Release v0.1.15

.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

@@ -0,0 +1,348 @@
+# ---> Node
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# vitepress build output
+**/.vitepress/dist
+
+# vitepress cache directory
+**/.vitepress/cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+# 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/
+
+# ---> Python
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# UV
+#   Similar to Pipfile.lock, it is generally recommended to include uv.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#uv.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/latest/usage/project/#working-with-version-control
+.pdm.toml
+.pdm-python
+.pdm-build/
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+# Ruff stuff:
+.ruff_cache/
+
+# PyPI configuration file
+.pypirc
+
+# ---> VisualStudioCode
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix
+
+*.db
+
+# GovOPlaN local runtime state
+runtime/
+
+# GovOPlaN WebUI test output
+webui/.module-test-build/
+webui/.component-test-build/

AGENTS.md

@@ -0,0 +1,24 @@
+# GovOPlaN Forms Codex Guide
+
+## Scope
+
+This repository owns immutable reusable form definitions and their designer.
+Runtime values, drafts, receipts, attachments, signatures, and handoffs belong
+to `govoplan-forms-runtime` or the corresponding domain owner.
+
+## Working Rules
+
+- Resolve cross-module behavior through Core contracts and capabilities; do not
+  import another optional module's tables or WebUI pages.
+- Keep definition revisions immutable and tenant-bound. Schema changes create a
+  new revision and use optimistic concurrency.
+- Keep submitted values out of Forms events, logs, and definition storage.
+- Every behavior or UI change must update the relevant user/admin documentation
+  and architecture declaration in the same change.
+
+## Verification
+
+```bash
+PYTHONPATH=src:/mnt/DATA/git/govoplan-core/src \
+  /mnt/DATA/git/govoplan/.venv/bin/python -m unittest discover -s tests
+```

README.md

@@ -0,0 +1,41 @@
+# GovOPlaN Forms
+
+<!-- govoplan-repository-type:start -->
+**Repository type:** module (domain).
+<!-- govoplan-repository-type:end -->
+
+`govoplan-forms` owns reusable, immutable form definitions, validation rules,
+and form package fragments. Submission runtime behavior remains in
+`govoplan-forms-runtime`.
+
+The module persists exact tenant-bound revisions, exposes bounded catalogue,
+history, and write APIs, and provides `forms.definitions` for consumers. A
+published revision can be used by Forms Runtime without importing Forms tables;
+existing submissions keep their exact revision when a new schema is published.
+
+The `/forms` designer uses shared application controls to create, revise,
+publish, retire, search, and inspect definitions. It edits field order, types,
+choices, validation constraints, draft behavior, attachment and signature
+requirements, policy references, and permitted handoff kinds. Saving always
+creates an exact immutable revision; it never mutates a published schema in
+place.
+
+The designer also supports multi-page/section layout, bounded conditional
+visibility expressions, localized labels/help/options/page titles, fallback
+locale, and accessibility metadata. Server validation rejects unknown fields,
+incompatible operators, placement errors, and condition cycles. Verified
+configuration-package fragments can be assessed and imported as a new local
+draft with source provenance rather than silently becoming active.
+
+Definition writes use optimistic concurrency. Replaying the same object and
+revision is safe only when the payload is identical. Published definitions may
+be retired but not silently returned to draft.
+
+Focused verification:
+
+```bash
+PYTHONPATH=src:/mnt/DATA/git/govoplan-core/src \
+  /mnt/DATA/git/govoplan/.venv/bin/python -m unittest discover -s tests
+```
+
+See [docs/FORMS_BOUNDARY.md](docs/FORMS_BOUNDARY.md) for the boundary decision.

docs/FORMS_BOUNDARY.md

@@ -0,0 +1,89 @@
+# Forms Module Boundary
+
+`govoplan-forms` owns reusable form definitions and validation metadata.
+Runtime submissions and workflow handoff are separate behavior.
+
+The core boundary decision register is in
+`/mnt/DATA/git/govoplan-core/docs/MODULE_ARCHITECTURE.md`.
+
+## Ownership
+
+Forms owns:
+
+- form definitions, field schemas, sections, validation rules, and visibility
+  rules
+- localization, accessibility metadata, versioning, draft/published lifecycle,
+  and admin editing
+- form import/export and configuration-package fragments
+- schema contracts that let portal, workflow, cases, and reporting understand a
+  form without importing form internals
+
+`govoplan-forms-runtime` owns:
+
+- public/internal submission sessions, drafts, receipts, submitted values,
+  validation evidence, attachment references, and submission status
+- submission handoff events to workflow, cases, tasks, mail, reporting, files,
+  DMS, or portal
+
+## Boundaries
+
+Forms does not own:
+
+- public portal identity and anonymous/authenticated public entry points
+- file storage and file permissions for uploaded attachments
+- cases, workflow transitions, tasks, or assignment state
+- DMS document lifecycle and generated record storage
+- reporting aggregation or dataflow transformation
+
+## Submission Status Model
+
+Candidate runtime statuses:
+
+- `draft`
+- `submitted`
+- `validated`
+- `needs_review`
+- `accepted`
+- `rejected`
+- `handed_off`
+- `archived`
+
+The definition module can declare valid transitions and required evidence, but
+runtime state belongs to the runtime module.
+
+## Accessibility And Validation Requirements
+
+Form definitions should carry:
+
+- labels, descriptions, required markers, and help text
+- machine-readable validation rules
+- field grouping and ordering
+- keyboard and screen-reader metadata where needed
+- localization keys and fallback text
+- data classification for privacy/retention decisions
+
+## Capabilities
+
+- `forms.definitions` resolves an exact, tenant-bound immutable definition.
+- The API provides bounded catalogue and history reads plus OCC-guarded writes.
+- The designer provides explicit revision, publication, field-order, type,
+  option, constraint, draft, attachment, signature, policy, and handoff editing.
+- Forms Runtime performs value validation against the resolved definition; the
+  definition owner does not persist submissions.
+
+## Recovery And Operations
+
+Definition revisions are append-only. Recovery restores the database and then
+verifies that every runtime submission's `form_id` and `form_revision` resolves
+to the same payload. Destructive module retirement requires a verified database
+snapshot and is blocked while definition rows remain. The transactional event
+boundary emits only schema identity, revision, publication state, and field
+count; field content remains in the owning database.
+
+The schema vocabulary covers scalar, choice, structured, attachment, signature,
+policy-reference, and handoff constraints. Conditional page/section layout,
+cycle-safe predicates, localization authoring, accessibility assessment, and
+verified package-fragment assessment/import are implemented. Remaining depth is
+concrete attachment/signature providers, richer authoring ergonomics, public
+identity profiles, and target-produced accessibility evidence; those do not
+change the runtime boundary.

docs/INTERFACE_PATTERN_MIGRATION.md

@@ -0,0 +1,33 @@
+# Forms Interface Pattern Migration
+
+This migration applies the GovOPlaN interface pattern language to the
+Forms-owned definition catalogue, package import, and revision editor. Forms
+owns immutable reusable schemas; Forms Runtime continues to own values,
+submissions, receipts, and handoff execution.
+
+## Surface Inventory
+
+| Surface | Archetype | Consequence class | Contract |
+| --- | --- | --- | --- |
+| `/forms` catalogue | Searchable definition library | Filter, export, import, create, or revise | Shared loading/error/empty/permission/help states and stable row actions |
+| Package import dialog | Consequential package review | Create local draft from external provenance | Assessment, required reason, guarded draft, never implicit publish |
+| Definition dialog | Versioned definition editor | Create immutable revision | Guarded editor, contextual schema help, explained validation and permission states |
+| Publication state | Governed lifecycle selector | Publish or retire exact revision | Admin-only availability and explicit lifecycle confirmation |
+| Field/page/localization editors | Structured schema composition | Change future runtime schema | At least one field, stable ordering, preview, localization and accessibility metadata |
+
+## Consequence And Availability Rules
+
+- Every save creates an immutable revision with a reason. Runtime instances
+  retain the exact revision with which they were created.
+- Publishing permits future authorized use. Retirement prevents future use but
+  does not erase definitions, submissions, receipts, or evidence.
+- Imported packages become local drafts and retain source provenance.
+- Missing write or administration authority remains visible with an Access
+  destination; retired definitions show a lifecycle explanation.
+- Optional Runtime, Portal, Workflow, Case, and Policy behavior remains behind
+  declared interfaces and capabilities.
+
+The module uses shared controls, dialogs, blockers, field help, statuses,
+loading, empty/error states, disabled reasons, confirmations, and unsaved-draft
+guards. Existing responsive list/editor layouts remain bounded. English and
+German catalogues cover the owned route and editor vocabulary.

pyproject.toml

@@ -0,0 +1,21 @@
+[build-system]
+requires = ["setuptools>=69", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "govoplan-forms"
+version = "0.1.15"
+description = "Immutable reusable form definitions for GovOPlaN."
+readme = "README.md"
+requires-python = ">=3.12"
+authors = [{ name = "GovOPlaN" }]
+dependencies = ["govoplan-core>=0.1.15", "govoplan-access>=0.1.15"]
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+[tool.setuptools.package-data]
+govoplan_forms = ["py.typed"]
+
+[project.entry-points."govoplan.modules"]
+"forms" = "govoplan_forms.backend.manifest:get_manifest"

src/govoplan_forms/__init__.py

@@ -0,0 +1,3 @@
+"""GovOPlaN Forms module."""
+
+__version__ = "0.1.15"

src/govoplan_forms/backend/__init__.py

@@ -0,0 +1 @@
+"""Forms backend package."""

src/govoplan_forms/backend/db/__init__.py

@@ -0,0 +1 @@
+"""Forms database models."""

src/govoplan_forms/backend/db/models.py

@@ -0,0 +1,65 @@
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Any
+import uuid
+
+from sqlalchemy import DateTime, Index, JSON, String, Text, UniqueConstraint
+from sqlalchemy.orm import Mapped, mapped_column
+
+from govoplan_core.db.base import Base, TimestampMixin
+
+
+def new_uuid() -> str:
+    return str(uuid.uuid4())
+
+
+class FormDefinitionRevision(Base, TimestampMixin):
+    __tablename__ = "form_definition_revisions"
+    __table_args__ = (
+        UniqueConstraint(
+            "tenant_id",
+            "form_id",
+            "revision",
+            name="uq_form_definition_revision",
+        ),
+        Index(
+            "ix_form_definition_current",
+            "tenant_id",
+            "form_id",
+            "superseded_at",
+        ),
+        Index(
+            "ix_form_definition_catalog",
+            "tenant_id",
+            "publication_state",
+            "form_key",
+        ),
+    )
+
+    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_id: Mapped[str] = mapped_column(String(255), nullable=False, index=True)
+    form_key: Mapped[str] = mapped_column(String(255), nullable=False, index=True)
+    revision: Mapped[str] = mapped_column(String(255), nullable=False, index=True)
+    previous_revision_id: Mapped[str | None] = mapped_column(
+        String(36), nullable=True, index=True
+    )
+    publication_state: Mapped[str] = mapped_column(
+        String(30), nullable=False, index=True
+    )
+    title: Mapped[str] = mapped_column(String(500), nullable=False)
+    recorded_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False, index=True
+    )
+    superseded_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True, index=True
+    )
+    search_text: Mapped[str] = mapped_column(Text, nullable=False)
+    payload: Mapped[dict[str, Any]] = mapped_column(JSON, nullable=False)
+    changed_by: Mapped[str | None] = mapped_column(
+        String(255), nullable=True, index=True
+    )
+
+
+__all__ = ["FormDefinitionRevision"]

src/govoplan_forms/backend/manifest.py

@@ -0,0 +1,297 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from govoplan_core.core.access import (
+    CAPABILITY_AUTH_PERMISSION_EVALUATOR,
+    CAPABILITY_AUTH_PRINCIPAL_RESOLVER,
+)
+from govoplan_core.core.institutional import CAPABILITY_FORM_DEFINITIONS
+from govoplan_core.core.module_guards import (
+    drop_table_retirement_provider,
+    persistent_table_uninstall_guard,
+)
+from govoplan_core.core.modules import (
+    CapabilityDocumentation,
+    DocumentationLink,
+    DocumentationTopic,
+    FrontendModule,
+    FrontendRoute,
+    MigrationSpec,
+    ModuleContext,
+    ModuleInterfaceProvider,
+    ModuleManifest,
+    NavItem,
+    PermissionDefinition,
+    RoleTemplate,
+)
+from govoplan_core.core.provider_governance import declared_module_architecture
+from govoplan_core.core.views import ViewSurface
+from govoplan_core.db.base import Base
+from govoplan_forms.backend.db import models as form_models
+from govoplan_forms.backend.service import SqlFormDefinitionProvider
+
+
+MODULE_ID = "forms"
+MODULE_NAME = "Forms"
+MODULE_VERSION = "0.1.15"
+READ_SCOPE = "forms:definition:read"
+WRITE_SCOPE = "forms:definition:write"
+ADMIN_SCOPE = "forms:definition:admin"
+OPTIONAL_DEPENDENCIES = (
+    "forms_runtime",
+    "portal",
+    "workflow_engine",
+    "cases",
+    "policy",
+)
+
+
+def _permission(scope: str, label: str, description: str) -> PermissionDefinition:
+    module_id, resource, action = scope.split(":", 2)
+    return PermissionDefinition(
+        scope=scope,
+        label=label,
+        description=description,
+        category=MODULE_NAME,
+        level="tenant",
+        module_id=module_id,
+        resource=resource,
+        action=action,
+    )
+
+
+def _router(_context: ModuleContext):
+    from govoplan_forms.backend.router import router
+
+    return router
+
+
+def _definitions(_context: ModuleContext) -> SqlFormDefinitionProvider:
+    return SqlFormDefinitionProvider()
+
+
+manifest = ModuleManifest(
+    id=MODULE_ID,
+    name=MODULE_NAME,
+    version=MODULE_VERSION,
+    dependencies=("access",),
+    optional_dependencies=OPTIONAL_DEPENDENCIES,
+    required_capabilities=(
+        CAPABILITY_AUTH_PRINCIPAL_RESOLVER,
+        CAPABILITY_AUTH_PERMISSION_EVALUATOR,
+    ),
+    provides_interfaces=(
+        ModuleInterfaceProvider(name="forms.definitions", version="0.1.0"),
+    ),
+    permissions=(
+        _permission(
+            READ_SCOPE,
+            "View form definitions",
+            "Read reusable form definitions and exact revisions.",
+        ),
+        _permission(
+            WRITE_SCOPE,
+            "Manage form definitions",
+            "Create and revise reusable form definitions.",
+        ),
+        _permission(
+            ADMIN_SCOPE,
+            "Publish form definitions",
+            "Publish and retire form-definition revisions.",
+        ),
+    ),
+    role_templates=(
+        RoleTemplate(
+            slug="forms_designer",
+            name="Forms designer",
+            description="Design and publish reusable form definitions.",
+            permissions=(READ_SCOPE, WRITE_SCOPE, ADMIN_SCOPE),
+        ),
+        RoleTemplate(
+            slug="forms_reader",
+            name="Forms reader",
+            description="Inspect reusable form definitions.",
+            permissions=(READ_SCOPE,),
+        ),
+    ),
+    route_factory=_router,
+    nav_items=(
+        NavItem(
+            path="/forms",
+            label="Form definitions",
+            icon="list-tree",
+            required_any=(READ_SCOPE,),
+            order=36,
+        ),
+    ),
+    frontend=FrontendModule(
+        module_id=MODULE_ID,
+        package_name="@govoplan/forms-webui",
+        routes=(
+            FrontendRoute(
+                path="/forms",
+                component="FormsPage",
+                required_any=(READ_SCOPE,),
+                order=36,
+            ),
+        ),
+        nav_items=(
+            NavItem(
+                path="/forms",
+                label="Form definitions",
+                icon="list-tree",
+                required_any=(READ_SCOPE,),
+                order=36,
+            ),
+        ),
+        view_surfaces=(
+            ViewSurface(
+                id="forms.navigation",
+                module_id=MODULE_ID,
+                kind="navigation",
+                label="Form definitions navigation",
+                order=10,
+            ),
+            ViewSurface(
+                id="forms.catalogue",
+                module_id=MODULE_ID,
+                kind="route",
+                label="Form definition catalogue",
+                order=20,
+            ),
+        ),
+    ),
+    capability_factories={CAPABILITY_FORM_DEFINITIONS: _definitions},
+    capability_documentation={
+        CAPABILITY_FORM_DEFINITIONS: CapabilityDocumentation(
+            label="Immutable form definitions",
+            summary="Resolves exact tenant-bound form schemas without exposing Forms tables.",
+            contract_version="0.1.0",
+        )
+    },
+    migration_spec=MigrationSpec(
+        module_id=MODULE_ID,
+        metadata=Base.metadata,
+        script_location=str(Path(__file__).with_name("migrations") / "versions"),
+        retirement_supported=True,
+        retirement_provider=drop_table_retirement_provider(
+            form_models.FormDefinitionRevision,
+            label=MODULE_NAME,
+        ),
+        retirement_notes="Destructive retirement removes immutable form-definition history and requires a database snapshot.",
+    ),
+    uninstall_guard_providers=(
+        persistent_table_uninstall_guard(
+            form_models.FormDefinitionRevision,
+            label=MODULE_NAME,
+        ),
+    ),
+    documentation=(
+        DocumentationTopic(
+            id="forms.definitions",
+            title="Reusable form definitions",
+            summary="Create immutable, versioned schemas consumed by Forms Runtime and institutional services.",
+            body=(
+                "Each revision fixes field types, options, constraints, draft, attachment, signature, policy, and handoff requirements. "
+                "Publishing is explicit; existing submissions continue to retain their exact revision."
+            ),
+            layer="configured",
+            documentation_types=("admin", "user"),
+            audience=("user", "operator", "module_admin", "product_owner"),
+            links=(
+                DocumentationLink(
+                    label="Forms boundary and recovery",
+                    href="govoplan-forms/docs/FORMS_BOUNDARY.md",
+                    kind="repository",
+                ),
+            ),
+            metadata={
+                "seed": True,
+                "help_contexts": [
+                    "forms.navigation",
+                    "forms.catalogue",
+                    "forms.state.permission-blocked",
+                    "forms.state.empty",
+                ],
+                "privacy_notes": [
+                    "Definition catalogues contain schemas and policy references, not submitted Form values.",
+                    "Package assessment does not grant access to referenced runtime submissions or external providers.",
+                    "Published accessibility and localization content is visible wherever the exact definition is authorized.",
+                ],
+            },
+        ),
+        DocumentationTopic(
+            id="forms.reference.fields-and-consequences",
+            title="Form definition fields and lifecycle consequences",
+            summary="Schema, publication, localization, policy, evidence, package, and handoff semantics for immutable Form revisions.",
+            body=(
+                "The stable key identifies the definition while each save creates a new immutable revision. Field keys, types, "
+                "constraints, visibility conditions, pages, sections, options, help, localization, and accessibility instructions "
+                "become the exact runtime schema. Attachment, signature, policy, draft, and permitted-handoff settings are enforced "
+                "by Forms Runtime when that module is present. Publishing makes a revision available for new instances; existing "
+                "instances retain their prior exact revision. Retirement prevents future use without deleting definitions or submissions. "
+                "Package import always creates a local draft and retains source provenance; it never silently publishes an imported revision."
+            ),
+            layer="configured",
+            documentation_types=("admin", "user"),
+            audience=("user", "operator", "module_admin", "auditor"),
+            related_modules=OPTIONAL_DEPENDENCIES,
+            links=(
+                DocumentationLink(
+                    label="Forms boundary and recovery",
+                    href="govoplan-forms/docs/FORMS_BOUNDARY.md",
+                    kind="repository",
+                ),
+            ),
+            metadata={
+                "seed": True,
+                "help_contexts": [
+                    "forms.field.publication-state",
+                    "forms.field.signature-requirement",
+                    "forms.field.policy-references",
+                    "forms.field.handoff-kinds",
+                    "forms.field.accessibility",
+                    "forms.field.change-reason",
+                    "forms.action.save-revision",
+                    "forms.action.publish",
+                    "forms.action.retire",
+                    "forms.action.import-package",
+                ],
+                "consequence_classes": {
+                    "save_revision": "Creates an immutable definition revision with a change reason.",
+                    "publish": "Makes the exact revision available for future authorized instances.",
+                    "retire": "Stops future use while retaining definitions and exact runtime references.",
+                    "import_package": "Creates a local draft and retains package provenance without automatic publication.",
+                },
+            },
+        ),
+    ),
+    architecture=declared_module_architecture(
+        layer="human_work_procedure",
+        kind="domain",
+        maturity="vertical_slice",
+        documentation_ref="docs/FORMS_BOUNDARY.md",
+        test_ref="tests/test_forms.py",
+        known_limits=(
+            "Concrete attachment/signature providers, anonymous identity profiles, richer authoring ergonomics, and target-produced accessibility evidence remain product depth.",
+        ),
+        supported_authority_modes=("native_authoritative",),
+        owned_concepts=("form definition", "form schema", "form definition revision"),
+        non_owned_concepts=(
+            "form submission",
+            "file content",
+            "case",
+            "workflow instance",
+        ),
+        reference_packages=("product.service-to-decision",),
+        migration_docs=("docs/FORMS_BOUNDARY.md",),
+        recovery_docs=("docs/FORMS_BOUNDARY.md",),
+        security_docs=("docs/FORMS_BOUNDARY.md",),
+        operations_docs=("docs/FORMS_BOUNDARY.md",),
+    ),
+)
+
+
+def get_manifest() -> ModuleManifest:
+    return manifest

