Release v0.1.18

.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

AGENTS.md

@@ -0,0 +1,16 @@
+# GovOPlaN IDM Codex Guide
+
+## Scope
+
+This repository owns identity-to-organization function assignments, governed request/grant workflows, effective dates, and external directory reconciliation.
+
+## Documentation Contract
+
+- Treat documentation as part of every behavior change. Update this module's manifest-driven `DocumentationTopic` contributions for affected user and administrator behavior.
+- Keep feature content here; `govoplan-docs` projects it without importing IDM internals.
+- Maintain a static user/admin baseline and run `/mnt/DATA/git/govoplan/tools/checks/check-manifest-shapes.py` after behavior or manifest changes.
+
+## Boundaries
+
+- Identity owns people; Organizations owns structures and functions; Access maps resulting facts to authority.
+- Preserve effective dates, provenance, approval evidence, and reconciliation state.

README.md

@@ -20,6 +20,7 @@ vendor or protocol.
 - inbound synchronization from external identity-management systems
 - identity lifecycle import, update, disable, and reconciliation jobs
 - identity-to-organization-function assignment links inside GovOPlaN
+- typed business groups and effective-dated identity relationship links
 - bridge views that combine identity and organization facts, such as identity
   candidates for organization function assignments
 - mapping external identities, accounts, groups, organizational units,
@@ -73,6 +74,12 @@ assignment links:
 - `GET /api/v1/idm/organization-function-assignments`
 - `POST /api/v1/idm/organization-function-assignments`
 - `PATCH /api/v1/idm/organization-function-assignments/{assignment_id}`
+- `GET|POST /api/v1/idm/typed-groups`
+- `PATCH /api/v1/idm/typed-groups/{group_id}`
+- `GET|POST /api/v1/idm/relationships`
+- `PATCH /api/v1/idm/relationships/{relationship_id}`
+- `POST /api/v1/idm/relationships/{relationship_id}/revoke`
+- `GET /api/v1/idm/typed-groups/{group_id}/memberships`
 
 The candidate endpoint returns searchable identity/account candidates for IDM
 assignment forms. Assignment writes validate the identity/account link through
@@ -84,6 +91,10 @@ planning.
 The WebUI exposed by this repository is a normal module UI at `/idm`. It is the
 editing surface for identity-to-organization-function assignment links.
 
+Its interface archetypes, consequence classes, contextual-help contract, and
+accessibility evidence are recorded in
+[`docs/INTERFACE_PATTERN_MIGRATION.md`](docs/INTERFACE_PATTERN_MIGRATION.md).
+
 ## Migration And Permission Transition
 
 The initial IDM migration creates new IDM-owned tables only. No data is migrated
@@ -128,6 +139,21 @@ Delegated and acting-for assignments are source-specific:
   acting-for account on that source identity, and the organization function must
   allow acting in place.
 
+Function requests and holder/authority initiated grants require a governed
+change record before the effective assignment is created. The target journeys,
+grant profiles, state model, and module boundaries are documented in
+[Function assignment request and grant workflows](docs/FUNCTION_ASSIGNMENT_WORKFLOWS.md).
+
+Assignments with a future `valid_until` are resolved as ineffective immediately
+after that boundary. When Celery beat and an IDM-capable worker are running, the
+shared `govoplan.idm.expire_assignments` task also emits the corresponding
+`idm.function_assignment.expired.v1` event. IDM records the event marker in the
+same database transaction, making repeated sweeps idempotent.
+
+Typed group and relationship behavior, including effective-time resolution and
+the provider-neutral capability consumed by Distribution Lists, is documented
+in [Typed groups and effective-dated relationships](docs/TYPED_RELATIONSHIPS.md).
+
 ## First Milestone
 
