance(value, list):
+        raw_profiles = value
+    else:
+        raise ValueError("Connector profiles must be a JSON object with profiles or a list")
+    if not isinstance(raw_profiles, list):
+        raise ValueError("Connector profiles payload requires a profiles list")
+    return [_profile_from_mapping(item) for item in raw_profiles if isinstance(item, Mapping)]
+
+
+def _profile_from_mapping(value: Mapping[str, Any]) -> ConnectorProfile:
+    profile_id = _profile_id_from_mapping(value)
+    provider = _provider_from_mapping(value)
+    scope_type, scope_id = _scope_from_mapping(value)
+    credentials = _credentials_from_mapping(value)
+    mode = _clean(value.get("credential_mode") or value.get("auth_type") or credentials.get("mode") or credentials.get("type")) or "none"
+    profile = _profile_from_normalized_mapping(
+        value,
+        profile_id=profile_id,
+        provider=provider,
+        scope_type=scope_type,
+        scope_id=scope_id,
+        credential_mode=mode,
+        credentials=credentials,
+    )
+    result = ConnectorProfile(
+        id=profile.id,
+        label=profile.label,
+        provider=profile.provider,
+        scope_type=profile.scope_type,
+        scope_id=profile.scope_id,
+        endpoint_url=profile.endpoint_url,
+        base_path=profile.base_path,
+        enabled=profile.enabled,
+        credential_profile_id=profile.credential_profile_id,
+        credential_profile_label=profile.credential_profile_label,
+        credential_mode=profile.credential_mode,
+        username=profile.username,
+        password_env=profile.password_env,
+        token_env=profile.token_env,
+        secret_ref=profile.secret_ref,
+        password_value=profile.password_value,
+        token_value=profile.token_value,
+        has_inline_secret=profile.has_inline_secret,
+        capabilities=profile.capabilities,
+        policy_sources=tuple(_policy_sources_from_profile(value, profile)),
+        metadata=profile.metadata,
+        source_kind="settings",
+    )
+    validate_deployment_connector_references(
+        source_kind=result.source_kind,
+        password_env=result.password_env,
+        token_env=result.token_env,
+        metadata=result.metadata,
+    )
+    return result
+
+
+def _profile_id_from_mapping(value: Mapping[str, Any]) -> str:
+    profile_id = _clean(value.get("id") or value.get("connector_id") or value.get("name"))
+    if not profile_id:
+        raise ValueError("Connector profiles require id")
+    return profile_id
+
+
+def _provider_from_mapping(value: Mapping[str, Any]) -> str:
+    provider = (_clean(value.get("provider") or value.get("type")) or "generic").casefold()
+    if provider not in _SUPPORTED_PROVIDERS:
+        raise ValueError(f"Unsupported connector provider: {provider}")
+    return provider
+
+
+def _scope_from_mapping(value: Mapping[str, Any]) -> tuple[str, str | None]:
+    scope_type = normalize_policy_scope_type(str(value.get("scope_type") or "system"))
+    scope_id = _clean(value.get("scope_id"))
+    if scope_type == "system":
+        return scope_type, None
+    if not scope_id:
+        raise ValueError(f"{scope_type} connector profiles require scope_id")
+    return scope_type, scope_id
+
+
+def _credentials_from_mapping(value: Mapping[str, Any]) -> Mapping[str, Any]:
+    credentials = value.get("credentials")
+    return credentials if isinstance(credentials, Mapping) else {}
+
+
+def _profile_from_normalized_mapping(
+    value: Mapping[str, Any],
+    *,
+    profile_id: str,
+    provider: str,
+    scope_type: str,
+    scope_id: str | None,
+    credential_mode: str,
+    credentials: Mapping[str, Any],
+) -> ConnectorProfile:
+    return ConnectorProfile(
+        id=profile_id,
+        label=_clean(value.get("label") or value.get("name")) or profile_id,
+        provider=provider,
+        endpoint_url=_clean(value.get("endpoint_url") or value.get("base_url") or value.get("url")),
+        base_path=_clean(value.get("base_path") or value.get("path") or value.get("root")),
+        enabled=_bool(value.get("enabled"), default=True),
+        scope_type=scope_type,
+        scope_id=scope_id,
+        credential_profile_id=_clean(value.get("credential_profile_id") or value.get("credential_id")),
+        credential_profile_label=_clean(value.get("credential_profile_label") or value.get("credential_label")),
+        credential_mode=credential_mode,
+        username=_clean(value.get("username") or credentials.get("username")),
+        password_env=_clean(value.get("password_env") or credentials.get("password_env")),
+        token_env=_clean(value.get("token_env") or credentials.get("token_env")),
+        secret_ref=_clean(value.get("secret_ref") or credentials.get("secret_ref")),
+        password_value=_clean(value.get("password") or credentials.get("password")),
+        token_value=_clean(value.get("token") or credentials.get("token")),
+        has_inline_secret=any(_clean(value.get(field) or credentials.get(field)) for field in _INLINE_SECRET_FIELDS),
+        capabilities=tuple(_string_list(value.get("capabilities"))),
+        metadata=_public_metadata(value.get("metadata")),
+    )
+
+
+def _raw_profiles_payload(settings: object | None) -> object:
+    for key in _ENV_JSON_KEYS:
+        value = os.environ.get(key)
+        if value:
+            return value
+    for key in _ENV_FILE_KEYS:
+        path = os.environ.get(key)
+        if path:
+            with open(path, encoding="utf-8") as handle:
+                return handle.read()
+    if settings is not None:
+        value = getattr(settings, "files_connector_profiles_json", None)
+        if value:
+            return value
+        value = getattr(settings, "files_connector_profiles", None)
+        if value:
+            return value
+    return None
+
+
+def _policy_sources_from_profile(value: Mapping[str, Any], profile: ConnectorProfile) -> list[ConnectorPolicySource]:
+    raw_sources: list[Mapping[str, Any]] = []
+    policy = value.get("policy")
+    if isinstance(policy, Mapping):
+        raw_sources.append({
+            "scope_type": profile.scope_type,
+            "scope_id": profile.scope_id,
+            "label": profile.label,
+            "policy": policy,
+        })
+    configured_sources = value.get("policy_sources") or value.get("connector_policy_sources")
+    if configured_sources is not None:
+        raw = connector_policy_sources_from_payload(configured_sources)
+        raw_sources.extend(_policy_source_response(source) for source in raw)
+    return connector_policy_sources_from_payload(raw_sources)
+
+
+def _policy_source_response(source: ConnectorPolicySource) -> dict[str, Any]:
+    return {
+        "scope_type": source.scope_type,
+        "scope_id": source.scope_id,
+        "label": source.label,
+        "policy": dict(source.policy or {}),
+    }
+
+
+def _public_metadata(value: object) -> Mapping[str, Any]:
+    if not isinstance(value, Mapping):
+        return {}
+    return {
+        str(key): item
+        for key, item in value.items()
+        if str(key).strip().casefold() not in _INLINE_SECRET_FIELDS
+    }
+
+
+def _response_metadata(value: Mapping[str, Any]) -> dict[str, Any]:
+    return {
+        str(key): item
+        for key, item in value.items()
+        if str(key).strip().casefold() not in _INLINE_SECRET_FIELDS
+        and not str(key).strip().casefold().endswith("_env")
+        and str(key).strip().casefold() != "ca_bundle"
+    }
+
+
+def _string_list(value: object) -> list[str]:
+    if value is None:
+        return []
+    if isinstance(value, str):
+        values: Iterable[object] = value.split(",")
+    elif isinstance(value, Iterable) and not isinstance(value, (bytes, bytearray, Mapping)):
+        values = value
+    else:
+        values = (value,)
+    return [str(item).strip() for item in values if str(item).strip()]
+
+
+def _bool(value: object, *, default: bool) -> bool:
+    if value is None:
+        return default
+    if isinstance(value, bool):
+        return value
+    if isinstance(value, str):
+        return value.strip().casefold() not in {"0", "false", "no", "off"}
+    return bool(value)
+
+
+def _clean(value: object) -> str | None:
+    if value is None:
+        return None
+    text = str(value).strip()
+    return text or None

src/govoplan_files/backend/storage/connector_providers.py

@@ -0,0 +1,191 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from importlib.util import find_spec
+
+
+CONNECTOR_PROVIDER_CAPABILITY = "files.connector.providers"
+
+
+@dataclass(frozen=True, slots=True)
+class ConnectorProviderDescriptor:
+    provider: str
+    label: str
+    protocol: str
+    implemented: bool
+    browse_supported: bool
+    import_supported: bool
+    optional_dependency: str | None
+    permission_model: str
+    sync_strategy: str
+    conflict_strategy: str
+    preview_strategy: str
+    audit_events: tuple[str, ...]
+    notes: str | None = None
+
+    def to_response(self) -> dict[str, object]:
+        return {
+            "provider": self.provider,
+            "label": self.label,
+            "protocol": self.protocol,
+            "implemented": self.implemented,
+            "installed": self.installed,
+            "browse_supported": self.browse_supported,
+            "import_supported": self.import_supported,
+            "write_supported": self.provider == "s3",
+            "optional_dependency": self.optional_dependency,
+            "permission_model": self.permission_model,
+            "sync_strategy": self.sync_strategy,
+            "conflict_strategy": self.conflict_strategy,
+            "preview_strategy": self.preview_strategy,
+            "audit_events": list(self.audit_events),
+            "notes": self.notes,
+        }
+
+    @property
+    def installed(self) -> bool:
+        if self.optional_dependency is None:
+            return self.implemented
+        return find_spec(self.optional_dependency) is not None
+
+
+def connector_provider_descriptors() -> tuple[ConnectorProviderDescriptor, ...]:
+    freeze_model = "Imported or synced connector files become managed GovOPlaN files with frozen blob/version provenance."
+    governed_permissions = "GovOPlaN profile scope and connector policy are enforced before browse/import/sync; remote ACLs are still evaluated by the upstream service."
+    return (
+        ConnectorProviderDescriptor(
+            provider="seafile",
+            label="Seafile",
+            protocol="seafile-api",
+            implemented=True,
+            browse_supported=True,
+            import_supported=True,
+            optional_dependency=None,
+            permission_model=governed_permissions,
+            sync_strategy="On-demand browse/import/sync; sync updates the managed file version when source content changes and never mutates the remote source.",
+            conflict_strategy="Managed import/sync uses existing files conflict_strategy handling: reject, overwrite, or rename.",
+            preview_strategy="Previews are generated from the frozen managed file after import or sync.",
+            audit_events=("files.connector.imported", "files.connector.synced", "files.connector.accessed"),
+            notes="Native account-token API for libraries, directories, file detail, and download-link import; WebDAV opt-in remains available.",
+        ),
+        ConnectorProviderDescriptor(
+            provider="nextcloud",
+            label="Nextcloud",
+            protocol="webdav",
+            implemented=True,
+            browse_supported=True,
+            import_supported=True,
+            optional_dependency=None,
+            permission_model=governed_permissions,
+            sync_strategy="On-demand WebDAV browse/import/sync; sync updates the managed file version when source content changes and never mutates the remote source.",
+            conflict_strategy="Managed import/sync uses existing files conflict_strategy handling: reject, overwrite, or rename.",
+            preview_strategy="Previews are generated from the frozen managed file after import or sync.",
+            audit_events=("files.connector.imported", "files.connector.synced", "files.connector.accessed"),
+            notes="Uses the configured Nextcloud WebDAV endpoint, basic auth, or bearer token profile credentials.",
+        ),
+        ConnectorProviderDescriptor(
+            provider="webdav",
+            label="WebDAV",
+            protocol="webdav",
+            implemented=True,
+            browse_supported=True,
+            import_supported=True,
+            optional_dependency=None,
+            permission_model=governed_permissions,
+            sync_strategy="On-demand WebDAV browse/import/sync; sync updates the managed file version when source content changes and never mutates the remote source.",
+            conflict_strategy="Managed import/sync uses existing files conflict_strategy handling: reject, overwrite, or rename.",
+            preview_strategy="Previews are generated from the frozen managed file after import or sync.",
+            audit_events=("files.connector.imported", "files.connector.synced", "files.connector.accessed"),
+            notes="Generic WebDAV provider for standards-compatible stores.",
+        ),
+        ConnectorProviderDescriptor(
+            provider="smb",
+            label="SMB",
+            protocol="smb",
+            implemented=True,
+            browse_supported=True,
+            import_supported=True,
+            optional_dependency="smbprotocol",
+            permission_model=governed_permissions,
+            sync_strategy="On-demand browse/import/sync over administrator-declared shares; sync updates managed versions and never mutates the remote share.",
+            conflict_strategy="Managed import/sync uses existing files conflict_strategy handling after download.",
+            preview_strategy="Previews are generated from the frozen managed file after import or sync, not directly from the share.",
+            audit_events=("files.connector.imported", "files.connector.synced", "files.connector.accessed"),
+            notes="Initial sessions, reconnects, aliases, and DFS referral targets use the Files-owned pinned smbprotocol transport and the deployment-wide private-network policy.",
+        ),
+        ConnectorProviderDescriptor(
+            provider="s3",
+            label="S3-compatible object storage",
+            protocol="s3-api",
+            implemented=True,
+            browse_supported=True,
+            import_supported=True,
+            optional_dependency="boto3",
+            permission_model=governed_permissions,
+            sync_strategy="On-demand bucket/prefix browse and object import/sync; sync updates managed versions and never mutates the remote bucket.",
+            conflict_strategy="Managed import/sync uses existing files conflict_strategy handling after object download.",
+            preview_strategy="Previews are generated from the frozen managed file after import or sync, not directly from the bucket.",
+            audit_events=("files.connector.imported", "files.connector.synced", "files.connector.accessed"),
+            notes="Every botocore connection pool uses the Files-owned pinned transport, including retries, redirects, endpoint discovery, and virtual-host aliases; outbound proxies and ambient credential discovery are disabled.",
+        ),
+        ConnectorProviderDescriptor(
+            provider="sharepoint",
+            label="SharePoint",
+            protocol="microsoft-graph/sharepoint",
+            implemented=False,
+            browse_supported=False,
+            import_supported=False,
+            optional_dependency=None,
+            permission_model=governed_permissions,
+            sync_strategy="Planned read-only browse/import through deployment-managed Microsoft Graph or SharePoint credentials.",
+            conflict_strategy=freeze_model,
+            preview_strategy="Will preview from frozen managed file after import, not directly from SharePoint.",
+            audit_events=("files.connector.imported", "files.connector.synced", "files.connector.accessed"),
+            notes="Provider/profile key is reserved; live browsing/import still needs Graph/SharePoint authentication and paging implementation.",
+        ),
+        ConnectorProviderDescriptor(
+            provider="onedrive",
+            label="OneDrive",
+            protocol="microsoft-graph/onedrive",
+            implemented=False,
+            browse_supported=False,
+            import_supported=False,
+            optional_dependency=None,
+            permission_model=governed_permissions,
+            sync_strategy="Planned read-only browse/import through deployment-managed Microsoft Graph credentials.",
+            conflict_strategy=freeze_model,
+            preview_strategy="Will preview from frozen managed file after import, not directly from OneDrive.",
+            audit_events=("files.connector.imported", "files.connector.synced", "files.connector.accessed"),
+            notes="Provider/profile key is reserved; live browsing/import still needs Graph drive selection, OAuth/app registration, and paging implementation.",
+        ),
+        ConnectorProviderDescriptor(
+            provider="nfs",
+            label="NFS",
+            protocol="nfs",
+            implemented=False,
+            browse_supported=False,
+            import_supported=False,
+            optional_dependency=None,
+            permission_model=governed_permissions,
+            sync_strategy="Planned optional provider over administrator-mounted paths or a sidecar service.",
+            conflict_strategy="Will use managed import conflict_strategy handling after download.",
+            preview_strategy="Will preview from frozen managed file after import, not directly from the mount.",
+            audit_events=("files.connector.imported", "files.connector.synced", "files.connector.accessed"),
+            notes="Kept optional because NFS availability is deployment and host-kernel dependent.",
+        ),
+        ConnectorProviderDescriptor(
+            provider="local",
+            label="Local filesystem",
+            protocol="file",
+            implemented=False,
+            browse_supported=False,
+            import_supported=False,
+            optional_dependency=None,
+            permission_model="Local connector access should be restricted to administrator-declared roots plus GovOPlaN profile and policy checks.",
+            sync_strategy="Planned optional provider; managed storage local backend already exists separately.",
+            conflict_strategy=freeze_model,
+            preview_strategy="Will preview from frozen managed file after import or sync.",
+            audit_events=("files.connector.imported", "files.connector.synced", "files.connector.accessed"),
+            notes="Separate from the existing managed-file local storage backend.",
+        ),
+    )

src/govoplan_files/backend/storage/connector_spaces.py

@@ -0,0 +1,264 @@
+from __future__ import annotations
+
+from collections.abc import Mapping
+from typing import Any
+
+from sqlalchemy import false, or_
+from sqlalchemy.orm import Session
+
+from govoplan_files.backend.db.models import FileConnectorSpace
+from govoplan_files.backend.storage.access import ensure_owner_access, user_group_ids
+from govoplan_files.backend.storage.common import FileStorageError, utcnow
+from govoplan_files.backend.storage.connector_browse import normalize_connector_browse_path
+from govoplan_files.backend.storage.connector_profiles import ConnectorProfile
+
+
+SYNC_MODES = {"manual"}
+WRITABLE_PROVIDERS = {"s3"}
+
+
+def connector_space_owner_id(space: FileConnectorSpace) -> str:
+    return space.owner_user_id if space.owner_type == "user" else space.owner_group_id  # type: ignore[return-value]
+
+
+def create_connector_space(
+    session: Session,
+    *,
+    tenant_id: str,
+    owner_type: str,
+    owner_id: str,
+    user_id: str,
+    label: str,
+    profile: ConnectorProfile,
+    library_id: str | None = None,
+    remote_path: str | None = None,
+    sync_mode: str = "manual",
+    read_only: bool = True,
+    metadata: Mapping[str, Any] | None = None,
+    is_admin: bool = False,
+) -> FileConnectorSpace:
+    owner_type = owner_type.lower().strip()
+    ensure_owner_access(session, tenant_id=tenant_id, owner_type=owner_type, owner_id=owner_id, user_id=user_id, is_admin=is_admin)
+    label = _normalize_label(label)
+    sync_mode = _normalize_sync_mode(sync_mode)
+    validate_connector_space_write_mode(profile, read_only=read_only)
+    remote_path = normalize_connector_browse_path(remote_path)
+    library_id = _clean_optional(library_id)
+
+    existing = _owned_query(session, tenant_id=tenant_id, owner_type=owner_type, owner_id=owner_id).filter(
+        FileConnectorSpace.label == label,
+        FileConnectorSpace.deleted_at.is_(None),
+    ).first()
+    if existing is not None:
+        raise FileStorageError(f"Connector space already exists: {label}")
+
+    space = FileConnectorSpace(
+        tenant_id=tenant_id,
+        owner_type=owner_type,
+        owner_user_id=owner_id if owner_type == "user" else None,
+        owner_group_id=owner_id if owner_type == "group" else None,
+        label=label,
+        connector_profile_id=profile.id,
+        provider=profile.provider,
+        library_id=library_id,
+        remote_path=remote_path,
+        sync_mode=sync_mode,
+        read_only=read_only,
+        is_active=True,
+        created_by_user_id=user_id,
+        metadata_=dict(metadata or {}),
+    )
+    session.add(space)
+    session.flush()
+    return space
+
+
+def list_connector_spaces_for_user(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str,
+    owner_type: str | None = None,
+    owner_id: str | None = None,
+    include_inactive: bool = False,
+    is_admin: bool = False,
+) -> list[FileConnectorSpace]:
+    query = session.query(FileConnectorSpace).filter(
+        FileConnectorSpace.tenant_id == tenant_id,
+        FileConnectorSpace.deleted_at.is_(None),
+    )
+    if not include_inactive:
+        query = query.filter(FileConnectorSpace.is_active.is_(True))
+
+    if owner_type:
+        if not owner_id:
+            raise FileStorageError("owner_id is required when owner_type is set")
+        owner_type = owner_type.lower().strip()
+        ensure_owner_access(session, tenant_id=tenant_id, owner_type=owner_type, owner_id=owner_id, user_id=user_id, is_admin=is_admin)
+        query = _owner_filter(query, owner_type, owner_id)
+    elif not is_admin:
+        group_ids = user_group_ids(session, tenant_id=tenant_id, user_id=user_id)
+        query = query.filter(
+            or_(
+                FileConnectorSpace.owner_user_id == user_id,
+                FileConnectorSpace.owner_group_id.in_(group_ids) if group_ids else false(),
+            )
+        )
+
+    return query.order_by(FileConnectorSpace.owner_type.asc(), FileConnectorSpace.label.asc()).all()
+
+
+def get_connector_space_for_user(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str,
+    space_id: str,
+    include_inactive: bool = False,
+    is_admin: bool = False,
+) -> FileConnectorSpace:
+    query = session.query(FileConnectorSpace).filter(
+        FileConnectorSpace.id == space_id,
+        FileConnectorSpace.tenant_id == tenant_id,
+        FileConnectorSpace.deleted_at.is_(None),
+    )
+    if not include_inactive:
+        query = query.filter(FileConnectorSpace.is_active.is_(True))
+    space = query.one_or_none()
+    if space is None:
+        raise FileStorageError("Connector space not found")
+    ensure_owner_access(
+        session,
+        tenant_id=tenant_id,
+        owner_type=space.owner_type,
+        owner_id=connector_space_owner_id(space),
+        user_id=user_id,
+        is_admin=is_admin,
+    )
+    return space
+
+
+def update_connector_space(
+    session: Session,
+    space: FileConnectorSpace,
+    *,
+    user_id: str,
+    label: str | None = None,
+    library_id: str | None = None,
+    remote_path: str | None = None,
+    sync_mode: str | None = None,
+    read_only: bool | None = None,
+    is_active: bool | None = None,
+    metadata: Mapping[str, Any] | None = None,
+    is_admin: bool = False,
+) -> FileConnectorSpace:
+    ensure_owner_access(
+        session,
+        tenant_id=space.tenant_id,
+        owner_type=space.owner_type,
+        owner_id=connector_space_owner_id(space),
+        user_id=user_id,
+        is_admin=is_admin,
+    )
+    if label is not None:
+        new_label = _normalize_label(label)
+        existing = _owned_query(
+            session,
+            tenant_id=space.tenant_id,
+            owner_type=space.owner_type,
+            owner_id=connector_space_owner_id(space),
+        ).filter(
+            FileConnectorSpace.id != space.id,
+            FileConnectorSpace.label == new_label,
+            FileConnectorSpace.deleted_at.is_(None),
+        ).first()
+        if existing is not None:
+            raise FileStorageError(f"Connector space already exists: {new_label}")
+        space.label = new_label
+    if library_id is not None:
+        space.library_id = _clean_optional(library_id)
+    if remote_path is not None:
+        space.remote_path = normalize_connector_browse_path(remote_path)
+    if sync_mode is not None:
+        space.sync_mode = _normalize_sync_mode(sync_mode)
+    if read_only is not None:
+        space.read_only = bool(read_only)
+    if is_active is not None:
+        space.is_active = bool(is_active)
+    if metadata is not None:
+        space.metadata_ = dict(metadata)
+    session.add(space)
+    session.flush()
+    return space
+
+
+def validate_connector_space_write_mode(
+    profile: ConnectorProfile, *, read_only: bool
+) -> None:
+    if read_only:
+        return
+    if profile.provider not in WRITABLE_PROVIDERS or "write" not in profile.capabilities:
+        raise FileStorageError(
+            "Two-way mode requires an S3 connection with the write capability enabled"
+        )
+
+
+def soft_delete_connector_space(
+    session: Session,
+    space: FileConnectorSpace,
+    *,
+    user_id: str,
+    is_admin: bool = False,
+) -> FileConnectorSpace:
+    ensure_owner_access(
+        session,
+        tenant_id=space.tenant_id,
+        owner_type=space.owner_type,
+        owner_id=connector_space_owner_id(space),
+        user_id=user_id,
+        is_admin=is_admin,
+    )
+    space.deleted_at = utcnow()
+    space.is_active = False
+    session.add(space)
+    session.flush()
+    return space
+
+
+def _owned_query(session: Session, *, tenant_id: str, owner_type: str, owner_id: str):
+    query = session.query(FileConnectorSpace).filter(
+        FileConnectorSpace.tenant_id == tenant_id,
+        FileConnectorSpace.owner_type == owner_type,
+    )
+    return _owner_filter(query, owner_type, owner_id)
+
+
+def _owner_filter(query, owner_type: str, owner_id: str):
+    if owner_type == "user":
+        return query.filter(FileConnectorSpace.owner_user_id == owner_id)
+    if owner_type == "group":
+        return query.filter(FileConnectorSpace.owner_group_id == owner_id)
+    raise FileStorageError("Files must be owned by a user or group")
+
+
+def _normalize_label(value: str) -> str:
+    label = value.strip()
+    if not label:
+        raise FileStorageError("Connector space label is required")
+    if len(label) > 255:
+        raise FileStorageError("Connector space label is too long")
+    return label
+
+
+def _normalize_sync_mode(value: str) -> str:
+    mode = value.strip().casefold()
+    if mode not in SYNC_MODES:
+        raise FileStorageError(f"Unsupported connector space sync mode: {value}")
+    return mode
+
+
+def _clean_optional(value: object) -> str | None:
+    if value is None:
+        return None
+    text = str(value).strip()
+    return text or None