src/govoplan_forms/backend/migrations/__init__.py

@@ -0,0 +1 @@
+"""Forms Alembic revisions."""

src/govoplan_forms/backend/migrations/versions/__init__.py

@@ -0,0 +1 @@
+"""Forms migration versions."""

src/govoplan_forms/backend/migrations/versions/e1f2a3b4c5d6_v0114_forms_definitions.py

@@ -0,0 +1,77 @@
+"""v0.1.14 immutable Forms definitions.
+
+Revision ID: e1f2a3b4c5d6
+Revises: None
+"""
+
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "e1f2a3b4c5d6"
+down_revision = None
+branch_labels = None
+depends_on = "4f2a9c8e7b6d"
+
+
+def upgrade() -> None:
+    op.create_table(
+        "form_definition_revisions",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("form_id", sa.String(length=255), nullable=False),
+        sa.Column("form_key", sa.String(length=255), nullable=False),
+        sa.Column("revision", sa.String(length=255), nullable=False),
+        sa.Column("previous_revision_id", sa.String(length=36), nullable=True),
+        sa.Column("publication_state", sa.String(length=30), nullable=False),
+        sa.Column("title", sa.String(length=500), nullable=False),
+        sa.Column("recorded_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("superseded_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("search_text", sa.Text(), nullable=False),
+        sa.Column("payload", sa.JSON(), nullable=False),
+        sa.Column("changed_by", 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.PrimaryKeyConstraint("id", name=op.f("pk_form_definition_revisions")),
+        sa.UniqueConstraint(
+            "tenant_id",
+            "form_id",
+            "revision",
+            name="uq_form_definition_revision",
+        ),
+    )
+    for column in (
+        "tenant_id",
+        "form_id",
+        "form_key",
+        "revision",
+        "previous_revision_id",
+        "publication_state",
+        "recorded_at",
+        "superseded_at",
+        "changed_by",
+    ):
+        op.create_index(
+            op.f(f"ix_form_definition_revisions_{column}"),
+            "form_definition_revisions",
+            [column],
+            unique=False,
+        )
+    op.create_index(
+        "ix_form_definition_current",
+        "form_definition_revisions",
+        ["tenant_id", "form_id", "superseded_at"],
+        unique=False,
+    )
+    op.create_index(
+        "ix_form_definition_catalog",
+        "form_definition_revisions",
+        ["tenant_id", "publication_state", "form_key"],
+        unique=False,
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("form_definition_revisions")

src/govoplan_forms/backend/router.py

@@ -0,0 +1,243 @@
+from __future__ import annotations
+
+from datetime import UTC, datetime
+
+from fastapi import APIRouter, Depends, HTTPException, Query, status
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal, get_api_principal, has_scope
+from govoplan_core.core.institutional import InstitutionalContextError
+from govoplan_core.db.session import get_session
+from govoplan_forms.backend.manifest import ADMIN_SCOPE, READ_SCOPE, WRITE_SCOPE
+from govoplan_forms.backend.schemas import (
+    FormDefinitionHistoryResponse,
+    FormDefinitionListResponse,
+    FormDefinitionWriteRequest,
+    FormPackageImportRequest,
+    FormPackageRequest,
+)
+from govoplan_forms.backend.service import (
+    FormDefinitionStoreError,
+    definition_from_mapping,
+    assess_form_definition_fragment,
+    export_form_definition_fragment,
+    form_definition_diagnostics,
+    form_definition_history,
+    get_form_definition,
+    list_form_definitions,
+    import_form_definition_fragment,
+    record_form_definition,
+)
+
+
+router = APIRouter(prefix="/forms", tags=["forms"])
+
+
+def _require(principal: ApiPrincipal, scope: str) -> None:
+    if not has_scope(principal, scope):
+        raise HTTPException(status_code=403, detail=f"Missing scope: {scope}")
+
+
+def _error(exc: Exception) -> HTTPException:
+    message = str(exc)
+    code = (
+        409
+        if any(word in message.casefold() for word in ("conflict", "already", "stale"))
+        else 400
+    )
+    return HTTPException(status_code=code, detail=message)
+
+
+@router.get("/definitions", response_model=FormDefinitionListResponse)
+def api_list_form_definitions(
+    q: str = Query(default="", max_length=200),
+    publication_state: list[str] | None = Query(default=None),
+    offset: int = Query(default=0, ge=0),
+    limit: int = Query(default=100, ge=1, le=200),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> FormDefinitionListResponse:
+    _require(principal, READ_SCOPE)
+    try:
+        items, total = list_form_definitions(
+            session,
+            principal,
+            query=q,
+            publication_states=publication_state,
+            offset=offset,
+            limit=limit,
+        )
+    except FormDefinitionStoreError as exc:
+        raise _error(exc) from exc
+    return FormDefinitionListResponse(
+        definitions=[item.to_dict() for item in items],
+        total=total,
+    )
+
+
+@router.put(
+    "/definitions/{form_id}",
+    response_model=dict[str, object],
+    status_code=status.HTTP_200_OK,
+)
+def api_record_form_definition(
+    form_id: str,
+    payload: FormDefinitionWriteRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> dict[str, object]:
+    _require(principal, WRITE_SCOPE)
+    try:
+        definition = definition_from_mapping(payload.definition)
+        if definition.reference.object_id != form_id:
+            raise FormDefinitionStoreError(
+                "Form definition path and payload IDs must match."
+            )
+        if definition.publication_state != "draft":
+            _require(principal, ADMIN_SCOPE)
+        stored = record_form_definition(
+            session,
+            principal,
+            definition=definition,
+            expected_revision=payload.expected_revision,
+        )
+        session.commit()
+    except (FormDefinitionStoreError, InstitutionalContextError) as exc:
+        session.rollback()
+        raise _error(exc) from exc
+    return stored.to_dict()
+
+
+@router.get("/definitions/{form_id}", response_model=dict[str, object])
+def api_get_form_definition(
+    form_id: str,
+    revision: str | None = Query(default=None, max_length=255),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> dict[str, object]:
+    _require(principal, READ_SCOPE)
+    item = get_form_definition(
+        session,
+        principal,
+        form_id=form_id,
+        revision=revision,
+    )
+    if item is None:
+        raise HTTPException(status_code=404, detail="Form definition not found")
+    return item.to_dict()
+
+
+@router.get("/definitions/{form_id}/diagnostics", response_model=dict[str, object])
+def api_form_definition_diagnostics(
+    form_id: str,
+    revision: str | None = Query(default=None, max_length=255),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> dict[str, object]:
+    _require(principal, READ_SCOPE)
+    item = get_form_definition(session, principal, form_id=form_id, revision=revision)
+    if item is None:
+        raise HTTPException(status_code=404, detail="Form definition not found")
+    diagnostics = form_definition_diagnostics(item)
+    return {
+        "diagnostics": [dict(value) for value in diagnostics],
+        "error_count": sum(value.get("severity") == "error" for value in diagnostics),
+        "warning_count": sum(
+            value.get("severity") == "warning" for value in diagnostics
+        ),
+    }
+
+
+@router.get("/definitions/{form_id}/package", response_model=dict[str, object])
+def api_export_form_definition_package(
+    form_id: str,
+    revision: str | None = Query(default=None, max_length=255),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> dict[str, object]:
+    _require(principal, READ_SCOPE)
+    item = get_form_definition(session, principal, form_id=form_id, revision=revision)
+    if item is None:
+        raise HTTPException(status_code=404, detail="Form definition not found")
+    actor_id = next(
+        (
+            str(getattr(principal, name))
+            for name in ("account_id", "identity_id", "membership_id")
+            if getattr(principal, name, None)
+        ),
+        None,
+    )
+    return export_form_definition_fragment(
+        item,
+        exported_at=datetime.now(UTC),
+        exported_by=actor_id,
+    )
+
+
+@router.post("/packages/assess", response_model=dict[str, object])
+def api_assess_form_definition_package(
+    payload: FormPackageRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> dict[str, object]:
+    _require(principal, WRITE_SCOPE)
+    try:
+        return assess_form_definition_fragment(
+            session,
+            principal,
+            fragment=payload.fragment,
+        )
+    except (FormDefinitionStoreError, InstitutionalContextError) as exc:
+        raise _error(exc) from exc
+
+
+@router.post("/packages/import", response_model=dict[str, object])
+def api_import_form_definition_package(
+    payload: FormPackageImportRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> dict[str, object]:
+    _require(principal, WRITE_SCOPE)
+    try:
+        item = import_form_definition_fragment(
+            session,
+            principal,
+            fragment=payload.fragment,
+            target_form_id=payload.target_form_id,
+            target_key=payload.target_key,
+            expected_revision=payload.expected_revision,
+            change_reason=payload.change_reason,
+            recorded_at=payload.recorded_at,
+        )
+        session.commit()
+    except (FormDefinitionStoreError, InstitutionalContextError) as exc:
+        session.rollback()
+        raise _error(exc) from exc
+    return item.to_dict()
+
+
+@router.get(
+    "/definitions/{form_id}/history",
+    response_model=FormDefinitionHistoryResponse,
+)
+def api_form_definition_history(
+    form_id: str,
+    limit: int = Query(default=100, ge=1, le=200),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> FormDefinitionHistoryResponse:
+    _require(principal, READ_SCOPE)
+    return FormDefinitionHistoryResponse(
+        revisions=[
+            item.to_dict()
+            for item in form_definition_history(
+                session,
+                principal,
+                form_id=form_id,
+                limit=limit,
+            )
+        ]
+    )
+
+
+__all__ = ["router"]

src/govoplan_forms/backend/schemas.py

@@ -0,0 +1,45 @@
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Any
+
+from pydantic import BaseModel, ConfigDict, Field
+
+
+class FormDefinitionWriteRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    definition: dict[str, Any]
+    expected_revision: str | None = Field(default=None, min_length=1, max_length=255)
+
+
+class FormDefinitionListResponse(BaseModel):
+    definitions: list[dict[str, Any]]
+    total: int
+
+
+class FormDefinitionHistoryResponse(BaseModel):
+    revisions: list[dict[str, Any]]
+
+
+class FormPackageRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    fragment: dict[str, Any]
+
+
+class FormPackageImportRequest(FormPackageRequest):
+    target_form_id: str | None = Field(default=None, min_length=1, max_length=255)
+    target_key: str | None = Field(default=None, min_length=1, max_length=255)
+    expected_revision: str | None = Field(default=None, min_length=1, max_length=255)
+    change_reason: str = Field(min_length=1, max_length=1000)
+    recorded_at: datetime
+
+
+__all__ = [
+    "FormDefinitionHistoryResponse",
+    "FormDefinitionListResponse",
+    "FormDefinitionWriteRequest",
+    "FormPackageImportRequest",
+    "FormPackageRequest",
+]