 The first useful milestone is a read-only synchronization preview:

docs/FUNCTION_ASSIGNMENT_WORKFLOWS.md

@@ -0,0 +1,135 @@
+# Function Assignment Request And Grant Workflows
+
+## Purpose
+
+Assigning an identity to an organization function is a governed business
+change, not just an IDM table edit. IDM owns the request or grant record and the
+resulting effective-dated assignment. Organizations owns units and function
+definitions. Policy resolves who may initiate, clear, accept, reject, revoke,
+or recover a change. Workflow Engine runs the selected, version-pinned process.
+
+An assignment workflow never grants generic application permissions by itself.
+Access may project an accepted function assignment into roles only through an
+explicit function mapping.
+
+## Two User Journeys
+
+### Request A Function
+
+An eligible user finds a function, sees whether it can be requested and why,
+provides the required justification/evidence, and submits a request. The
+effective policy determines whether the request goes to a current holder, a
+clearing authority, both in sequence, or is unavailable because only an
+authority may initiate the assignment.
+
+The requester can inspect progress, respond to questions, withdraw while
+permitted, and receive the final decision. No effective assignment exists until
+all required approvals and any configured recipient acceptance are complete.
+
+### Bestow A Function
+
+An effective function holder or authority selects an eligible identity and
+proposes a function assignment with scope, validity, delegation, and evidence.
+The policy determines whether the holder may complete the grant, whether an
+authority must clear it, or whether only the authority can initiate and grant
+it. Recipient acceptance can be required or waived only by an explicit policy
+with recorded provenance.
+
+## Grant Profiles
+
+The first policy profiles are:
+
+- `holder_grant`: an effective holder may initiate and approve within the
+  configured scope and duration ceilings.
+- `holder_with_authority_clearance`: a holder or eligible requester may
+  initiate, but the configured authority must clear the change.
+- `authority_only`: only the configured authority may initiate and approve;
+  other users receive an unavailable action with an explanation.
+
+Profiles may additionally configure self-request eligibility, recipient
+acceptance, evidence requirements, separation of duties, quorum, expiry,
+maximum validity, delegation limits, vacancy routing, and escalation. Function
+or function-type configuration references a profile; Policy produces the
+effective decision and provenance rather than IDM duplicating policy logic.
+
+## IDM Aggregate
+
+IDM persists one function-assignment change aggregate for both journeys:
+
+- change ID, tenant, kind (`request` or `grant`), function, unit, candidate
+  identity/account, requested validity, and assignment source
+- initiator, represented actor/function where applicable, policy profile and
+  decision revision
+- pinned workflow definition/revision and workflow instance reference
+- justification, evidence references, comments, and redacted process variables
+- state and append-only state history
+- resulting assignment ID, or rejection/withdrawal/expiry reason
+- idempotency key and optimistic-concurrency revision
+
+Candidate states are `draft`, `submitted`, `awaiting_holder`,
+`awaiting_authority`, `awaiting_recipient`, `changes_requested`, `blocked`,
+`approved`, `accepted`, `applied`, `rejected`, `withdrawn`, `expired`,
+`cancelled`, and `failed_manual_review`. Not every profile uses every state.
+
+The workflow instance coordinates the process, but the IDM change record is the
+business source of truth. A workflow callback applies the assignment exactly
+once after successful completion. Failed or outcome-unknown application is
+reconciled without starting a second grant.
+
+## Required Guarantees
+
+- Every action rechecks current identity, holder, authority, function, and
+  Policy facts. Authorization captured at submission is evidence, not a future
+  permission grant.
+- A holder who loses the source function cannot approve later unless Policy
+  explicitly permits continuity for an already-open case.
+- Vacancy and unavailable authority routes produce a visible blocked/escalated
+  state rather than silently granting or losing the request.
+- The proposer and required clearer cannot be the same actor where separation
+  of duties applies.
+- Effective dates, revocation, expiry, delegation, and acting-for semantics use
+  the canonical IDM assignment contract.
+- Notifications are emitted for durable waiting states and final outcomes when
+  Notifications is installed.
+- Audit receives non-secret evidence for every transition when Audit is
+  installed.
+- The direct administrative write path is either disabled for governed
+  functions or treated as an explicit emergency override with reason,
+  provenance, and equivalent evidence.
+
+## Configuration And Runtime Contract
+
+Function settings use `assignment_governance`. Tenant defaults may be supplied
+through `settings.function_assignment_governance_defaults`; function values
+override only the corresponding defaults. Supported keys include
+`request_profile`, `grant_profile`, `authority_function_id`,
+`recipient_acceptance_required`, `evidence_required`,
+`separation_of_duties`, `quorum`, `maximum_validity_days`, and
+`request_expiry_hours`. Missing or malformed profiles fail closed.
+
+IDM exposes governed changes at
+`/api/v1/idm/function-assignment-changes`. Mutations require a strong `If-Match`
+precondition and the aggregate revision. Requests and grants pin the exact
+Workflow definition revision and hash, retain append-only transition evidence,
+support review change requests and responses, and apply an assignment exactly
+once. Vacant holder or authority functions create a visible `blocked` state;
+the lifecycle worker expires overdue open changes durably.
+
+Direct administration remains available for independently deployed IDM. When
+a function has an enabled governance profile, however, direct create or update
+requires `idm:function_change:admin` plus an emergency override reason. IDM
+stores the actor, time, reason, and evidence references with the assignment and
+includes them in the normal Audit change record.
+
+## Module Boundaries
+
+- Organizations: function definitions and assignment-policy profile reference.
+- IDM: request/grant aggregate, candidate validation, effective assignment, and
+  assignment lifecycle.
+- Policy: effective initiator/approver/acceptance/quorum/expiry decisions and
+  explanations.
+- Workflow Engine: versioned definition installation and process execution.
+- Workflow: optional authoring, inspection, and override UI.
+- Notifications: waiting-state and outcome notifications.
+- Audit: immutable transition and assignment evidence.
+- Access: optional projection of accepted function facts into roles/rights.