src/govoplan_files/backend/storage/connector_visibility.py

@@ -0,0 +1,213 @@
+from __future__ import annotations
+
+from collections.abc import Callable, Iterable
+from dataclasses import replace
+
+from sqlalchemy.orm import Session
+
+from govoplan_files.backend.storage.connector_deployment import (
+    connector_effective_endpoint_url,
+)
+from govoplan_files.backend.storage.connector_profile_store import (
+    select_database_connector_profiles,
+)
+from govoplan_files.backend.storage.connector_profiles import (
+    ConnectorProfile,
+    connector_profiles_from_settings,
+)
+from govoplan_files.backend.storage.connector_policy import (
+    ConnectorAccessRequest,
+    connector_policy_decision,
+)
+from govoplan_files.backend.storage.connector_policy_store import (
+    effective_connector_policy_sources,
+)
+from govoplan_files.backend.storage.connector_providers import (
+    connector_provider_descriptors,
+)
+
+
+CampaignVisibility = Callable[[str], bool]
+
+
+def visible_connector_profiles_for_actor(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str,
+    group_ids: Iterable[str],
+    settings: object | None,
+    provider: str | None = None,
+    campaign_id: str | None = None,
+    campaign_visible: CampaignVisibility | None = None,
+    include_disabled: bool = False,
+    include_admin_scopes: bool = False,
+    include_effective_policy: bool = True,
+) -> list[ConnectorProfile]:
+    """Return the same actor-filtered connector set used by API and docs surfaces."""
+
+    provider_norm = provider.strip().casefold() if provider else None
+    actor_group_ids = {str(group_id) for group_id in group_ids if str(group_id)}
+    database_profiles, database_profile_ids = select_database_connector_profiles(
+        session,
+        tenant_id=tenant_id,
+        include_disabled=include_disabled,
+        row_visible=lambda row: (
+            include_admin_scopes
+            and row.scope_type in {"user", "group", "campaign"}
+        ) or _scope_visible_to_actor(
+            scope_type=row.scope_type,
+            scope_id=row.scope_id,
+            tenant_id=tenant_id,
+            user_id=user_id,
+            group_ids=actor_group_ids,
+            campaign_id=campaign_id,
+            campaign_visible=campaign_visible,
+        ),
+    )
+    configured_profiles = connector_profiles_from_settings(settings)
+    profiles_by_id: dict[str, ConnectorProfile] = {}
+    for profile in database_profiles:
+        if profile.id not in profiles_by_id:
+            profiles_by_id[profile.id] = profile
+    for profile in configured_profiles:
+        if profile.id not in database_profile_ids and profile.id not in profiles_by_id:
+            profiles_by_id[profile.id] = profile
+
+    visible: list[ConnectorProfile] = []
+    for profile in profiles_by_id.values():
+        if not (profile.enabled or include_disabled):
+            continue
+        if provider_norm is not None and profile.provider != provider_norm:
+            continue
+        admin_scope_visible = include_admin_scopes and profile.scope_type in {
+            "user",
+            "group",
+            "campaign",
+        }
+        if not admin_scope_visible and not _profile_visible_to_actor(
+            profile,
+            tenant_id=tenant_id,
+            user_id=user_id,
+            group_ids=actor_group_ids,
+            campaign_id=campaign_id,
+            campaign_visible=campaign_visible,
+        ):
+            continue
+        visible.append(
+            _with_effective_connector_policy(
+                session, tenant_id=tenant_id, profile=profile
+            )
+            if include_effective_policy
+            else profile
+        )
+    return visible
+
+
+def connector_profile_usable_for_import(profile: ConnectorProfile) -> bool:
+    """Whether a visible profile can safely offer the current live browse/import task."""
+
+    effective_endpoint_url = connector_effective_endpoint_url(
+        provider=profile.provider,
+        endpoint_url=profile.endpoint_url,
+        metadata=profile.metadata,
+    )
+    if (
+        not profile.enabled
+        or not effective_endpoint_url
+        or not profile.credentials_configured
+        or bool(profile.secret_ref)
+    ):
+        return False
+    descriptor = next(
+        (
+            item
+            for item in connector_provider_descriptors()
+            if item.provider == profile.provider
+        ),
+        None,
+    )
+    if descriptor is None:
+        return False
+    if not (
+        descriptor.implemented
+        and descriptor.installed
+        and descriptor.browse_supported
+        and descriptor.import_supported
+    ):
+        return False
+    # Prove that the initial root browse performed by the current Files UI is
+    # policy-allowed. A later selected remote path/item is checked again.
+    return connector_policy_decision(
+        ConnectorAccessRequest(
+            connector_id=profile.id,
+            credential_id=profile.credential_profile_id,
+            provider=profile.provider,
+            external_path="",
+            external_url=effective_endpoint_url,
+            operation="import",
+        ),
+        profile.policy_sources,
+    ).allowed
+
+
+def _profile_visible_to_actor(
+    profile: ConnectorProfile,
+    *,
+    tenant_id: str,
+    user_id: str,
+    group_ids: set[str],
+    campaign_id: str | None,
+    campaign_visible: CampaignVisibility | None,
+) -> bool:
+    return _scope_visible_to_actor(
+        scope_type=profile.scope_type,
+        scope_id=profile.scope_id,
+        tenant_id=tenant_id,
+        user_id=user_id,
+        group_ids=group_ids,
+        campaign_id=campaign_id,
+        campaign_visible=campaign_visible,
+    )
+
+
+def _scope_visible_to_actor(
+    *,
+    scope_type: str,
+    scope_id: str | None,
+    tenant_id: str,
+    user_id: str,
+    group_ids: set[str],
+    campaign_id: str | None,
+    campaign_visible: CampaignVisibility | None,
+) -> bool:
+    if scope_type == "system":
+        return True
+    if scope_type == "tenant":
+        return scope_id == tenant_id
+    if scope_type == "user":
+        return scope_id == user_id
+    if scope_type == "group":
+        return bool(scope_id and scope_id in group_ids)
+    if scope_type != "campaign" or not scope_id:
+        return False
+    if campaign_id and scope_id != campaign_id:
+        return False
+    return bool(campaign_visible and campaign_visible(scope_id))
+
+
+def _with_effective_connector_policy(
+    session: Session,
+    *,
+    tenant_id: str,
+    profile: ConnectorProfile,
+) -> ConnectorProfile:
+    sources = effective_connector_policy_sources(
+        session,
+        tenant_id=tenant_id,
+        scope_type=profile.scope_type,
+        scope_id=profile.scope_id,
+    )
+    if not sources:
+        return profile
+    return replace(profile, policy_sources=tuple([*sources, *profile.policy_sources]))

src/govoplan_files/backend/storage/connector_writes.py

@@ -0,0 +1,438 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+import hashlib
+from typing import Any, Mapping
+
+from govoplan_core.core.recovery import (
+    RecoveryGuaranteeError,
+    RecoveryMode,
+    RecoveryPlan,
+    RecoveryStatus,
+)
+from govoplan_core.core.recovery_runtime import (
+    RecoveryOperationBusy,
+    RecoveryOperationStateConflict,
+    begin_durable_recovery_operation,
+)
+from govoplan_core.core.runtime_coordination import process_runtime_identity
+from govoplan_core.db.session import get_database
+from govoplan_files.backend.storage.common import FileStorageError
+from govoplan_files.backend.storage.connector_browse import (
+    ConnectorBrowseError,
+    ConnectorBrowseUnsupported,
+    _clean,
+    _s3_bucket,
+    _s3_client,
+    _s3_object_key,
+    normalize_connector_browse_path,
+)
+from govoplan_files.backend.storage.connector_profiles import ConnectorProfile
+
+
+@dataclass(frozen=True, slots=True)
+class ConnectorWriteResult:
+    recovery_operation_id: str
+    status: str
+    replayed: bool
+    provider: str
+    remote_path: str
+    revision: str | None
+    checksum_sha256: str
+    size_bytes: int
+
+
+@dataclass(frozen=True, slots=True)
+class _HeadProbe:
+    observed: Mapping[str, Any] | None
+    verified: bool
+    exception_type: str | None = None
+
+
+def write_connector_file(
+    profile: ConnectorProfile,
+    *,
+    tenant_id: str,
+    library_id: str | None,
+    remote_path: str,
+    data: bytes,
+    content_type: str | None,
+    expected_revision: str | None,
+    idempotency_key: str,
+) -> ConnectorWriteResult:
+    if profile.provider != "s3" or "write" not in profile.capabilities:
+        raise FileStorageError(
+            "Remote writes require an S3 connection with the write capability enabled"
+        )
+    try:
+        normalized_path = normalize_connector_browse_path(remote_path)
+    except ConnectorBrowseError as exc:
+        raise FileStorageError(str(exc)) from exc
+    if not normalized_path:
+        raise FileStorageError("Remote write requires an object path")
+    try:
+        bucket = _s3_bucket(profile, library_id)
+        key = _s3_object_key(profile, normalized_path)
+    except ConnectorBrowseError as exc:
+        raise FileStorageError(str(exc)) from exc
+    if not bucket or not key:
+        raise FileStorageError("S3 remote write requires a bucket and object path")
+    checksum = hashlib.sha256(data).hexdigest()
+    target_digest = hashlib.sha256(f"{bucket}:{key}".encode("utf-8")).hexdigest()
+    request = {
+        "tenant_id": tenant_id,
+        "connector_profile_id": profile.id,
+        "provider": profile.provider,
+        "remote_target_sha256": target_digest,
+        "content_sha256": checksum,
+        "size_bytes": len(data),
+        "expected_revision": expected_revision,
+    }
+    try:
+        started = begin_durable_recovery_operation(
+            get_database().SessionLocal,
+            identity=process_runtime_identity(),
+            module_id="files",
+            operation_type="connector-s3-write",
+            idempotency_key=f"files-connector-write:{idempotency_key}",
+            request=request,
+            recovery_plan=RecoveryPlan(
+                mode=RecoveryMode.FORWARD_RECOVERY,
+                preconditions=(
+                    "the connector space is explicitly configured for two-way writes",
+                    "the connection and inherited policy allow the exact remote path",
+                    "a conditional create or expected remote revision prevents blind overwrite",
+                ),
+                forward_recovery_steps=(
+                    "inspect provider metadata for the request and content digests",
+                    "resolve success only for an exact digest match or retry after verified absence",
+                ),
+                verification_steps=(
+                    "read S3 object metadata after the write",
+                    "match the recorded request and content digests without downloading content",
+                ),
+            ),
+            precondition_evidence={
+                "remote_target_sha256": target_digest,
+                "content_sha256": checksum,
+                "size_bytes": len(data),
+                "conditional_write": True,
+            },
+            lease_resource_key=f"files:connector:{tenant_id}:{profile.id}:{target_digest[:40]}",
+            lease_ttl_seconds=15 * 60,
+            resource_type="file_connector_object",
+            resource_id=target_digest,
+            metadata={
+                "resources": ["postgresql", "s3-connector"],
+                "provider": "s3",
+                "connector_profile_id": profile.id,
+            },
+            block_unresolved_resource=True,
+        )
+    except (RecoveryOperationBusy, RecoveryOperationStateConflict) as exc:
+        raise FileStorageError(
+            "This remote object is owned by another write or unresolved recovery operation"
+        ) from exc
+    except (RecoveryGuaranteeError, RuntimeError, ValueError) as exc:
+        raise FileStorageError(
+            "The Files recovery ledger is unavailable; the remote object was not changed"
+        ) from exc
+    if started.replayed or started.operation is None:
+        return ConnectorWriteResult(
+            recovery_operation_id=started.operation_id,
+            status=started.status,
+            replayed=True,
+            provider="s3",
+            remote_path=normalized_path,
+            revision=None,
+            checksum_sha256=checksum,
+            size_bytes=len(data),
+        )
+    operation = started.operation
+    try:
+        client = _s3_client(profile)
+    except (ConnectorBrowseError, ConnectorBrowseUnsupported) as exc:
+        operation.reject(
+            summary="The S3 client was unavailable before the remote effect",
+            evidence=_verified(
+                {"external_effect_started": False}, exception_type=type(exc).__name__
+            ),
+        )
+        raise FileStorageError(str(exc)) from exc
+    try:
+        try:
+            before = _head_object(client, bucket=bucket, key=key)
+        except Exception as exc:
+            operation.reject(
+                summary="Remote preconditions could not be inspected before the effect",
+                evidence=_verified(
+                    {"external_effect_started": False},
+                    exception_type=type(exc).__name__,
+                ),
+            )
+            raise FileStorageError("S3 remote revision lookup failed") from exc
+        expected = _normalize_revision(expected_revision)
+        if before is not None and expected is None:
+            operation.reject(
+                summary="A blind remote overwrite was rejected",
+                evidence=_verified(
+                    {"remote_object_exists": True, "expected_revision_supplied": False}
+                ),
+            )
+            raise FileStorageError(
+                "The remote object already exists; reload it and supply its expected revision"
+            )
+        if expected is not None and (
+            before is None or expected not in _observed_revisions(before)
+        ):
+            operation.reject(
+                summary="The expected remote revision did not match",
+                evidence=_verified(
+                    {
+                        "remote_object_exists": before is not None,
+                        "expected_revision_matches": False,
+                    }
+                ),
+            )
+            raise FileStorageError("The remote object changed; reload before writing")
+        params: dict[str, object] = {
+            "Bucket": bucket,
+            "Key": key,
+            "Body": data,
+            "Metadata": {
+                "govoplan-sha256": checksum,
+                "govoplan-request-id": started.operation_id,
+            },
+        }
+        if content_type:
+            params["ContentType"] = content_type
+        if before is None:
+            params["IfNoneMatch"] = "*"
+        else:
+            params["IfMatch"] = str(before.get("ETag") or expected_revision or "")
+        try:
+            client.put_object(**params)
+        except Exception as exc:
+            probe = _probe_head_object(client, bucket=bucket, key=key)
+            if probe.verified and _matches_effect(
+                probe.observed,
+                checksum=checksum,
+                operation_id=started.operation_id,
+            ):
+                operation.succeed(
+                    evidence=_success_evidence(
+                        probe.observed,
+                        checksum=checksum,
+                        operation_id=started.operation_id,
+                    )
+                )
+                return _result(
+                    started.operation_id,
+                    normalized_path,
+                    checksum,
+                    len(data),
+                    probe.observed,
+                )
+            operation.unresolved(
+                status=RecoveryStatus.OUTCOME_UNKNOWN,
+                summary="The S3 write outcome requires reconciliation",
+                evidence={
+                    "remote_target_sha256": target_digest,
+                    "observed": _public_observation(probe),
+                    "exception_type": type(exc).__name__,
+                },
+                failure_summary="Inspect the remote object metadata before retrying this path",
+            )
+            return ConnectorWriteResult(
+                recovery_operation_id=started.operation_id,
+                status=RecoveryStatus.OUTCOME_UNKNOWN.value,
+                replayed=False,
+                provider="s3",
+                remote_path=normalized_path,
+                revision=_revision(probe.observed),
+                checksum_sha256=checksum,
+                size_bytes=len(data),
+            )
+        probe = _probe_head_object(client, bucket=bucket, key=key)
+        if not probe.verified:
+            operation.unresolved(
+                status=RecoveryStatus.OUTCOME_UNKNOWN,
+                summary="The S3 write returned but provider evidence could not be queried",
+                evidence={
+                    "remote_target_sha256": target_digest,
+                    "observed": _public_observation(probe),
+                },
+                failure_summary="Inspect the remote object metadata before retrying this path",
+            )
+            return ConnectorWriteResult(
+                recovery_operation_id=started.operation_id,
+                status=RecoveryStatus.OUTCOME_UNKNOWN.value,
+                replayed=False,
+                provider="s3",
+                remote_path=normalized_path,
+                revision=None,
+                checksum_sha256=checksum,
+                size_bytes=len(data),
+            )
+        observed = probe.observed
+        if not _matches_effect(
+            observed, checksum=checksum, operation_id=started.operation_id
+        ):
+            operation.unresolved(
+                status=RecoveryStatus.RECOVERY_REQUIRED,
+                summary="The S3 write returned but exact provider evidence did not match",
+                evidence={
+                    "remote_target_sha256": target_digest,
+                    "observed": _public_observation(probe),
+                },
+                failure_summary="Reconcile the remote object before another write",
+            )
+            return ConnectorWriteResult(
+                recovery_operation_id=started.operation_id,
+                status=RecoveryStatus.RECOVERY_REQUIRED.value,
+                replayed=False,
+                provider="s3",
+                remote_path=normalized_path,
+                revision=_revision(observed),
+                checksum_sha256=checksum,
+                size_bytes=len(data),
+            )
+        operation.succeed(
+            evidence=_success_evidence(
+                observed, checksum=checksum, operation_id=started.operation_id
+            )
+        )
+        return _result(
+            started.operation_id,
+            normalized_path,
+            checksum,
+            len(data),
+            observed,
+        )
+    finally:
+        close = getattr(client, "close", None)
+        if callable(close):
+            close()
+
+
+def _head_object(client: Any, *, bucket: str, key: str) -> Mapping[str, Any] | None:
+    try:
+        response = client.head_object(Bucket=bucket, Key=key)
+    except Exception as exc:
+        if _is_not_found(exc):
+            return None
+        raise
+    if not isinstance(response, Mapping):
+        raise FileStorageError("S3 connector returned invalid object metadata")
+    return response
+
+
+def _probe_head_object(client: Any, *, bucket: str, key: str) -> _HeadProbe:
+    try:
+        return _HeadProbe(
+            observed=_head_object(client, bucket=bucket, key=key), verified=True
+        )
+    except Exception as exc:
+        return _HeadProbe(
+            observed=None,
+            verified=False,
+            exception_type=type(exc).__name__,
+        )
+
+
+def _is_not_found(exc: Exception) -> bool:
+    response = getattr(exc, "response", None)
+    if not isinstance(response, Mapping):
+        return False
+    error = response.get("Error")
+    code = error.get("Code") if isinstance(error, Mapping) else None
+    status = response.get("ResponseMetadata")
+    http_status = status.get("HTTPStatusCode") if isinstance(status, Mapping) else None
+    return str(code).casefold() in {"404", "nosuchkey", "notfound"} or http_status == 404
+
+
+def _metadata(observed: Mapping[str, Any] | None) -> Mapping[str, Any]:
+    value = observed.get("Metadata") if observed else None
+    return value if isinstance(value, Mapping) else {}
+
+
+def _matches_effect(
+    observed: Mapping[str, Any] | None, *, checksum: str, operation_id: str
+) -> bool:
+    metadata = _metadata(observed)
+    return bool(
+        observed is not None
+        and _clean(metadata.get("govoplan-sha256")) == checksum
+        and _clean(metadata.get("govoplan-request-id")) == operation_id
+    )
+
+
+def _revision(observed: Mapping[str, Any] | None) -> str | None:
+    if observed is None:
+        return None
+    return _clean(observed.get("VersionId") or observed.get("ETag"))
+
+
+def _normalize_revision(value: str | None) -> str | None:
+    cleaned = _clean(value)
+    return cleaned.strip('"') if cleaned else None
+
+
+def _observed_revisions(observed: Mapping[str, Any]) -> set[str]:
+    return {
+        normalized
+        for value in (observed.get("VersionId"), observed.get("ETag"))
+        if (normalized := _normalize_revision(_clean(value))) is not None
+    }
+
+
+def _success_evidence(
+    observed: Mapping[str, Any] | None, *, checksum: str, operation_id: str
+) -> dict[str, object]:
+    return _verified(
+        {
+            "remote_object_present": observed is not None,
+            "content_digest_matches": _clean(_metadata(observed).get("govoplan-sha256")) == checksum,
+            "request_marker_matches": _clean(_metadata(observed).get("govoplan-request-id")) == operation_id,
+        },
+        revision=_revision(observed),
+        content_sha256=checksum,
+    )
+
+
+def _public_observation(probe: _HeadProbe) -> dict[str, object]:
+    observed = probe.observed
+    return {
+        "probe_verified": probe.verified,
+        "probe_exception_type": probe.exception_type,
+        "present": observed is not None,
+        "revision": _revision(observed),
+        "has_content_digest": bool(_clean(_metadata(observed).get("govoplan-sha256"))),
+        "has_request_marker": bool(_clean(_metadata(observed).get("govoplan-request-id"))),
+    }
+
+
+def _verified(checks: dict[str, object], **details: object) -> dict[str, object]:
+    return {"verified": True, "checks": checks, **details}
+
+
+def _result(
+    operation_id: str,
+    remote_path: str,
+    checksum: str,
+    size_bytes: int,
+    observed: Mapping[str, Any] | None,
+) -> ConnectorWriteResult:
+    return ConnectorWriteResult(
+        recovery_operation_id=operation_id,
+        status=RecoveryStatus.SUCCEEDED.value,
+        replayed=False,
+        provider="s3",
+        remote_path=remote_path,
+        revision=_revision(observed),
+        checksum_sha256=checksum,
+        size_bytes=size_bytes,
+    )
+
+
+__all__ = ["ConnectorWriteResult", "write_connector_file"]

src/govoplan_files/backend/storage/content_protection.py

@@ -0,0 +1,93 @@
+from __future__ import annotations
+
+from govoplan_core.core.encryption import (
+    ContentProtectionRequest,
+    ContentUnprotectionRequest,
+    ProtectedContent,
+    encryption_content_cipher,
+)
+from govoplan_files.backend.runtime import get_registry
+from govoplan_files.backend.storage.common import FileStorageError
+
+
+FILES_PROTECTION_PROFILE = "files-server-envelope-v1"
+
+
+def protect_blob_content(
+    session: object,
+    *,
+    tenant_id: str,
+    blob_id: str,
+    vault_id: str,
+    ciphertext_ref: str,
+    plaintext: bytes,
+    actor_id: str,
+    content_type: str | None,
+) -> ProtectedContent:
+    capability = encryption_content_cipher(get_registry())
+    if capability is None:
+        raise FileStorageError(
+            "File encryption was requested, but the Encryption module is unavailable."
+        )
+    try:
+        return capability.protect_content(
+            session,
+            request=ContentProtectionRequest(
+                tenant_id=tenant_id,
+                owner_module="files",
+                resource_type="file_blob",
+                resource_id=blob_id,
+                profile_id=FILES_PROTECTION_PROFILE,
+                vault_id=vault_id,
+                ciphertext_ref=ciphertext_ref,
+                plaintext=plaintext,
+                policy_decision_ref="files:explicit-vault-selection:v1",
+                idempotency_key=f"file-blob:{blob_id}:content:v1",
+                actor_id=actor_id,
+                metadata={
+                    "content_type": content_type or "application/octet-stream",
+                },
+            ),
+        )
+    except Exception as exc:
+        raise FileStorageError(
+            "Managed file content could not be protected by the configured vault."
+        ) from exc
+
+
+def unprotect_blob_content(
+    session: object,
+    *,
+    tenant_id: str,
+    blob_id: str,
+    envelope_id: str,
+    ciphertext: bytes,
+) -> bytes:
+    capability = encryption_content_cipher(get_registry())
+    if capability is None:
+        raise FileStorageError(
+            "This file is encrypted and cannot be read while Encryption is unavailable."
+        )
+    try:
+        return capability.unprotect_content(
+            session,
+            request=ContentUnprotectionRequest(
+                tenant_id=tenant_id,
+                owner_module="files",
+                resource_type="file_blob",
+                resource_id=blob_id,
+                envelope_id=envelope_id,
+                ciphertext=ciphertext,
+            ),
+        )
+    except Exception as exc:
+        raise FileStorageError(
+            "Managed file content could not be opened with its protection envelope."
+        ) from exc
+
+
+__all__ = [
+    "FILES_PROTECTION_PROFILE",
+    "protect_blob_content",
+    "unprotect_blob_content",
+]

src/govoplan_files/backend/storage/files.py

@@ -2,30 +2,47 @@ from __future__ import annotations
 
 import hashlib
 import mimetypes
+from datetime import datetime
 from pathlib import PurePosixPath
 from typing import Any, Iterable
 from uuid import uuid4
 