src/govoplan_forms/backend/service.py

@@ -0,0 +1,825 @@
+from __future__ import annotations
+
+from datetime import UTC, datetime
+import hashlib
+import hmac
+import json
+import re
+from typing import Any, Mapping, Sequence
+import uuid
+
+from sqlalchemy import func
+from sqlalchemy.orm import Session
+
+from govoplan_core.core.events import (
+    EventActorRef,
+    EventObjectRef,
+    EventTenantRef,
+    PlatformEvent,
+    emit_platform_event,
+)
+from govoplan_core.core.institutional import (
+    FormDefinition,
+    FormConditionExpression,
+    FormFieldDefinition,
+    InstitutionalContextError,
+    InstitutionalReference,
+)
+from govoplan_forms.backend.db.models import FormDefinitionRevision
+
+
+_PUBLICATION_TRANSITIONS: dict[str, frozenset[str]] = {
+    "draft": frozenset({"draft", "published", "retired"}),
+    "published": frozenset({"published", "retired"}),
+    "retired": frozenset(),
+}
+
+
+class FormDefinitionStoreError(ValueError):
+    pass
+
+
+def definition_from_mapping(value: Mapping[str, object]) -> FormDefinition:
+    try:
+        return FormDefinition.from_mapping(value)
+    except InstitutionalContextError as exc:
+        raise FormDefinitionStoreError(str(exc)) from exc
+
+
+def record_form_definition(
+    session: Session,
+    principal: object,
+    *,
+    definition: FormDefinition,
+    expected_revision: str | None = None,
+) -> FormDefinition:
+    tenant_id = _principal_tenant(principal)
+    _validate_definition(definition, tenant_id=tenant_id)
+    payload = definition.to_dict()
+    replay = (
+        session.query(FormDefinitionRevision)
+        .filter(
+            FormDefinitionRevision.tenant_id == tenant_id,
+            FormDefinitionRevision.form_id == definition.reference.object_id,
+            FormDefinitionRevision.revision == definition.temporal.revision,
+        )
+        .one_or_none()
+    )
+    if replay is not None:
+        if replay.payload != payload:
+            raise FormDefinitionStoreError(
+                "A different Form definition already uses this revision."
+            )
+        return _definition_from_row(replay)
+
+    current = _current_row(
+        session,
+        tenant_id=tenant_id,
+        form_id=definition.reference.object_id,
+        lock=True,
+    )
+    if current is None:
+        if expected_revision is not None:
+            raise FormDefinitionStoreError(
+                "Form definition revision conflict: no current revision exists."
+            )
+        key_collision = (
+            session.query(FormDefinitionRevision.id)
+            .filter(
+                FormDefinitionRevision.tenant_id == tenant_id,
+                FormDefinitionRevision.form_key == definition.key,
+                FormDefinitionRevision.superseded_at.is_(None),
+            )
+            .first()
+        )
+        if key_collision is not None:
+            raise FormDefinitionStoreError(
+                "Form definition key is already in use in this tenant."
+            )
+    else:
+        if expected_revision != current.revision:
+            raise FormDefinitionStoreError(
+                "Form definition revision conflict: the expected revision is stale."
+            )
+        if definition.key != current.form_key:
+            raise FormDefinitionStoreError(
+                "A Form definition key cannot change across revisions."
+            )
+        if (
+            definition.publication_state
+            not in _PUBLICATION_TRANSITIONS[current.publication_state]
+        ):
+            raise FormDefinitionStoreError(
+                f"Form publication transition {current.publication_state!r} to "
+                f"{definition.publication_state!r} is not allowed."
+            )
+        current.superseded_at = _recorded_at(definition)
+
+    row = FormDefinitionRevision(
+        tenant_id=tenant_id,
+        form_id=definition.reference.object_id,
+        form_key=definition.key,
+        revision=definition.temporal.revision,
+        previous_revision_id=current.id if current is not None else None,
+        publication_state=definition.publication_state,
+        title=definition.title,
+        recorded_at=_recorded_at(definition),
+        search_text=f"{definition.key} {definition.title} {definition.description or ''}".casefold(),
+        payload=payload,
+        changed_by=_principal_actor(principal),
+    )
+    session.add(row)
+    session.flush()
+    event_id = str(uuid.uuid4())
+    emit_platform_event(
+        session,
+        PlatformEvent(
+            event_id=event_id,
+            type="forms.definition.recorded",
+            module_id="forms",
+            payload={
+                "form_id": row.form_id,
+                "form_key": row.form_key,
+                "revision": row.revision,
+                "publication_state": row.publication_state,
+                "field_count": len(definition.fields),
+            },
+            occurred_at=row.recorded_at,
+            actor=EventActorRef(type="account", id=_principal_actor(principal)),
+            tenant=EventTenantRef(id=tenant_id),
+            resource=EventObjectRef(
+                type="form_definition",
+                id=row.form_id,
+                label=row.title,
+            ),
+            classification="internal",
+        ),
+    )
+    return _definition_from_row(row)
+
+
+def form_definition_diagnostics(
+    definition: FormDefinition,
+) -> tuple[Mapping[str, object], ...]:
+    """Return deterministic, non-blocking authoring diagnostics.
+
+    Structural errors are rejected by ``_validate_definition``. Diagnostics are
+    reserved for useful publication quality feedback such as untranslated text.
+    """
+
+    diagnostics: list[Mapping[str, object]] = []
+    field_by_key = {item.key: item for item in definition.fields}
+    page_keys = {item.key for item in definition.pages}
+    section_keys = {item.key for page in definition.pages for item in page.sections}
+    for localization in definition.localizations:
+        locale = localization.locale
+        if not localization.title:
+            diagnostics.append(
+                _definition_diagnostic(
+                    "warning",
+                    "translation.title_missing",
+                    f"{locale} does not translate the Form title.",
+                    locale=locale,
+                )
+            )
+        for field in definition.fields:
+            if field.key not in localization.field_labels:
+                diagnostics.append(
+                    _definition_diagnostic(
+                        "warning",
+                        "translation.field_label_missing",
+                        f"{locale} does not translate field {field.key!r}.",
+                        locale=locale,
+                        subject=field.key,
+                    )
+                )
+            if field.help_text and field.key not in localization.field_help_texts:
+                diagnostics.append(
+                    _definition_diagnostic(
+                        "warning",
+                        "translation.field_help_missing",
+                        f"{locale} does not translate help for field {field.key!r}.",
+                        locale=locale,
+                        subject=field.key,
+                    )
+                )
+            translated_options = localization.option_labels.get(field.key, {})
+            for option in field.options:
+                if option not in translated_options:
+                    diagnostics.append(
+                        _definition_diagnostic(
+                            "warning",
+                            "translation.option_missing",
+                            f"{locale} does not translate option {option!r} of field {field.key!r}.",
+                            locale=locale,
+                            subject=f"{field.key}:{option}",
+                        )
+                    )
+        for key in sorted(page_keys - set(localization.page_titles)):
+            diagnostics.append(
+                _definition_diagnostic(
+                    "warning",
+                    "translation.page_title_missing",
+                    f"{locale} does not translate page {key!r}.",
+                    locale=locale,
+                    subject=key,
+                )
+            )
+        for key in sorted(section_keys - set(localization.section_titles)):
+            diagnostics.append(
+                _definition_diagnostic(
+                    "warning",
+                    "translation.section_title_missing",
+                    f"{locale} does not translate section {key!r}.",
+                    locale=locale,
+                    subject=key,
+                )
+            )
+        # These sets are validated structurally. Keeping the lookup here makes
+        # diagnostics stable if future compatible readers retain unknown keys.
+        _ = field_by_key
+    return tuple(diagnostics)
+
+
+def export_form_definition_fragment(
+    definition: FormDefinition,
+    *,
+    exported_at: datetime,
+    exported_by: str | None,
+) -> dict[str, object]:
+    if exported_at.tzinfo is None or exported_at.utcoffset() is None:
+        raise FormDefinitionStoreError("Package exported_at must include a timezone.")
+    definition_payload = definition.to_dict()
+    digest = _payload_sha256(definition_payload)
+    return {
+        "kind": "govoplan.forms.definition",
+        "contract_version": "0.1.0",
+        "definition": definition_payload,
+        "definition_sha256": digest,
+        "provenance": {
+            "owner_module": "forms",
+            "tenant_id": definition.reference.tenant_id,
+            "form_id": definition.reference.object_id,
+            "revision": definition.reference.version,
+            "exported_at": exported_at.isoformat(),
+            "exported_by": exported_by,
+        },
+    }
+
+
+def assess_form_definition_fragment(
+    session: Session,
+    principal: object,
+    *,
+    fragment: Mapping[str, object],
+) -> dict[str, object]:
+    source = _definition_from_fragment(fragment)
+    tenant_id = _principal_tenant(principal)
+    current = get_form_definition(
+        session,
+        principal,
+        form_id=source.reference.object_id,
+    )
+    key_collision = (
+        session.query(FormDefinitionRevision.form_id)
+        .filter(
+            FormDefinitionRevision.tenant_id == tenant_id,
+            FormDefinitionRevision.form_key == source.key,
+            FormDefinitionRevision.superseded_at.is_(None),
+        )
+        .first()
+    )
+    same_tenant = source.reference.tenant_id == tenant_id
+    if (
+        same_tenant
+        and current is not None
+        and current.reference.version == source.reference.version
+    ):
+        outcome = (
+            "replay" if current.to_dict() == source.to_dict() else "revision_conflict"
+        )
+    elif current is not None:
+        outcome = "new_revision_required"
+    elif key_collision is not None:
+        outcome = "key_conflict"
+    else:
+        outcome = "create"
+    return {
+        "outcome": outcome,
+        "portable": True,
+        "same_tenant": same_tenant,
+        "source": {
+            "tenant_id": source.reference.tenant_id,
+            "form_id": source.reference.object_id,
+            "key": source.key,
+            "revision": source.reference.version,
+        },
+        "current_revision": current.reference.version if current else None,
+        "requires_remap": not same_tenant,
+    }
+
+
+def import_form_definition_fragment(
+    session: Session,
+    principal: object,
+    *,
+    fragment: Mapping[str, object],
+    target_form_id: str | None,
+    target_key: str | None,
+    expected_revision: str | None,
+    change_reason: str,
+    recorded_at: datetime,
+) -> FormDefinition:
+    source = _definition_from_fragment(fragment)
+    tenant_id = _principal_tenant(principal)
+    if recorded_at.tzinfo is None or recorded_at.utcoffset() is None:
+        raise FormDefinitionStoreError(
+            "Package import recorded_at must include a timezone."
+        )
+    clean_reason = str(change_reason or "").strip()
+    if not clean_reason or len(clean_reason) > 1000:
+        raise FormDefinitionStoreError(
+            "Package import requires a change reason of at most 1000 characters."
+        )
+    resolved_id = str(target_form_id or source.reference.object_id).strip()
+    resolved_key = str(target_key or source.key).strip()
+    current = get_form_definition(session, principal, form_id=resolved_id)
+    revision = str(uuid.uuid4())
+    payload = source.to_dict()
+    payload["reference"] = {
+        **dict(payload["reference"]),
+        "object_id": resolved_id,
+        "tenant_id": tenant_id,
+        "version": revision,
+    }
+    payload["key"] = current.key if current is not None else resolved_key
+    payload["temporal"] = {
+        "revision": revision,
+        "valid_from": recorded_at.isoformat(),
+        "valid_to": None,
+        "recorded_at": recorded_at.isoformat(),
+        "superseded_at": None,
+        "change_reason": clean_reason,
+    }
+    payload["publication_state"] = "draft"
+    metadata = dict(source.metadata)
+    metadata["package_import"] = {
+        "source_tenant_id": source.reference.tenant_id,
+        "source_form_id": source.reference.object_id,
+        "source_revision": source.reference.version,
+        "source_sha256": str(fragment.get("definition_sha256") or ""),
+    }
+    payload["metadata"] = metadata
+    imported = definition_from_mapping(payload)
+    return record_form_definition(
+        session,
+        principal,
+        definition=imported,
+        expected_revision=expected_revision,
+    )
+
+
+def get_form_definition(
+    session: Session,
+    principal: object,
+    *,
+    form_id: str,
+    revision: str | None = None,
+) -> FormDefinition | None:
+    tenant_id = _principal_tenant(principal)
+    query = session.query(FormDefinitionRevision).filter(
+        FormDefinitionRevision.tenant_id == tenant_id,
+        FormDefinitionRevision.form_id == form_id,
+    )
+    if revision is None:
+        query = query.filter(FormDefinitionRevision.superseded_at.is_(None))
+    else:
+        query = query.filter(FormDefinitionRevision.revision == revision)
+    row = query.order_by(FormDefinitionRevision.recorded_at.desc()).first()
+    return _definition_from_row(row) if row is not None else None
+
+
+def list_form_definitions(
+    session: Session,
+    principal: object,
+    *,
+    query: str = "",
+    publication_states: Sequence[str] | None = None,
+    offset: int = 0,
+    limit: int = 100,
+) -> tuple[tuple[FormDefinition, ...], int]:
+    tenant_id = _principal_tenant(principal)
+    if offset < 0 or not 1 <= limit <= 200:
+        raise FormDefinitionStoreError(
+            "Form definition offset must be non-negative and limit between 1 and 200."
+        )
+    statement = session.query(FormDefinitionRevision).filter(
+        FormDefinitionRevision.tenant_id == tenant_id,
+        FormDefinitionRevision.superseded_at.is_(None),
+    )
+    if publication_states:
+        statement = statement.filter(
+            FormDefinitionRevision.publication_state.in_(tuple(publication_states))
+        )
+    clean_query = query.strip().casefold()
+    if clean_query:
+        statement = statement.filter(
+            FormDefinitionRevision.search_text.contains(clean_query)
+        )
+    total = int(statement.with_entities(func.count()).scalar() or 0)
+    rows = (
+        statement.order_by(
+            FormDefinitionRevision.form_key.asc(),
+            FormDefinitionRevision.recorded_at.desc(),
+        )
+        .offset(offset)
+        .limit(limit)
+        .all()
+    )
+    return tuple(_definition_from_row(row) for row in rows), total
+
+
+def form_definition_history(
+    session: Session,
+    principal: object,
+    *,
+    form_id: str,
+    limit: int = 100,
+) -> tuple[FormDefinition, ...]:
+    tenant_id = _principal_tenant(principal)
+    if not 1 <= limit <= 200:
+        raise FormDefinitionStoreError("Form history limit must be between 1 and 200.")
+    rows = (
+        session.query(FormDefinitionRevision)
+        .filter(
+            FormDefinitionRevision.tenant_id == tenant_id,
+            FormDefinitionRevision.form_id == form_id,
+        )
+        .order_by(FormDefinitionRevision.recorded_at.desc())
+        .limit(limit)
+        .all()
+    )
+    return tuple(_definition_from_row(row) for row in rows)
+
+
+class SqlFormDefinitionProvider:
+    def get_form_definition(
+        self,
+        session: object,
+        principal: object,
+        *,
+        reference: InstitutionalReference,
+        effective_at: datetime | None = None,
+    ) -> FormDefinition | None:
+        tenant_id = _principal_tenant(principal)
+        if (
+            reference.kind != "form"
+            or reference.owner_module != "forms"
+            or reference.tenant_id != tenant_id
+            or not reference.version
+        ):
+            raise InstitutionalContextError(
+                "Form definition lookup requires an exact same-tenant Forms reference."
+            )
+        definition = get_form_definition(
+            _session(session),
+            principal,
+            form_id=reference.object_id,
+            revision=reference.version,
+        )
+        if definition is None or (
+            effective_at is not None
+            and not definition.temporal.effective_at(effective_at)
+        ):
+            return None
+        return definition
+
+    def list_form_definitions(
+        self,
+        session: object,
+        principal: object,
+        *,
+        tenant_id: str,
+        query: str = "",
+        limit: int = 100,
+    ) -> Sequence[FormDefinition]:
+        if tenant_id != _principal_tenant(principal):
+            raise InstitutionalContextError(
+                "Form definition catalogue lookup cannot cross tenants."
+            )
+        items, _ = list_form_definitions(
+            _session(session),
+            principal,
+            query=query,
+            publication_states=("published",),
+            limit=limit,
+        )
+        return items
+
+
+def _current_row(
+    session: Session,
+    *,
+    tenant_id: str,
+    form_id: str,
+    lock: bool,
+) -> FormDefinitionRevision | None:
+    query = session.query(FormDefinitionRevision).filter(
+        FormDefinitionRevision.tenant_id == tenant_id,
+        FormDefinitionRevision.form_id == form_id,
+        FormDefinitionRevision.superseded_at.is_(None),
+    )
+    if lock:
+        query = query.with_for_update()
+    return query.one_or_none()
+
+
+def _definition_from_row(row: FormDefinitionRevision) -> FormDefinition:
+    payload: dict[str, Any] = dict(row.payload)
+    temporal = dict(payload.get("temporal") or {})
+    temporal["superseded_at"] = _datetime_text(row.superseded_at)
+    payload["temporal"] = temporal
+    return FormDefinition.from_mapping(payload)
+
+
+def _validate_definition(definition: FormDefinition, *, tenant_id: str) -> None:
+    if definition.reference.owner_module != "forms":
+        raise FormDefinitionStoreError("Form definitions must be owned by Forms.")
+    if definition.reference.tenant_id != tenant_id:
+        raise FormDefinitionStoreError("Form definitions cannot cross tenants.")
+    if definition.temporal.superseded_at is not None:
+        raise FormDefinitionStoreError("Clients cannot set Form superseded_at.")
+    _recorded_at(definition)
+    if not str(definition.temporal.change_reason or "").strip():
+        raise FormDefinitionStoreError(
+            "A Form definition revision requires a change reason."
+        )
+    _validate_form_composition(definition)
+
+
+def _validate_form_composition(definition: FormDefinition) -> None:
+    fields = {item.key: item for item in definition.fields}
+    if definition.pages:
+        field_occurrences = [
+            field_key
+            for page in definition.pages
+            for section in page.sections
+            for field_key in section.field_keys
+        ]
+        unknown = sorted(set(field_occurrences) - set(fields))
+        if unknown:
+            raise FormDefinitionStoreError(
+                f"Form pages reference unknown fields: {', '.join(unknown)}."
+            )
+        duplicates = sorted(
+            key for key in set(field_occurrences) if field_occurrences.count(key) > 1
+        )
+        if duplicates:
+            raise FormDefinitionStoreError(
+                f"Form pages place fields more than once: {', '.join(duplicates)}."
+            )
+        missing = sorted(set(fields) - set(field_occurrences))
+        if missing:
+            raise FormDefinitionStoreError(
+                f"Form pages do not place fields: {', '.join(missing)}."
+            )
+    conditions: list[tuple[str, FormConditionExpression]] = []
+    for field in definition.fields:
+        if field.visibility_condition is not None:
+            conditions.append((f"field:{field.key}", field.visibility_condition))
+    for page in definition.pages:
+        if page.visibility_condition is not None:
+            conditions.append((f"page:{page.key}", page.visibility_condition))
+        for section in page.sections:
+            if section.visibility_condition is not None:
+                conditions.append(
+                    (f"section:{section.key}", section.visibility_condition)
+                )
+    for subject, condition in conditions:
+        _validate_condition(condition, fields=fields, subject=subject)
+    graph = {
+        field.key: set(field.visibility_condition.referenced_fields)
+        if field.visibility_condition is not None
+        else set()
+        for field in definition.fields
+    }
+    _reject_condition_cycles(graph)
+    page_keys = {item.key for item in definition.pages}
+    section_keys = {item.key for page in definition.pages for item in page.sections}
+    for localization in definition.localizations:
+        unknown_fields = (
+            set(localization.field_labels)
+            | set(localization.field_help_texts)
+            | set(localization.option_labels)
+        ) - set(fields)
+        if unknown_fields:
+            raise FormDefinitionStoreError(
+                f"Form localization {localization.locale!r} references unknown fields: "
+                f"{', '.join(sorted(unknown_fields))}."
+            )
+        if set(localization.page_titles) - page_keys:
+            raise FormDefinitionStoreError(
+                f"Form localization {localization.locale!r} references unknown pages."
+            )
+        if set(localization.section_titles) - section_keys:
+            raise FormDefinitionStoreError(
+                f"Form localization {localization.locale!r} references unknown sections."
+            )
+        for field_key, labels in localization.option_labels.items():
+            field = fields[field_key]
+            if set(labels) - set(field.options):
+                raise FormDefinitionStoreError(
+                    f"Form localization {localization.locale!r} translates unknown "
+                    f"options for field {field_key!r}."
+                )
+
+
+def _validate_condition(
+    condition: FormConditionExpression,
+    *,
+    fields: Mapping[str, FormFieldDefinition],
+    subject: str,
+) -> None:
+    if condition.kind != "predicate":
+        for child in condition.conditions:
+            _validate_condition(child, fields=fields, subject=subject)
+        return
+    field_key = str(condition.field_key)
+    field = fields.get(field_key)
+    if field is None:
+        raise FormDefinitionStoreError(
+            f"Form condition on {subject} references unknown field {field_key!r}."
+        )
+    operator = str(condition.operator)
+    if operator in {"lt", "lte", "gt", "gte"} and field.value_type not in {
+        "integer",
+        "number",
+        "date",
+        "datetime",
+    }:
+        raise FormDefinitionStoreError(
+            f"Form condition operator {operator!r} is incompatible with "
+            f"field {field_key!r} ({field.value_type})."
+        )
+    if operator == "contains" and field.value_type not in {
+        "text",
+        "multiline_text",
+        "email",
+        "multi_choice",
+        "list",
+    }:
+        raise FormDefinitionStoreError(
+            f"Form condition operator 'contains' is incompatible with field {field_key!r}."
+        )
+    if operator in {"in", "not_in"} and (
+        not isinstance(condition.value, Sequence)
+        or isinstance(condition.value, (str, bytes))
+    ):
+        raise FormDefinitionStoreError(
+            f"Form condition operator {operator!r} requires a list value."
+        )
+    if operator not in {"is_empty", "is_not_empty", "in", "not_in"}:
+        if not _condition_value_matches(field, condition.value):
+            raise FormDefinitionStoreError(
+                f"Form condition value is incompatible with field {field_key!r} "
+                f"({field.value_type})."
+            )
+
+
+def _condition_value_matches(field: FormFieldDefinition, value: object) -> bool:
+    if value is None:
+        return True
+    if field.value_type == "boolean":
+        return isinstance(value, bool)
+    if field.value_type == "integer":
+        return isinstance(value, int) and not isinstance(value, bool)
+    if field.value_type == "number":
+        return isinstance(value, (int, float)) and not isinstance(value, bool)
+    if field.value_type in {"object"}:
+        return isinstance(value, Mapping)
+    if field.value_type in {"list", "multi_choice"}:
+        return isinstance(value, Sequence) and not isinstance(value, (str, bytes))
+    return isinstance(value, str)
+
+
+def _reject_condition_cycles(graph: Mapping[str, set[str]]) -> None:
+    visiting: set[str] = set()
+    visited: set[str] = set()
+
+    def visit(key: str, path: tuple[str, ...]) -> None:
+        if key in visiting:
+            cycle = " -> ".join((*path, key))
+            raise FormDefinitionStoreError(
+                f"Form visibility conditions contain a dependency cycle: {cycle}."
+            )
+        if key in visited:
+            return
+        visiting.add(key)
+        for dependency in sorted(graph.get(key, set())):
+            if dependency in graph:
+                visit(dependency, (*path, key))
+        visiting.remove(key)
+        visited.add(key)
+
+    for key in sorted(graph):
+        visit(key, ())
+
+
+def _definition_from_fragment(fragment: Mapping[str, object]) -> FormDefinition:
+    if fragment.get("kind") != "govoplan.forms.definition":
+        raise FormDefinitionStoreError("Unsupported Forms package fragment kind.")
+    if fragment.get("contract_version") != "0.1.0":
+        raise FormDefinitionStoreError("Unsupported Forms package contract version.")
+    payload = fragment.get("definition")
+    if not isinstance(payload, Mapping):
+        raise FormDefinitionStoreError("Forms package definition must be an object.")
+    expected = str(fragment.get("definition_sha256") or "")
+    if not re.fullmatch(r"[0-9a-f]{64}", expected) or not _constant_time_equal(
+        expected,
+        _payload_sha256(payload),
+    ):
+        raise FormDefinitionStoreError("Forms package definition digest is invalid.")
+    return definition_from_mapping(payload)
+
+
+def _payload_sha256(value: Mapping[str, object]) -> str:
+    encoded = json.dumps(
+        value,
+        sort_keys=True,
+        separators=(",", ":"),
+        ensure_ascii=True,
+    ).encode("utf-8")
+    return hashlib.sha256(encoded).hexdigest()
+
+
+def _constant_time_equal(left: str, right: str) -> bool:
+    return hmac.compare_digest(left, right)
+
+
+def _definition_diagnostic(
+    severity: str,
+    code: str,
+    message: str,
+    *,
+    locale: str | None = None,
+    subject: str | None = None,
+) -> Mapping[str, object]:
+    return {
+        "severity": severity,
+        "code": code,
+        "message": message,
+        "locale": locale,
+        "subject": subject,
+    }
+
+
+def _recorded_at(definition: FormDefinition) -> datetime:
+    if definition.temporal.recorded_at is None:
+        raise FormDefinitionStoreError(
+            "A Form definition revision requires recorded_at."
+        )
+    return definition.temporal.recorded_at
+
+
+def _principal_tenant(principal: object) -> str:
+    tenant_id = str(getattr(principal, "tenant_id", "") or "").strip()
+    if not tenant_id:
+        raise InstitutionalContextError(
+            "Form definition operations require a tenant-bound principal."
+        )
+    return tenant_id
+
+
+def _principal_actor(principal: object) -> str | None:
+    for name in ("account_id", "identity_id", "membership_id"):
+        value = str(getattr(principal, name, "") or "").strip()
+        if value:
+            return value
+    return None
+
+
+def _session(value: object) -> Session:
+    if not hasattr(value, "query"):
+        raise InstitutionalContextError(
+            "Form definition provider requires a database session."
+        )
+    return value  # type: ignore[return-value]
+
+
+def _datetime_text(value: datetime | None) -> str | None:
+    if value is None:
+        return None
+    if value.tzinfo is None:
+        value = value.replace(tzinfo=UTC)
+    return value.isoformat()
+
+
+__all__ = [
+    "FormDefinitionStoreError",
+    "SqlFormDefinitionProvider",
+    "definition_from_mapping",
+    "form_definition_history",
+    "get_form_definition",
+    "list_form_definitions",
+    "record_form_definition",
+]