docs/INTERFACE_PATTERN_MIGRATION.md

@@ -0,0 +1,51 @@
+# IDM Interface Pattern Migration
+
+This document records the bounded migration of IDM-owned WebUI surfaces to the
+GovOPlaN interface pattern language. Identity owns people and account links,
+Organizations owns functions and units, Access owns application authority, and
+IDM owns effective identity-to-function facts and their governed lifecycle.
+
+## Surface Inventory
+
+| Surface | Archetype | Consequence class | Contract |
+| --- | --- | --- | --- |
+| `/idm` assignments | Repeated administration and governed relationship directory | Create, change, deactivate, delegate, or act for an assignment | Shared DataGrid/dialog/actions, accurate draft baseline, explicit permission and organization prerequisites, contextual field help |
+| IDM governance settings | Effective tenant configuration | Require change evidence and alter audit retention | Shared card/form/toggles, dirty-state guard, write blocker, consequence help |
+| Function request/grant list | Governed work queue | Start or inspect a function change | Shared grid/loading/status/action slot, localized state and workflow vocabulary |
+| Request/grant editor | Guided consequential editor | Submit a governed assignment change | Shared segmented control/dialog/forms, guarded draft, effective dates, justification and evidence help |
+| Function-change detail | Decision and provenance record | Approve, reject, accept, request changes, withdraw, respond, or recover | Shared confirmation, available-action contract, retained actor/policy/workflow/history evidence |
+| `idm.action.view-function-assignments` | Contextual cross-module action | Navigate with function context | Declared capability surface, permission guard, no Organizations-private import |
+
+## Consequence And Availability Rules
+
+- Opening an existing assignment does not mark it dirty. The guard compares the
+  editor to the loaded baseline and protects only actual changes.
+- Direct assignment changes require IDM write authority. Governed functions use
+  request/grant workflows for normal changes; direct edits are emergency
+  overrides with a retained reason and optional evidence references.
+- Delegated and acting-for assignments remain tied to a valid source assignment
+  and the Organizations flags that permit those semantics.
+- Assignment and governance settings do not create application permissions.
+  Access must separately map accepted institutional facts to assignable roles.
+- Decisions are confirmed before execution. The resulting actor, comment,
+  policy decision, workflow revision, state transition, and evidence remain in
+  the governed record.
+- Deactivation and expiry remove a fact from effective resolution while
+  retaining provenance and lifecycle evidence.
+- Missing permission, identity search, and organization functions identify the
+  required action, responsible administrator, and destination.
+
+## State And Accessibility Evidence
+
+The module uses Core page/card/grid/dialog/loading/alert/status/action-blocker,
+field-help, disabled-reason, confirmation, and unsaved-change controls. Shared
+dialogs retain focus containment and return behavior; stable grid actions remain
+keyboard reachable. Existing responsive CSS collapses summaries and histories
+to one column at narrow widths.
+
+English and German catalogues cover route metadata, assignment fields, governed
+states, workflow steps, decisions, confirmations, and accessible labels. Dates
+follow the selected platform locale. Manifest topics provide stable route,
+field, blocker, workflow, and consequence references without importing optional
+Policy, Audit, Notifications, Access, or Workflow Engine implementations.
+