-from sqlalchemy import or_
+from sqlalchemy import and_, exists, func, or_
 from sqlalchemy.orm import Session
 
-from govoplan_core.db.models import Group, Tenant, User
-from govoplan_core.core.optional import reraise_unless_missing_package
+from govoplan_core.core.campaigns import CAPABILITY_CAMPAIGNS_ACCESS, CampaignAccessProvider
 from govoplan_files.backend.db.models import CampaignAttachmentUse, FileAsset, FileBlob, FileShare, FileVersion
-from govoplan_files.backend.runtime import settings
-from govoplan_files.backend.storage.access import ensure_owner_access, user_group_ids
-from govoplan_files.backend.storage.backends import StorageBackendError, get_storage_backend
+from govoplan_files.backend.runtime import get_registry, settings
+from govoplan_files.backend.storage.access import ensure_owner_access, ensure_share_target_exists, user_group_ids
+from govoplan_files.backend.storage.backends import (
+    StorageBackendError,
+    StorageObjectMissing,
+    get_storage_backend,
+)
 from govoplan_files.backend.storage.common import FileConflictResolution, FileStorageError, UploadedStoredFile, utcnow
-from govoplan_files.backend.storage.paths import filename_from_path, join_folder_filename, normalize_folder, normalize_logical_path, safe_storage_component
+from govoplan_files.backend.storage.paths import filename_from_path, join_folder_filename, normalize_folder, normalize_logical_path
+from govoplan_files.backend.storage.provenance import source_provenance_from_metadata
+from govoplan_files.backend.storage.recovery import begin_blob_write_recovery
+from govoplan_files.backend.storage.integrity import (
+    QUARANTINED_BLOB_STATUSES,
+    read_verified_blob_bytes,
+)
+from govoplan_files.backend.storage.share_state import effective_file_share_clause
 
 
-def _campaign_model():
-    try:
-        from govoplan_campaign.backend.db.models import Campaign
-    except ModuleNotFoundError as exc:
-        reraise_unless_missing_package(exc, "govoplan_campaign")
-        raise FileStorageError("Campaign module is not installed") from exc
-    return Campaign
+def _campaign_access_provider() -> CampaignAccessProvider:
+    registry = get_registry()
+    if registry is None or not hasattr(registry, "has_capability") or not registry.has_capability(CAPABILITY_CAMPAIGNS_ACCESS):
+        raise FileStorageError("Campaign module is not installed")
+    capability = registry.require_capability(CAPABILITY_CAMPAIGNS_ACCESS)
+    if not isinstance(capability, CampaignAccessProvider):
+        raise FileStorageError("Campaign access capability is invalid")
+    return capability
+
+
+def _ensure_campaign_exists(session: Session, *, tenant_id: str, campaign_id: str) -> None:
+    if not _campaign_access_provider().campaign_exists(session, tenant_id=tenant_id, campaign_id=campaign_id):
+        raise FileStorageError("Campaign not found")
 
 
 def _asset_query_for_owner(session: Session, *, tenant_id: str, owner_type: str, owner_id: str):
@@ -45,8 +62,9 @@ def _storage_backend_name() -> str:
     return settings.file_storage_backend.lower().strip()
 
 
-def _storage_key(*, tenant_id: str, checksum: str, filename: str) -> str:
-    return f"tenants/{tenant_id}/files/{checksum[:2]}/{uuid4().hex}-{safe_storage_component(filename)}"
+def _storage_key(*, tenant_id: str, checksum: str) -> str:
+    # Object locators remain opaque so recovery evidence never persists names.
+    return f"tenants/{tenant_id}/files/{checksum[:2]}/{uuid4().hex}.blob"
 
 
 def _get_or_create_blob(
@@ -56,40 +74,144 @@ def _get_or_create_blob(
     data: bytes,
     filename: str,
     content_type: str | None,
+    actor_id: str,
+    encryption_vault_id: str | None = None,
 ) -> FileBlob:
     checksum = hashlib.sha256(data).hexdigest()
     size = len(data)
+    vault_id = str(encryption_vault_id or "").strip() or None
+    protection_discriminator = f"vault:{vault_id}" if vault_id else "plaintext"
     blob = (
         session.query(FileBlob)
-        .filter(FileBlob.tenant_id == tenant_id, FileBlob.checksum_sha256 == checksum, FileBlob.size_bytes == size)
+        .filter(FileBlob.tenant_id == tenant_id, FileBlob.checksum_sha256 == checksum, FileBlob.size_bytes == size, FileBlob.protection_discriminator == protection_discriminator)
+        .with_for_update()
         .one_or_none()
     )
     if blob:
         backend = get_storage_backend()
-        if not backend.exists(blob.storage_key):
+        repair_required = (
+            blob.integrity_status in QUARANTINED_BLOB_STATUSES
+            or blob.quarantined_at is not None
+        )
+        try:
+            backend.stat(blob.storage_key)
+        except StorageObjectMissing:
+            repair_required = True
+        except StorageBackendError as exc:
+            raise FileStorageError(str(exc)) from exc
+        if repair_required:
+            repair_token = hashlib.sha256(
+                repr(
+                    (
+                        blob.integrity_status,
+                        blob.integrity_checked_at,
+                        blob.quarantined_at,
+                        blob.storage_checksum_sha256,
+                    )
+                ).encode("utf-8")
+            ).hexdigest()
+            recovery = begin_blob_write_recovery(
+                session,
+                backend=backend,
+                tenant_id=tenant_id,
+                blob_id=blob.id,
+                storage_key=blob.storage_key,
+                semantic_checksum_sha256=checksum,
+                semantic_size_bytes=size,
+                protection_discriminator=protection_discriminator,
+                created_new=False,
+                repair_token=repair_token,
+            )
+            stored_data = data
+            expected_envelope_id = blob.encryption_envelope_id
+            if vault_id:
+                from govoplan_files.backend.storage.content_protection import protect_blob_content
+
+                protected = protect_blob_content(
+                    session,
+                    tenant_id=tenant_id,
+                    blob_id=blob.id,
+                    vault_id=vault_id,
+                    ciphertext_ref=blob.storage_key,
+                    plaintext=data,
+                    actor_id=actor_id,
+                    content_type=content_type,
+                )
+                if blob.encryption_envelope_id not in {None, protected.envelope.envelope_id}:
+                    raise FileStorageError("The existing encrypted blob has another protection envelope.")
+                stored_data = protected.ciphertext
+                blob.encryption_envelope_id = protected.envelope.envelope_id
+                expected_envelope_id = protected.envelope.envelope_id
+                blob.storage_checksum_sha256 = hashlib.sha256(stored_data).hexdigest()
+                blob.storage_size_bytes = len(stored_data)
+            recovery.prepare_stored_bytes(
+                stored_data,
+                envelope_id=expected_envelope_id,
+            )
             try:
-                backend.put_bytes(blob.storage_key, data, content_type=content_type)
+                backend.put_bytes(blob.storage_key, stored_data, content_type="application/octet-stream" if vault_id else content_type)
             except StorageBackendError as exc:
                 raise FileStorageError(str(exc)) from exc
+            blob.integrity_status = "verified"
+            blob.integrity_checked_at = utcnow()
+            blob.integrity_failure = None
+            blob.quarantined_at = None
         blob.ref_count += 1
         session.add(blob)
         return blob
 
-    storage_key = _storage_key(tenant_id=tenant_id, checksum=checksum, filename=filename)
+    blob_id = str(uuid4())
+    storage_key = _storage_key(tenant_id=tenant_id, checksum=checksum)
     backend = get_storage_backend()
+    recovery = begin_blob_write_recovery(
+        session,
+        backend=backend,
+        tenant_id=tenant_id,
+        blob_id=blob_id,
+        storage_key=storage_key,
+        semantic_checksum_sha256=checksum,
+        semantic_size_bytes=size,
+        protection_discriminator=protection_discriminator,
+        created_new=True,
+    )
+    stored_data = data
+    envelope_id = None
+    if vault_id:
+        from govoplan_files.backend.storage.content_protection import protect_blob_content
+
+        protected = protect_blob_content(
+            session,
+            tenant_id=tenant_id,
+            blob_id=blob_id,
+            vault_id=vault_id,
+            ciphertext_ref=storage_key,
+            plaintext=data,
+            actor_id=actor_id,
+            content_type=content_type,
+        )
+        stored_data = protected.ciphertext
+        envelope_id = protected.envelope.envelope_id
+    recovery.prepare_stored_bytes(stored_data, envelope_id=envelope_id)
     try:
-        backend.put_bytes(storage_key, data, content_type=content_type)
+        backend.put_bytes(storage_key, stored_data, content_type="application/octet-stream" if vault_id else content_type)
     except StorageBackendError as exc:
         raise FileStorageError(str(exc)) from exc
     blob = FileBlob(
+        id=blob_id,
         tenant_id=tenant_id,
         storage_backend=_storage_backend_name(),
         storage_bucket=_storage_bucket_name(),
         storage_key=storage_key,
         checksum_sha256=checksum,
         size_bytes=size,
+        protection_discriminator=protection_discriminator,
+        encryption_envelope_id=envelope_id,
+        storage_checksum_sha256=hashlib.sha256(stored_data).hexdigest() if vault_id else None,
+        storage_size_bytes=len(stored_data) if vault_id else None,
         content_type=content_type,
         ref_count=1,
+        integrity_status="verified",
+        integrity_checked_at=utcnow(),
     )
     session.add(blob)
     session.flush()
@@ -114,6 +236,7 @@ def create_file_asset(
     conflict_strategy: str = "reject",
     conflict_resolutions: Iterable[FileConflictResolution] | None = None,
     is_admin: bool = False,
+    encryption_vault_id: str | None = None,
 ) -> UploadedStoredFile:
     owner_type = owner_type.lower().strip()
     ensure_owner_access(session, tenant_id=tenant_id, owner_type=owner_type, owner_id=owner_id, user_id=user_id, is_admin=is_admin)
@@ -141,7 +264,7 @@ def create_file_asset(
     elif action == "rename":
         logical_path = _next_available_logical_path(session, tenant_id=tenant_id, owner_type=owner_type, owner_id=owner_id, desired_path=logical_path)
 
-    blob = _get_or_create_blob(session, tenant_id=tenant_id, data=data, filename=safe_filename, content_type=content_type)
+    blob = _get_or_create_blob(session, tenant_id=tenant_id, data=data, filename=safe_filename, content_type=content_type, actor_id=user_id, encryption_vault_id=encryption_vault_id)
     asset = FileAsset(
         tenant_id=tenant_id,
         owner_type=owner_type,
@@ -176,6 +299,150 @@ def create_file_asset(
     return UploadedStoredFile(asset=asset, version=version, blob=blob)
 
 
+def sync_file_asset_from_source(
+    session: Session,
+    *,
+    tenant_id: str,
+    owner_type: str,
+    owner_id: str,
+    user_id: str,
+    filename: str,
+    data: bytes,
+    metadata: dict[str, Any],
+    folder: str | None = None,
+    display_path: str | None = None,
+    content_type: str | None = None,
+    campaign_id: str | None = None,
+    conflict_strategy: str = "rename",
+    is_admin: bool = False,
+) -> tuple[UploadedStoredFile, str, str | None]:
+    owner_type = owner_type.lower().strip()
+    ensure_owner_access(session, tenant_id=tenant_id, owner_type=owner_type, owner_id=owner_id, user_id=user_id, is_admin=is_admin)
+    provenance = source_provenance_from_metadata(metadata)
+    if not provenance:
+        raise FileStorageError("Connector sync requires source provenance")
+    existing = find_asset_by_source(
+        session,
+        tenant_id=tenant_id,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        source_provenance=provenance,
+    )
+    if existing is None:
+        stored = create_file_asset(
+            session,
+            tenant_id=tenant_id,
+            owner_type=owner_type,
+            owner_id=owner_id,
+            user_id=user_id,
+            filename=filename,
+            data=data,
+            folder=folder,
+            display_path=display_path,
+            content_type=content_type,
+            metadata=metadata,
+            campaign_id=campaign_id,
+            conflict_strategy=conflict_strategy,
+            is_admin=is_admin,
+        )
+        return stored, "created", None
+
+    previous_version_id = existing.current_version_id
+    stored, action = update_file_asset_content(
+        session,
+        existing,
+        tenant_id=tenant_id,
+        user_id=user_id,
+        filename=filename,
+        data=data,
+        content_type=content_type,
+        metadata=metadata,
+    )
+    if campaign_id:
+        share_file(session, tenant_id=tenant_id, asset=existing, target_type="campaign", target_id=campaign_id, permission="read", user_id=user_id)
+    return stored, action, previous_version_id
+
+
+def find_asset_by_source(
+    session: Session,
+    *,
+    tenant_id: str,
+    owner_type: str,
+    owner_id: str,
+    source_provenance: dict[str, Any],
+) -> FileAsset | None:
+    wanted = _source_identity(source_provenance)
+    if wanted is None:
+        return None
+    assets = (
+        _asset_query_for_owner(session, tenant_id=tenant_id, owner_type=owner_type, owner_id=owner_id)
+        .filter(FileAsset.deleted_at.is_(None))
+        .order_by(FileAsset.updated_at.desc())
+        .all()
+    )
+    for asset in assets:
+        if _source_identity(source_provenance_from_metadata(asset.metadata_ or {})) == wanted:
+            return asset
+    return None
+
+
+def update_file_asset_content(
+    session: Session,
+    asset: FileAsset,
+    *,
+    tenant_id: str,
+    user_id: str,
+    filename: str,
+    data: bytes,
+    content_type: str | None,
+    metadata: dict[str, Any],
+    encryption_vault_id: str | None = None,
+) -> tuple[UploadedStoredFile, str]:
+    if asset.tenant_id != tenant_id or asset.deleted_at is not None:
+        raise FileStorageError("File not found")
+    safe_filename = filename_from_path(normalize_logical_path(filename, fallback_filename="file"))
+    if not content_type:
+        content_type = mimetypes.guess_type(safe_filename)[0] or "application/octet-stream"
+    current_version, current_blob = current_version_and_blob(session, asset)
+    checksum = hashlib.sha256(data).hexdigest()
+    asset.metadata_ = metadata
+    session.add(asset)
+    inherited_vault_id = encryption_vault_id
+    if inherited_vault_id is None and current_blob.encryption_envelope_id:
+        prefix = "vault:"
+        if current_blob.protection_discriminator.startswith(prefix):
+            inherited_vault_id = current_blob.protection_discriminator[len(prefix) :]
+    inherited_vault_id = str(inherited_vault_id or "").strip() or None
+    target_protection = (
+        f"vault:{inherited_vault_id}" if inherited_vault_id else "plaintext"
+    )
+    if (
+        current_blob.checksum_sha256 == checksum
+        and current_blob.size_bytes == len(data)
+        and current_blob.protection_discriminator == target_protection
+    ):
+        return UploadedStoredFile(asset=asset, version=current_version, blob=current_blob), "unchanged"
+
+    blob = _get_or_create_blob(session, tenant_id=tenant_id, data=data, filename=safe_filename, content_type=content_type, actor_id=user_id, encryption_vault_id=inherited_vault_id)
+    version = FileVersion(
+        tenant_id=tenant_id,
+        file_asset_id=asset.id,
+        blob_id=blob.id,
+        version_number=_next_version_number(session, asset.id),
+        filename_at_upload=safe_filename,
+        display_path_at_upload=asset.display_path,
+        content_type=content_type,
+        size_bytes=blob.size_bytes,
+        checksum_sha256=blob.checksum_sha256,
+        created_by_user_id=user_id,
+    )
+    session.add(version)
+    session.flush()
+    asset.current_version_id = version.id
+    session.add(asset)
+    return UploadedStoredFile(asset=asset, version=version, blob=blob), "updated"
+
+
 def get_asset_for_user(session: Session, *, tenant_id: str, user_id: str, asset_id: str, require_write: bool = False, is_admin: bool = False) -> FileAsset:
     asset = session.get(FileAsset, asset_id)
     if not asset or asset.tenant_id != tenant_id or asset.deleted_at is not None:
@@ -192,7 +459,7 @@ def get_asset_for_user(session: Session, *, tenant_id: str, user_id: str, asset_
         .filter(
             FileShare.tenant_id == tenant_id,
             FileShare.file_asset_id == asset.id,
-            FileShare.revoked_at.is_(None),
+            effective_file_share_clause(),
             FileShare.permission.in_(permission_values),
             or_(
                 (FileShare.target_type == "user") & (FileShare.target_id == user_id),
@@ -207,6 +474,32 @@ def get_asset_for_user(session: Session, *, tenant_id: str, user_id: str, asset_
     return asset
 