src/govoplan_forms/py.typed

@@ -0,0 +1 @@
+

tests/test_forms.py

@@ -0,0 +1,298 @@
+from __future__ import annotations
+
+from dataclasses import dataclass, replace
+from datetime import UTC, datetime, timedelta
+import unittest
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import Session
+
+from govoplan_core.core.institutional import (
+    FormDefinition,
+    FormConditionExpression,
+    FormFieldDefinition,
+    FormLocalization,
+    FormPageDefinition,
+    FormSectionDefinition,
+    InstitutionalReference,
+    TemporalRevision,
+)
+from govoplan_forms.backend.db.models import FormDefinitionRevision
+from govoplan_forms.backend.service import (
+    FormDefinitionStoreError,
+    SqlFormDefinitionProvider,
+    assess_form_definition_fragment,
+    export_form_definition_fragment,
+    form_definition_diagnostics,
+    form_definition_history,
+    import_form_definition_fragment,
+    record_form_definition,
+)
+
+
+NOW = datetime(2026, 8, 1, 10, 0, tzinfo=UTC)
+
+
+@dataclass
+class Principal:
+    tenant_id: str = "tenant-1"
+    account_id: str = "account-1"
+
+
+def definition(
+    *,
+    revision: str = "1",
+    state: str = "published",
+    tenant_id: str = "tenant-1",
+) -> FormDefinition:
+    recorded_at = NOW + timedelta(minutes=int(revision) - 1)
+    return FormDefinition(
+        reference=InstitutionalReference(
+            kind="form",
+            owner_module="forms",
+            object_id="permit-application",
+            tenant_id=tenant_id,
+            version=revision,
+        ),
+        key="permit-application",
+        temporal=TemporalRevision(
+            revision=revision,
+            recorded_at=recorded_at,
+            change_reason="Initial schema." if revision == "1" else "Revise schema.",
+        ),
+        title="Permit application",
+        fields=(
+            FormFieldDefinition(
+                key="name",
+                label="Name",
+                required=True,
+                constraints={"min_length": 2, "max_length": 200},
+            ),
+            FormFieldDefinition(
+                key="delivery",
+                label="Delivery",
+                value_type="choice",
+                options=("portal", "mail"),
+            ),
+        ),
+        publication_state=state,  # type: ignore[arg-type]
+        allow_drafts=True,
+        max_attachments=2,
+        handoff_kinds=("case",),
+    )
+
+
+class FormsTests(unittest.TestCase):
+    def setUp(self) -> None:
+        self.engine = create_engine("sqlite+pysqlite:///:memory:")
+        FormDefinitionRevision.__table__.create(self.engine)
+        self.session = Session(self.engine)
+        self.principal = Principal()
+
+    def tearDown(self) -> None:
+        self.session.close()
+        self.engine.dispose()
+
+    def test_provider_returns_exact_published_revision_and_history(self) -> None:
+        first = record_form_definition(
+            self.session,
+            self.principal,
+            definition=definition(),
+        )
+        provider = SqlFormDefinitionProvider()
+
+        self.assertEqual(
+            (first,),
+            tuple(
+                provider.list_form_definitions(
+                    self.session,
+                    self.principal,
+                    tenant_id="tenant-1",
+                )
+            ),
+        )
+        exact = provider.get_form_definition(
+            self.session,
+            self.principal,
+            reference=first.reference,
+            effective_at=NOW,
+        )
+        self.assertEqual("1", exact.temporal.revision if exact else None)
+
+        record_form_definition(
+            self.session,
+            self.principal,
+            definition=definition(revision="2"),
+            expected_revision="1",
+        )
+        self.assertEqual(
+            ["2", "1"],
+            [
+                item.temporal.revision
+                for item in form_definition_history(
+                    self.session,
+                    self.principal,
+                    form_id="permit-application",
+                )
+            ],
+        )
+
+    def test_replay_occ_and_tenant_boundaries_fail_closed(self) -> None:
+        first = record_form_definition(
+            self.session,
+            self.principal,
+            definition=definition(),
+        )
+        replay = record_form_definition(
+            self.session,
+            self.principal,
+            definition=definition(),
+        )
+        self.assertEqual(first, replay)
+
+        with self.assertRaisesRegex(FormDefinitionStoreError, "stale"):
+            record_form_definition(
+                self.session,
+                self.principal,
+                definition=definition(revision="2"),
+                expected_revision="0",
+            )
+        with self.assertRaisesRegex(FormDefinitionStoreError, "cross tenants"):
+            record_form_definition(
+                self.session,
+                self.principal,
+                definition=definition(tenant_id="tenant-2"),
+            )
+        with self.assertRaisesRegex(Exception, "cross tenants"):
+            SqlFormDefinitionProvider().list_form_definitions(
+                self.session,
+                Principal("tenant-2"),
+                tenant_id="tenant-1",
+            )
+
+    def test_pages_conditions_and_localization_are_validated(self) -> None:
+        item = definition()
+        composed = replace(
+            item,
+            fields=(
+                item.fields[0],
+                replace(
+                    item.fields[1],
+                    visibility_condition=FormConditionExpression(
+                        kind="predicate",
+                        field_key="name",
+                        operator="is_not_empty",
+                    ),
+                ),
+            ),
+            pages=(
+                FormPageDefinition(
+                    key="application",
+                    title="Application",
+                    sections=(
+                        FormSectionDefinition(
+                            key="details",
+                            title="Details",
+                            field_keys=("name", "delivery"),
+                        ),
+                    ),
+                ),
+            ),
+            fallback_locale="de",
+            localizations=(
+                FormLocalization(
+                    locale="de",
+                    title="Antrag",
+                    field_labels={"name": "Name", "delivery": "Zustellung"},
+                    option_labels={"delivery": {"portal": "Portal", "mail": "Post"}},
+                    page_titles={"application": "Antrag"},
+                    section_titles={"details": "Angaben"},
+                ),
+            ),
+        )
+        stored = record_form_definition(
+            self.session,
+            self.principal,
+            definition=composed,
+        )
+        self.assertEqual("application", stored.pages[0].key)
+        self.assertEqual((), form_definition_diagnostics(stored))
+
+        cyclic = replace(
+            definition(revision="2"),
+            fields=(
+                replace(
+                    item.fields[0],
+                    visibility_condition=FormConditionExpression(
+                        kind="predicate",
+                        field_key="delivery",
+                        operator="eq",
+                        value="portal",
+                    ),
+                ),
+                replace(
+                    item.fields[1],
+                    visibility_condition=FormConditionExpression(
+                        kind="predicate",
+                        field_key="name",
+                        operator="is_not_empty",
+                    ),
+                ),
+            ),
+        )
+        with self.assertRaisesRegex(FormDefinitionStoreError, "dependency cycle"):
+            record_form_definition(
+                self.session,
+                self.principal,
+                definition=cyclic,
+                expected_revision="1",
+            )
+
+    def test_package_fragment_is_verified_assessed_and_imported_as_draft(self) -> None:
+        source = definition(tenant_id="tenant-source")
+        fragment = export_form_definition_fragment(
+            source,
+            exported_at=NOW,
+            exported_by="source-account",
+        )
+        assessment = assess_form_definition_fragment(
+            self.session,
+            self.principal,
+            fragment=fragment,
+        )
+        self.assertEqual("create", assessment["outcome"])
+        self.assertTrue(assessment["requires_remap"])
+
+        imported = import_form_definition_fragment(
+            self.session,
+            self.principal,
+            fragment=fragment,
+            target_form_id="local-permit",
+            target_key="local-permit",
+            expected_revision=None,
+            change_reason="Import reviewed package.",
+            recorded_at=NOW,
+        )
+        self.assertEqual("tenant-1", imported.reference.tenant_id)
+        self.assertEqual("draft", imported.publication_state)
+        self.assertEqual(
+            "tenant-source",
+            imported.metadata["package_import"]["source_tenant_id"],
+        )
+
+        tampered = dict(fragment)
+        tampered["definition"] = {**fragment["definition"], "title": "Tampered"}
+        with self.assertRaisesRegex(FormDefinitionStoreError, "digest"):
+            assess_form_definition_fragment(
+                self.session,
+                self.principal,
+                fragment=tampered,
+            )
+
+
+if __name__ == "__main__":
+    unittest.main()
+    (assess_form_definition_fragment,)
+    (export_form_definition_fragment,)
+    (form_definition_diagnostics,)
+    (import_form_definition_fragment,)

tests/test_interface_documentation_contract.py

@@ -0,0 +1,30 @@
+from __future__ import annotations
+
+import unittest
+
+from govoplan_forms.backend.manifest import manifest
+
+
+class FormsInterfaceDocumentationContractTests(unittest.TestCase):
+    def test_route_and_surfaces_remain_declared(self) -> None:
+        frontend = manifest.frontend
+        self.assertIsNotNone(frontend)
+        self.assertEqual({"/forms"}, {item.path for item in frontend.routes})  # type: ignore[union-attr]
+        self.assertEqual(
+            {"forms.navigation", "forms.catalogue"},
+            {item.id for item in frontend.view_surfaces},  # type: ignore[union-attr]
+        )
+
+    def test_help_privacy_and_consequence_metadata_remain_published(self) -> None:
+        topics = {topic.id: topic for topic in manifest.documentation}
+        guide = topics["forms.definitions"]
+        reference = topics["forms.reference.fields-and-consequences"]
+        self.assertIn("forms.catalogue", guide.metadata["help_contexts"])
+        self.assertGreaterEqual(len(guide.metadata["privacy_notes"]), 3)
+        self.assertIn("forms.field.publication-state", reference.metadata["help_contexts"])
+        self.assertIn("publish", reference.metadata["consequence_classes"])
+        self.assertIn("import_package", reference.metadata["consequence_classes"])
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_migrations.py