docs/TYPED_RELATIONSHIPS.md

@@ -0,0 +1,51 @@
+# Typed groups and effective-dated relationships
+
+IDM owns tenant-scoped business group facts and the effective-dated links from
+identities to those groups. Identity lifecycle state remains owned by Identity;
+an active group membership never activates an identity and never grants an
+application permission.
+
+## Contract
+
+The `idm.relationships` capability exposes immutable Core DTOs. Consumers can:
+
+- list typed groups without importing IDM persistence models;
+- resolve one or many identities to their current relationships;
+- resolve one or many groups to current identities at a caller-supplied time;
+- request a membership decision set that includes future, expired, revoked,
+  inactive-group, and inactive-identity exclusions;
+- retain source provider, external resource, revision, typed properties, and
+  provenance data in downstream evidence.
+
+Cross-tenant group references are rejected. The contract carries facts only and
+does not imply a right, role, or permission.
+
+## Persistence and lifecycle
+
+`idm_typed_groups` stores the stable tenant/type/key identity and external source
+reference. `idm_identity_relationships` stores one identity-to-group or
+identity-to-identity link, its relationship kind, validity window, source,
+properties, provenance, and optimistic revision.
+
+Create, change, revoke, and elapsed-validity transitions emit versioned platform
+events:
+
+- `idm.typed_group.created.v1`
+- `idm.typed_group.changed.v1`
+- `idm.relationship.created.v1`
+- `idm.relationship.changed.v1`
+- `idm.relationship.revoked.v1`
+- `idm.relationship.expired.v1`
+
+The existing IDM lifecycle worker claims an elapsed relationship and records its
+event marker in the same transaction. Repeated or concurrent sweeps therefore do
+not publish duplicate expiry events.
+
+## Distribution Lists
+
+When Distribution Lists is enabled, an `idm_group` entry resolves through this
+capability. Every effective identity becomes an internal-mail candidate when an
+active linked account exists. Every rejected relationship remains visible in the
+expansion evidence with a stable reason code. Distribution Lists stores only the
+provider reference and frozen expansion evidence, not IDM records.
+