 
+def get_asset_for_share_management(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str,
+    asset_id: str,
+    is_admin: bool = False,
+) -> FileAsset:
+    asset = session.get(FileAsset, asset_id)
+    if not asset or asset.tenant_id != tenant_id or asset.deleted_at is not None:
+        raise FileStorageError("File not found")
+    if is_admin:
+        return asset
+    owns_asset = (
+        asset.owner_type == "user"
+        and asset.owner_user_id == user_id
+    ) or (
+        asset.owner_type == "group"
+        and asset.owner_group_id
+        in user_group_ids(session, tenant_id=tenant_id, user_id=user_id)
+    )
+    if not owns_asset:
+        raise FileStorageError("Only file owners and administrators can manage shares")
+    return asset
+
+
 def list_assets_for_user(
     session: Session,
     *,
@@ -216,9 +509,119 @@ def list_assets_for_user(
     owner_id: str | None = None,
     campaign_id: str | None = None,
     path_prefix: str | None = None,
+    campaign_usage: str | None = None,
+    audit_relevant: bool | None = None,
     include_deleted: bool = False,
     is_admin: bool = False,
 ) -> list[FileAsset]:
+    query = _asset_visibility_query_for_user(
+        session,
+        tenant_id=tenant_id,
+        user_id=user_id,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        campaign_id=campaign_id,
+        path_prefix=path_prefix,
+        campaign_usage=campaign_usage,
+        audit_relevant=audit_relevant,
+        include_deleted=include_deleted,
+        is_admin=is_admin,
+    )
+    return query.order_by(FileAsset.display_path.asc(), FileAsset.updated_at.desc(), FileAsset.id.asc()).all()
+
+
+def list_recent_assets_for_user(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str,
+    limit: int,
+    owner_type: str | None = None,
+    owner_id: str | None = None,
+    campaign_id: str | None = None,
+    path_prefix: str | None = None,
+    campaign_usage: str | None = None,
+    audit_relevant: bool | None = None,
+    is_admin: bool = False,
+) -> list[FileAsset]:
+    """Return a bounded recent projection through the normal access query."""
+
+    query = _asset_visibility_query_for_user(
+        session,
+        tenant_id=tenant_id,
+        user_id=user_id,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        campaign_id=campaign_id,
+        path_prefix=path_prefix,
+        campaign_usage=campaign_usage,
+        audit_relevant=audit_relevant,
+        is_admin=is_admin,
+    )
+    return (
+        query.order_by(FileAsset.updated_at.desc(), FileAsset.id.asc())
+        .limit(max(1, limit))
+        .all()
+    )
+
+
+def list_assets_for_user_window(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str,
+    owner_type: str | None = None,
+    owner_id: str | None = None,
+    campaign_id: str | None = None,
+    path_prefix: str | None = None,
+    campaign_usage: str | None = None,
+    audit_relevant: bool | None = None,
+    include_deleted: bool = False,
+    is_admin: bool = False,
+    page_size: int,
+    after_display_path: str | None = None,
+    after_updated_at=None,
+    after_id: str | None = None,
+) -> tuple[list[FileAsset], bool]:
+    query = _asset_visibility_query_for_user(
+        session,
+        tenant_id=tenant_id,
+        user_id=user_id,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        campaign_id=campaign_id,
+        path_prefix=path_prefix,
+        campaign_usage=campaign_usage,
+        audit_relevant=audit_relevant,
+        include_deleted=include_deleted,
+        is_admin=is_admin,
+    )
+    if after_display_path is not None and after_updated_at is not None and after_id:
+        query = query.filter(
+            or_(
+                FileAsset.display_path > after_display_path,
+                and_(FileAsset.display_path == after_display_path, FileAsset.updated_at < after_updated_at),
+                and_(FileAsset.display_path == after_display_path, FileAsset.updated_at == after_updated_at, FileAsset.id > after_id),
+            )
+        )
+    rows = query.order_by(FileAsset.display_path.asc(), FileAsset.updated_at.desc(), FileAsset.id.asc()).limit(page_size + 1).all()
+    return rows[:page_size], len(rows) > page_size
+
+
+def _asset_visibility_query_for_user(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str,
+    owner_type: str | None = None,
+    owner_id: str | None = None,
+    campaign_id: str | None = None,
+    path_prefix: str | None = None,
+    campaign_usage: str | None = None,
+    audit_relevant: bool | None = None,
+    include_deleted: bool = False,
+    is_admin: bool = False,
+):
     query = session.query(FileAsset).filter(FileAsset.tenant_id == tenant_id)
     if not include_deleted:
         query = query.filter(FileAsset.deleted_at.is_(None))
@@ -229,28 +632,95 @@ def list_assets_for_user(
         if owner_type == "group" and owner_id:
             query = query.filter(FileAsset.owner_group_id == owner_id)
     if campaign_id:
-        query = query.join(FileShare, FileShare.file_asset_id == FileAsset.id).filter(
+        campaign_share = exists().where(
             FileShare.tenant_id == tenant_id,
+            FileShare.file_asset_id == FileAsset.id,
             FileShare.target_type == "campaign",
             FileShare.target_id == campaign_id,
-            FileShare.revoked_at.is_(None),
+            effective_file_share_clause(),
         )
+        query = query.filter(campaign_share)
     elif not is_admin and not owner_type:
         group_ids = user_group_ids(session, tenant_id=tenant_id, user_id=user_id)
-        query = query.outerjoin(FileShare, FileShare.file_asset_id == FileAsset.id).filter(
+        active_share = exists().where(
+            FileShare.tenant_id == tenant_id,
+            FileShare.file_asset_id == FileAsset.id,
+            effective_file_share_clause(),
+            or_(
+                (FileShare.target_type == "user") & (FileShare.target_id == user_id),
+                (FileShare.target_type == "group") & (FileShare.target_id.in_(group_ids)),
+                (FileShare.target_type == "tenant") & (FileShare.target_id == tenant_id),
+            )
+        )
+        query = query.filter(
             or_(
                 (FileAsset.owner_type == "user") & (FileAsset.owner_user_id == user_id),
                 (FileAsset.owner_type == "group") & (FileAsset.owner_group_id.in_(group_ids)),
-                (FileShare.revoked_at.is_(None)) & (FileShare.target_type == "user") & (FileShare.target_id == user_id),
-                (FileShare.revoked_at.is_(None)) & (FileShare.target_type == "group") & (FileShare.target_id.in_(group_ids)),
-                (FileShare.revoked_at.is_(None)) & (FileShare.target_type == "tenant") & (FileShare.target_id == tenant_id),
+                active_share,
             )
         )
     if path_prefix:
         prefix = normalize_folder(path_prefix)
         if prefix:
             query = query.filter(FileAsset.display_path.like(f"{prefix}/%"))
-    return query.order_by(FileAsset.display_path.asc(), FileAsset.updated_at.desc()).all()
+    campaign_share_exists = exists().where(
+        FileShare.tenant_id == tenant_id,
+        FileShare.file_asset_id == FileAsset.id,
+        FileShare.target_type == "campaign",
+        effective_file_share_clause(),
+    )
+    campaign_use_exists = exists().where(
+        CampaignAttachmentUse.tenant_id == tenant_id,
+        CampaignAttachmentUse.file_asset_id == FileAsset.id,
+    )
+    if campaign_usage == "linked":
+        query = query.filter(or_(campaign_share_exists, campaign_use_exists))
+    elif campaign_usage == "unlinked":
+        query = query.filter(~or_(campaign_share_exists, campaign_use_exists))
+
+    if audit_relevant is not None:
+        sent_use_exists = exists().where(
+            CampaignAttachmentUse.tenant_id == tenant_id,
+            CampaignAttachmentUse.file_asset_id == FileAsset.id,
+            CampaignAttachmentUse.use_stage == "sent",
+        )
+        query = query.filter(sent_use_exists if audit_relevant else ~sent_use_exists)
+    return query
+
+
+def count_assets_for_user(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str,
+    owner_type: str | None = None,
+    owner_id: str | None = None,
+    campaign_id: str | None = None,
+    path_prefix: str | None = None,
+    campaign_usage: str | None = None,
+    audit_relevant: bool | None = None,
+    include_deleted: bool = False,
+    is_admin: bool = False,
+) -> int:
+    query = _asset_visibility_query_for_user(
+        session,
+        tenant_id=tenant_id,
+        user_id=user_id,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        campaign_id=campaign_id,
+        path_prefix=path_prefix,
+        campaign_usage=campaign_usage,
+        audit_relevant=audit_relevant,
+        include_deleted=include_deleted,
+        is_admin=is_admin,
+    )
+    return int(
+        query.order_by(None)
+        .with_entities(func.count(func.distinct(FileAsset.id)))
+        .scalar()
+        or 0
+    )
 
 
 def current_version_and_blob(session: Session, asset: FileAsset) -> tuple[FileVersion, FileBlob]:
@@ -265,13 +735,51 @@ def current_version_and_blob(session: Session, asset: FileAsset) -> tuple[FileVe
     return version, blob
 
 
+def current_versions_and_blobs(session: Session, assets: Iterable[FileAsset]) -> dict[str, tuple[FileVersion, FileBlob]]:
+    asset_list = list(assets)
+    if not asset_list:
+        return {}
+    version_ids = [asset.current_version_id for asset in asset_list if asset.current_version_id]
+    if len(version_ids) != len(asset_list):
+        raise FileStorageError("File has no current version")
+
+    rows: list[tuple[FileVersion, FileBlob]] = []
+    for chunk in _chunks(version_ids):
+        rows.extend(
+            session.query(FileVersion, FileBlob)
+            .join(FileBlob, FileBlob.id == FileVersion.blob_id)
+            .filter(FileVersion.id.in_(chunk))
+            .all()
+        )
+    by_version_id = {version.id: (version, blob) for version, blob in rows}
+    result: dict[str, tuple[FileVersion, FileBlob]] = {}
+    for asset in asset_list:
+        version_blob = by_version_id.get(asset.current_version_id or "")
+        if not version_blob:
+            raise FileStorageError("File version not found")
+        result[asset.id] = version_blob
+    return result
+
+
 def read_asset_bytes(session: Session, asset: FileAsset) -> tuple[bytes, FileVersion, FileBlob]:
     version, blob = current_version_and_blob(session, asset)
     backend = get_storage_backend()
-    try:
-        return backend.get_bytes(blob.storage_key), version, blob
-    except StorageBackendError as exc:
-        raise FileStorageError(str(exc)) from exc
+    return read_verified_blob_bytes(blob, backend=backend), version, blob
+
+
+def read_asset_version_bytes(
+    session: Session,
+    asset: FileAsset,
+    version_id: str,
+) -> tuple[bytes, FileVersion, FileBlob]:
+    version = session.get(FileVersion, version_id)
+    if version is None or version.file_asset_id != asset.id:
+        raise FileStorageError("File version not found")
+    blob = session.get(FileBlob, version.blob_id)
+    if blob is None or blob.tenant_id != asset.tenant_id:
+        raise FileStorageError("File blob not found")
+    backend = get_storage_backend()
+    return read_verified_blob_bytes(blob, backend=backend), version, blob
 
 
 def share_file(
@@ -283,6 +791,7 @@ def share_file(
     target_id: str,
     permission: str,
     user_id: str,
+    expires_at: datetime | None = None,
 ) -> FileShare:
     target_type = target_type.lower().strip()
     permission = permission.lower().strip()
@@ -292,23 +801,11 @@ def share_file(
         raise FileStorageError("Unsupported share target")
     if permission not in {"read", "write", "manage"}:
         raise FileStorageError("Unsupported file permission")
-    if target_type == "user":
-        target_user = session.get(User, target_id)
-        if not target_user or target_user.tenant_id != tenant_id or not target_user.is_active:
-            raise FileStorageError("User not found")
-    if target_type == "group":
-        group = session.get(Group, target_id)
-        if not group or group.tenant_id != tenant_id or not group.is_active:
-            raise FileStorageError("Group not found")
-    if target_type == "tenant":
-        tenant = session.get(Tenant, target_id)
-        if target_id != tenant_id or not tenant or not tenant.is_active:
-            raise FileStorageError("Tenant not found")
+    _validate_share_expiry(expires_at)
+    if target_type in {"user", "group", "tenant"}:
+        ensure_share_target_exists(tenant_id=tenant_id, target_type=target_type, target_id=target_id)
     if target_type == "campaign":
-        Campaign = _campaign_model()
-        campaign = session.get(Campaign, target_id)
-        if not campaign or campaign.tenant_id != tenant_id:
-            raise FileStorageError("Campaign not found")
+        _ensure_campaign_exists(session, tenant_id=tenant_id, campaign_id=target_id)
     existing = (
         session.query(FileShare)
         .filter(
@@ -322,6 +819,7 @@ def share_file(
     )
     if existing:
         existing.permission = permission
+        existing.expires_at = expires_at
         session.add(existing)
         return existing
     share = FileShare(
@@ -331,6 +829,7 @@ def share_file(
         target_id=target_id,
         permission=permission,
         created_by_user_id=user_id,
+        expires_at=expires_at,
     )
     session.add(share)
     return share
@@ -345,6 +844,7 @@ def share_files(
     target_id: str,
     permission: str,
     user_id: str,
+    expires_at: datetime | None = None,
 ) -> list[FileShare]:
     target_type = target_type.lower().strip()
     permission = permission.lower().strip()
@@ -352,23 +852,11 @@ def share_files(
         raise FileStorageError("Unsupported share target")
     if permission not in {"read", "write", "manage"}:
         raise FileStorageError("Unsupported file permission")
-    if target_type == "user":
-        target_user = session.get(User, target_id)
-        if not target_user or target_user.tenant_id != tenant_id or not target_user.is_active:
-            raise FileStorageError("User not found")
-    if target_type == "group":
-        group = session.get(Group, target_id)
-        if not group or group.tenant_id != tenant_id or not group.is_active:
-            raise FileStorageError("Group not found")
-    if target_type == "tenant":
-        tenant = session.get(Tenant, target_id)
-        if target_id != tenant_id or not tenant or not tenant.is_active:
-            raise FileStorageError("Tenant not found")
+    _validate_share_expiry(expires_at)
+    if target_type in {"user", "group", "tenant"}:
+        ensure_share_target_exists(tenant_id=tenant_id, target_type=target_type, target_id=target_id)
     if target_type == "campaign":
-        Campaign = _campaign_model()
-        campaign = session.get(Campaign, target_id)
-        if not campaign or campaign.tenant_id != tenant_id:
-            raise FileStorageError("Campaign not found")
+        _ensure_campaign_exists(session, tenant_id=tenant_id, campaign_id=target_id)
 
     asset_list = list(assets)
     if not asset_list:
@@ -392,6 +880,7 @@ def share_files(
         existing = existing_by_asset.get(asset.id)
         if existing:
             existing.permission = permission
+            existing.expires_at = expires_at
             session.add(existing)
             shares.append(existing)
             continue
@@ -402,12 +891,88 @@ def share_files(
             target_id=target_id,
             permission=permission,
             created_by_user_id=user_id,
+            expires_at=expires_at,
         )
         session.add(share)
         shares.append(share)
     return shares
 
 
+def list_file_shares(
+    session: Session,
+    *,
+    tenant_id: str,
+    asset_id: str,
+    include_inactive: bool = False,
+) -> list[FileShare]:
+    query = session.query(FileShare).filter(
+        FileShare.tenant_id == tenant_id,
+        FileShare.file_asset_id == asset_id,
+    )
+    if not include_inactive:
+        query = query.filter(effective_file_share_clause())
+    return query.order_by(FileShare.created_at.desc(), FileShare.id.desc()).all()
+
+
+def revoke_file_share(
+    session: Session,
+    *,
+    tenant_id: str,
+    asset_id: str,
+    share_id: str,
+    user_id: str,
+) -> tuple[FileShare, bool]:
+    share = (
+        session.query(FileShare)
+        .filter(
+            FileShare.id == share_id,
+            FileShare.tenant_id == tenant_id,
+            FileShare.file_asset_id == asset_id,
+        )
+        .one_or_none()
+    )
+    if share is None:
+        raise FileStorageError("File share not found")
+    if share.revoked_at is not None:
+        return share, False
+    share.revoked_at = utcnow()
+    share.revoked_by_user_id = user_id
+    session.add(share)
+    return share, True
+
+
+def current_file_share_for_target(
+    session: Session,
+    *,
+    tenant_id: str,
+    asset_id: str,
+    target_type: str,
+    target_id: str,
+) -> FileShare | None:
+    return (
+        session.query(FileShare)
+        .filter(
+            FileShare.tenant_id == tenant_id,
+            FileShare.file_asset_id == asset_id,
+            FileShare.target_type == target_type.lower().strip(),
+            FileShare.target_id == target_id,
+            FileShare.revoked_at.is_(None),
+        )
+        .order_by(FileShare.created_at.desc(), FileShare.id.desc())
+        .first()
+    )
+
+
+def _validate_share_expiry(expires_at: datetime | None) -> None:
+    if expires_at is None:
+        return
+    from govoplan_files.backend.storage.share_state import file_share_is_active
+
+    candidate = FileShare(expires_at=expires_at)
+    if not file_share_is_active(candidate):
+        raise FileStorageError("File share expiry must be in the future")
+
+
 
 def soft_delete_assets(session: Session, assets: Iterable[FileAsset]) -> int:
     count = 0
@@ -437,6 +1002,11 @@ def _asset_owner_id(asset: FileAsset) -> str:
     raise FileStorageError("File has no valid owner")
 
 
+def _chunks(values: list[str], size: int = 900):
+    for index in range(0, len(values), size):
+        yield values[index:index + size]
+
+
 def _active_asset_exists(session: Session, *, tenant_id: str, owner_type: str, owner_id: str, path: str, exclude_asset_id: str | None = None) -> bool:
     return _active_asset_at_path(
         session,
@@ -538,11 +1108,44 @@ def _resolution_by_path(conflict_resolutions: Iterable[FileConflictResolution] |
 
 def _normalize_conflict_strategy(strategy: str | None) -> str:
     normalized = (strategy or "reject").lower().strip()
-    if normalized not in {"reject", "overwrite", "rename"}:
+    if normalized not in {"reject", "overwrite", "rename", "skip"}:
         raise FileStorageError("Unsupported conflict strategy")
     return normalized
 
 
+def _next_version_number(session: Session, asset_id: str) -> int:
+    row = (
+        session.query(FileVersion.version_number)
+        .filter(FileVersion.file_asset_id == asset_id)
+        .order_by(FileVersion.version_number.desc())
+        .first()
+    )
+    return (int(row[0]) if row else 0) + 1
+
+
+def _source_identity(provenance: dict[str, Any] | None) -> tuple[object, ...] | None:
+    if not provenance:
+        return None
+    connector_id = _clean_identity(provenance.get("connector_id"))
+    provider = _clean_identity(provenance.get("provider"))
+    external_id = _clean_identity(provenance.get("external_id"))
+    if connector_id and external_id:
+        return ("external_id", connector_id, provider, external_id)
+    external_path = _clean_identity(provenance.get("external_path"))
+    metadata = provenance.get("metadata") if isinstance(provenance.get("metadata"), dict) else {}
+    library_id = _clean_identity(metadata.get("library_id") or metadata.get("profile_id") or metadata.get("share"))
+    if connector_id and external_path:
+        return ("external_path", connector_id, provider, library_id, external_path)
+    return None
+
+
+def _clean_identity(value: object) -> str | None:
+    if value is None:
+        return None
+    text = str(value).strip()
+    return text or None
+
+
 def _copy_asset_to_path(
     session: Session,
     asset: FileAsset,

src/govoplan_files/backend/storage/folders.py

@@ -68,13 +68,63 @@ def list_folders_for_user(
     include_deleted: bool = False,
     is_admin: bool = False,
 ) -> list[FileFolder]:
+    query = _folder_visibility_query_for_user(
+        session,
+        tenant_id=tenant_id,
+        user_id=user_id,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        include_deleted=include_deleted,
+        is_admin=is_admin,
+    )
+    return query.order_by(FileFolder.path.asc(), FileFolder.id.asc()).all()
+
+
+def list_folders_for_user_window(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str,
+    owner_type: str,
+    owner_id: str,
+    include_deleted: bool = False,
+    is_admin: bool = False,
+    page_size: int,
+    after_path: str | None = None,
+    after_id: str | None = None,
+) -> tuple[list[FileFolder], bool]:
+    query = _folder_visibility_query_for_user(
+        session,
+        tenant_id=tenant_id,
+        user_id=user_id,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        include_deleted=include_deleted,
+        is_admin=is_admin,
+    )
+    if after_path is not None and after_id:
+        query = query.filter(or_(FileFolder.path > after_path, (FileFolder.path == after_path) & (FileFolder.id > after_id)))
+    rows = query.order_by(FileFolder.path.asc(), FileFolder.id.asc()).limit(page_size + 1).all()
+    return rows[:page_size], len(rows) > page_size
+
+
+def _folder_visibility_query_for_user(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str,
+    owner_type: str,
+    owner_id: str,
+    include_deleted: bool = False,
+    is_admin: bool = False,
+):
     owner_type = owner_type.lower().strip()
     ensure_owner_access(session, tenant_id=tenant_id, owner_type=owner_type, owner_id=owner_id, user_id=user_id, is_admin=is_admin)
     query = session.query(FileFolder).filter(FileFolder.tenant_id == tenant_id, FileFolder.owner_type == owner_type)
     query = _owner_filter(query, owner_type, owner_id)
     if not include_deleted:
         query = query.filter(FileFolder.deleted_at.is_(None))
-    return query.order_by(FileFolder.path.asc()).all()
+    return query
 
 
 def soft_delete_folder(

src/govoplan_files/backend/storage/http_client.py

@@ -0,0 +1,247 @@
+from __future__ import annotations
+
+import socket
+import ssl
+import select
+from collections.abc import Mapping
+from contextlib import contextmanager
+from dataclasses import dataclass
+from typing import Any, Iterator
+
+import httpcore
+import httpx
+
+from govoplan_core.security.outbound_http import (
+    OutboundHttpError,
+    bounded_chunks_bytes,
+    create_outbound_connection,
+    response_limit,
+    validate_outbound_http_url,
+)
+
+
+class ConnectorHttpError(RuntimeError):
+    pass
+
+
+@dataclass(frozen=True, slots=True)
+class ConnectorHttpResponse:
+    status_code: int
+    headers: Mapping[str, str]
+    content: bytes
+
+
+_HTTPCORE_TRANSPORT_ERRORS = (
+    httpcore.TimeoutException,
+    httpcore.NetworkError,
+    httpcore.ProtocolError,
+    httpcore.ProxyError,
+    httpcore.UnsupportedProtocol,
+)
+
+
+class _SocketNetworkStream(httpcore.NetworkStream):
+    """Public httpcore NetworkStream adapter around an approved socket."""
+
+    def __init__(self, sock: socket.socket) -> None:
+        self._socket = sock
+
+    def read(self, max_bytes: int, timeout: float | None = None) -> bytes:
+        try:
+            self._socket.settimeout(timeout)
+            return self._socket.recv(max_bytes)
+        except socket.timeout as exc:
+            raise httpcore.ReadTimeout(str(exc)) from exc
+        except OSError as exc:
+            raise httpcore.ReadError(str(exc)) from exc
+
+    def write(self, buffer: bytes, timeout: float | None = None) -> None:
+        try:
+            self._socket.settimeout(timeout)
+            self._socket.sendall(buffer)
+        except socket.timeout as exc:
+            raise httpcore.WriteTimeout(str(exc)) from exc
+        except OSError as exc:
+            raise httpcore.WriteError(str(exc)) from exc
+
+    def close(self) -> None:
+        self._socket.close()
+
+    def start_tls(
+        self,
+        ssl_context: ssl.SSLContext,
+        server_hostname: str | None = None,
+        timeout: float | None = None,
+    ) -> httpcore.NetworkStream:
+        try:
+            self._socket.settimeout(timeout)
+            tls_socket = ssl_context.wrap_socket(self._socket, server_hostname=server_hostname)
+        except socket.timeout as exc:
+            self.close()
+            raise httpcore.ConnectTimeout(str(exc)) from exc
+        except OSError as exc:
+            self.close()
+            raise httpcore.ConnectError(str(exc)) from exc
+        return _SocketNetworkStream(tls_socket)
+
+    def get_extra_info(self, info: str) -> Any:
+        if info == "ssl_object" and isinstance(self._socket, ssl.SSLSocket):
+            return self._socket
+        if info == "client_addr":
+            return self._socket.getsockname()
+        if info == "server_addr":
+            return self._socket.getpeername()
+        if info == "socket":
+            return self._socket
+        if info == "is_readable":
+            try:
+                return bool(select.select([self._socket], [], [], 0)[0])
+            except (OSError, ValueError):
+                return True
+        return None
+
+
+class _OutboundPolicyNetworkBackend(httpcore.NetworkBackend):
+    def connect_tcp(
+        self,
+        host: str,
+        port: int,
+        timeout: float | None = None,
+        local_address: str | None = None,
+        socket_options: Any = None,
+    ) -> httpcore.NetworkStream:
+        source_address = None if local_address is None else (local_address, 0)
+        try:
+            sock = create_outbound_connection(
+                host,
+                port,
+                timeout=timeout,
+                source_address=source_address,
+                socket_options=socket_options,
+                label="File connector HTTP endpoint",
+            )
+        except socket.timeout as exc:
+            raise httpcore.ConnectTimeout(str(exc)) from exc
+        except (OSError, OutboundHttpError) as exc:
+            raise httpcore.ConnectError(str(exc)) from exc
+        return _SocketNetworkStream(sock)
+
+    def connect_unix_socket(self, path: str, timeout: float | None = None, socket_options: Any = None):  # type: ignore[no-untyped-def]
+        del path, timeout, socket_options
+        raise httpcore.ConnectError("Unix sockets are not supported for file connectors")
+
+
+class _HttpcoreResponseStream(httpx.SyncByteStream):
+    def __init__(self, stream: Any, *, request: httpx.Request) -> None:
+        self._stream = stream
+        self._request = request
+
+    def __iter__(self):  # type: ignore[no-untyped-def]
+        try:
+            yield from self._stream
+        except _HTTPCORE_TRANSPORT_ERRORS as exc:
+            raise httpx.TransportError(str(exc), request=self._request) from exc
+
+    def close(self) -> None:
+        if hasattr(self._stream, "close"):
+            self._stream.close()
+
+
+class _OutboundPolicyHTTPTransport(httpx.BaseTransport):
+    def __init__(self) -> None:
+        self._connection_pool = httpcore.ConnectionPool(
+            ssl_context=httpx.create_ssl_context(verify=True, trust_env=False),
+            max_connections=100,
+            max_keepalive_connections=20,
+            keepalive_expiry=5.0,
+            network_backend=_OutboundPolicyNetworkBackend(),
+        )
+
+    def handle_request(self, request: httpx.Request) -> httpx.Response:
+        core_request = httpcore.Request(
+            method=request.method,
+            url=httpcore.URL(
+                scheme=request.url.raw_scheme,
+                host=request.url.raw_host,
+                port=request.url.port,
+                target=request.url.raw_path,
+            ),
+            headers=request.headers.raw,
+            content=request.stream,
+            extensions=request.extensions,
+        )
+        try:
+            response = self._connection_pool.handle_request(core_request)
+        except _HTTPCORE_TRANSPORT_ERRORS as exc:
+            raise httpx.TransportError(str(exc), request=request) from exc
+        return httpx.Response(
+            status_code=response.status,
+            headers=response.headers,
+            stream=_HttpcoreResponseStream(response.stream, request=request),
+            extensions=response.extensions,
+        )
+
+    def close(self) -> None:
+        self._connection_pool.close()
+
+
+_CONNECTOR_HTTP_CLIENT = httpx.Client(
+    transport=_OutboundPolicyHTTPTransport(),
+    follow_redirects=False,
+    timeout=15.0,
+)
+
+
+@contextmanager
+def _stream_connector_request(method: str, url: str, **kwargs: Any) -> Iterator[httpx.Response]:
+    timeout = kwargs.pop("timeout", 15.0)
+    with _CONNECTOR_HTTP_CLIENT.stream(
+        method,
+        url,
+        timeout=timeout,
+        **kwargs,
+    ) as response:
+        yield response
+
+
+def request_connector_bytes(
+    method: str,
+    url: str,
+    *,
+    headers: Mapping[str, str] | None = None,
+    params: Mapping[str, str] | None = None,
+    data: Mapping[str, str] | bytes | str | None = None,
+    content: bytes | str | None = None,
+    auth: Any = None,
+    timeout: float = 15.0,
+    kind: str = "structured",
+    max_bytes: int | None = None,
+    label: str = "File connector",
+) -> ConnectorHttpResponse:
+    try:
+        validated_url = validate_outbound_http_url(url, label=f"{label} URL")
+        effective_limit = response_limit(kind) if max_bytes is None else min(int(max_bytes), response_limit(kind))
+        with _stream_connector_request(
+            method,
+            validated_url,
+            headers=dict(headers or {}),
+            params=params,
+            data=data,
+            content=content,
+            auth=auth,
+            timeout=timeout,
+        ) as response:
+            body = bounded_chunks_bytes(
+                response.iter_bytes(),
+                headers=response.headers,
+                max_bytes=effective_limit,
+                kind=kind,
+                label=f"{label} response",
+            )
+            return ConnectorHttpResponse(
+                status_code=response.status_code,
+                headers=dict(response.headers),
+                content=body,
+            )
+    except (httpx.HTTPError, OutboundHttpError, ValueError) as exc:
+        raise ConnectorHttpError(str(exc)) from exc