@@ -0,0 +1,39 @@
+from __future__ import annotations
+
+from pathlib import Path
+import tempfile
+import unittest
+
+from alembic.runtime.migration import MigrationContext
+from sqlalchemy import create_engine, inspect
+
+from govoplan_core.db.migrations import migrate_database
+from govoplan_forms.backend.manifest import get_manifest
+
+
+class FormsMigrationTests(unittest.TestCase):
+    def test_fresh_migration_creates_definition_store_and_head(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="govoplan-forms-migration-") as directory:
+            url = f"sqlite:///{Path(directory) / 'forms.db'}"
+            migrate_database(
+                database_url=url,
+                enabled_modules=("forms",),
+                manifest_factories=(get_manifest,),
+            )
+            engine = create_engine(url)
+            try:
+                self.assertIn(
+                    "form_definition_revisions",
+                    inspect(engine).get_table_names(),
+                )
+                with engine.connect() as connection:
+                    self.assertIn(
+                        "e1f2a3b4c5d6",
+                        set(MigrationContext.configure(connection).get_current_heads()),
+                    )
+            finally:
+                engine.dispose()
+
+
+if __name__ == "__main__":
+    unittest.main()

webui/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "@govoplan/forms-webui",
+  "version": "0.1.15",
+  "private": true,
+  "type": "module",
+  "main": "src/index.ts",
+  "module": "src/index.ts",
+  "types": "src/index.ts",
+  "exports": {
+    ".": {
+      "types": "./src/index.ts",
+      "import": "./src/index.ts"
+    },
+    "./styles/forms.css": "./src/styles/forms.css"
+  },
+  "peerDependencies": {
+    "@govoplan/core-webui": "^0.1.15",
+    "lucide-react": "^1.23.0",
+    "react": ">=19.2.7 <20",
+    "react-dom": ">=19.2.7 <20"
+  },
+  "peerDependenciesMeta": {
+    "@govoplan/core-webui": {
+      "optional": true
+    }
+  }
+}

webui/src/api/forms.ts

@@ -0,0 +1,153 @@
+import { apiFetch, apiPath, type ApiSettings } from "@govoplan/core-webui";
+
+
+export type FormValueType = "text" | "multiline_text" | "integer" | "number" | "boolean" | "date" | "datetime" | "email" | "choice" | "multi_choice" | "object" | "list";
+
+export type FormCondition =
+  | { kind: "predicate"; field_key: string; operator: "eq" | "neq" | "lt" | "lte" | "gt" | "gte" | "in" | "not_in" | "contains" | "is_empty" | "is_not_empty"; value?: unknown }
+  | { kind: "all" | "any"; conditions: FormCondition[] }
+  | { kind: "not"; conditions: [FormCondition] };
+
+export type FormFieldDefinition = {
+  key: string;
+  label: string;
+  value_type: FormValueType;
+  required: boolean;
+  help_text?: string | null;
+  options: string[];
+  constraints: Record<string, unknown>;
+  default_value?: unknown;
+  visibility_condition?: FormCondition | null;
+  accessibility?: Record<string, unknown>;
+};
+
+export type FormSectionDefinition = {
+  key: string;
+  title: string;
+  description?: string | null;
+  field_keys: string[];
+  visibility_condition?: FormCondition | null;
+};
+
+export type FormPageDefinition = {
+  key: string;
+  title: string;
+  description?: string | null;
+  sections: FormSectionDefinition[];
+  visibility_condition?: FormCondition | null;
+};
+
+export type FormLocalization = {
+  locale: string;
+  title?: string | null;
+  description?: string | null;
+  field_labels: Record<string, string>;
+  field_help_texts: Record<string, string>;
+  option_labels: Record<string, Record<string, string>>;
+  page_titles: Record<string, string>;
+  section_titles: Record<string, string>;
+};
+
+export type FormDefinition = {
+  reference: {
+    kind: "form";
+    owner_module: "forms";
+    object_id: string;
+    tenant_id: string;
+    version: string;
+  };
+  key: string;
+  temporal: {
+    revision: string;
+    valid_from?: string | null;
+    valid_to?: string | null;
+    recorded_at: string;
+    superseded_at?: string | null;
+    change_reason: string;
+  };
+  title: string;
+  description?: string | null;
+  fields: FormFieldDefinition[];
+  publication_state: "draft" | "published" | "retired";
+  allow_drafts: boolean;
+  max_attachments: number;
+  signature_requirement: "none" | "optional" | "required";
+  policy_refs: string[];
+  handoff_kinds: string[];
+  pages?: FormPageDefinition[];
+  fallback_locale?: string | null;
+  localizations?: FormLocalization[];
+  accessibility?: Record<string, unknown>;
+  metadata: Record<string, unknown>;
+};
+
+export type FormPackageFragment = {
+  kind: "govoplan.forms.definition";
+  contract_version: "0.1.0";
+  definition: FormDefinition;
+  definition_sha256: string;
+  provenance: Record<string, unknown>;
+};
+
+export function listFormDefinitions(
+  settings: ApiSettings,
+  options: { query?: string; states?: string[]; offset?: number; limit?: number } = {},
+  signal?: AbortSignal
+): Promise<{ definitions: FormDefinition[]; total: number }> {
+  return apiFetch(settings, apiPath("/api/v1/forms/definitions", {
+    q: options.query,
+    publication_state: options.states,
+    offset: options.offset ?? 0,
+    limit: options.limit ?? 200
+  }), { signal });
+}
+
+export function saveFormDefinition(
+  settings: ApiSettings,
+  definition: FormDefinition,
+  expectedRevision?: string | null
+): Promise<FormDefinition> {
+  return apiFetch(settings, `/api/v1/forms/definitions/${encodeURIComponent(definition.reference.object_id)}`, {
+    method: "PUT",
+    body: JSON.stringify({
+      definition,
+      expected_revision: expectedRevision ?? null
+    })
+  });
+}
+
+export function exportFormDefinitionPackage(
+  settings: ApiSettings,
+  formId: string,
+  revision: string
+): Promise<FormPackageFragment> {
+  return apiFetch(settings, apiPath(`/api/v1/forms/definitions/${encodeURIComponent(formId)}/package`, { revision }));
+}
+
+export function assessFormDefinitionPackage(
+  settings: ApiSettings,
+  fragment: FormPackageFragment
+): Promise<{ outcome: string; requires_remap: boolean; current_revision?: string | null }> {
+  return apiFetch(settings, "/api/v1/forms/packages/assess", {
+    method: "POST",
+    body: JSON.stringify({ fragment })
+  });
+}
+
+export function importFormDefinitionPackage(
+  settings: ApiSettings,
+  fragment: FormPackageFragment,
+  options: { targetFormId?: string; targetKey?: string; expectedRevision?: string; changeReason: string }
+): Promise<FormDefinition> {
+  return apiFetch(settings, "/api/v1/forms/packages/import", {
+    method: "POST",
+    body: JSON.stringify({
+      fragment,
+      target_form_id: options.targetFormId || null,
+      target_key: options.targetKey || null,
+      expected_revision: options.expectedRevision || null,
+      change_reason: options.changeReason,
+      recorded_at: new Date().toISOString()
+    })
+  });
+}