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@govoplan/idm-webui",
-  "version": "0.1.8",
+  "version": "0.1.18",
   "private": true,
   "type": "module",
   "main": "webui/src/index.ts",
@@ -19,14 +19,14 @@
     "LICENSE"
   ],
   "peerDependencies": {
-    "@govoplan/core-webui": "^0.1.8",
-    "@vitejs/plugin-react": "^4.3.4",
+    "@govoplan/core-webui": "^0.1.18",
+    "@vitejs/plugin-react": "^5.2.0",
     "lucide-react": "^1.23.0",
-    "react": "^19.0.0",
-    "react-dom": "^19.0.0",
-    "react-router-dom": "^7.1.1",
+    "react": ">=19.2.7 <20",
+    "react-dom": ">=19.2.7 <20",
+    "react-router": ">=8.3.0 <9",
     "typescript": "^5.7.2",
-    "vite": "^6.0.6"
+    "vite": "^7.3.6"
   },
   "peerDependenciesMeta": {
     "@govoplan/core-webui": {

pyproject.toml

@@ -4,15 +4,15 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "govoplan-idm"
-version = "0.1.8"
+version = "0.1.18"
 description = "GovOPlaN identity management bridge module."
 readme = "README.md"
 requires-python = ">=3.12"
 authors = [{ name = "GovOPlaN" }]
 dependencies = [
-  "govoplan-core>=0.1.8",
-  "govoplan-identity>=0.1.8",
-  "govoplan-organizations>=0.1.8",
+  "govoplan-core>=0.1.18",
+  "govoplan-identity>=0.1.18",
+  "govoplan-organizations>=0.1.18",
 ]
 
 [tool.setuptools.packages.find]