src/govoplan_files/backend/storage/integrity.py

@@ -0,0 +1,550 @@
+from __future__ import annotations
+
+import hashlib
+from dataclasses import dataclass
+
+from sqlalchemy.orm import Session, object_session
+
+from govoplan_files.backend.db.models import (
+    FileBlob,
+    FileIntegrityFinding,
+    FileIntegrityScan,
+)
+from govoplan_files.backend.storage.backends import (
+    StorageBackend,
+    StorageBackendError,
+    StorageObjectMissing,
+    get_storage_backend,
+)
+from govoplan_files.backend.storage.recovery import (
+    begin_orphan_cleanup_recovery,
+)
+from govoplan_files.backend.storage.common import FileStorageError, utcnow
+
+
+TERMINAL_SCAN_STATUSES = {"completed", "cancelled"}
+QUARANTINED_BLOB_STATUSES = {
+    "missing",
+    "size_mismatch",
+    "checksum_mismatch",
+}
+
+
+@dataclass(frozen=True, slots=True)
+class BlobInspection:
+    valid: bool
+    kind: str
+    observed_size_bytes: int | None = None
+    observed_checksum_sha256: str | None = None
+
+
+@dataclass(frozen=True, slots=True)
+class IntegrityActionResult:
+    action: str
+    changed: bool
+    dry_run: bool
+    finding: FileIntegrityFinding
+    inspection: BlobInspection | None = None
+
+
+def storage_prefix_for_tenant(tenant_id: str) -> str:
+    return f"tenants/{tenant_id}/files/"
+
+
+def create_integrity_scan(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str,
+    verify_checksums: bool = True,
+    batch_size: int = 100,
+    backend: StorageBackend | None = None,
+) -> FileIntegrityScan:
+    active_backend = backend or get_storage_backend()
+    scan = FileIntegrityScan(
+        tenant_id=tenant_id,
+        storage_backend=active_backend.name,
+        storage_prefix=storage_prefix_for_tenant(tenant_id),
+        verify_checksums=verify_checksums,
+        batch_size=max(1, min(int(batch_size), 1000)),
+        created_by_user_id=user_id,
+    )
+    session.add(scan)
+    session.flush()
+    return scan
+
+
+def run_integrity_scan_batch(
+    session: Session,
+    scan: FileIntegrityScan,
+    *,
+    backend: StorageBackend | None = None,
+) -> FileIntegrityScan:
+    if scan.status in TERMINAL_SCAN_STATUSES:
+        return scan
+    active_backend = backend or get_storage_backend()
+    if active_backend.name != scan.storage_backend:
+        raise FileStorageError(
+            "The configured storage backend changed after this integrity scan started"
+        )
+    if scan.started_at is None:
+        scan.started_at = utcnow()
+    scan.status = "running"
+    scan.last_error = None
+    if scan.phase == "blobs":
+        _scan_blob_batch(session, scan, active_backend)
+    elif scan.phase == "objects":
+        _scan_object_batch(session, scan, active_backend)
+    else:
+        scan.phase = "completed"
+        scan.status = "completed"
+        scan.completed_at = utcnow()
+    scan.revision += 1
+    session.add(scan)
+    return scan
+
+
+def mark_integrity_scan_failed(
+    scan: FileIntegrityScan,
+    *,
+    error: Exception,
+) -> None:
+    scan.status = "failed"
+    scan.last_error = type(error).__name__[:255]
+    scan.revision += 1
+
+
+def inspect_blob(
+    blob: FileBlob,
+    *,
+    backend: StorageBackend,
+    verify_checksum: bool = True,
+) -> BlobInspection:
+    expected_size = blob.storage_size_bytes if blob.storage_size_bytes is not None else blob.size_bytes
+    expected_checksum = blob.storage_checksum_sha256 if blob.storage_checksum_sha256 is not None else blob.checksum_sha256
+    try:
+        info = backend.stat(blob.storage_key)
+    except StorageObjectMissing:
+        return BlobInspection(valid=False, kind="missing")
+    if info.size_bytes != expected_size:
+        return BlobInspection(
+            valid=False,
+            kind="size_mismatch",
+            observed_size_bytes=info.size_bytes,
+        )
+    if not verify_checksum:
+        return BlobInspection(
+            valid=True,
+            kind="verified",
+            observed_size_bytes=info.size_bytes,
+        )
+    digest = hashlib.sha256()
+    observed_size = 0
+    for chunk in backend.iter_bytes(blob.storage_key):
+        observed_size += len(chunk)
+        digest.update(chunk)
+    observed_checksum = digest.hexdigest()
+    if observed_size != expected_size:
+        return BlobInspection(
+            valid=False,
+            kind="size_mismatch",
+            observed_size_bytes=observed_size,
+            observed_checksum_sha256=observed_checksum,
+        )
+    if observed_checksum != expected_checksum:
+        return BlobInspection(
+            valid=False,
+            kind="checksum_mismatch",
+            observed_size_bytes=observed_size,
+            observed_checksum_sha256=observed_checksum,
+        )
+    return BlobInspection(
+        valid=True,
+        kind="verified",
+        observed_size_bytes=observed_size,
+        observed_checksum_sha256=observed_checksum,
+    )
+
+
+def apply_blob_inspection(
+    session: Session,
+    blob: FileBlob,
+    inspection: BlobInspection,
+    *,
+    checked_at=None,
+) -> None:
+    timestamp = checked_at or utcnow()
+    blob.integrity_checked_at = timestamp
+    if inspection.valid:
+        blob.integrity_status = "verified"
+        blob.integrity_failure = None
+        blob.quarantined_at = None
+    else:
+        blob.integrity_status = inspection.kind
+        blob.integrity_failure = inspection.kind
+        blob.quarantined_at = blob.quarantined_at or timestamp
+    session.add(blob)
+
+
+def ensure_blob_is_readable(blob: FileBlob) -> None:
+    if blob.integrity_status in QUARANTINED_BLOB_STATUSES or blob.quarantined_at:
+        raise FileStorageError(
+            "Managed file content is quarantined because integrity verification failed"
+        )
+
+
+def read_verified_blob_bytes(
+    blob: FileBlob,
+    *,
+    backend: StorageBackend,
+) -> bytes:
+    ensure_blob_is_readable(blob)
+    try:
+        data = backend.get_bytes(blob.storage_key)
+    except StorageBackendError as exc:
+        raise FileStorageError("Managed file content is not available") from exc
+    expected_storage_size = blob.storage_size_bytes if blob.storage_size_bytes is not None else blob.size_bytes
+    expected_storage_checksum = blob.storage_checksum_sha256 if blob.storage_checksum_sha256 is not None else blob.checksum_sha256
+    if len(data) != expected_storage_size:
+        raise FileStorageError(
+            "Managed file content failed its recorded size verification"
+        )
+    if hashlib.sha256(data).hexdigest() != expected_storage_checksum:
+        raise FileStorageError(
+            "Managed file content failed its recorded checksum verification"
+        )
+    if blob.encryption_envelope_id:
+        session = object_session(blob)
+        if session is None:
+            raise FileStorageError("Encrypted managed content requires an attached database session")
+        from govoplan_files.backend.storage.content_protection import unprotect_blob_content
+
+        data = unprotect_blob_content(
+            session,
+            tenant_id=blob.tenant_id,
+            blob_id=blob.id,
+            envelope_id=blob.encryption_envelope_id,
+            ciphertext=data,
+        )
+        if len(data) != blob.size_bytes:
+            raise FileStorageError("Decrypted managed file content failed its recorded size verification")
+        if hashlib.sha256(data).hexdigest() != blob.checksum_sha256:
+            raise FileStorageError("Decrypted managed file content failed its recorded checksum verification")
+    return data
+
+
+def recheck_integrity_finding(
+    session: Session,
+    finding: FileIntegrityFinding,
+    *,
+    user_id: str,
+    dry_run: bool,
+    backend: StorageBackend | None = None,
+) -> IntegrityActionResult:
+    if finding.kind == "orphan_object" or not finding.blob_id:
+        raise FileStorageError("Only blob integrity findings can be rechecked")
+    blob = session.get(FileBlob, finding.blob_id)
+    if blob is None or blob.tenant_id != finding.tenant_id:
+        raise FileStorageError("Integrity finding blob no longer exists")
+    active_backend = backend or get_storage_backend()
+    scan = session.get(FileIntegrityScan, finding.scan_id)
+    if scan is None or scan.storage_backend != active_backend.name:
+        raise FileStorageError(
+            "The configured storage backend does not match the integrity finding"
+        )
+    inspection = inspect_blob(
+        blob,
+        backend=active_backend,
+        verify_checksum=True,
+    )
+    changed = False
+    if not dry_run:
+        previous = (
+            blob.integrity_status,
+            blob.quarantined_at,
+            finding.state,
+        )
+        apply_blob_inspection(session, blob, inspection)
+        _update_finding_from_inspection(finding, inspection)
+        if inspection.valid:
+            finding.state = "resolved"
+            finding.resolved_at = utcnow()
+            finding.resolved_by_user_id = user_id
+        session.add(finding)
+        finding.revision += 1
+        changed = previous != (
+            blob.integrity_status,
+            blob.quarantined_at,
+            finding.state,
+        )
+    return IntegrityActionResult(
+        action="recheck",
+        changed=changed,
+        dry_run=dry_run,
+        finding=finding,
+        inspection=inspection,
+    )
+
+
+def cleanup_orphan_finding(
+    session: Session,
+    finding: FileIntegrityFinding,
+    *,
+    user_id: str,
+    dry_run: bool,
+    backend: StorageBackend | None = None,
+) -> IntegrityActionResult:
+    if finding.kind != "orphan_object":
+        raise FileStorageError("Only orphan-object findings can be cleaned up")
+    scan = session.get(FileIntegrityScan, finding.scan_id)
+    if scan is None or scan.tenant_id != finding.tenant_id:
+        raise FileStorageError("Integrity scan not found")
+    if not finding.storage_key.startswith(scan.storage_prefix):
+        raise FileStorageError("Orphan cleanup is outside the scan storage scope")
+    referenced = (
+        session.query(FileBlob.id)
+        .filter(
+            FileBlob.tenant_id == finding.tenant_id,
+            FileBlob.storage_backend == scan.storage_backend,
+            FileBlob.storage_key == finding.storage_key,
+        )
+        .first()
+    )
+    if referenced:
+        if not dry_run and finding.state != "resolved":
+            finding.state = "resolved"
+            finding.resolved_at = utcnow()
+            finding.resolved_by_user_id = user_id
+            finding.revision += 1
+            session.add(finding)
+            return IntegrityActionResult(
+                action="retained_referenced",
+                changed=True,
+                dry_run=False,
+                finding=finding,
+            )
+        return IntegrityActionResult(
+            action="retained_referenced",
+            changed=False,
+            dry_run=dry_run,
+            finding=finding,
+        )
+    if finding.state == "deleted":
+        return IntegrityActionResult(
+            action="already_deleted",
+            changed=False,
+            dry_run=dry_run,
+            finding=finding,
+        )
+    if dry_run:
+        return IntegrityActionResult(
+            action="would_delete",
+            changed=False,
+            dry_run=True,
+            finding=finding,
+        )
+    active_backend = backend or get_storage_backend()
+    if active_backend.name != scan.storage_backend:
+        raise FileStorageError(
+            "The configured storage backend does not match the integrity finding"
+        )
+    begin_orphan_cleanup_recovery(
+        session,
+        finding,
+        backend=active_backend,
+        user_id=user_id,
+    )
+    try:
+        active_backend.stat(finding.storage_key)
+    except StorageObjectMissing:
+        action = "already_absent"
+    else:
+        active_backend.delete(finding.storage_key)
+        action = "deleted"
+    finding.state = "deleted"
+    finding.resolved_at = utcnow()
+    finding.resolved_by_user_id = user_id
+    finding.revision += 1
+    session.add(finding)
+    return IntegrityActionResult(
+        action=action,
+        changed=True,
+        dry_run=False,
+        finding=finding,
+    )
+
+
+def _scan_blob_batch(
+    session: Session,
+    scan: FileIntegrityScan,
+    backend: StorageBackend,
+) -> None:
+    query = session.query(FileBlob).filter(
+        FileBlob.tenant_id == scan.tenant_id,
+        FileBlob.storage_backend == scan.storage_backend,
+    )
+    if scan.blob_cursor:
+        query = query.filter(FileBlob.id > scan.blob_cursor)
+    blobs = query.order_by(FileBlob.id.asc()).limit(scan.batch_size).all()
+    for blob in blobs:
+        inspection = inspect_blob(
+            blob,
+            backend=backend,
+            verify_checksum=scan.verify_checksums,
+        )
+        apply_blob_inspection(session, blob, inspection)
+        scan.scanned_blob_count += 1
+        if inspection.valid:
+            scan.verified_blob_count += 1
+            _resolve_scan_blob_findings(session, scan, blob)
+        else:
+            scan.quarantined_blob_count += 1
+            _record_blob_finding(session, scan, blob, inspection)
+        scan.blob_cursor = blob.id
+    if len(blobs) < scan.batch_size:
+        scan.phase = "objects"
+        scan.object_cursor = None
+
+
+def _scan_object_batch(
+    session: Session,
+    scan: FileIntegrityScan,
+    backend: StorageBackend,
+) -> None:
+    page = backend.list_objects(
+        prefix=scan.storage_prefix,
+        after=scan.object_cursor,
+        limit=scan.batch_size,
+    )
+    keys = [item.key for item in page.objects]
+    referenced_keys = {
+        row[0]
+        for row in session.query(FileBlob.storage_key)
+        .filter(
+            FileBlob.tenant_id == scan.tenant_id,
+            FileBlob.storage_backend == scan.storage_backend,
+            FileBlob.storage_key.in_(keys),
+        )
+        .all()
+    } if keys else set()
+    for item in page.objects:
+        scan.scanned_object_count += 1
+        if item.key in referenced_keys:
+            continue
+        scan.orphan_object_count += 1
+        _record_orphan_finding(
+            session,
+            scan,
+            storage_key=item.key,
+            size_bytes=item.size_bytes,
+        )
+    scan.object_cursor = page.next_cursor
+    if page.next_cursor is None:
+        scan.phase = "completed"
+        scan.status = "completed"
+        scan.completed_at = utcnow()
+
+
+def _record_blob_finding(
+    session: Session,
+    scan: FileIntegrityScan,
+    blob: FileBlob,
+    inspection: BlobInspection,
+) -> FileIntegrityFinding:
+    finding = (
+        session.query(FileIntegrityFinding)
+        .filter(
+            FileIntegrityFinding.scan_id == scan.id,
+            FileIntegrityFinding.blob_id == blob.id,
+            FileIntegrityFinding.kind == inspection.kind,
+        )
+        .one_or_none()
+    )
+    if finding is None:
+        finding = FileIntegrityFinding(
+            scan_id=scan.id,
+            tenant_id=scan.tenant_id,
+            kind=inspection.kind,
+            blob_id=blob.id,
+            storage_key=blob.storage_key,
+            expected_size_bytes=blob.storage_size_bytes if blob.storage_size_bytes is not None else blob.size_bytes,
+            expected_checksum_sha256=blob.storage_checksum_sha256 if blob.storage_checksum_sha256 is not None else blob.checksum_sha256,
+        )
+    else:
+        finding.revision += 1
+    _update_finding_from_inspection(finding, inspection)
+    session.add(finding)
+    return finding
+
+
+def _record_orphan_finding(
+    session: Session,
+    scan: FileIntegrityScan,
+    *,
+    storage_key: str,
+    size_bytes: int,
+) -> FileIntegrityFinding:
+    finding = (
+        session.query(FileIntegrityFinding)
+        .filter(
+            FileIntegrityFinding.scan_id == scan.id,
+            FileIntegrityFinding.kind == "orphan_object",
+            FileIntegrityFinding.storage_key == storage_key,
+        )
+        .one_or_none()
+    )
+    if finding is None:
+        finding = FileIntegrityFinding(
+            scan_id=scan.id,
+            tenant_id=scan.tenant_id,
+            kind="orphan_object",
+            storage_key=storage_key,
+            observed_size_bytes=size_bytes,
+        )
+        session.add(finding)
+    return finding
+
+
+def _resolve_scan_blob_findings(
+    session: Session,
+    scan: FileIntegrityScan,
+    blob: FileBlob,
+) -> None:
+    for finding in (
+        session.query(FileIntegrityFinding)
+        .filter(
+            FileIntegrityFinding.scan_id == scan.id,
+            FileIntegrityFinding.blob_id == blob.id,
+            FileIntegrityFinding.state == "open",
+        )
+        .all()
+    ):
+        finding.state = "resolved"
+        finding.resolved_at = utcnow()
+        finding.revision += 1
+        session.add(finding)
+
+
+def _update_finding_from_inspection(
+    finding: FileIntegrityFinding,
+    inspection: BlobInspection,
+) -> None:
+    finding.observed_size_bytes = inspection.observed_size_bytes
+    finding.observed_checksum_sha256 = inspection.observed_checksum_sha256
+
+
+__all__ = [
+    "BlobInspection",
+    "IntegrityActionResult",
+    "QUARANTINED_BLOB_STATUSES",
+    "apply_blob_inspection",
+    "cleanup_orphan_finding",
+    "create_integrity_scan",
+    "ensure_blob_is_readable",
+    "inspect_blob",
+    "mark_integrity_scan_failed",
+    "read_verified_blob_bytes",
+    "recheck_integrity_finding",
+    "run_integrity_scan_batch",
+    "storage_prefix_for_tenant",
+]