webui/src/features/forms/FormDefinitionDialog.tsx

@@ -0,0 +1,702 @@
+import { ArrowDown, ArrowUp, Eye, Languages, Plus, Trash2 } from "lucide-react";
+import { useEffect, useMemo, useState } from "react";
+import {
+  Button,
+  ConfirmDialog,
+  Dialog,
+  DocumentationHelpLink,
+  DismissibleAlert,
+  FormField as Field,
+  IconButton,
+  ToggleSwitch,
+  i18nMessage,
+  usePlatformLanguage,
+  useUnsavedChanges,
+  useUnsavedDraftGuard,
+  type ApiSettings
+} from "@govoplan/core-webui";
+import {
+  saveFormDefinition,
+  type FormDefinition,
+  type FormCondition,
+  type FormFieldDefinition,
+  type FormLocalization,
+  type FormPageDefinition,
+  type FormValueType
+} from "../../api/forms";
+import { FORMS_FIELD_DOCUMENTATION, FORMS_I18N } from "./interfacePatterns";
+
+
+const VALUE_TYPES: Array<{ value: FormValueType; label: string }> = [
+  { value: "text", label: "Text" },
+  { value: "multiline_text", label: "Long text" },
+  { value: "email", label: "Email" },
+  { value: "integer", label: "Integer" },
+  { value: "number", label: "Number" },
+  { value: "boolean", label: "Yes / no" },
+  { value: "date", label: "Date" },
+  { value: "datetime", label: "Date and time" },
+  { value: "choice", label: "Single choice" },
+  { value: "multi_choice", label: "Multiple choice" },
+  { value: "object", label: "Structured object" },
+  { value: "list", label: "Structured list" }
+];
+
+export default function FormDefinitionDialog({
+  open,
+  settings,
+  tenantId,
+  definition,
+  canPublish,
+  onClose,
+  onSaved
+}: {
+  open: boolean;
+  settings: ApiSettings;
+  tenantId: string;
+  definition: FormDefinition | null;
+  canPublish: boolean;
+  onClose: () => void;
+  onSaved: (definition: FormDefinition) => void;
+}) {
+  const { translateText } = usePlatformLanguage();
+  const [baseline, setBaseline] = useState<FormDefinition>(() => initialDraft(tenantId, definition));
+  const [draft, setDraft] = useState<FormDefinition>(baseline);
+  const [changeReason, setChangeReason] = useState("");
+  const [busy, setBusy] = useState(false);
+  const [error, setError] = useState("");
+  const [confirmLifecycle, setConfirmLifecycle] = useState(false);
+  const { requestDiscard } = useUnsavedChanges();
+
+  useEffect(() => {
+    if (!open) return;
+    const next = initialDraft(tenantId, definition);
+    setDraft(next);
+    setBaseline(next);
+    setChangeReason("");
+    setBusy(false);
+    setError("");
+    setConfirmLifecycle(false);
+  }, [definition, open, tenantId]);
+
+  const valid = useMemo(() => Boolean(
+    draft.title.trim()
+      && draft.key.trim()
+      && draft.fields.length > 0
+      && draft.fields.every((field) => field.key.trim() && field.label.trim())
+      && changeReason.trim()
+  ), [changeReason, draft]);
+  const dirty = useMemo(
+    () => Boolean(changeReason || JSON.stringify(draft) !== JSON.stringify(baseline)),
+    [baseline, changeReason, draft]
+  );
+
+  async function save(): Promise<boolean> {
+    if (!valid) return false;
+    setBusy(true);
+    setError("");
+    const revision = crypto.randomUUID();
+    const recordedAt = new Date().toISOString();
+    const payload: FormDefinition = {
+      ...draft,
+      reference: {
+        ...draft.reference,
+        version: revision
+      },
+      temporal: {
+        ...draft.temporal,
+        revision,
+        recorded_at: recordedAt,
+        superseded_at: null,
+        change_reason: changeReason.trim()
+      },
+      title: draft.title.trim(),
+      key: draft.key.trim(),
+      description: draft.description?.trim() || null,
+      fields: draft.fields.map(normalizeField),
+      policy_refs: draft.policy_refs.map((item) => item.trim()).filter(Boolean),
+      metadata: { ...draft.metadata }
+    };
+    try {
+      const saved = await saveFormDefinition(
+        settings,
+        payload,
+        definition?.reference.version
+      );
+      onSaved(saved);
+      return true;
+    } catch (reason) {
+      setError(reason instanceof Error ? reason.message : "The Form definition could not be saved.");
+      return false;
+    } finally {
+      setBusy(false);
+    }
+  }
+
+  useUnsavedDraftGuard({
+    dirty: open && dirty,
+    onSave: save,
+    onDiscard: () => {
+      setDraft(baseline);
+      setChangeReason("");
+    },
+    title: "i18n:govoplan-forms.unsaved_title",
+    message: "i18n:govoplan-forms.unsaved_message"
+  });
+
+  function requestClose() {
+    if (busy) return;
+    if (dirty) requestDiscard(onClose);
+    else onClose();
+  }
+
+  function requestSave() {
+    const previousState = definition?.publication_state ?? "draft";
+    if (draft.publication_state !== "draft" && draft.publication_state !== previousState) {
+      setConfirmLifecycle(true);
+      return;
+    }
+    void save();
+  }
+
+  function patchField(index: number, patch: Partial<FormFieldDefinition>) {
+    setDraft((current) => ({
+      ...current,
+      fields: current.fields.map((field, fieldIndex) => fieldIndex === index ? { ...field, ...patch } : field),
+      pages: patch.key && patch.key !== current.fields[index].key
+        ? remapPageField(current.pages ?? [], current.fields[index].key, patch.key)
+        : current.pages
+    }));
+  }
+
+  function moveField(index: number, delta: -1 | 1) {
+    setDraft((current) => {
+      const target = index + delta;
+      if (target < 0 || target >= current.fields.length) return current;
+      const fields = [...current.fields];
+      [fields[index], fields[target]] = [fields[target], fields[index]];
+      return { ...current, fields };
+    });
+  }
+
+  return (
+    <Dialog
+      open={open}
+      title={definition ? `Revise ${definition.title}` : "New Form definition"}
+      onClose={requestClose}
+      closeDisabled={busy}
+      portal
+      className="form-definition-dialog"
+      footer={
+        <>
+          <Button onClick={requestClose} disabled={busy} disabledReason={busy ? FORMS_I18N.busy : undefined}>Cancel</Button>
+          <Button variant="primary" onClick={requestSave} disabled={busy || !valid} disabledReason={busy ? FORMS_I18N.busy : !valid ? FORMS_I18N.incomplete : undefined}>
+            {busy ? "Saving" : "Save revision"}
+          </Button>
+        </>
+      }>
+      <div className="form-definition-editor">
+        <div className="form-definition-help"><DocumentationHelpLink reference={FORMS_FIELD_DOCUMENTATION} /></div>
+        {error && <DismissibleAlert tone="danger" resetKey={error}>{error}</DismissibleAlert>}
+        <div className="form-definition-grid">
+          <Field label="Title">
+            <input value={draft.title} disabled={busy} onChange={(event) => setDraft({ ...draft, title: event.target.value })} />
+          </Field>
+          <Field label="Key">
+            <input value={draft.key} disabled={busy || Boolean(definition)} onChange={(event) => setDraft({ ...draft, key: event.target.value })} />
+          </Field>
+          <Field label="Description" className="form-definition-wide">
+            <textarea rows={3} value={draft.description ?? ""} disabled={busy} onChange={(event) => setDraft({ ...draft, description: event.target.value })} />
+          </Field>
+          <Field label="Publication state" help={!canPublish ? FORMS_I18N.adminReason : undefined} documentation={FORMS_FIELD_DOCUMENTATION}>
+            <select value={draft.publication_state} disabled={busy} onChange={(event) => setDraft({ ...draft, publication_state: event.target.value as FormDefinition["publication_state"] })}>
+              {definition?.publication_state !== "published" && <option value="draft">Draft</option>}
+              {canPublish && <option value="published">Published</option>}
+              {canPublish && <option value="retired">Retired</option>}
+            </select>
+          </Field>
+          <Field label="Signature" documentation={FORMS_FIELD_DOCUMENTATION}>
+            <select value={draft.signature_requirement} disabled={busy} onChange={(event) => setDraft({ ...draft, signature_requirement: event.target.value as FormDefinition["signature_requirement"] })}>
+              <option value="none">Not used</option>
+              <option value="optional">Optional</option>
+              <option value="required">Required</option>
+            </select>
+          </Field>
+          <Field label="Maximum attachments">
+            <input type="number" min={0} max={1000} value={draft.max_attachments} disabled={busy} onChange={(event) => setDraft({ ...draft, max_attachments: Number(event.target.value) })} />
+          </Field>
+          <div className="form-definition-toggle">
+            <ToggleSwitch label="Draft saving" checked={draft.allow_drafts} disabled={busy} onChange={(allow_drafts) => setDraft({ ...draft, allow_drafts })} />
+          </div>
+          <Field label="Policy references" className="form-definition-wide" documentation={FORMS_FIELD_DOCUMENTATION}>
+            <input value={draft.policy_refs.join(", ")} disabled={busy} placeholder="policy:permit-intake" onChange={(event) => setDraft({ ...draft, policy_refs: splitValues(event.target.value) })} />
+          </Field>
+          <div className="form-definition-handoffs form-definition-wide">
+            <span>Permitted handoffs</span>
+            {(["case", "workflow", "record"] as const).map((kind) =>
+              <ToggleSwitch
+                key={kind}
+                label={humanize(kind)}
+                checked={draft.handoff_kinds.includes(kind)}
+                disabled={busy}
+                onChange={(checked) => setDraft({
+                  ...draft,
+                  handoff_kinds: checked
+                    ? [...draft.handoff_kinds, kind]
+                    : draft.handoff_kinds.filter((item) => item !== kind)
+                })}
+              />
+            )}
+          </div>
+          <Field label="Accessibility instructions" className="form-definition-wide" documentation={FORMS_FIELD_DOCUMENTATION}>
+            <textarea
+              rows={2}
+              value={String(draft.accessibility?.instructions ?? "")}
+              disabled={busy}
+              onChange={(event) => setDraft({
+                ...draft,
+                accessibility: patchOptionalText(draft.accessibility ?? {}, "instructions", event.target.value)
+              })}
+              placeholder="Optional instructions announced before the Form"
+            />
+          </Field>
+        </div>
+
+        <div className="form-field-editor-heading">
+          <h3>Fields</h3>
+          <Button onClick={() => setDraft(addField(draft))} disabled={busy}>
+            <Plus size={16} aria-hidden="true" />Add field
+          </Button>
+        </div>
+        <div className="form-field-editor-list">
+          {draft.fields.map((field, index) =>
+            <div className="form-field-editor-row" key={`${index}:${field.key}`}>
+              <div className="form-field-order">
+                <IconButton label={`Move ${field.label || "field"} up`} icon={<ArrowUp size={15} />} disabled={busy || index === 0} onClick={() => moveField(index, -1)} />
+                <IconButton label={`Move ${field.label || "field"} down`} icon={<ArrowDown size={15} />} disabled={busy || index === draft.fields.length - 1} onClick={() => moveField(index, 1)} />
+              </div>
+              <Field label="Key"><input value={field.key} disabled={busy} onChange={(event) => patchField(index, { key: event.target.value })} /></Field>
+              <Field label="Label"><input value={field.label} disabled={busy} onChange={(event) => patchField(index, { label: event.target.value })} /></Field>
+              <Field label="Type">
+                <select value={field.value_type} disabled={busy} onChange={(event) => patchField(index, { value_type: event.target.value as FormValueType, options: isChoice(event.target.value) ? field.options : [] })}>
+                  {VALUE_TYPES.map((type) => <option key={type.value} value={type.value}>{type.label}</option>)}
+                </select>
+              </Field>
+              <div className="form-field-required"><ToggleSwitch label="Required" checked={field.required} disabled={busy} onChange={(required) => patchField(index, { required })} /></div>
+              <Field label="Help text" className="form-field-help"><input value={field.help_text ?? ""} disabled={busy} onChange={(event) => patchField(index, { help_text: event.target.value })} /></Field>
+              {isChoice(field.value_type) &&
+                <Field label="Options" className="form-field-options"><input value={field.options.join(", ")} disabled={busy} onChange={(event) => patchField(index, { options: splitValues(event.target.value) })} /></Field>
+              }
+              <ConditionFields
+                condition={field.visibility_condition ?? null}
+                fields={draft.fields}
+                currentKey={field.key}
+                disabled={busy}
+                onChange={(visibility_condition) => patchField(index, { visibility_condition })}
+              />
+              <ConstraintFields field={field} disabled={busy} onChange={(constraints) => patchField(index, { constraints })} />
+              <IconButton
+                label={`Remove ${field.label || "field"}`}
+                icon={<Trash2 size={16} />}
+                variant="danger"
+                disabled={busy || draft.fields.length === 1}
+                disabledReason={busy ? FORMS_I18N.busy : draft.fields.length === 1 ? FORMS_I18N.oneField : undefined}
+                onClick={() => setDraft(removeField(draft, index))}
+              />
+            </div>
+          )}
+        </div>
+        <PageEditor draft={draft} disabled={busy} onChange={setDraft} />
+        <LocalizationEditor draft={draft} disabled={busy} onChange={setDraft} />
+        <DefinitionPreview definition={draft} previous={definition} />
+        <Field label="Change reason" documentation={FORMS_FIELD_DOCUMENTATION}>
+          <input value={changeReason} disabled={busy} maxLength={1000} onChange={(event) => setChangeReason(event.target.value)} placeholder="Why is this revision needed?" />
+        </Field>
+      </div>
+      <ConfirmDialog
+        open={confirmLifecycle}
+        title="i18n:govoplan-forms.lifecycle_title"
+        message={i18nMessage("i18n:govoplan-forms.lifecycle_message", { state: translateText(humanize(draft.publication_state)) })}
+        confirmLabel="Save revision"
+        tone={draft.publication_state === "retired" ? "danger" : "default"}
+        busy={busy}
+        onCancel={() => setConfirmLifecycle(false)}
+        onConfirm={() => {
+          setConfirmLifecycle(false);
+          void save();
+        }}
+      />
+    </Dialog>
+  );
+}
+
+function ConstraintFields({ field, disabled, onChange }: { field: FormFieldDefinition; disabled: boolean; onChange: (value: Record<string, unknown>) => void }) {
+  if (["text", "multiline_text", "email"].includes(field.value_type)) {
+    return (
+      <div className="form-field-constraints">
+        <Field label="Minimum length"><input type="number" min={0} value={constraintValue(field.constraints.min_length)} disabled={disabled} onChange={(event) => onChange(patchConstraint(field.constraints, "min_length", event.target.value))} /></Field>
+        <Field label="Maximum length"><input type="number" min={0} value={constraintValue(field.constraints.max_length)} disabled={disabled} onChange={(event) => onChange(patchConstraint(field.constraints, "max_length", event.target.value))} /></Field>
+        <Field label="Pattern"><input value={String(field.constraints.pattern ?? "")} disabled={disabled} onChange={(event) => onChange(patchTextConstraint(field.constraints, "pattern", event.target.value))} /></Field>
+      </div>
+    );
+  }
+  if (["integer", "number"].includes(field.value_type)) {
+    return (
+      <div className="form-field-constraints">
+        <Field label="Minimum"><input type="number" value={constraintValue(field.constraints.minimum)} disabled={disabled} onChange={(event) => onChange(patchConstraint(field.constraints, "minimum", event.target.value))} /></Field>
+        <Field label="Maximum"><input type="number" value={constraintValue(field.constraints.maximum)} disabled={disabled} onChange={(event) => onChange(patchConstraint(field.constraints, "maximum", event.target.value))} /></Field>
+      </div>
+    );
+  }
+  return null;
+}
+
+function ConditionFields({
+  condition,
+  fields,
+  currentKey,
+  disabled,
+  onChange
+}: {
+  condition: FormCondition | null;
+  fields: FormFieldDefinition[];
+  currentKey: string;
+  disabled: boolean;
+  onChange: (value: FormCondition | null) => void;
+}) {
+  const predicate = condition?.kind === "predicate" ? condition : null;
+  const candidates = fields.filter((item) => item.key !== currentKey && item.key.trim());
+  return (
+    <div className="form-field-condition">
+      <Field label="Visible when">
+        <select
+          value={predicate?.field_key ?? ""}
+          disabled={disabled || candidates.length === 0}
+          onChange={(event) => onChange(event.target.value
+            ? { kind: "predicate", field_key: event.target.value, operator: "eq", value: true }
+            : null)}>
+          <option value="">Always visible</option>
+          {candidates.map((item) => <option key={item.key} value={item.key}>{item.label || item.key}</option>)}
+        </select>
+      </Field>
+      {predicate && <>
+        <Field label="Condition">
+          <select
+            value={predicate.operator}
+            disabled={disabled}
+            onChange={(event) => onChange({
+              ...predicate,
+              operator: event.target.value as Extract<FormCondition, { kind: "predicate" }>["operator"],
+              ...(event.target.value === "is_empty" || event.target.value === "is_not_empty" ? { value: undefined } : {})
+            })}>
+            <option value="eq">Equals</option>
+            <option value="neq">Does not equal</option>
+            <option value="is_empty">Is empty</option>
+            <option value="is_not_empty">Is not empty</option>
+            <option value="contains">Contains</option>
+          </select>
+        </Field>
+        {!(["is_empty", "is_not_empty"] as string[]).includes(predicate.operator) &&
+          <Field label="Value">
+            <input
+              value={conditionInputValue(predicate.value)}
+              disabled={disabled}
+              onChange={(event) => onChange({ ...predicate, value: parseConditionValue(event.target.value, fields.find((item) => item.key === predicate.field_key)?.value_type) })}
+            />
+          </Field>
+        }
+      </>}
+    </div>
+  );
+}
+
+function PageEditor({ draft, disabled, onChange }: { draft: FormDefinition; disabled: boolean; onChange: (value: FormDefinition) => void }) {
+  const pages = draft.pages ?? [];
+  function updatePages(next: FormPageDefinition[]) {
+    onChange({ ...draft, pages: next });
+  }
+  return (
+    <section className="form-composition-section">
+      <div className="form-field-editor-heading">
+        <h3>Pages and sections</h3>
+        {pages.length === 0
+          ? <Button disabled={disabled} onClick={() => updatePages([defaultPage(draft.fields)])}><Plus size={16} aria-hidden="true" />Enable pages</Button>
+          : <Button disabled={disabled} onClick={() => updatePages([...pages, emptyPage(pages.length + 1)])}><Plus size={16} aria-hidden="true" />Add page</Button>}
+      </div>
+      {pages.length === 0 && <p className="form-section-note">Fields render in their declared order on one page.</p>}
+      {pages.map((page, pageIndex) =>
+        <div className="form-page-editor" key={`${pageIndex}:${page.key}`}>
+          <div className="form-page-editor-heading">
+            <Field label="Page key"><input value={page.key} disabled={disabled} onChange={(event) => updatePages(replaceAt(pages, pageIndex, { ...page, key: event.target.value }))} /></Field>
+            <Field label="Page title"><input value={page.title} disabled={disabled} onChange={(event) => updatePages(replaceAt(pages, pageIndex, { ...page, title: event.target.value }))} /></Field>
+            <IconButton label={`Remove page ${page.title || page.key}`} icon={<Trash2 size={16} />} variant="danger" disabled={disabled} onClick={() => updatePages(pages.filter((_, index) => index !== pageIndex))} />
+          </div>
+          {page.sections.map((section, sectionIndex) =>
+            <div className="form-section-editor" key={`${sectionIndex}:${section.key}`}>
+              <Field label="Section key"><input value={section.key} disabled={disabled} onChange={(event) => updatePages(replaceAt(pages, pageIndex, { ...page, sections: replaceAt(page.sections, sectionIndex, { ...section, key: event.target.value }) }))} /></Field>
+              <Field label="Section title"><input value={section.title} disabled={disabled} onChange={(event) => updatePages(replaceAt(pages, pageIndex, { ...page, sections: replaceAt(page.sections, sectionIndex, { ...section, title: event.target.value }) }))} /></Field>
+              <Field label="Fields">
+                <select
+                  multiple
+                  value={section.field_keys}
+                  disabled={disabled}
+                  onChange={(event) => updatePages(replaceAt(pages, pageIndex, {
+                    ...page,
+                    sections: replaceAt(page.sections, sectionIndex, {
+                      ...section,
+                      field_keys: Array.from(event.currentTarget.selectedOptions, (option) => option.value)
+                    })
+                  }))}>
+                  {draft.fields.map((field) => <option key={field.key} value={field.key}>{field.label || field.key}</option>)}
+                </select>
+              </Field>
+              <IconButton label={`Remove section ${section.title || section.key}`} icon={<Trash2 size={16} />} variant="danger" disabled={disabled || page.sections.length === 1} onClick={() => updatePages(replaceAt(pages, pageIndex, { ...page, sections: page.sections.filter((_, index) => index !== sectionIndex) }))} />
+            </div>
+          )}
+          <Button disabled={disabled} onClick={() => updatePages(replaceAt(pages, pageIndex, { ...page, sections: [...page.sections, emptySection(page.sections.length + 1)] }))}><Plus size={15} aria-hidden="true" />Add section</Button>
+        </div>
+      )}
+    </section>
+  );
+}
+
+function LocalizationEditor({ draft, disabled, onChange }: { draft: FormDefinition; disabled: boolean; onChange: (value: FormDefinition) => void }) {
+  const localizations = draft.localizations ?? [];
+  function update(items: FormLocalization[]) {
+    const fallback = items.some((item) => item.locale === draft.fallback_locale)
+      ? draft.fallback_locale
+      : items[0]?.locale ?? null;
+    onChange({ ...draft, localizations: items, fallback_locale: fallback });
+  }
+  return (
+    <section className="form-composition-section">
+      <div className="form-field-editor-heading">
+        <h3><Languages size={17} aria-hidden="true" />Localizations</h3>
+        <Button disabled={disabled} onClick={() => update([...localizations, emptyLocalization()])}><Plus size={16} aria-hidden="true" />Add locale</Button>
+      </div>
+      {localizations.length === 0 && <p className="form-section-note">The canonical labels are used for every locale.</p>}
+      {localizations.map((localization, index) =>
+        <div className="form-localization-editor" key={`${index}:${localization.locale}`}>
+          <Field label="Locale"><input value={localization.locale} disabled={disabled} placeholder="de" onChange={(event) => update(replaceAt(localizations, index, { ...localization, locale: event.target.value }))} /></Field>
+          <Field label="Localized title"><input value={localization.title ?? ""} disabled={disabled} onChange={(event) => update(replaceAt(localizations, index, { ...localization, title: event.target.value }))} /></Field>
+          <label className="form-localization-fallback"><input type="radio" checked={draft.fallback_locale === localization.locale} disabled={disabled || !localization.locale} onChange={() => onChange({ ...draft, fallback_locale: localization.locale })} />Fallback</label>
+          <IconButton label={`Remove locale ${localization.locale || index + 1}`} icon={<Trash2 size={16} />} variant="danger" disabled={disabled} onClick={() => update(localizations.filter((_, itemIndex) => itemIndex !== index))} />
+          <div className="form-localization-fields">
+            {draft.fields.map((field) =>
+              <Field key={field.key} label={`${field.label || field.key} label`}>
+                <input
+                  value={localization.field_labels[field.key] ?? ""}
+                  disabled={disabled}
+                  onChange={(event) => update(replaceAt(localizations, index, {
+                    ...localization,
+                    field_labels: patchOptionalText(localization.field_labels, field.key, event.target.value)
+                  }))}
+                />
+              </Field>
+            )}
+          </div>
+        </div>
+      )}
+    </section>
+  );
+}
+
+function DefinitionPreview({ definition, previous }: { definition: FormDefinition; previous: FormDefinition | null }) {
+  const changed = previous ? definitionChanges(previous, definition) : ["New definition"];
+  return (
+    <section className="form-composition-section form-definition-preview">
+      <div className="form-field-editor-heading"><h3><Eye size={17} aria-hidden="true" />Preview and revision changes</h3></div>
+      <div className="form-preview-grid">
+        <div>
+          <strong>{definition.title || "Untitled Form"}</strong>
+          {(definition.pages?.length ? definition.pages : [defaultPage(definition.fields)]).map((page) =>
+            <div key={page.key} className="form-preview-page">
+              <span>{page.title}</span>
+              {page.sections.map((section) => <small key={section.key}>{section.title}: {section.field_keys.join(", ") || "No fields"}</small>)}
+            </div>
+          )}
+        </div>
+        <div><strong>Changes</strong><ul>{changed.map((item) => <li key={item}>{item}</li>)}</ul></div>
+      </div>
+    </section>
+  );
+}
+
+function initialDraft(tenantId: string, definition: FormDefinition | null): FormDefinition {
+  if (definition) return structuredClone(definition);
+  const id = crypto.randomUUID();
+  const revision = crypto.randomUUID();
+  const now = new Date().toISOString();
+  return {
+    reference: { kind: "form", owner_module: "forms", object_id: id, tenant_id: tenantId, version: revision },
+    key: "",
+    temporal: { revision, recorded_at: now, change_reason: "" },
+    title: "",
+    description: "",
+    fields: [emptyField(1)],
+    publication_state: "draft",
+    allow_drafts: true,
+    max_attachments: 0,
+    signature_requirement: "none",
+    policy_refs: [],
+    handoff_kinds: [],
+    pages: [],
+    fallback_locale: null,
+    localizations: [],
+    accessibility: {},
+    metadata: {}
+  };
+}
+
+function emptyField(index: number): FormFieldDefinition {
+  return { key: `field-${index}`, label: "", value_type: "text", required: false, help_text: "", options: [], constraints: {} };
+}
+
+function normalizeField(field: FormFieldDefinition): FormFieldDefinition {
+  return {
+    ...field,
+    key: field.key.trim(),
+    label: field.label.trim(),
+    help_text: field.help_text?.trim() || null,
+    options: isChoice(field.value_type) ? field.options.map((item) => item.trim()).filter(Boolean) : [],
+    constraints: Object.fromEntries(Object.entries(field.constraints).filter(([, value]) => value !== "" && value !== null && value !== undefined))
+  };
+}
+
+function addField(definition: FormDefinition): FormDefinition {
+  const field = emptyField(definition.fields.length + 1);
+  const pages = definition.pages ?? [];
+  if (pages.length === 0) return { ...definition, fields: [...definition.fields, field] };
+  const firstPage = pages[0];
+  const firstSection = firstPage.sections[0];
+  return {
+    ...definition,
+    fields: [...definition.fields, field],
+    pages: replaceAt(pages, 0, {
+      ...firstPage,
+      sections: replaceAt(firstPage.sections, 0, {
+        ...firstSection,
+        field_keys: [...firstSection.field_keys, field.key]
+      })
+    })
+  };
+}
+
+function removeField(definition: FormDefinition, index: number): FormDefinition {
+  const key = definition.fields[index].key;
+  return {
+    ...definition,
+    fields: definition.fields.filter((_, fieldIndex) => fieldIndex !== index),
+    pages: (definition.pages ?? []).map((page) => ({
+      ...page,
+      sections: page.sections.map((section) => ({
+        ...section,
+        field_keys: section.field_keys.filter((fieldKey) => fieldKey !== key)
+      }))
+    }))
+  };
+}
+
+function remapPageField(pages: FormPageDefinition[], previous: string, next: string): FormPageDefinition[] {
+  return pages.map((page) => ({
+    ...page,
+    sections: page.sections.map((section) => ({
+      ...section,
+      field_keys: section.field_keys.map((key) => key === previous ? next : key)
+    }))
+  }));
+}
+
+function defaultPage(fields: FormFieldDefinition[]): FormPageDefinition {
+  return {
+    key: "page-1",
+    title: "Form",
+    sections: [{ key: "section-1", title: "Details", field_keys: fields.map((item) => item.key) }]
+  };
+}
+
+function emptyPage(index: number): FormPageDefinition {
+  return { key: `page-${index}`, title: `Page ${index}`, sections: [emptySection(1)] };
+}
+
+function emptySection(index: number) {
+  return { key: `section-${index}`, title: `Section ${index}`, field_keys: [] as string[] };
+}
+
+function emptyLocalization(): FormLocalization {
+  return {
+    locale: "",
+    title: "",
+    description: "",
+    field_labels: {},
+    field_help_texts: {},
+    option_labels: {},
+    page_titles: {},
+    section_titles: {}
+  };
+}
+
+function replaceAt<T>(items: T[], index: number, value: T): T[] {
+  return items.map((item, itemIndex) => itemIndex === index ? value : item);
+}
+
+function patchOptionalText<T extends Record<string, unknown>>(current: T, key: string, value: string): T {
+  const next = { ...current };
+  if (value.trim()) next[key as keyof T] = value as T[keyof T];
+  else delete next[key as keyof T];
+  return next;
+}
+
+function conditionInputValue(value: unknown): string {
+  if (typeof value === "string") return value;
+  if (value === undefined || value === null) return "";
+  return JSON.stringify(value);
+}
+
+function parseConditionValue(value: string, type?: FormValueType): unknown {
+  if (type === "boolean") return value.trim().toLowerCase() === "true";
+  if (type === "integer") return Number.parseInt(value, 10);
+  if (type === "number") return Number(value);
+  return value;
+}
+
+function definitionChanges(previous: FormDefinition, current: FormDefinition): string[] {
+  const changes: string[] = [];
+  if (previous.title !== current.title) changes.push("Title changed");
+  if (previous.publication_state !== current.publication_state) changes.push(`State: ${previous.publication_state} -> ${current.publication_state}`);
+  if (previous.fields.length !== current.fields.length) changes.push(`Fields: ${previous.fields.length} -> ${current.fields.length}`);
+  if ((previous.pages?.length ?? 0) !== (current.pages?.length ?? 0)) changes.push(`Pages: ${previous.pages?.length ?? 0} -> ${current.pages?.length ?? 0}`);
+  if ((previous.localizations?.length ?? 0) !== (current.localizations?.length ?? 0)) changes.push(`Locales: ${previous.localizations?.length ?? 0} -> ${current.localizations?.length ?? 0}`);
+  if (changes.length === 0 && JSON.stringify(previous) !== JSON.stringify(current)) changes.push("Definition details changed");
+  return changes.length ? changes : ["No unsaved changes"];
+}
+
+function splitValues(value: string): string[] {
+  return value.split(",").map((item) => item.trim()).filter(Boolean);
+}
+
+function isChoice(value: string): boolean {
+  return value === "choice" || value === "multi_choice";
+}
+
+function patchConstraint(current: Record<string, unknown>, key: string, value: string): Record<string, unknown> {
+  const next = { ...current };
+  if (!value.trim()) delete next[key];
+  else next[key] = Number(value);
+  return next;
+}
+
+function patchTextConstraint(current: Record<string, unknown>, key: string, value: string): Record<string, unknown> {
+  const next = { ...current };
+  if (!value) delete next[key];
+  else next[key] = value;
+  return next;
+}
+
+function constraintValue(value: unknown): number | "" {
+  return typeof value === "number" ? value : "";
+}
+
+function humanize(value: string): string {
+  return value.replace(/[_:.-]+/g, " ").replace(/\b\w/g, (letter) => letter.toUpperCase());
+}