src/govoplan_idm/backend/api/v1/function_changes.py

@@ -0,0 +1,551 @@
+from __future__ import annotations
+
+from math import ceil
+
+from fastapi import APIRouter, Depends, Header, HTTPException, Query, Response, status
+from sqlalchemy import func, select
+from sqlalchemy.exc import IntegrityError
+from sqlalchemy.orm import Session
+
+from govoplan_core.audit.logging import audit_from_principal
+from govoplan_core.auth import ApiPrincipal, get_api_principal
+from govoplan_core.core.access import CAPABILITY_AUDIT_RECORDER
+from govoplan_core.core.concurrency import (
+    ConcurrencyError,
+    MissingPreconditionError,
+    RevisionConflictError,
+    assert_revision_precondition,
+)
+from govoplan_core.core.identity import (
+    CAPABILITY_IDENTITY_DIRECTORY,
+    IdentityDirectory,
+)
+from govoplan_core.core.organizations import (
+    CAPABILITY_ORGANIZATION_DIRECTORY,
+    OrganizationDirectory,
+    OrganizationFunctionRef,
+)
+from govoplan_core.core.policy import (
+    CAPABILITY_POLICY_FUNCTION_ASSIGNMENT_GOVERNANCE,
+)
+from govoplan_core.core.runtime import get_registry
+from govoplan_core.core.workflows import CAPABILITY_WORKFLOW_ORCHESTRATION
+from govoplan_core.db.session import get_session
+from govoplan_idm.backend.db.models import IdmFunctionAssignmentChange
+from govoplan_idm.backend.function_assignment_changes import (
+    FunctionAssignmentChangeConflict,
+    FunctionAssignmentChangeUnavailable,
+    available_change_actions,
+    change_events,
+    create_function_assignment_change,
+    resolve_submission_capability,
+    transition_function_assignment_change,
+    visible_change_filter,
+)
+
+from .schemas import (
+    FunctionAssignmentCapabilityItem,
+    FunctionAssignmentChangeActionRequest,
+    FunctionAssignmentChangeCreateRequest,
+    FunctionAssignmentChangeEventItem,
+    FunctionAssignmentChangeItem,
+    FunctionAssignmentChangeKind,
+    FunctionAssignmentChangeList,
+)
+
+
+router = APIRouter(prefix="/function-assignment-changes")
+READ_SCOPES = (
+    "idm:function_change:read",
+    "idm:function_request:create",
+    "idm:function_grant:create",
+    "idm:function_change:decide",
+    "idm:function_change:admin",
+    "idm:organization_assignment:write",
+)
+
+
+def _require_any(principal: ApiPrincipal, *scopes: str) -> None:
+    if not any(principal.has(scope) for scope in scopes):
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail=f"Requires one of: {', '.join(scopes)}",
+        )
+
+
+def _registry():
+    registry = get_registry()
+    if registry is None:
+        raise HTTPException(
+            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
+            detail="The module registry is unavailable.",
+        )
+    return registry
+
+
+def _organization_directory() -> OrganizationDirectory:
+    registry = _registry()
+    capability = registry.capability(CAPABILITY_ORGANIZATION_DIRECTORY)
+    if not isinstance(capability, OrganizationDirectory):
+        raise HTTPException(
+            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
+            detail="The Organizations directory is unavailable.",
+        )
+    return capability
+
+
+def _identity_directory() -> IdentityDirectory:
+    registry = _registry()
+    capability = registry.capability(CAPABILITY_IDENTITY_DIRECTORY)
+    if not isinstance(capability, IdentityDirectory):
+        raise HTTPException(
+            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
+            detail="The Identity directory is unavailable.",
+        )
+    return capability
+
+
+def _function(function_id: str, tenant_id: str) -> OrganizationFunctionRef:
+    function = _organization_directory().get_function(function_id)
+    if function is None or function.tenant_id != tenant_id:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Organization function not found.",
+        )
+    return function
+
+
+def _historical_function(
+    function_id: str,
+    tenant_id: str,
+) -> OrganizationFunctionRef | None:
+    try:
+        function = _organization_directory().get_function(function_id)
+    except HTTPException:
+        return None
+    if function is None or function.tenant_id != tenant_id:
+        return None
+    return function
+
+
+def _validate_candidate(identity_id: str, account_id: str | None) -> None:
+    directory = _identity_directory()
+    if directory.get_identity(identity_id) is None:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Identity not found.",
+        )
+    if account_id is not None and not any(
+        link.account_id == account_id
+        for link in directory.accounts_for_identity(identity_id)
+    ):
+        raise HTTPException(
+            status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
+            detail="Account is not linked to the selected identity.",
+        )
+
+
+def _change_query(
+    session: Session,
+    principal: ApiPrincipal,
+):
+    statement = select(IdmFunctionAssignmentChange).where(
+        IdmFunctionAssignmentChange.tenant_id == principal.tenant_id
+    )
+    visibility = visible_change_filter(session, principal)
+    return statement.where(visibility) if visibility is not None else statement
+
+
+def _get_change(
+    session: Session,
+    principal: ApiPrincipal,
+    change_id: str,
+) -> IdmFunctionAssignmentChange:
+    change = session.scalar(
+        _change_query(session, principal).where(
+            IdmFunctionAssignmentChange.id == change_id
+        )
+    )
+    if change is None:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Function assignment change not found.",
+        )
+    return change