src/govoplan_files/backend/storage/lifecycle.py

@@ -0,0 +1,796 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from datetime import UTC, datetime
+import hashlib
+import json
+from typing import Callable, Iterable
+
+from sqlalchemy import func, inspect, or_
+from sqlalchemy.orm import Session
+
+from govoplan_core.core.recovery import (
+    RecoveryGuaranteeError,
+    RecoveryMode,
+    RecoveryPlan,
+    RecoveryStatus,
+)
+from govoplan_core.core.recovery_runtime import (
+    RecoveryOperationBusy,
+    RecoveryOperationStateConflict,
+    begin_durable_recovery_operation,
+)
+from govoplan_core.core.runtime_coordination import process_runtime_identity
+from govoplan_core.db.session import get_database
+from govoplan_files.backend.db.models import (
+    CampaignAttachmentUse,
+    FileAsset,
+    FileBlob,
+    FileConnectorSpace,
+    FileFolder,
+    FileFormEvidenceGrant,
+    FileShare,
+    FileVersion,
+)
+from govoplan_files.backend.storage.access import ensure_owner_access
+from govoplan_files.backend.storage.backends import (
+    StorageBackendError,
+    get_storage_backend,
+)
+from govoplan_files.backend.storage.common import FileStorageError, utcnow
+from govoplan_files.backend.storage.connector_spaces import connector_space_owner_id
+from govoplan_files.backend.storage.paths import normalize_folder
+from govoplan_files.backend.storage.share_state import effective_file_share_clause
+
+
+@dataclass(frozen=True, slots=True)
+class PurgePreviewItem:
+    file_id: str
+    filename: str
+    lifecycle_revision: int
+    deleted_at: datetime | None
+    retained_until: datetime | None
+    legal_hold: bool
+    blockers: tuple[str, ...]
+    blob_ids: tuple[str, ...]
+
+    def digest_payload(self) -> dict[str, object]:
+        return {
+            "file_id": self.file_id,
+            "filename": self.filename,
+            "lifecycle_revision": self.lifecycle_revision,
+            "deleted_at": _iso(self.deleted_at),
+            "retained_until": _iso(self.retained_until),
+            "legal_hold": self.legal_hold,
+            "blockers": list(self.blockers),
+            "blob_ids": list(self.blob_ids),
+        }
+
+
+@dataclass(frozen=True, slots=True)
+class PurgePreview:
+    preview_sha256: str
+    items: tuple[PurgePreviewItem, ...]
+
+    @property
+    def eligible(self) -> bool:
+        return all(not item.blockers for item in self.items)
+
+
+@dataclass(frozen=True, slots=True)
+class PurgeResult:
+    recovery_operation_id: str
+    status: str
+    replayed: bool
+    purged_files: int
+    released_blobs: int
+
+
+@dataclass(frozen=True, slots=True)
+class BlobGcResult:
+    inspected_blobs: int
+    deleted_blobs: int
+    unresolved_operation_ids: tuple[str, ...]
+
+
+def set_asset_lifecycle(
+    session: Session,
+    asset: FileAsset,
+    *,
+    retained_until: datetime | None,
+    legal_hold: bool,
+    reason: str,
+    expected_revision: int,
+) -> FileAsset:
+    if asset.lifecycle_revision != expected_revision:
+        raise FileStorageError("File lifecycle settings changed; reload before saving")
+    asset.retained_until = retained_until
+    asset.legal_hold = bool(legal_hold)
+    asset.lifecycle_reason = reason.strip()
+    asset.lifecycle_revision += 1
+    session.add(asset)
+    session.flush()
+    return asset
+
+
+def get_asset_for_lifecycle(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str,
+    asset_id: str,
+    is_admin: bool,
+) -> FileAsset:
+    asset = session.get(FileAsset, asset_id)
+    if asset is None or asset.tenant_id != tenant_id:
+        raise FileStorageError("File not found")
+    ensure_owner_access(
+        session,
+        tenant_id=tenant_id,
+        owner_type=asset.owner_type,
+        owner_id=_asset_owner_id(asset),
+        user_id=user_id,
+        is_admin=is_admin,
+    )
+    return asset
+
+
+def restore_asset(session: Session, asset: FileAsset) -> bool:
+    if asset.deleted_at is None:
+        return False
+    collision = _asset_owner_query(session, asset).filter(
+        FileAsset.id != asset.id,
+        FileAsset.display_path == asset.display_path,
+        FileAsset.deleted_at.is_(None),
+    ).first()
+    if collision is not None:
+        raise FileStorageError(
+            "The file cannot be restored because its path is already in use"
+        )
+    asset.deleted_at = None
+    asset.lifecycle_revision += 1
+    session.add(asset)
+    session.flush()
+    return True
+
+
+def restore_folder(
+    session: Session,
+    *,
+    tenant_id: str,
+    owner_type: str,
+    owner_id: str,
+    user_id: str,
+    path: str,
+    recursive: bool,
+    is_admin: bool,
+) -> tuple[int, int]:
+    ensure_owner_access(
+        session,
+        tenant_id=tenant_id,
+        owner_type=owner_type,
+        owner_id=owner_id,
+        user_id=user_id,
+        is_admin=is_admin,
+    )
+    normalized = normalize_folder(path)
+    if not normalized:
+        raise FileStorageError("Folder path is required")
+    prefix = f"{normalized}/"
+    folders = _folder_owner_query(
+        session, tenant_id=tenant_id, owner_type=owner_type, owner_id=owner_id
+    ).filter(FileFolder.deleted_at.is_not(None))
+    assets = _asset_owner_query_by_values(
+        session, tenant_id=tenant_id, owner_type=owner_type, owner_id=owner_id
+    ).filter(FileAsset.deleted_at.is_not(None))
+    if recursive:
+        folders = folders.filter(
+            (FileFolder.path == normalized) | FileFolder.path.like(f"{prefix}%")
+        )
+        assets = assets.filter(FileAsset.display_path.like(f"{prefix}%"))
+    else:
+        folders = folders.filter(FileFolder.path == normalized)
+        assets = assets.filter(False)
+    folder_rows = folders.order_by(FileFolder.path.asc()).all()
+    asset_rows = assets.order_by(FileAsset.display_path.asc()).all()
+    if not folder_rows:
+        raise FileStorageError("Deleted folder not found")
+    for folder in folder_rows:
+        collision = _folder_owner_query(
+            session,
+            tenant_id=tenant_id,
+            owner_type=owner_type,
+            owner_id=owner_id,
+        ).filter(
+            FileFolder.id != folder.id,
+            FileFolder.path == folder.path,
+            FileFolder.deleted_at.is_(None),
+        ).first()
+        if collision is not None:
+            raise FileStorageError(
+                f"The folder cannot be restored because its path is in use: {folder.path}"
+            )
+    for asset in asset_rows:
+        collision = _asset_owner_query(session, asset).filter(
+            FileAsset.id != asset.id,
+            FileAsset.display_path == asset.display_path,
+            FileAsset.deleted_at.is_(None),
+        ).first()
+        if collision is not None:
+            raise FileStorageError(
+                f"A file cannot be restored because its path is in use: {asset.display_path}"
+            )
+    for folder in folder_rows:
+        folder.deleted_at = None
+        session.add(folder)
+    for asset in asset_rows:
+        asset.deleted_at = None
+        asset.lifecycle_revision += 1
+        session.add(asset)
+    session.flush()
+    return len(folder_rows), len(asset_rows)
+
+
+def restore_connector_space(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str,
+    space_id: str,
+    is_admin: bool,
+) -> FileConnectorSpace:
+    space = session.get(FileConnectorSpace, space_id)
+    if space is None or space.tenant_id != tenant_id or space.deleted_at is None:
+        raise FileStorageError("Deleted connector space not found")
+    ensure_owner_access(
+        session,
+        tenant_id=tenant_id,
+        owner_type=space.owner_type,
+        owner_id=connector_space_owner_id(space),
+        user_id=user_id,
+        is_admin=is_admin,
+    )
+    collision = _connector_space_owner_query(session, space).filter(
+        FileConnectorSpace.id != space.id,
+        FileConnectorSpace.label == space.label,
+        FileConnectorSpace.deleted_at.is_(None),
+    ).first()
+    if collision is not None:
+        raise FileStorageError(
+            "The connector space cannot be restored because its label is in use"
+        )
+    space.deleted_at = None
+    space.is_active = True
+    session.add(space)
+    session.flush()
+    return space
+
+
+def preview_asset_purge(
+    session: Session, *, tenant_id: str, file_ids: Iterable[str]
+) -> PurgePreview:
+    normalized_ids = sorted(set(str(value).strip() for value in file_ids if str(value).strip()))
+    if not normalized_ids or len(normalized_ids) > 100:
+        raise FileStorageError("Purge preview must contain between 1 and 100 files")
+    assets = (
+        session.query(FileAsset)
+        .filter(FileAsset.tenant_id == tenant_id, FileAsset.id.in_(normalized_ids))
+        .order_by(FileAsset.id.asc())
+        .all()
+    )
+    by_id = {asset.id: asset for asset in assets}
+    items: list[PurgePreviewItem] = []
+    for file_id in normalized_ids:
+        asset = by_id.get(file_id)
+        if asset is None:
+            items.append(
+                PurgePreviewItem(
+                    file_id=file_id,
+                    filename="",
+                    lifecycle_revision=0,
+                    deleted_at=None,
+                    retained_until=None,
+                    legal_hold=False,
+                    blockers=("not_found",),
+                    blob_ids=(),
+                )
+            )
+            continue
+        blockers = _asset_purge_blockers(session, asset)
+        blob_ids = tuple(
+            sorted(
+                row[0]
+                for row in session.query(FileVersion.blob_id)
+                .filter(FileVersion.file_asset_id == asset.id)
+                .distinct()
+                .all()
+            )
+        )
+        items.append(
+            PurgePreviewItem(
+                file_id=asset.id,
+                filename=asset.filename,
+                lifecycle_revision=asset.lifecycle_revision,
+                deleted_at=asset.deleted_at,
+                retained_until=asset.retained_until,
+                legal_hold=asset.legal_hold,
+                blockers=tuple(blockers),
+                blob_ids=blob_ids,
+            )
+        )
+    payload = [item.digest_payload() for item in items]
+    digest = hashlib.sha256(
+        json.dumps(payload, sort_keys=True, separators=(",", ":")).encode("utf-8")
+    ).hexdigest()
+    return PurgePreview(preview_sha256=digest, items=tuple(items))
+
+
+def execute_asset_purge(
+    session: Session,
+    *,
+    tenant_id: str,
+    file_ids: Iterable[str],
+    preview_sha256: str,
+    idempotency_key: str,
+    approval_reference: str,
+    before_commit: Callable[[list[FileAsset]], None] | None = None,
+) -> PurgeResult:
+    normalized_ids = sorted(set(str(value).strip() for value in file_ids if str(value).strip()))
+    if not normalized_ids or len(normalized_ids) > 100:
+        raise FileStorageError("Purge must contain between 1 and 100 files")
+    request = {
+        "tenant_id": tenant_id,
+        "file_ids": normalized_ids,
+        "preview_sha256": preview_sha256,
+        "approval_reference": approval_reference,
+    }
+    try:
+        started = begin_durable_recovery_operation(
+            get_database().SessionLocal,
+            identity=process_runtime_identity(),
+            module_id="files",
+            operation_type="asset-hard-purge",
+            idempotency_key=f"files-asset-purge:{idempotency_key}",
+            request=request,
+            recovery_plan=RecoveryPlan(
+                mode=RecoveryMode.IRREVERSIBLE,
+                preconditions=(
+                    "the actor holds the dedicated Files purge permission",
+                    "the signed-off preview still matches current lifecycle state",
+                    "every target is soft-deleted and free of retention or legal-hold blockers",
+                ),
+                verification_steps=(
+                    "verify every target FileAsset and FileVersion row is absent",
+                    "recalculate retained FileBlob reference counts before later garbage collection",
+                ),
+                approval_reference=approval_reference,
+            ),
+            precondition_evidence={
+                "preview_sha256": preview_sha256,
+                "target_count": len(normalized_ids),
+            },
+            lease_resource_key=f"files:purge:{tenant_id}",
+            lease_ttl_seconds=15 * 60,
+            resource_type="file_asset_batch",
+            resource_id=preview_sha256,
+            metadata={"resources": ["postgresql"], "bounded_target_count": len(normalized_ids)},
+            block_unresolved_resource=True,
+        )
+    except (RecoveryOperationBusy, RecoveryOperationStateConflict) as exc:
+        raise FileStorageError(
+            "Another purge or unresolved retry owns the tenant purge fence"
+        ) from exc
+    except (RecoveryGuaranteeError, RuntimeError, ValueError) as exc:
+        raise FileStorageError("The Files recovery ledger is unavailable; nothing was purged") from exc
+    if started.replayed or started.operation is None:
+        return PurgeResult(
+            recovery_operation_id=started.operation_id,
+            status=started.status,
+            replayed=True,
+            purged_files=0,
+            released_blobs=0,
+        )
+    operation = started.operation
+    try:
+        preview = preview_asset_purge(session, tenant_id=tenant_id, file_ids=normalized_ids)
+        if preview.preview_sha256 != preview_sha256:
+            operation.reject(
+                summary="The purge preview became stale before execution",
+                evidence=_verified_evidence(
+                    {"preview_matches": False},
+                    expected_preview_sha256=preview_sha256,
+                    observed_preview_sha256=preview.preview_sha256,
+                ),
+            )
+            raise FileStorageError("The purge preview is stale; preview again")
+        if not preview.eligible:
+            operation.reject(
+                summary="The purge was blocked by current lifecycle policy",
+                evidence=_verified_evidence(
+                    {"lifecycle_policy_allows": False},
+                    blocked_files=[
+                        {"file_id": item.file_id, "blockers": list(item.blockers)}
+                        for item in preview.items
+                        if item.blockers
+                    ]
+                ),
+            )
+            raise FileStorageError("One or more files are not eligible for purge")
+        assets = (
+            session.query(FileAsset)
+            .filter(FileAsset.tenant_id == tenant_id, FileAsset.id.in_(normalized_ids))
+            .with_for_update()
+            .all()
+        )
+        blob_ids = sorted({blob_id for item in preview.items for blob_id in item.blob_ids})
+        if before_commit is not None:
+            before_commit(assets)
+        session.query(FileShare).filter(
+            FileShare.file_asset_id.in_(normalized_ids)
+        ).delete(synchronize_session=False)
+        session.query(FileVersion).filter(
+            FileVersion.file_asset_id.in_(normalized_ids)
+        ).delete(synchronize_session=False)
+        for asset in assets:
+            session.delete(asset)
+        session.flush()
+        released_blobs = 0
+        for blob_id in blob_ids:
+            references = int(
+                session.query(func.count(FileVersion.id))
+                .filter(FileVersion.blob_id == blob_id)
+                .scalar()
+                or 0
+            )
+            blob = session.get(FileBlob, blob_id)
+            if blob is not None:
+                blob.ref_count = references
+                session.add(blob)
+                if references == 0:
+                    released_blobs += 1
+        operation.commit_verified_success(
+            session,
+            evidence=_verified_evidence(
+                {
+                    "assets_absent": True,
+                    "versions_absent": True,
+                    "blob_reference_counts_recalculated": True,
+                },
+                purged_file_ids=normalized_ids,
+                purged_files=len(assets),
+                released_blobs=released_blobs,
+                preview_sha256=preview_sha256,
+            ),
+        )
+        return PurgeResult(
+            recovery_operation_id=started.operation_id,
+            status=RecoveryStatus.SUCCEEDED.value,
+            replayed=False,
+            purged_files=len(assets),
+            released_blobs=released_blobs,
+        )
+    except FileStorageError:
+        session.rollback()
+        if not operation.closed:
+            operation.release_unresolved()
+        raise
+    except Exception as exc:
+        session.rollback()
+        if not operation.closed:
+            operation.reject(
+                summary="The purge failed before its database transaction committed",
+                evidence=_verified_evidence(
+                    {"database_transaction_committed": False},
+                    exception_type=type(exc).__name__,
+                ),
+            )
+        raise
+
+
+def garbage_collect_unreferenced_blobs(
+    session: Session,
+    *,
+    tenant_id: str,
+    limit: int,
+    approval_reference: str,
+) -> BlobGcResult:
+    candidate_rows = (
+        session.query(FileBlob)
+        .filter(FileBlob.tenant_id == tenant_id)
+        .filter(
+            or_(FileBlob.retained_until.is_(None), FileBlob.retained_until <= utcnow())
+        )
+        .filter(
+            ~session.query(FileVersion.id)
+            .filter(FileVersion.blob_id == FileBlob.id)
+            .exists()
+        )
+        .order_by(FileBlob.created_at.asc(), FileBlob.id.asc())
+        .limit(limit)
+        .all()
+    )
+    candidates = tuple(
+        (row.id, row.storage_key) for row in candidate_rows
+    )
+    # Close the read snapshot before the independent recovery transaction takes
+    # its durable SQLite/PostgreSQL write lock.
+    session.commit()
+    deleted = 0
+    unresolved: list[str] = []
+    backend = get_storage_backend()
+    for candidate_id, storage_key in candidates:
+        key_digest = hashlib.sha256(storage_key.encode("utf-8")).hexdigest()
+        request = {
+            "tenant_id": tenant_id,
+            "blob_id": candidate_id,
+            "storage_key_sha256": key_digest,
+            "approval_reference": approval_reference,
+        }
+        try:
+            started = begin_durable_recovery_operation(
+                get_database().SessionLocal,
+                identity=process_runtime_identity(),
+                module_id="files",
+                operation_type="blob-garbage-collection",
+                idempotency_key=(
+                    f"files-blob-gc:{candidate_id}:{key_digest[:12]}:"
+                    f"{hashlib.sha256(approval_reference.encode('utf-8')).hexdigest()[:12]}"
+                ),
+                request=request,
+                recovery_plan=RecoveryPlan(
+                    mode=RecoveryMode.FORWARD_RECOVERY,
+                    preconditions=(
+                        "the caller holds dedicated Files purge authority",
+                        "a fresh database check shows no FileVersion reference",
+                    ),
+                    forward_recovery_steps=(
+                        "verify the object is absent",
+                        "delete the unreferenced FileBlob row after absence is proven",
+                    ),
+                    verification_steps=(
+                        "recheck FileVersion references while holding the blob fence",
+                        "probe the exact managed storage key after deletion",
+                    ),
+                    approval_reference=approval_reference,
+                ),
+                precondition_evidence={
+                    "blob_id": candidate_id,
+                    "storage_key_sha256": key_digest,
+                    "observed_reference_count": 0,
+                },
+                lease_resource_key=f"files:blob:{tenant_id}:{candidate_id}",
+                lease_ttl_seconds=15 * 60,
+                resource_type="file_blob",
+                resource_id=candidate_id,
+                metadata={"resources": ["postgresql", "object-storage"], "storage_backend": backend.name},
+                block_unresolved_resource=True,
+            )
+        except (RecoveryOperationBusy, RecoveryOperationStateConflict):
+            continue
+        except (RecoveryGuaranteeError, RuntimeError, ValueError) as exc:
+            raise FileStorageError(
+                "The Files recovery ledger is unavailable; no blob bytes were deleted"
+            ) from exc
+        if started.replayed or started.operation is None:
+            continue
+        operation = started.operation
+        try:
+            blob = (
+                session.query(FileBlob)
+                .filter(FileBlob.id == candidate_id, FileBlob.tenant_id == tenant_id)
+                .with_for_update()
+                .one_or_none()
+            )
+            references = int(
+                session.query(func.count(FileVersion.id))
+                .filter(FileVersion.blob_id == candidate_id)
+                .scalar()
+                or 0
+            )
+            blob_retained = bool(
+                blob is not None
+                and blob.retained_until is not None
+                and _as_utc(blob.retained_until) > utcnow()
+            )
+        except Exception as exc:
+            session.rollback()
+            if not operation.closed:
+                operation.reject(
+                    summary="Blob eligibility could not be rechecked before deletion",
+                    evidence=_verified_evidence(
+                        {"external_effect_started": False},
+                        exception_type=type(exc).__name__,
+                    ),
+                )
+            raise FileStorageError(
+                "Blob eligibility could not be rechecked; no bytes were deleted"
+            ) from exc
+        if blob is None or references or blob_retained:
+            operation.reject(
+                summary="Blob garbage collection was no longer eligible",
+                evidence=_verified_evidence(
+                    {
+                        "blob_present": blob is not None,
+                        "reference_count_zero": references == 0,
+                        "blob_retention_expired": not blob_retained,
+                    },
+                    reference_count=references,
+                ),
+            )
+            session.rollback()
+            continue
+        try:
+            backend.delete(blob.storage_key)
+            object_present = backend.exists(blob.storage_key)
+        except (StorageBackendError, OSError) as exc:
+            try:
+                object_present = backend.exists(blob.storage_key)
+            except (StorageBackendError, OSError):
+                object_present = None
+            session.rollback()
+            if object_present is True:
+                operation.fail(
+                    summary="The unreferenced blob object was retained",
+                    evidence={"object_present": True, "exception_type": type(exc).__name__},
+                )
+            else:
+                operation.unresolved(
+                    status=RecoveryStatus.OUTCOME_UNKNOWN,
+                    summary="The blob deletion outcome could not be verified",
+                    evidence={"object_present": object_present, "exception_type": type(exc).__name__},
+                    failure_summary="Reconcile the exact blob key before retrying garbage collection",
+                )
+                unresolved.append(started.operation_id)
+            continue
+        if object_present:
+            session.rollback()
+            operation.fail(
+                summary="The object store did not delete the unreferenced blob",
+                evidence={"object_present": True},
+            )
+            continue
+        try:
+            session.delete(blob)
+            session.flush()
+            operation.commit_verified_success(
+                session,
+                evidence=_verified_evidence(
+                    {
+                        "object_absent": True,
+                        "database_blob_absent": True,
+                        "reference_count_zero": True,
+                    },
+                    blob_id=candidate_id,
+                    storage_key_sha256=key_digest,
+                    object_present=False,
+                    database_blob_present=False,
+                    reference_count=0,
+                ),
+            )
+            deleted += 1
+        except Exception as exc:
+            session.rollback()
+            if not operation.closed:
+                operation.unresolved(
+                    status=RecoveryStatus.RECOVERY_REQUIRED,
+                    summary="The object is absent but blob metadata still requires forward recovery",
+                    evidence={"object_present": False, "exception_type": type(exc).__name__},
+                    failure_summary="Delete the FileBlob row only after rechecking all FileVersion references",
+                )
+            unresolved.append(started.operation_id)
+    return BlobGcResult(
+        inspected_blobs=len(candidates),
+        deleted_blobs=deleted,
+        unresolved_operation_ids=tuple(unresolved),
+    )
+
+
+def _asset_purge_blockers(session: Session, asset: FileAsset) -> list[str]:
+    blockers: list[str] = []
+    if asset.deleted_at is None:
+        blockers.append("not_soft_deleted")
+    if asset.legal_hold:
+        blockers.append("legal_hold")
+    if asset.retained_until is not None and _as_utc(asset.retained_until) > utcnow():
+        blockers.append("retention_active")
+    if _table_exists(session, CampaignAttachmentUse.__tablename__) and session.query(
+        CampaignAttachmentUse.id
+    ).filter(CampaignAttachmentUse.file_asset_id == asset.id).first() is not None:
+        blockers.append("campaign_evidence")
+    if _table_exists(session, FileFormEvidenceGrant.__tablename__) and session.query(
+        FileFormEvidenceGrant.id
+    ).filter(FileFormEvidenceGrant.file_asset_id == asset.id).first() is not None:
+        blockers.append("form_evidence")
+    if session.query(FileShare.id).filter(
+        FileShare.file_asset_id == asset.id,
+        effective_file_share_clause(),
+    ).first() is not None:
+        blockers.append("active_share")
+    return blockers
+
+
+def _asset_owner_id(asset: FileAsset) -> str:
+    owner_id = asset.owner_user_id if asset.owner_type == "user" else asset.owner_group_id
+    if not owner_id:
+        raise FileStorageError("File has no valid owner")
+    return owner_id
+
+
+def _asset_owner_query(session: Session, asset: FileAsset):
+    return _asset_owner_query_by_values(
+        session,
+        tenant_id=asset.tenant_id,
+        owner_type=asset.owner_type,
+        owner_id=_asset_owner_id(asset),
+    )
+
+
+def _asset_owner_query_by_values(
+    session: Session, *, tenant_id: str, owner_type: str, owner_id: str
+):
+    query = session.query(FileAsset).filter(
+        FileAsset.tenant_id == tenant_id, FileAsset.owner_type == owner_type
+    )
+    if owner_type == "user":
+        return query.filter(FileAsset.owner_user_id == owner_id)
+    if owner_type == "group":
+        return query.filter(FileAsset.owner_group_id == owner_id)
+    raise FileStorageError("Files must be owned by a user or group")
+
+
+def _folder_owner_query(
+    session: Session, *, tenant_id: str, owner_type: str, owner_id: str
+):
+    query = session.query(FileFolder).filter(
+        FileFolder.tenant_id == tenant_id, FileFolder.owner_type == owner_type
+    )
+    if owner_type == "user":
+        return query.filter(FileFolder.owner_user_id == owner_id)
+    if owner_type == "group":
+        return query.filter(FileFolder.owner_group_id == owner_id)
+    raise FileStorageError("Folders must be owned by a user or group")
+
+
+def _connector_space_owner_query(session: Session, space: FileConnectorSpace):
+    query = session.query(FileConnectorSpace).filter(
+        FileConnectorSpace.tenant_id == space.tenant_id,
+        FileConnectorSpace.owner_type == space.owner_type,
+    )
+    owner_id = connector_space_owner_id(space)
+    if space.owner_type == "user":
+        return query.filter(FileConnectorSpace.owner_user_id == owner_id)
+    return query.filter(FileConnectorSpace.owner_group_id == owner_id)
+
+
+def _as_utc(value: datetime) -> datetime:
+    return value.replace(tzinfo=UTC) if value.tzinfo is None else value.astimezone(UTC)
+
+
+def _iso(value: datetime | None) -> str | None:
+    return _as_utc(value).isoformat() if value is not None else None
+
+
+def _table_exists(session: Session, table_name: str) -> bool:
+    return bool(session.bind is not None and inspect(session.bind).has_table(table_name))
+
+
+def _verified_evidence(
+    checks: dict[str, object], **details: object
+) -> dict[str, object]:
+    return {"verified": True, "checks": checks, **details}
+
+
+__all__ = [
+    "BlobGcResult",
+    "PurgePreview",
+    "PurgePreviewItem",
+    "PurgeResult",
+    "execute_asset_purge",
+    "garbage_collect_unreferenced_blobs",
+    "get_asset_for_lifecycle",
+    "preview_asset_purge",
+    "restore_asset",
+    "restore_connector_space",
+    "restore_folder",
+    "set_asset_lifecycle",
+]