webui/src/features/forms/FormsPage.tsx

@@ -0,0 +1,231 @@
+import { Download, Pencil, Plus, RefreshCw, Search, Upload } from "lucide-react";
+import { useCallback, useEffect, useRef, useState, type FormEvent } from "react";
+import {
+  ActionBlockerHint,
+  Button,
+  Dialog,
+  DocumentationHelpLink,
+  DismissibleAlert,
+  IconButton,
+  FormField,
+  LoadingIndicator,
+  PageScrollViewport,
+  StatusBadge,
+  hasScope,
+  useUnsavedChanges,
+  useUnsavedDraftGuard,
+  type PlatformRouteContext
+} from "@govoplan/core-webui";
+import {
+  assessFormDefinitionPackage,
+  exportFormDefinitionPackage,
+  importFormDefinitionPackage,
+  listFormDefinitions,
+  type FormDefinition,
+  type FormPackageFragment
+} from "../../api/forms";
+import FormDefinitionDialog from "./FormDefinitionDialog";
+import { FORMS_DOCUMENTATION, FORMS_FIELD_DOCUMENTATION, FORMS_I18N } from "./interfacePatterns";
+
+
+export default function FormsPage({ settings, auth }: PlatformRouteContext) {
+  const [query, setQuery] = useState("");
+  const [submittedQuery, setSubmittedQuery] = useState("");
+  const [state, setState] = useState("");
+  const [items, setItems] = useState<FormDefinition[]>([]);
+  const [total, setTotal] = useState(0);
+  const [editing, setEditing] = useState<FormDefinition | "new" | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState("");
+  const [importing, setImporting] = useState<FormPackageFragment | null>(null);
+  const [importReason, setImportReason] = useState("");
+  const [importAssessment, setImportAssessment] = useState("");
+  const [importBusy, setImportBusy] = useState(false);
+  const { requestDiscard } = useUnsavedChanges();
+  const importInput = useRef<HTMLInputElement>(null);
+  const canWrite = hasScope(auth, "forms:definition:write");
+  const canAdmin = hasScope(auth, "forms:definition:admin");
+  const tenantId = auth.active_tenant?.id ?? auth.tenant.id;
+
+  const load = useCallback((signal?: AbortSignal) => {
+    setLoading(true);
+    setError("");
+    return listFormDefinitions(settings, {
+      query: submittedQuery,
+      states: state ? [state] : undefined,
+      limit: 200
+    }, signal).
+      then((result) => {
+        setItems(result.definitions);
+        setTotal(result.total);
+      }).
+      finally(() => setLoading(false));
+  }, [settings, state, submittedQuery]);
+
+  useEffect(() => {
+    const controller = new AbortController();
+    load(controller.signal).catch((reason) => {
+      if ((reason as Error).name !== "AbortError") {
+        setError(reason instanceof Error ? reason.message : "Form definitions could not be loaded.");
+      }
+    });
+    return () => controller.abort();
+  }, [load]);
+
+  function search(event: FormEvent) {
+    event.preventDefault();
+    setSubmittedQuery(query.trim());
+  }
+
+  async function choosePackage(file?: File) {
+    if (!file) return;
+    setError("");
+    try {
+      const fragment = JSON.parse(await file.text()) as FormPackageFragment;
+      const assessment = await assessFormDefinitionPackage(settings, fragment);
+      setImporting(fragment);
+      setImportAssessment(assessment.outcome);
+      setImportReason("");
+    } catch (reason) {
+      setError(reason instanceof Error ? reason.message : "The Form package could not be read.");
+    } finally {
+      if (importInput.current) importInput.current.value = "";
+    }
+  }
+
+  async function importPackage(): Promise<boolean> {
+    if (!importing || !importReason.trim()) return false;
+    setImportBusy(true);
+    setError("");
+    try {
+      await importFormDefinitionPackage(settings, importing, { changeReason: importReason.trim() });
+      setImporting(null);
+      await load();
+      return true;
+    } catch (reason) {
+      setError(reason instanceof Error ? reason.message : "The Form package could not be imported.");
+      return false;
+    } finally {
+      setImportBusy(false);
+    }
+  }
+
+  useUnsavedDraftGuard({
+    dirty: Boolean(importing && importReason),
+    onSave: importPackage,
+    onDiscard: () => {
+      setImporting(null);
+      setImportReason("");
+    },
+    title: "i18n:govoplan-forms.unsaved_title",
+    message: "i18n:govoplan-forms.unsaved_message"
+  });
+
+  function closeImport() {
+    if (importBusy) return;
+    if (importing && importReason) requestDiscard(() => setImporting(null));
+    else setImporting(null);
+  }
+
+  async function downloadPackage(item: FormDefinition) {
+    setError("");
+    try {
+      const fragment = await exportFormDefinitionPackage(settings, item.reference.object_id, item.reference.version);
+      const href = URL.createObjectURL(new Blob([JSON.stringify(fragment, null, 2)], { type: "application/json" }));
+      const anchor = document.createElement("a");
+      anchor.href = href;
+      anchor.download = `${item.key}-${item.reference.version}.govoplan-form.json`;
+      anchor.click();
+      URL.revokeObjectURL(href);
+    } catch (reason) {
+      setError(reason instanceof Error ? reason.message : "The Form package could not be exported.");
+    }
+  }
+
+  return (
+    <main className="forms-page">
+      <div className="forms-shell">
+        <div className="forms-toolbar">
+          <form onSubmit={search} className="forms-search">
+            <Search size={17} aria-hidden="true" />
+            <input value={query} onChange={(event) => setQuery(event.target.value)} placeholder="Search definitions" aria-label="Search Form definitions" />
+            <Button type="submit">Search</Button>
+          </form>
+          <label>
+            <span>State</span>
+            <select value={state} onChange={(event) => setState(event.target.value)}>
+              <option value="">All</option>
+              <option value="draft">Draft</option>
+              <option value="published">Published</option>
+              <option value="retired">Retired</option>
+            </select>
+          </label>
+          <IconButton label="Refresh definitions" icon={<RefreshCw size={16} />} onClick={() => void load()} disabled={loading} disabledReason={loading ? FORMS_I18N.loading : undefined} />
+          <IconButton label="Import Form package" icon={<Upload size={16} />} onClick={() => importInput.current?.click()} disabled={loading || !canWrite} disabledReason={loading ? FORMS_I18N.loading : !canWrite ? FORMS_I18N.writeReason : undefined} />
+          <input ref={importInput} className="forms-hidden-input" type="file" accept="application/json,.json" onChange={(event) => void choosePackage(event.target.files?.[0])} />
+          <Button variant="primary" disabled={!canWrite} disabledReason={!canWrite ? FORMS_I18N.writeReason : undefined} onClick={() => setEditing("new")}><Plus size={16} aria-hidden="true" />New definition</Button>
+          <span className="forms-count">{total}</span>
+          <DocumentationHelpLink reference={FORMS_DOCUMENTATION} />
+        </div>
+        <PageScrollViewport className="forms-list-viewport">
+          {error && <DismissibleAlert tone="danger" resetKey={error}>{error}</DismissibleAlert>}
+          {!canWrite && <ActionBlockerHint tone="info" reason={{ summary: "No Form management permission", details: FORMS_I18N.writeReason, requiredAction: FORMS_I18N.permissionAction, actor: FORMS_I18N.permissionActor, target: FORMS_I18N.permissionDestination }} labels={{ requiredAction: FORMS_I18N.requiredAction, actor: FORMS_I18N.actor, target: FORMS_I18N.destination }} documentation={FORMS_DOCUMENTATION} />}
+          {loading && <LoadingIndicator label="Loading Form definitions" />}
+          {!loading && !error && items.length === 0 && <div className="forms-empty">No matching definitions.</div>}
+          {!loading && items.length > 0 &&
+            <div className="forms-list" role="list">
+              {items.map((item) => {
+                const mayRevise = canWrite && (item.publication_state === "draft" || canAdmin) && item.publication_state !== "retired";
+                return (
+                  <div className="forms-row" role="listitem" key={item.reference.object_id}>
+                    <span><strong>{item.title}</strong><small>{item.key}</small></span>
+                    <span>{item.fields.length} fields</span>
+                    <span>Revision {item.reference.version}</span>
+                    <StatusBadge status={item.publication_state === "published" ? "active" : "inactive"} label={humanize(item.publication_state)} />
+                    <span className="forms-row-actions">
+                      <IconButton label={`Export ${item.title}`} icon={<Download size={16} />} onClick={() => void downloadPackage(item)} />
+                      <IconButton label={`Revise ${item.title}`} icon={<Pencil size={16} />} disabled={!mayRevise} disabledReason={!canWrite ? FORMS_I18N.writeReason : item.publication_state === "retired" || (item.publication_state === "published" && !canAdmin) ? FORMS_I18N.lifecycleReason : undefined} onClick={() => setEditing(item)} />
+                    </span>
+                  </div>
+                );
+              })}
+            </div>
+          }
+        </PageScrollViewport>
+      </div>
+      {editing &&
+        <FormDefinitionDialog
+          open
+          settings={settings}
+          tenantId={tenantId}
+          definition={editing === "new" ? null : editing}
+          canPublish={canAdmin}
+          onClose={() => setEditing(null)}
+          onSaved={() => {
+            setEditing(null);
+            void load().catch((reason) => setError(reason instanceof Error ? reason.message : "Definitions could not be reloaded."));
+          }}
+        />
+      }
+      <Dialog
+        open={Boolean(importing)}
+        title="Import Form package"
+        onClose={closeImport}
+        closeDisabled={importBusy}
+        portal
+        footer={<>
+          <Button onClick={closeImport} disabled={importBusy} disabledReason={importBusy ? FORMS_I18N.busy : undefined}>Cancel</Button>
+          <Button variant="primary" onClick={() => void importPackage()} disabled={importBusy || !importReason.trim()} disabledReason={importBusy ? FORMS_I18N.busy : !importReason.trim() ? FORMS_I18N.incomplete : undefined}>{importBusy ? "Importing" : "Import as draft"}</Button>
+        </>}>
+        <div className="forms-package-import">
+          <p>Assessment: <strong>{humanize(importAssessment)}</strong>. The source revision is retained as provenance and imported as a new local draft.</p>
+          <FormField label="Change reason" documentation={FORMS_FIELD_DOCUMENTATION}><input value={importReason} maxLength={1000} disabled={importBusy} onChange={(event) => setImportReason(event.target.value)} /></FormField>
+        </div>
+      </Dialog>
+    </main>
+  );
+}
+
+function humanize(value: string): string {
+  return value.replace(/[_:.-]+/g, " ").replace(/\b\w/g, (letter) => letter.toUpperCase());
+}

webui/src/features/forms/interfacePatterns.ts

@@ -0,0 +1,27 @@
+import type { DocumentationHelpReference } from "@govoplan/core-webui";
+
+export const FORMS_DOCUMENTATION = {
+  topicId: "forms.definitions",
+  documentationType: "user"
+} satisfies DocumentationHelpReference;
+
+export const FORMS_FIELD_DOCUMENTATION = {
+  topicId: "forms.reference.fields-and-consequences",
+  documentationType: "admin"
+} satisfies DocumentationHelpReference;
+
+export const FORMS_I18N = {
+  loading: "i18n:govoplan-forms.loading_reason",
+  busy: "i18n:govoplan-forms.busy_reason",
+  writeReason: "i18n:govoplan-forms.write_permission_reason",
+  adminReason: "i18n:govoplan-forms.admin_permission_reason",
+  lifecycleReason: "i18n:govoplan-forms.lifecycle_reason",
+  incomplete: "i18n:govoplan-forms.incomplete_reason",
+  oneField: "i18n:govoplan-forms.one_field_reason",
+  requiredAction: "i18n:govoplan-forms.required_action",
+  actor: "i18n:govoplan-forms.responsible_actor",
+  destination: "i18n:govoplan-forms.destination",
+  permissionAction: "i18n:govoplan-forms.permission_action",
+  permissionActor: "i18n:govoplan-forms.permission_actor",
+  permissionDestination: "i18n:govoplan-forms.permission_destination"
+} as const;