src/govoplan_files/backend/storage/provenance.py

@@ -0,0 +1,90 @@
+from __future__ import annotations
+
+from collections.abc import Mapping
+from typing import Any
+
+
+SOURCE_PROVENANCE_METADATA_KEY = "source_provenance"
+SOURCE_REVISION_METADATA_KEY = "source_revision"
+
+_PROVENANCE_STRING_FIELDS = {
+    "source_type",
+    "connector_id",
+    "provider",
+    "external_id",
+    "external_path",
+    "external_url",
+    "revision",
+    "revision_label",
+    "observed_at",
+    "imported_at",
+}
+
+
+def normalize_source_revision(value: object) -> str | None:
+    if value is None:
+        return None
+    text = str(value).strip()
+    return text or None
+
+
+def normalize_source_provenance(value: object, *, source_revision: object = None) -> dict[str, Any] | None:
+    if value is None:
+        revision = normalize_source_revision(source_revision)
+        return {"revision": revision} if revision else None
+    if not isinstance(value, Mapping):
+        raise ValueError("source_provenance must be a JSON object")
+
+    payload: dict[str, Any] = {}
+    for field in _PROVENANCE_STRING_FIELDS:
+        normalized = normalize_source_revision(value.get(field))
+        if normalized:
+            payload[field] = normalized
+
+    extra = value.get("metadata")
+    if isinstance(extra, Mapping) and extra:
+        payload["metadata"] = dict(extra)
+    elif extra is not None and extra != "":
+        raise ValueError("source_provenance.metadata must be a JSON object")
+
+    revision = normalize_source_revision(source_revision)
+    if revision:
+        payload["revision"] = revision
+    return payload or None
+
+
+def source_metadata(
+    *,
+    existing: Mapping[str, Any] | None = None,
+    source_provenance: object = None,
+    source_revision: object = None,
+) -> dict[str, Any] | None:
+    payload = dict(existing or {})
+    normalized_provenance = normalize_source_provenance(source_provenance, source_revision=source_revision)
+    normalized_revision = normalize_source_revision(source_revision)
+    if normalized_provenance:
+        payload[SOURCE_PROVENANCE_METADATA_KEY] = normalized_provenance
+    if normalized_revision:
+        payload[SOURCE_REVISION_METADATA_KEY] = normalized_revision
+    elif normalized_provenance and normalized_provenance.get("revision"):
+        payload[SOURCE_REVISION_METADATA_KEY] = str(normalized_provenance["revision"])
+    return payload or None
+
+
+def source_provenance_from_metadata(metadata: Mapping[str, Any] | None) -> dict[str, Any] | None:
+    if not isinstance(metadata, Mapping):
+        return None
+    value = metadata.get(SOURCE_PROVENANCE_METADATA_KEY)
+    if isinstance(value, Mapping):
+        return dict(value)
+    return None
+
+
+def source_revision_from_metadata(metadata: Mapping[str, Any] | None) -> str | None:
+    if not isinstance(metadata, Mapping):
+        return None
+    revision = normalize_source_revision(metadata.get(SOURCE_REVISION_METADATA_KEY))
+    if revision:
+        return revision
+    provenance = source_provenance_from_metadata(metadata)
+    return normalize_source_revision(provenance.get("revision") if provenance else None)

src/govoplan_files/backend/storage/recovery.py

@@ -0,0 +1,931 @@
+from __future__ import annotations
+
+from collections.abc import Callable
+from dataclasses import dataclass
+from datetime import UTC, datetime
+import hashlib
+from threading import Lock
+from typing import Protocol
+
+from sqlalchemy import event, select
+from sqlalchemy.orm import Session
+
+from govoplan_core.core.recovery import (
+    RecoveryGuaranteeError,
+    RecoveryMode,
+    RecoveryOperation,
+    RecoveryPlan,
+    RecoveryStatus,
+    plan_recovery_operation,
+    prepare_recovery_operation,
+    start_recovery_operation,
+    verify_recovery_evidence_chain,
+)
+from govoplan_core.core.recovery_runtime import (
+    DurableRecoveryOperation,
+    DurableRecoveryStart,
+    RecoveryOperationBusy,
+    RecoveryOperationStateConflict,
+    begin_durable_recovery_operation,
+)
+from govoplan_core.core.runtime_coordination import (
+    RuntimeIdentity,
+    acquire_lease,
+    process_runtime_identity,
+    release_lease,
+)
+from govoplan_core.db.session import get_database
+from govoplan_files.backend.db.models import (
+    FileBlob,
+    FileIntegrityFinding,
+    FileIntegrityScan,
+)
+from govoplan_files.backend.storage.backends import (
+    StorageBackend,
+    StorageBackendError,
+    StorageObjectMissing,
+)
+from govoplan_files.backend.storage.common import FileStorageError
+
+
+_PENDING_EFFECTS_KEY = "govoplan_files_pending_recovery_effects"
+_HOOKS_INSTALLED_KEY = "govoplan_files_recovery_hooks_installed"
+_ROLLBACK_ERRORS_KEY = "govoplan_files_recovery_rollback_errors"
+_SQLITE_FENCES: set[str] = set()
+_SQLITE_FENCES_LOCK = Lock()
+
+
+class _PendingEffect(Protocol):
+    def settle(self, *, committed: bool) -> None: ...
+
+
+@dataclass(slots=True)
+class PendingBlobWrite:
+    operation: DurableRecoveryOperation
+    backend: StorageBackend
+    tenant_id: str
+    blob_id: str
+    storage_key: str
+    semantic_checksum_sha256: str
+    semantic_size_bytes: int
+    protection_discriminator: str
+    created_new: bool
+    expected_storage_checksum_sha256: str | None = None
+    expected_storage_size_bytes: int | None = None
+    expected_envelope_id: str | None = None
+    sqlite_fence_key: str | None = None
+    restart_after_rollback: Callable[[], DurableRecoveryOperation] | None = None
+
+    def prepare_stored_bytes(
+        self,
+        data: bytes,
+        *,
+        envelope_id: str | None,
+    ) -> None:
+        """Retain process-local verification evidence without recording content."""
+
+        self.expected_storage_checksum_sha256 = hashlib.sha256(data).hexdigest()
+        self.expected_storage_size_bytes = len(data)
+        self.expected_envelope_id = envelope_id
+
+    def settle(self, *, committed: bool) -> None:
+        if not committed and self.restart_after_rollback is not None:
+            try:
+                self.operation = self.restart_after_rollback()
+            except Exception:
+                # SQLite cannot make the pre-effect ledger row independent of
+                # the caller transaction. If reconstructing the evidence row
+                # also fails, still avoid leaving a known new orphan behind.
+                if self.created_new:
+                    try:
+                        self.backend.delete(self.storage_key)
+                    except (StorageBackendError, OSError):
+                        pass
+                raise
+        evidence = _blob_write_evidence(self)
+        if _blob_write_complete(evidence):
+            self.operation.succeed(evidence=evidence)
+            return
+
+        if self.created_new and evidence.get("database_blob_present") is False:
+            self._settle_unreferenced_new_object(evidence)
+            return
+
+        if not self.created_new and _object_matches(evidence):
+            if _forward_complete_blob_repair(self):
+                completed = _blob_write_evidence(self)
+                if _blob_write_complete(completed):
+                    self.operation.succeed(evidence=completed)
+                    return
+
+        if evidence.get("database_blob_present") is True and not _object_matches(
+            evidence
+        ):
+            _quarantine_blob_after_failed_verification(self, evidence)
+            evidence = _blob_write_evidence(self)
+
+        status = (
+            RecoveryStatus.OUTCOME_UNKNOWN
+            if not evidence.get("verified")
+            else RecoveryStatus.RECOVERY_REQUIRED
+        )
+        transaction = "committed" if committed else "rolled back"
+        self.operation.unresolved(
+            status=status,
+            summary=f"Managed Files blob write remained unresolved after the database transaction {transaction}",
+            evidence=evidence,
+            failure_summary=(
+                "The managed object and Files blob metadata require reconciliation"
+            ),
+        )
+
+    def _settle_unreferenced_new_object(self, evidence: dict[str, object]) -> None:
+        object_present = evidence.get("object_present")
+        if object_present is False:
+            self.operation.reject(
+                summary="The Files blob write left no durable object or database row",
+                evidence=evidence,
+            )
+            return
+        if object_present is not True:
+            self.operation.unresolved(
+                status=RecoveryStatus.OUTCOME_UNKNOWN,
+                summary="The unreferenced Files object could not be probed",
+                evidence=evidence,
+                failure_summary="Object storage availability prevented upload compensation",
+            )
+            return
+        try:
+            self.backend.delete(self.storage_key)
+        except (StorageBackendError, OSError):
+            self.operation.unresolved(
+                status=RecoveryStatus.RECOVERY_REQUIRED,
+                summary="An unreferenced Files object could not be compensated",
+                evidence=evidence,
+                failure_summary="Delete the unreferenced managed object after verifying that no FileBlob references it",
+            )
+            return
+        recovered = _blob_write_evidence(self)
+        if (
+            recovered.get("verified") is True
+            and recovered.get("database_blob_present") is False
+            and recovered.get("object_present") is False
+        ):
+            self.operation.compensate(
+                failure_summary="The Files database transaction did not retain the new blob",
+                failure_evidence=evidence,
+                recovery_evidence=recovered,
+            )
+            return
+        self.operation.unresolved(
+            status=RecoveryStatus.RECOVERY_REQUIRED,
+            summary="Files upload compensation could not be verified",
+            evidence=recovered,
+            failure_summary="The unreferenced managed object requires operator reconciliation",
+        )
+
+
+@dataclass(slots=True)
+class PendingOrphanCleanup:
+    operation: DurableRecoveryOperation
+    backend: StorageBackend
+    finding_id: str
+    tenant_id: str
+    storage_key: str
+    resolved_by_user_id: str
+
+    def settle(self, *, committed: bool) -> None:
+        del committed
+        evidence = _orphan_cleanup_evidence(self)
+        if _orphan_cleanup_complete(evidence):
+            self.operation.succeed(evidence=evidence)
+            return
+        if (
+            evidence.get("verified") is True
+            and evidence.get("object_present") is True
+            and evidence.get("finding_deleted") is False
+        ):
+            self.operation.reject(
+                summary="The orphan object was retained and the cleanup finding stayed open",
+                evidence=evidence,
+            )
+            return
+        if evidence.get("object_present") is False:
+            if _forward_complete_orphan_finding(self):
+                completed = _orphan_cleanup_evidence(self)
+                if _orphan_cleanup_complete(completed):
+                    self.operation.succeed(evidence=completed)
+                    return
+        status = (
+            RecoveryStatus.OUTCOME_UNKNOWN
+            if not evidence.get("verified")
+            else RecoveryStatus.RECOVERY_REQUIRED
+        )
+        self.operation.unresolved(
+            status=status,
+            summary="Files orphan cleanup requires reconciliation",
+            evidence=evidence,
+            failure_summary="Recheck the object and integrity-finding state before another cleanup attempt",
+        )
+
+
+def begin_blob_write_recovery(
+    session: Session,
+    *,
+    backend: StorageBackend,
+    tenant_id: str,
+    blob_id: str,
+    storage_key: str,
+    semantic_checksum_sha256: str,
+    semantic_size_bytes: int,
+    protection_discriminator: str,
+    created_new: bool,
+    repair_token: str | None = None,
+) -> PendingBlobWrite:
+    disposition = "create" if created_new else "repair"
+    state_token = repair_token or blob_id
+    key_digest = hashlib.sha256(storage_key.encode("utf-8")).hexdigest()
+    idempotency_key = (
+        f"files-blob-{disposition}:{blob_id}:{state_token[:48]}"
+    )
+    try:
+        identity = process_runtime_identity()
+    except RuntimeError as exc:
+        raise FileStorageError(
+            "The Files recovery ledger is unavailable; no object was written"
+        ) from exc
+    lease_resource_key = f"files:blob:{tenant_id}:{blob_id}"
+    request = {
+        "tenant_id": tenant_id,
+        "blob_id": blob_id,
+        "storage_key": storage_key if created_new else None,
+        "storage_key_sha256": key_digest,
+        "semantic_checksum_sha256": semantic_checksum_sha256,
+        "semantic_size_bytes": semantic_size_bytes,
+        "protection_discriminator": protection_discriminator,
+        "disposition": disposition,
+    }
+    recovery_plan = RecoveryPlan(
+        mode=(
+            RecoveryMode.COMPENSATION
+            if created_new
+            else RecoveryMode.FORWARD_RECOVERY
+        ),
+        preconditions=(
+            "the caller has Files write authority for the target owner",
+            "the storage key belongs to the tenant Files namespace",
+            "the request records digests rather than file contents",
+        ),
+        compensation_steps=(
+            "verify that no FileBlob references the newly reserved key",
+            "delete only that unreferenced key and verify absence",
+        )
+        if created_new
+        else (),
+        forward_recovery_steps=(
+            "verify the expected bytes at the existing blob key",
+            "forward-complete matching integrity metadata or quarantine the blob",
+        )
+        if not created_new
+        else (),
+        verification_steps=(
+            "reload FileBlob metadata through an independent session",
+            "stream and hash the managed object independently",
+        ),
+    )
+    precondition_evidence = {
+        "blob_id": blob_id,
+        "storage_key_sha256": key_digest,
+        "semantic_checksum_sha256": semantic_checksum_sha256,
+        "semantic_size_bytes": semantic_size_bytes,
+        "created_new": created_new,
+    }
+    metadata = {
+        "resources": ["postgresql", "object-storage"],
+        "storage_backend": backend.name,
+        "durability_mode": "independent_transaction",
+    }
+    session_factory = get_database().SessionLocal
+    sqlite_mode = session.get_bind().dialect.name == "sqlite"
+    sqlite_fence_key: str | None = None
+
+    def start_independent(*, reconstructed_after_rollback: bool = False) -> DurableRecoveryStart:
+        return begin_durable_recovery_operation(
+            session_factory,
+            identity=identity,
+            module_id="files",
+            operation_type=f"blob-{disposition}",
+            idempotency_key=idempotency_key,
+            request=request,
+            recovery_plan=recovery_plan,
+            precondition_evidence={
+                **precondition_evidence,
+                **(
+                    {
+                        "sqlite_caller_transaction_rolled_back": True,
+                        "effect_may_have_preceded_durable_intent": True,
+                    }
+                    if reconstructed_after_rollback
+                    else {}
+                ),
+            },
+            lease_resource_key=lease_resource_key,
+            lease_ttl_seconds=15 * 60,
+            resource_type="file_blob",
+            resource_id=blob_id,
+            metadata={
+                **metadata,
+                "durability_mode": (
+                    "sqlite_post_rollback_reconstruction"
+                    if reconstructed_after_rollback
+                    else "independent_transaction"
+                ),
+            },
+        )
+
+    try:
+        if sqlite_mode:
+            _reserve_sqlite_fence(lease_resource_key)
+            sqlite_fence_key = lease_resource_key
+            started = _begin_caller_transaction_recovery_operation(
+                session,
+                session_factory=session_factory,
+                identity=identity,
+                module_id="files",
+                operation_type=f"blob-{disposition}",
+                idempotency_key=idempotency_key,
+                request=request,
+                recovery_plan=recovery_plan,
+                precondition_evidence={
+                    **precondition_evidence,
+                    "sqlite_caller_transaction": True,
+                    "reduced_crash_durability": True,
+                },
+                lease_resource_key=lease_resource_key,
+                lease_ttl_seconds=15 * 60,
+                resource_type="file_blob",
+                resource_id=blob_id,
+                metadata={
+                    **metadata,
+                    "resources": ["sqlite", "object-storage"],
+                    "durability_mode": "sqlite_caller_transaction",
+                },
+            )
+        else:
+            started = start_independent()
+    except (RecoveryOperationBusy, RecoveryOperationStateConflict) as exc:
+        if sqlite_fence_key is not None:
+            _release_sqlite_fence(sqlite_fence_key)
+        raise FileStorageError(
+            "This managed blob is already owned by another recovery operation"
+        ) from exc
+    except (RecoveryGuaranteeError, RuntimeError) as exc:
+        if sqlite_fence_key is not None:
+            _release_sqlite_fence(sqlite_fence_key)
+        raise FileStorageError(
+            "The Files recovery ledger is unavailable; no object was written"
+        ) from exc
+    if started.replayed or started.operation is None:
+        if sqlite_fence_key is not None:
+            _release_sqlite_fence(sqlite_fence_key)
+        raise FileStorageError(
+            "The matching Files blob operation was already completed; reload before retrying"
+        )
+    pending = PendingBlobWrite(
+        operation=started.operation,
+        backend=backend,
+        tenant_id=tenant_id,
+        blob_id=blob_id,
+        storage_key=storage_key,
+        semantic_checksum_sha256=semantic_checksum_sha256,
+        semantic_size_bytes=semantic_size_bytes,
+        protection_discriminator=protection_discriminator,
+        created_new=created_new,
+        sqlite_fence_key=sqlite_fence_key,
+        restart_after_rollback=(
+            lambda: _require_started_operation(
+                start_independent(reconstructed_after_rollback=True)
+            )
+            if sqlite_mode
+            else None
+        ),
+    )
+    _register_pending_effect(session, pending)
+    return pending
+
+
+def begin_orphan_cleanup_recovery(
+    session: Session,
+    finding: FileIntegrityFinding,
+    *,
+    backend: StorageBackend,
+    user_id: str,
+) -> PendingOrphanCleanup:
+    key_digest = hashlib.sha256(finding.storage_key.encode("utf-8")).hexdigest()
+    try:
+        started = begin_durable_recovery_operation(
+            get_database().SessionLocal,
+            identity=process_runtime_identity(),
+            module_id="files",
+            operation_type="integrity-orphan-cleanup",
+            idempotency_key=f"files-orphan-cleanup:{finding.id}",
+            request={
+                "tenant_id": finding.tenant_id,
+                "finding_id": finding.id,
+                "storage_key_sha256": key_digest,
+            },
+            recovery_plan=RecoveryPlan(
+                mode=RecoveryMode.FORWARD_RECOVERY,
+                preconditions=(
+                    "the integrity finding identifies an unreferenced object",
+                    "the object key remains inside the completed scan scope",
+                    "a fresh database reference check found no FileBlob",
+                ),
+                forward_recovery_steps=(
+                    "verify object absence independently",
+                    "mark the durable finding deleted only after absence is proven",
+                ),
+                verification_steps=(
+                    "reload the finding and its scan through an independent session",
+                    "probe the original storage key through the configured backend",
+                ),
+            ),
+            precondition_evidence={
+                "finding_id": finding.id,
+                "scan_id": finding.scan_id,
+                "storage_key_sha256": key_digest,
+                "finding_state": finding.state,
+            },
+            lease_resource_key=(
+                f"files:orphan-cleanup:{finding.tenant_id}:{key_digest[:40]}"
+            ),
+            lease_ttl_seconds=15 * 60,
+            resource_type="file_integrity_finding",
+            resource_id=finding.id,
+            metadata={
+                "resources": ["postgresql", "object-storage"],
+                "storage_backend": backend.name,
+            },
+        )
+    except (RecoveryOperationBusy, RecoveryOperationStateConflict) as exc:
+        raise FileStorageError(
+            "This orphan object is already owned by another recovery operation"
+        ) from exc
+    except (RecoveryGuaranteeError, RuntimeError) as exc:
+        raise FileStorageError(
+            "The Files recovery ledger is unavailable; no object was deleted"
+        ) from exc
+    if started.replayed or started.operation is None:
+        raise FileStorageError(
+            "This orphan cleanup was already completed; reload the finding"
+        )
+    pending = PendingOrphanCleanup(
+        operation=started.operation,
+        backend=backend,
+        finding_id=finding.id,
+        tenant_id=finding.tenant_id,
+        storage_key=finding.storage_key,
+        resolved_by_user_id=user_id,
+    )
+    _register_pending_effect(session, pending)
+    return pending
+
+
+def _register_pending_effect(session: Session, effect: _PendingEffect) -> None:
+    if not session.in_transaction():
+        session.begin()
+    pending = session.info.setdefault(_PENDING_EFFECTS_KEY, [])
+    pending.append(effect)
+    if session.info.get(_HOOKS_INSTALLED_KEY):
+        return
+    event.listen(session, "after_commit", _after_session_commit)
+    event.listen(session, "after_rollback", _after_session_rollback)
+    session.info[_HOOKS_INSTALLED_KEY] = True
+
+
+def _after_session_commit(session: Session) -> None:
+    # SQLAlchemy also emits after_commit for a released SAVEPOINT. A Files
+    # batch may open one while creating a later recovery row; settle only when
+    # the outer business transaction has actually become visible.
+    if session.in_nested_transaction():
+        return
+    _settle_pending_effects(session, committed=True)
+
+
+def _after_session_rollback(session: Session) -> None:
+    if session.in_nested_transaction():
+        return
+    try:
+        _settle_pending_effects(session, committed=False)
+    except RecoveryGuaranteeError as exc:
+        session.info.setdefault(_ROLLBACK_ERRORS_KEY, []).append(str(exc))
+
+
+def _settle_pending_effects(session: Session, *, committed: bool) -> None:
+    pending = list(session.info.pop(_PENDING_EFFECTS_KEY, []))
+    failures: list[Exception] = []
+    for effect in pending:
+        try:
+            effect.settle(committed=committed)
+        except Exception as exc:  # preserve every effect's chance to settle
+            failures.append(exc)
+            operation = getattr(effect, "operation", None)
+            if operation is not None and not operation.closed:
+                try:
+                    operation.release_unresolved()
+                except Exception:
+                    pass
+        finally:
+            sqlite_fence_key = getattr(effect, "sqlite_fence_key", None)
+            if sqlite_fence_key:
+                _release_sqlite_fence(sqlite_fence_key)
+    if failures:
+        raise RecoveryGuaranteeError(
+            f"{len(failures)} Files recovery operation(s) could not be finalized"
+        ) from failures[0]
+
+
+def _reserve_sqlite_fence(resource_key: str) -> None:
+    with _SQLITE_FENCES_LOCK:
+        if resource_key in _SQLITE_FENCES:
+            raise RecoveryOperationBusy(
+                f"Another local SQLite transaction owns {resource_key}"
+            )
+        _SQLITE_FENCES.add(resource_key)
+
+
+def _release_sqlite_fence(resource_key: str) -> None:
+    with _SQLITE_FENCES_LOCK:
+        _SQLITE_FENCES.discard(resource_key)
+
+
+def _require_started_operation(started: DurableRecoveryStart) -> DurableRecoveryOperation:
+    if started.replayed or started.operation is None:
+        raise RecoveryOperationStateConflict(started.operation_id, started.status)
+    return started.operation
+
+
+def _begin_caller_transaction_recovery_operation(
+    session: Session,
+    *,
+    session_factory: Callable[[], Session],
+    identity: RuntimeIdentity,
+    module_id: str,
+    operation_type: str,
+    idempotency_key: str,
+    request: dict[str, object],
+    recovery_plan: RecoveryPlan,
+    precondition_evidence: dict[str, object],
+    lease_resource_key: str,
+    lease_ttl_seconds: int,
+    resource_type: str,
+    resource_id: str,
+    metadata: dict[str, object],
+) -> DurableRecoveryStart:
+    """Start SQLite recovery evidence inside the caller transaction.
+
+    SQLite permits only one writer, so opening the normal independent ledger
+    transaction after an earlier member of a batch has written will deadlock
+    until the busy timeout. The caller-transaction mode preserves fencing,
+    request hashing, checkpoints, commit verification, and rollback
+    compensation, but cannot make the intent survive a hard process loss
+    before the caller commits. PostgreSQL never uses this reduced mode.
+    """
+
+    claim = acquire_lease(
+        session,
+        installation_id=identity.installation_id,
+        resource_key=lease_resource_key,
+        holder_node_id=identity.node_id,
+        holder_incarnation=identity.incarnation,
+        ttl_seconds=lease_ttl_seconds,
+        metadata={
+            "module_id": module_id,
+            "operation_type": operation_type,
+            "durability_mode": "sqlite_caller_transaction",
+        },
+    )
+    if claim is None:
+        raise RecoveryOperationBusy(
+            f"Another runtime owns the recovery fence for {lease_resource_key}"
+        )
+    existing = session.execute(
+        select(RecoveryOperation).where(
+            RecoveryOperation.installation_id == identity.installation_id,
+            RecoveryOperation.module_id == module_id,
+            RecoveryOperation.idempotency_key == idempotency_key,
+        )
+    ).scalar_one_or_none()
+    operation = plan_recovery_operation(
+        session,
+        installation_id=identity.installation_id,
+        module_id=module_id,
+        operation_type=operation_type,
+        idempotency_key=idempotency_key,
+        request=request,
+        recovery_plan=recovery_plan,
+        resource_type=resource_type,
+        resource_id=resource_id,
+        lease_claim=claim,
+        metadata=metadata,
+    )
+    if existing is not None:
+        if operation.status == RecoveryStatus.SUCCEEDED.value:
+            release_lease(session, claim)
+            return DurableRecoveryStart(
+                operation_id=operation.id,
+                status=operation.status,
+                replayed=True,
+                operation=None,
+            )
+        raise RecoveryOperationStateConflict(operation.id, operation.status)
+    prepare_recovery_operation(
+        session,
+        operation,
+        evidence=precondition_evidence,
+        lease_claim=claim,
+    )
+    start_recovery_operation(
+        session,
+        operation,
+        evidence={"lease_resource_key": lease_resource_key},
+        lease_claim=claim,
+    )
+    if not verify_recovery_evidence_chain(session, operation.id):
+        raise RecoveryGuaranteeError(
+            "Recovery checkpoint chain verification failed before side effects"
+        )
+    return DurableRecoveryStart(
+        operation_id=operation.id,
+        status=operation.status,
+        replayed=False,
+        operation=DurableRecoveryOperation(
+            session_factory=session_factory,
+            operation_id=operation.id,
+            lease_claim=claim,
+            lease_ttl_seconds=lease_ttl_seconds,
+        ),
+    )
+
+
+def _blob_write_evidence(effect: PendingBlobWrite) -> dict[str, object]:
+    database_blob_present: bool | None
+    database_matches: bool | None
+    database_integrity_verified: bool | None
+    try:
+        with effect.operation.session_factory() as session:
+            blob = session.get(FileBlob, effect.blob_id)
+            database_blob_present = blob is not None
+            database_matches = bool(
+                blob is not None
+                and blob.tenant_id == effect.tenant_id
+                and blob.storage_key == effect.storage_key
+                and blob.checksum_sha256 == effect.semantic_checksum_sha256
+                and blob.size_bytes == effect.semantic_size_bytes
+                and blob.protection_discriminator
+                == effect.protection_discriminator
+                and blob.encryption_envelope_id == effect.expected_envelope_id
+                and (
+                    effect.expected_storage_checksum_sha256
+                    == (
+                        blob.storage_checksum_sha256
+                        or blob.checksum_sha256
+                    )
+                )
+            ) if blob is not None else False
+            database_integrity_verified = bool(
+                blob is not None
+                and blob.integrity_status == "verified"
+                and blob.quarantined_at is None
+            ) if blob is not None else False
+    except Exception:
+        database_blob_present = None
+        database_matches = None
+        database_integrity_verified = None
+
+    object_present: bool | None
+    observed_size: int | None = None
+    observed_checksum: str | None = None
+    try:
+        digest = hashlib.sha256()
+        observed_size = 0
+        for chunk in effect.backend.iter_bytes(effect.storage_key):
+            observed_size += len(chunk)
+            digest.update(chunk)
+        observed_checksum = digest.hexdigest()
+        object_present = True
+    except StorageObjectMissing:
+        object_present = False
+    except (StorageBackendError, OSError):
+        object_present = None
+
+    object_size_matches = (
+        observed_size == effect.expected_storage_size_bytes
+        if object_present is True and effect.expected_storage_size_bytes is not None
+        else False if object_present is False else None
+    )
+    object_checksum_matches = (
+        observed_checksum == effect.expected_storage_checksum_sha256
+        if object_present is True
+        and effect.expected_storage_checksum_sha256 is not None
+        else False if object_present is False else None
+    )
+    verified = database_blob_present is not None and object_present is not None
+    return {
+        "verified": verified,
+        "checks": {
+            "database_reloaded": database_blob_present is not None,
+            "object_probed": object_present is not None,
+            "database_matches_request": database_matches,
+            "database_integrity_verified": database_integrity_verified,
+            "object_size_matches": object_size_matches,
+            "object_checksum_matches": object_checksum_matches,
+        },
+        "blob_id": effect.blob_id,
+        "database_blob_present": database_blob_present,
+        "database_matches_request": database_matches,
+        "database_integrity_verified": database_integrity_verified,
+        "object_present": object_present,
+        "observed_size_bytes": observed_size,
+        "observed_checksum_sha256": observed_checksum,
+        "expected_storage_size_bytes": effect.expected_storage_size_bytes,
+        "expected_storage_checksum_sha256": effect.expected_storage_checksum_sha256,
+    }
+
+
+def _blob_write_complete(evidence: dict[str, object]) -> bool:
+    return bool(
+        evidence.get("verified") is True
+        and evidence.get("database_matches_request") is True
+        and evidence.get("database_integrity_verified") is True
+        and _object_matches(evidence)
+    )
+
+
+def _object_matches(evidence: dict[str, object]) -> bool:
+    checks = evidence.get("checks")
+    return bool(
+        isinstance(checks, dict)
+        and evidence.get("object_present") is True
+        and checks.get("object_size_matches") is True
+        and checks.get("object_checksum_matches") is True
+    )
+
+
+def _forward_complete_blob_repair(effect: PendingBlobWrite) -> bool:
+    try:
+        with effect.operation.session_factory() as session:
+            blob = session.get(FileBlob, effect.blob_id)
+            if (
+                blob is None
+                or blob.tenant_id != effect.tenant_id
+                or blob.storage_key != effect.storage_key
+                or blob.checksum_sha256 != effect.semantic_checksum_sha256
+                or blob.size_bytes != effect.semantic_size_bytes
+                or blob.protection_discriminator
+                != effect.protection_discriminator
+                or blob.encryption_envelope_id != effect.expected_envelope_id
+            ):
+                return False
+            blob.storage_checksum_sha256 = (
+                effect.expected_storage_checksum_sha256
+                if effect.expected_envelope_id
+                else None
+            )
+            blob.storage_size_bytes = (
+                effect.expected_storage_size_bytes
+                if effect.expected_envelope_id
+                else None
+            )
+            blob.integrity_status = "verified"
+            blob.integrity_checked_at = datetime.now(UTC)
+            blob.integrity_failure = None
+            blob.quarantined_at = None
+            session.add(blob)
+            session.commit()
+            return True
+    except Exception:
+        return False
+
+
+def _quarantine_blob_after_failed_verification(
+    effect: PendingBlobWrite,
+    evidence: dict[str, object],
+) -> None:
+    try:
+        with effect.operation.session_factory() as session:
+            blob = session.get(FileBlob, effect.blob_id)
+            if blob is None or blob.storage_key != effect.storage_key:
+                return
+            blob.integrity_status = (
+                "missing"
+                if evidence.get("object_present") is False
+                else "checksum_mismatch"
+            )
+            blob.integrity_checked_at = datetime.now(UTC)
+            blob.integrity_failure = "recovery_verification_failed"
+            blob.quarantined_at = datetime.now(UTC)
+            session.add(blob)
+            session.commit()
+    except Exception:
+        return
+
+
+def _orphan_cleanup_evidence(effect: PendingOrphanCleanup) -> dict[str, object]:
+    try:
+        object_present: bool | None = effect.backend.exists(effect.storage_key)
+    except (StorageBackendError, OSError):
+        object_present = None
+    finding_present: bool | None
+    finding_deleted: bool | None
+    still_unreferenced: bool | None
+    try:
+        with effect.operation.session_factory() as session:
+            finding = session.get(FileIntegrityFinding, effect.finding_id)
+            finding_present = finding is not None
+            finding_deleted = bool(
+                finding is not None and finding.state == "deleted"
+            ) if finding is not None else False
+            referenced = (
+                session.query(FileBlob.id)
+                .filter(
+                    FileBlob.tenant_id == effect.tenant_id,
+                    FileBlob.storage_key == effect.storage_key,
+                )
+                .first()
+            )
+            still_unreferenced = referenced is None
+    except Exception:
+        finding_present = None
+        finding_deleted = None
+        still_unreferenced = None
+    verified = object_present is not None and finding_present is not None
+    return {
+        "verified": verified,
+        "checks": {
+            "database_reloaded": finding_present is not None,
+            "object_probed": object_present is not None,
+            "finding_marked_deleted": finding_deleted,
+            "object_absent": (
+                not object_present if object_present is not None else None
+            ),
+            "still_unreferenced": still_unreferenced,
+        },
+        "finding_id": effect.finding_id,
+        "finding_present": finding_present,
+        "finding_deleted": finding_deleted,
+        "object_present": object_present,
+        "still_unreferenced": still_unreferenced,
+    }
+
+
+def _orphan_cleanup_complete(evidence: dict[str, object]) -> bool:
+    return bool(
+        evidence.get("verified") is True
+        and evidence.get("finding_deleted") is True
+        and evidence.get("object_present") is False
+        and evidence.get("still_unreferenced") is True
+    )
+
+
+def _forward_complete_orphan_finding(effect: PendingOrphanCleanup) -> bool:
+    try:
+        with effect.operation.session_factory() as session:
+            finding = session.get(FileIntegrityFinding, effect.finding_id)
+            if (
+                finding is None
+                or finding.tenant_id != effect.tenant_id
+                or finding.storage_key != effect.storage_key
+            ):
+                return False
+            scan = session.get(FileIntegrityScan, finding.scan_id)
+            if scan is None or not finding.storage_key.startswith(
+                scan.storage_prefix
+            ):
+                return False
+            referenced = (
+                session.query(FileBlob.id)
+                .filter(
+                    FileBlob.tenant_id == effect.tenant_id,
+                    FileBlob.storage_key == effect.storage_key,
+                )
+                .first()
+            )
+            if referenced:
+                return False
+            finding.state = "deleted"
+            finding.resolved_at = datetime.now(UTC)
+            finding.resolved_by_user_id = effect.resolved_by_user_id
+            session.add(finding)
+            session.commit()
+            return True
+    except Exception:
+        return False
+
+
+__all__ = [
+    "PendingBlobWrite",
+    "PendingOrphanCleanup",
+    "begin_blob_write_recovery",
+    "begin_orphan_cleanup_recovery",
+]

src/govoplan_files/backend/storage/sdk_peer_pinning.py

@@ -0,0 +1,331 @@
+from __future__ import annotations
+
+import inspect
+import socket
+import threading
+from functools import lru_cache
+from importlib import import_module
+from typing import Any
+
+from govoplan_core.security.outbound_http import (
+    OutboundHttpError,
+    create_outbound_connection,
+)
+
+
+class SdkPeerPinningError(RuntimeError):
+    """Raised when an optional SDK cannot be bound to the pinned transport."""
+
+
+_BOTOCORE_CLIENT_CREATION_LOCK = threading.Lock()
+
+
+def create_pinned_s3_client(**kwargs: Any) -> Any:
+    """Construct an S3 client whose first and every later socket is pinned.
+
+    Botocore does not expose the HTTP-session class through boto3's public
+    client API. Its endpoint creator does expose that seam, so this function
+    replaces the creator only for the bounded client-construction operation.
+    The lock avoids an unsafe interleaving with another GovOPlaN client
+    construction. Any unrelated botocore client created during the short
+    replacement window also receives the stricter transport.
+    """
+
+    try:
+        boto3 = import_module("boto3")
+        botocore_args = import_module("botocore.args")
+    except ImportError as exc:
+        raise SdkPeerPinningError(
+            "S3 connector browsing requires the optional boto3 dependency"
+        ) from exc
+
+    pinned_session_cls = _botocore_transport_types()[0]
+    original_creator = getattr(botocore_args, "EndpointCreator", None)
+    if original_creator is None or not hasattr(original_creator, "create_endpoint"):
+        raise SdkPeerPinningError(
+            "The installed botocore release does not expose the endpoint transport seam required for peer pinning"
+        )
+
+    class PinnedEndpointCreator(original_creator):  # type: ignore[misc, valid-type]
+        def create_endpoint(self, *args: Any, **endpoint_kwargs: Any) -> Any:
+            endpoint_kwargs["http_session_cls"] = pinned_session_cls
+            return super().create_endpoint(*args, **endpoint_kwargs)
+
+    with _BOTOCORE_CLIENT_CREATION_LOCK:
+        current_creator = getattr(botocore_args, "EndpointCreator", None)
+        if current_creator is not original_creator:
+            raise SdkPeerPinningError(
+                "Botocore endpoint construction changed concurrently; refusing to create an unproven S3 client"
+            )
+        botocore_args.EndpointCreator = PinnedEndpointCreator
+        try:
+            session_type = getattr(getattr(boto3, "session", None), "Session", None)
+            if session_type is None:
+                raise SdkPeerPinningError(
+                    "The installed boto3 release does not expose its isolated session constructor"
+                )
+            client = session_type().client("s3", **kwargs)
+        finally:
+            if getattr(botocore_args, "EndpointCreator", None) is PinnedEndpointCreator:
+                botocore_args.EndpointCreator = original_creator
+
+    http_session = getattr(getattr(client, "_endpoint", None), "http_session", None)
+    if http_session is None or not isinstance(http_session, pinned_session_cls):
+        close = getattr(client, "close", None)
+        if callable(close):
+            close()
+        raise SdkPeerPinningError(
+            "Botocore did not install the required pinned HTTP transport; the S3 client was discarded"
+        )
+    return client
+
+
+@lru_cache(maxsize=1)
+def _botocore_transport_types() -> tuple[type[Any], type[Any], type[Any]]:
+    try:
+        awsrequest = import_module("botocore.awsrequest")
+        httpsession = import_module("botocore.httpsession")
+        urllib3_exceptions = import_module("urllib3.exceptions")
+    except ImportError as exc:
+        raise SdkPeerPinningError(
+            "S3 connector browsing requires a compatible botocore HTTP transport"
+        ) from exc
+
+    required = (
+        "AWSHTTPConnection",
+        "AWSHTTPSConnection",
+        "AWSHTTPConnectionPool",
+        "AWSHTTPSConnectionPool",
+    )
+    if any(not hasattr(awsrequest, name) for name in required) or not hasattr(
+        httpsession, "URLLib3Session"
+    ):
+        raise SdkPeerPinningError(
+            "The installed botocore release is missing the connection classes required for peer pinning"
+        )
+
+    def pinned_new_connection(connection: Any) -> socket.socket:
+        hostname = str(getattr(connection, "_dns_host", "") or "").strip()
+        port = int(getattr(connection, "port", 0) or 0)
+        if not hostname or not port:
+            raise urllib3_exceptions.NewConnectionError(
+                connection, "Pinned S3 connection is missing its target authority"
+            )
+        try:
+            return create_outbound_connection(
+                hostname,
+                port,
+                timeout=getattr(connection, "timeout", None),
+                source_address=getattr(connection, "source_address", None),
+                socket_options=getattr(connection, "socket_options", None),
+                label="S3 connector peer",
+            )
+        except socket.timeout as exc:
+            raise urllib3_exceptions.ConnectTimeoutError(
+                connection,
+                f"Connection to {hostname} timed out while selecting an approved peer",
+            ) from exc
+        except (OSError, OutboundHttpError, ValueError) as exc:
+            raise urllib3_exceptions.NewConnectionError(
+                connection,
+                f"S3 connector peer was rejected: {exc}",
+            ) from exc
+
+    class PinnedAWSHTTPConnection(awsrequest.AWSHTTPConnection):
+        _new_conn = pinned_new_connection
+
+    class PinnedAWSHTTPSConnection(awsrequest.AWSHTTPSConnection):
+        _new_conn = pinned_new_connection
+
+    class PinnedAWSHTTPConnectionPool(awsrequest.AWSHTTPConnectionPool):
+        ConnectionCls = PinnedAWSHTTPConnection
+
+    class PinnedAWSHTTPSConnectionPool(awsrequest.AWSHTTPSConnectionPool):
+        ConnectionCls = PinnedAWSHTTPSConnection
+
+    class PinnedURLLib3Session(httpsession.URLLib3Session):
+        def __init__(self, *args: Any, **kwargs: Any) -> None:
+            # A proxy would select the final target outside this process. Until
+            # proxy peer delegation is modeled, connector traffic is direct.
+            kwargs["proxies"] = {}
+            super().__init__(*args, **kwargs)
+            self._pool_classes_by_scheme = {
+                "http": PinnedAWSHTTPConnectionPool,
+                "https": PinnedAWSHTTPSConnectionPool,
+            }
+            manager = getattr(self, "_manager", None)
+            if manager is None or not hasattr(manager, "pool_classes_by_scheme"):
+                raise SdkPeerPinningError(
+                    "The installed botocore pool manager cannot enforce pinned connection classes"
+                )
+            manager.pool_classes_by_scheme = self._pool_classes_by_scheme
+
+    return PinnedURLLib3Session, PinnedAWSHTTPConnection, PinnedAWSHTTPSConnection
+
+
+@lru_cache(maxsize=1)
+def pinned_smb_connection_cache() -> dict[str, Any]:
+    """Return the Files-owned cache; unproven process-global sessions are never reused."""
+
+    return {}
+
+
+def install_pinned_smb_transport(smbclient: Any) -> Any:
+    """Install a process-wide fail-closed smbclient session factory.
+
+    smbclient routes initial connections, reconnects, and DFS targets through
+    ``smbclient._pool.register_session``. Replacing that single factory with a
+    behavior-compatible implementation ensures every target uses a socket
+    selected by Core's deployment-wide outbound policy.
+    """
+
+    try:
+        pool = import_module("smbclient._pool")
+        connection_module = import_module("smbprotocol.connection")
+        session_module = import_module("smbprotocol.session")
+        transport_module = import_module("smbprotocol.transport")
+    except ImportError as exc:
+        raise SdkPeerPinningError(
+            "SMB connector browsing requires the optional smbprotocol dependency"
+        ) from exc
+
+    current = getattr(pool, "register_session", None)
+    if getattr(current, "__govoplan_peer_pinned__", False):
+        expected_tcp = getattr(current, "__govoplan_pinned_tcp__", None)
+        if expected_tcp is None or getattr(connection_module, "Tcp", None) is not expected_tcp:
+            raise SdkPeerPinningError(
+                "The installed SMB transport changed after peer pinning; refusing to reuse the session factory"
+            )
+        return smbclient
+    required_parameters = {
+        "server",
+        "username",
+        "password",
+        "port",
+        "encrypt",
+        "connection_timeout",
+        "connection_cache",
+        "auth_protocol",
+        "require_signing",
+    }
+    if current is None or not required_parameters.issubset(
+        inspect.signature(current).parameters
+    ):
+        raise SdkPeerPinningError(
+            "The installed smbprotocol release does not expose the session seam required for peer pinning"
+        )
+
+    class PinnedTcp(transport_module.Tcp):
+        def connect(self) -> None:
+            with self._sock_lock:
+                if self.connected:
+                    return
+                try:
+                    self._sock = create_outbound_connection(
+                        self.server,
+                        int(self.port),
+                        timeout=self.timeout,
+                        label="SMB connector peer",
+                    )
+                except (OSError, OutboundHttpError, ValueError) as exc:
+                    raise ValueError(
+                        f"SMB connector peer '{self.server}:{self.port}' was rejected: {exc}"
+                    ) from exc
+                self._sock.settimeout(None)
+                self.connected = True
+
+    # Connection.connect() instantiates the module-level Tcp symbol on every
+    # reconnect. Replacing it process-wide is deliberate: an SMB connection
+    # created by another code path must become stricter, never bypass Files'
+    # peer boundary.
+    if not hasattr(connection_module, "Tcp"):
+        raise SdkPeerPinningError(
+            "The installed smbprotocol release cannot install the pinned TCP transport"
+        )
+    connection_module.Tcp = PinnedTcp
+
+    def pinned_register_session(
+        server: str,
+        username: str | None = None,
+        password: str | None = None,
+        port: int = 445,
+        encrypt: bool | None = None,
+        connection_timeout: float = 60,
+        connection_cache: dict[str, Any] | None = None,
+        auth_protocol: str = "negotiate",
+        require_signing: bool = True,
+    ) -> Any:
+        cache = pinned_smb_connection_cache() if connection_cache is None else connection_cache
+        connection_key = f"{server.lower()}:{port}"
+        connection = cache.get(connection_key)
+        transport = getattr(connection, "transport", None)
+        if connection is not None and not isinstance(transport, PinnedTcp):
+            disconnect = getattr(connection, "disconnect", None)
+            if callable(disconnect):
+                try:
+                    disconnect(close=True)
+                except Exception:
+                    pass
+            cache.pop(connection_key, None)
+            connection = None
+        if connection is None or not getattr(connection.transport, "connected", False):
+            connection = connection_module.Connection(
+                pool.ClientConfig().client_guid,
+                server,
+                port,
+                require_signing=require_signing,
+            )
+            connection.transport = PinnedTcp(server, port)
+            connection.connect(timeout=connection_timeout)
+            if not isinstance(connection.transport, PinnedTcp):
+                disconnect = getattr(connection, "disconnect", None)
+                if callable(disconnect):
+                    try:
+                        disconnect(close=True)
+                    except Exception:
+                        pass
+                raise SdkPeerPinningError(
+                    "smbprotocol replaced the required pinned TCP transport during connection setup"
+                )
+            cache[connection_key] = connection
+
+        session = next(
+            (
+                item
+                for item in connection.session_table.values()
+                if username is None or item.username == username
+            ),
+            None,
+        )
+        if session is None:
+            session = session_module.Session(
+                connection,
+                username=username,
+                password=password,
+                require_encryption=(encrypt is True),
+                auth_protocol=auth_protocol,
+            )
+            session.connect()
+        elif encrypt is not None:
+            if session.encrypt_data and not encrypt:
+                raise ValueError(
+                    "Cannot disable encryption on an already negotiated session."
+                )
+            if not session.encrypt_data and encrypt:
+                session.encrypt = True
+        return session
+
+    pinned_register_session.__govoplan_peer_pinned__ = True  # type: ignore[attr-defined]
+    pinned_register_session.__govoplan_pinned_tcp__ = PinnedTcp  # type: ignore[attr-defined]
+    pool.register_session = pinned_register_session
+    if hasattr(smbclient, "register_session"):
+        smbclient.register_session = pinned_register_session
+    return smbclient
+
+
+__all__ = [
+    "SdkPeerPinningError",
+    "create_pinned_s3_client",
+    "install_pinned_smb_transport",
+    "pinned_smb_connection_cache",
+]