webui/src/i18n/generatedTranslations.ts

@@ -0,0 +1,149 @@
+import type { PlatformTranslations } from "@govoplan/core-webui";
+
+const en = {
+  "i18n:govoplan-forms.form_definitions": "Form definitions",
+  "i18n:govoplan-forms.loading_reason": "Form definitions are still loading.",
+  "i18n:govoplan-forms.busy_reason": "Another Form definition action is still running.",
+  "i18n:govoplan-forms.write_permission_reason": "Your account may not create, import, or revise Form definitions.",
+  "i18n:govoplan-forms.admin_permission_reason": "Publishing and retirement require Form administration permission.",
+  "i18n:govoplan-forms.lifecycle_reason": "Retired definitions cannot be revised; published definitions require administrative authority.",
+  "i18n:govoplan-forms.incomplete_reason": "Complete the title, key, fields, and change reason first.",
+  "i18n:govoplan-forms.one_field_reason": "A Form definition must retain at least one field.",
+  "i18n:govoplan-forms.required_action": "Required action",
+  "i18n:govoplan-forms.responsible_actor": "Responsible actor",
+  "i18n:govoplan-forms.destination": "Destination",
+  "i18n:govoplan-forms.permission_action": "Ask for the corresponding Form definition permission.",
+  "i18n:govoplan-forms.permission_actor": "An Access or tenant administrator",
+  "i18n:govoplan-forms.permission_destination": "Access role assignments",
+  "i18n:govoplan-forms.unsaved_title": "Unsaved Form definition",
+  "i18n:govoplan-forms.unsaved_message": "Save or discard the Form definition draft before leaving this surface.",
+  "i18n:govoplan-forms.lifecycle_title": "Confirm definition lifecycle",
+  "i18n:govoplan-forms.lifecycle_message": "Save this revision as {state}? Existing submissions keep their exact definition revision.",
+  "Form definitions": "Form definitions",
+  "Search definitions": "Search definitions",
+  "Search Form definitions": "Search Form definitions",
+  "Search": "Search",
+  "State": "State",
+  "All": "All",
+  "Draft": "Draft",
+  "Published": "Published",
+  "Retired": "Retired",
+  "Refresh definitions": "Refresh definitions",
+  "Import Form package": "Import Form package",
+  "New definition": "New definition",
+  "Loading Form definitions": "Loading Form definitions",
+  "No matching definitions.": "No matching definitions.",
+  "Assessment": "Assessment",
+  "Cancel": "Cancel",
+  "Importing": "Importing",
+  "Import as draft": "Import as draft",
+  "Change reason": "Change reason",
+  "New Form definition": "New Form definition",
+  "Saving": "Saving",
+  "Save revision": "Save revision",
+  "Title": "Title",
+  "Key": "Key",
+  "Description": "Description",
+  "Publication state": "Publication state",
+  "Signature": "Signature",
+  "Not used": "Not used",
+  "Optional": "Optional",
+  "Required": "Required",
+  "Maximum attachments": "Maximum attachments",
+  "Draft saving": "Draft saving",
+  "Policy references": "Policy references",
+  "Permitted handoffs": "Permitted handoffs",
+  "Case": "Case",
+  "Workflow": "Workflow",
+  "Record": "Record",
+  "Accessibility instructions": "Accessibility instructions",
+  "Fields": "Fields",
+  "Add field": "Add field",
+  "Label": "Label",
+  "Type": "Type",
+  "Help text": "Help text",
+  "Options": "Options",
+  "Pages and sections": "Pages and sections",
+  "Enable pages": "Enable pages",
+  "Add page": "Add page",
+  "Add section": "Add section",
+  "Localizations": "Localizations",
+  "Add locale": "Add locale",
+  "Preview and revision changes": "Preview and revision changes",
+  "No Form management permission": "No Form management permission"
+} as const;
+
+const de: Record<keyof typeof en, string> = {
+  "i18n:govoplan-forms.form_definitions": "Formulardefinitionen",
+  "i18n:govoplan-forms.loading_reason": "Formulardefinitionen werden noch geladen.",
+  "i18n:govoplan-forms.busy_reason": "Eine andere Aktion für Formulardefinitionen läuft noch.",
+  "i18n:govoplan-forms.write_permission_reason": "Ihr Konto darf Formulardefinitionen nicht erstellen, importieren oder überarbeiten.",
+  "i18n:govoplan-forms.admin_permission_reason": "Veröffentlichung und Stilllegung erfordern die Formularadministration.",
+  "i18n:govoplan-forms.lifecycle_reason": "Stillgelegte Definitionen können nicht überarbeitet werden; veröffentlichte Definitionen erfordern administrative Berechtigung.",
+  "i18n:govoplan-forms.incomplete_reason": "Füllen Sie zuerst Titel, Schlüssel, Felder und Änderungsgrund aus.",
+  "i18n:govoplan-forms.one_field_reason": "Eine Formulardefinition muss mindestens ein Feld behalten.",
+  "i18n:govoplan-forms.required_action": "Erforderliche Aktion",
+  "i18n:govoplan-forms.responsible_actor": "Verantwortliche Stelle",
+  "i18n:govoplan-forms.destination": "Ziel",
+  "i18n:govoplan-forms.permission_action": "Fordern Sie die entsprechende Berechtigung für Formulardefinitionen an.",
+  "i18n:govoplan-forms.permission_actor": "Eine Zugriffs- oder Mandantenadministration",
+  "i18n:govoplan-forms.permission_destination": "Zugriff und Rollenzuweisungen",
+  "i18n:govoplan-forms.unsaved_title": "Ungespeicherte Formulardefinition",
+  "i18n:govoplan-forms.unsaved_message": "Speichern oder verwerfen Sie den Entwurf der Formulardefinition, bevor Sie diese Oberfläche verlassen.",
+  "i18n:govoplan-forms.lifecycle_title": "Definitionslebenszyklus bestätigen",
+  "i18n:govoplan-forms.lifecycle_message": "Diese Revision als {state} speichern? Bestehende Einreichungen behalten ihre exakte Definitionsrevision.",
+  "Form definitions": "Formulardefinitionen",
+  "Search definitions": "Definitionen suchen",
+  "Search Form definitions": "Formulardefinitionen durchsuchen",
+  "Search": "Suchen",
+  "State": "Status",
+  "All": "Alle",
+  "Draft": "Entwurf",
+  "Published": "Veröffentlicht",
+  "Retired": "Stillgelegt",
+  "Refresh definitions": "Definitionen aktualisieren",
+  "Import Form package": "Formularpaket importieren",
+  "New definition": "Neue Definition",
+  "Loading Form definitions": "Formulardefinitionen werden geladen",
+  "No matching definitions.": "Keine passenden Definitionen.",
+  "Assessment": "Bewertung",
+  "Cancel": "Abbrechen",
+  "Importing": "Importieren",
+  "Import as draft": "Als Entwurf importieren",
+  "Change reason": "Änderungsgrund",
+  "New Form definition": "Neue Formulardefinition",
+  "Saving": "Speichern",
+  "Save revision": "Revision speichern",
+  "Title": "Titel",
+  "Key": "Schlüssel",
+  "Description": "Beschreibung",
+  "Publication state": "Veröffentlichungsstatus",
+  "Signature": "Signatur",
+  "Not used": "Nicht verwendet",
+  "Optional": "Optional",
+  "Required": "Erforderlich",
+  "Maximum attachments": "Maximale Anhänge",
+  "Draft saving": "Entwurfsspeicherung",
+  "Policy references": "Richtlinienreferenzen",
+  "Permitted handoffs": "Zulässige Übergaben",
+  "Case": "Fall",
+  "Workflow": "Workflow",
+  "Record": "Datensatz",
+  "Accessibility instructions": "Hinweise zur Barrierefreiheit",
+  "Fields": "Felder",
+  "Add field": "Feld hinzufügen",
+  "Label": "Bezeichnung",
+  "Type": "Typ",
+  "Help text": "Hilfetext",
+  "Options": "Optionen",
+  "Pages and sections": "Seiten und Abschnitte",
+  "Enable pages": "Seiten aktivieren",
+  "Add page": "Seite hinzufügen",
+  "Add section": "Abschnitt hinzufügen",
+  "Localizations": "Lokalisierungen",
+  "Add locale": "Sprache hinzufügen",
+  "Preview and revision changes": "Vorschau und Revisionsänderungen",
+  "No Form management permission": "Keine Berechtigung zur Formularverwaltung"
+};
+
+export const generatedTranslations: PlatformTranslations = { en, de };

webui/src/index.ts

@@ -0,0 +1,2 @@
+export { default, formsModule } from "./module";
+export * from "./api/forms";

webui/src/module.ts

@@ -0,0 +1,41 @@
+import { createElement, lazy } from "react";
+import type { PlatformWebModule } from "@govoplan/core-webui";
+import { generatedTranslations } from "./i18n/generatedTranslations";
+import "./styles/forms.css";
+
+
+const FormsPage = lazy(() => import("./features/forms/FormsPage"));
+
+export const formsModule: PlatformWebModule = {
+  id: "forms",
+  label: "i18n:govoplan-forms.form_definitions",
+  version: "0.1.14",
+  dependencies: ["access"],
+  optionalDependencies: ["forms_runtime", "portal", "workflow_engine", "cases", "policy"],
+  translations: generatedTranslations,
+  routes: [
+    {
+      path: "/forms",
+      anyOf: ["forms:definition:read"],
+      order: 36,
+      surfaceId: "forms.catalogue",
+      render: (context) => createElement(FormsPage, context)
+    }
+  ],
+  navItems: [
+    {
+      to: "/forms",
+      label: "i18n:govoplan-forms.form_definitions",
+      iconName: "list-tree",
+      anyOf: ["forms:definition:read"],
+      order: 36,
+      surfaceId: "forms.navigation"
+    }
+  ],
+  viewSurfaces: [
+    { id: "forms.navigation", moduleId: "forms", kind: "navigation", label: "Form definitions navigation", order: 10 },
+    { id: "forms.catalogue", moduleId: "forms", kind: "route", label: "Form definition catalogue", order: 20 }
+  ]
+};
+
+export default formsModule;

webui/src/styles/forms.css

@@ -0,0 +1,391 @@
+.forms-page,
+.forms-shell {
+  height: 100%;
+  min-height: 0;
+  overflow: hidden;
+}
+
+.forms-shell {
+  display: flex;
+  flex-direction: column;
+  background: var(--surface);
+}
+
+.forms-toolbar {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  min-height: 58px;
+  padding: 10px 18px;
+  border-bottom: 1px solid var(--border);
+  background: var(--surface-raised);
+}
+
+.forms-search {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  width: min(520px, 100%);
+  margin-right: auto;
+}
+
+.forms-search input {
+  min-width: 120px;
+  flex: 1;
+}
+
+.forms-toolbar > label {
+  display: flex;
+  align-items: center;
+  gap: 7px;
+}
+
+.forms-toolbar > label > span,
+.forms-count {
+  color: var(--text-soft);
+  font-size: 0.82rem;
+}
+
+.forms-list-viewport {
+  flex: 1;
+  min-height: 0;
+  padding: 16px 18px 24px;
+}
+
+.forms-list-viewport > .action-blocker-hint {
+  margin-bottom: 16px;
+}
+
+.forms-list {
+  overflow: hidden;
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  background: var(--surface-raised);
+}
+
+.forms-row {
+  display: grid;
+  grid-template-columns: minmax(260px, 1fr) minmax(90px, auto) minmax(120px, auto) auto auto;
+  align-items: center;
+  gap: 14px;
+  min-height: 64px;
+  padding: 9px 12px;
+  border-bottom: 1px solid var(--border);
+}
+
+.forms-row:last-child {
+  border-bottom: 0;
+}
+
+.forms-row:hover {
+  background: var(--hover-bg);
+}
+
+.forms-row > span:first-child {
+  display: flex;
+  min-width: 0;
+  flex-direction: column;
+  gap: 3px;
+}
+
+.forms-row > span:first-child strong,
+.forms-row > span:first-child small {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.forms-row > span:not(:first-child, .status-badge),
+.forms-row small {
+  color: var(--text-soft);
+  font-size: 0.8rem;
+}
+
+.forms-row-actions {
+  display: flex;
+  align-items: center;
+  gap: 4px;
+}
+
+.forms-hidden-input {
+  display: none;
+}
+
+.forms-package-import {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+}
+
+.forms-package-import p {
+  margin: 0;
+  color: var(--text-soft);
+}
+
+.forms-empty {
+  padding: 36px 0;
+  color: var(--text-soft);
+  text-align: center;
+}
+
+.form-definition-dialog {
+  width: min(1120px, calc(100vw - 32px));
+  height: min(860px, calc(100vh - 32px));
+}
+
+.form-definition-editor {
+  display: flex;
+  min-height: 0;
+  flex-direction: column;
+  gap: 18px;
+}
+
+.form-definition-help {
+  display: flex;
+  justify-content: flex-end;
+}
+
+.form-definition-grid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 12px 16px;
+}
+
+.form-definition-wide {
+  grid-column: 1 / -1;
+}
+
+.form-definition-toggle {
+  display: flex;
+  align-items: end;
+  min-height: 58px;
+}
+
+.form-definition-handoffs {
+  display: flex;
+  align-items: center;
+  flex-wrap: wrap;
+  gap: 10px 18px;
+  padding: 10px 0;
+  border-top: 1px solid var(--border);
+  border-bottom: 1px solid var(--border);
+}
+
+.form-definition-handoffs > span {
+  margin-right: auto;
+  font-size: 0.84rem;
+  font-weight: 600;
+}
+
+.form-field-editor-heading {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+}
+
+.form-field-editor-heading h3 {
+  margin: 0;
+  font-size: 0.98rem;
+  letter-spacing: 0;
+}
+
+.form-field-editor-list {
+  border-top: 1px solid var(--border);
+}
+
+.form-field-editor-row {
+  display: grid;
+  grid-template-columns: 36px minmax(120px, 0.8fr) minmax(160px, 1.1fr) minmax(130px, 0.8fr) minmax(100px, auto) 36px;
+  align-items: end;
+  gap: 9px;
+  padding: 12px 0;
+  border-bottom: 1px solid var(--border);
+}
+
+.form-field-order {
+  display: flex;
+  align-self: stretch;
+  flex-direction: column;
+  justify-content: center;
+  gap: 3px;
+}
+
+.form-field-order .icon-button {
+  width: 32px;
+  height: 32px;
+}
+
+.form-field-required {
+  display: flex;
+  align-items: center;
+  min-height: 38px;
+}
+
+.form-field-help,
+.form-field-options,
+.form-field-constraints,
+.form-field-condition {
+  grid-column: 2 / -1;
+}
+
+.form-field-constraints,
+.form-field-condition {
+  display: grid;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  gap: 9px;
+}
+
+.form-composition-section {
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+  padding-top: 4px;
+  border-top: 1px solid var(--border);
+}
+
+.form-field-editor-heading h3 {
+  display: inline-flex;
+  align-items: center;
+  gap: 7px;
+}
+
+.form-section-note {
+  margin: 0;
+  color: var(--text-soft);
+  font-size: 0.84rem;
+}
+
+.form-page-editor,
+.form-localization-editor {
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+  padding: 12px 0;
+  border-bottom: 1px solid var(--border);
+}
+
+.form-page-editor-heading,
+.form-section-editor,
+.form-localization-editor {
+  display: grid;
+  grid-template-columns: minmax(130px, 0.7fr) minmax(180px, 1fr) auto;
+  align-items: end;
+  gap: 9px;
+}
+
+.form-section-editor {
+  grid-template-columns: minmax(120px, 0.7fr) minmax(160px, 1fr) minmax(220px, 1.5fr) auto;
+  padding-left: 18px;
+}
+
+.form-section-editor select[multiple] {
+  min-height: 84px;
+}
+
+.form-localization-editor {
+  grid-template-columns: minmax(100px, 0.5fr) minmax(200px, 1fr) auto auto;
+}
+
+.form-localization-fallback {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  min-height: 38px;
+}
+
+.form-localization-fields {
+  display: grid;
+  grid-column: 1 / -1;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 9px;
+}
+
+.form-preview-grid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 18px;
+}
+
+.form-preview-grid > div {
+  min-width: 0;
+}
+
+.form-preview-grid ul {
+  margin: 7px 0 0;
+  padding-left: 18px;
+}
+
+.form-preview-page {
+  display: flex;
+  flex-direction: column;
+  gap: 3px;
+  margin-top: 8px;
+}
+
+.form-preview-page small {
+  color: var(--text-soft);
+}
+
+@media (max-width: 900px) {
+  .forms-toolbar {
+    align-items: stretch;
+    flex-wrap: wrap;
+  }
+
+  .forms-search {
+    width: 100%;
+  }
+
+  .forms-row {
+    grid-template-columns: minmax(0, 1fr) auto auto;
+  }
+
+  .forms-row > span:nth-child(2),
+  .forms-row > span:nth-child(3) {
+    display: none;
+  }
+
+  .form-field-editor-row {
+    grid-template-columns: 36px minmax(0, 1fr) 36px;
+  }
+
+  .form-field-editor-row > .form-field {
+    grid-column: 2;
+  }
+
+  .form-field-order {
+    grid-column: 1;
+    grid-row: 1 / span 4;
+  }
+
+  .form-field-required,
+  .form-field-help,
+  .form-field-options,
+  .form-field-constraints,
+  .form-field-condition {
+    grid-column: 2;
+  }
+
+  .form-field-editor-row > .icon-button:last-child {
+    grid-column: 3;
+    grid-row: 1;
+  }
+}
+
+@media (max-width: 620px) {
+  .form-definition-grid,
+  .form-field-constraints,
+  .form-field-condition,
+  .form-page-editor-heading,
+  .form-section-editor,
+  .form-localization-editor,
+  .form-localization-fields,
+  .form-preview-grid {
+    grid-template-columns: 1fr;
+  }
+
+  .form-definition-wide {
+    grid-column: auto;
+  }
+}