+
+
+def _event_item(event) -> FunctionAssignmentChangeEventItem:
+    return FunctionAssignmentChangeEventItem(
+        id=event.id,
+        sequence=event.sequence,
+        action=event.action,
+        from_state=event.from_state,
+        to_state=event.to_state,
+        actor_account_id=event.actor_account_id,
+        actor_identity_id=event.actor_identity_id,
+        actor_assignment_id=event.actor_assignment_id,
+        comment=event.comment,
+        evidence=list(event.evidence),
+        policy_decision=dict(event.policy_decision),
+        workflow_step_id=event.workflow_step_id,
+        details=dict(event.details),
+        created_at=event.created_at,
+    )
+
+
+def _change_item(
+    session: Session,
+    principal: ApiPrincipal,
+    change: IdmFunctionAssignmentChange,
+    *,
+    include_events: bool,
+) -> FunctionAssignmentChangeItem:
+    function = _historical_function(change.function_id, change.tenant_id)
+    if function is None:
+        actions, reason = [], "The referenced organization function is no longer available."
+    else:
+        try:
+            actions, reason = available_change_actions(
+                session,
+                principal=principal,
+                registry=get_registry(),
+                change=change,
+                function=function,
+            )
+        except FunctionAssignmentChangeUnavailable as exc:
+            actions, reason = [], str(exc)
+    return FunctionAssignmentChangeItem(
+        id=change.id,
+        tenant_id=change.tenant_id,
+        kind=change.kind,
+        state=change.state,
+        profile=change.profile,
+        function_id=change.function_id,
+        organization_unit_id=change.organization_unit_id,
+        candidate_identity_id=change.candidate_identity_id,
+        candidate_account_id=change.candidate_account_id,
+        initiator_account_id=change.initiator_account_id,
+        initiator_identity_id=change.initiator_identity_id,
+        represented_assignment_id=change.represented_assignment_id,
+        justification=change.justification,
+        evidence=list(change.evidence),
+        requested_valid_from=change.requested_valid_from,
+        requested_valid_until=change.requested_valid_until,
+        applies_to_subunits=change.applies_to_subunits,
+        assignment_source=change.assignment_source,
+        required_steps=list(change.required_steps),
+        completed_steps=list(change.completed_steps),
+        policy_decision=dict(change.policy_decision),
+        workflow_definition_id=change.workflow_definition_id,
+        workflow_definition_revision_id=change.workflow_definition_revision_id,
+        workflow_definition_revision=change.workflow_definition_revision,
+        workflow_definition_hash=change.workflow_definition_hash,
+        workflow_instance_id=change.workflow_instance_id,
+        workflow_current_step_id=change.workflow_current_step_id,
+        resulting_assignment_id=change.resulting_assignment_id,
+        expires_at=change.expires_at,
+        outcome_reason=change.outcome_reason,
+        resource_revision=change.resource_revision,
+        etag=change.strong_etag,
+        metadata=dict(change.metadata_),
+        events=(
+            [
+                _event_item(event)
+                for event in change_events(session, change_id=change.id)
+            ]
+            if include_events
+            else []
+        ),
+        available_actions=actions,
+        availability_reason=reason,
+        created_at=change.created_at,
+        updated_at=change.updated_at,
+    )
+
+
+def _set_etag(response: Response, change: IdmFunctionAssignmentChange) -> None:
+    response.headers["ETag"] = change.strong_etag
+
+
+def _record_change_audit(
+    session: Session,
+    principal: ApiPrincipal,
+    *,
+    change: IdmFunctionAssignmentChange,
+    action: str,
+    from_state: str | None,
+) -> None:
+    registry = get_registry()
+    if registry is None or not registry.has_capability(CAPABILITY_AUDIT_RECORDER):
+        return
+    audit_from_principal(
+        session,
+        principal,
+        action=f"idm.function_assignment_change.{action}",
+        object_type="function_assignment_change",
+        object_id=change.id,
+        details={
+            "kind": change.kind,
+            "from_state": from_state,
+            "to_state": change.state,
+            "function_id": change.function_id,
+            "candidate_identity_id": change.candidate_identity_id,
+            "represented_assignment_id": change.represented_assignment_id,
+            "policy_decision": dict(change.policy_decision),
+            "workflow_definition_id": change.workflow_definition_id,
+            "workflow_definition_revision_id": change.workflow_definition_revision_id,
+            "workflow_instance_id": change.workflow_instance_id,
+            "evidence": list(change.evidence),
+            "resulting_assignment_id": change.resulting_assignment_id,
+            "resource_revision": change.resource_revision,
+        },
+        commit=False,
+    )
+
+
+def _mutation_error(exc: Exception) -> HTTPException:
+    if isinstance(exc, MissingPreconditionError):
+        return HTTPException(
+            status_code=status.HTTP_428_PRECONDITION_REQUIRED,
+            detail=exc.as_dict(),
+        )
+    if isinstance(exc, RevisionConflictError):
+        return HTTPException(
+            status_code=status.HTTP_412_PRECONDITION_FAILED,
+            detail=exc.as_dict(),
+        )
+    if isinstance(exc, ConcurrencyError):
+        return HTTPException(
+            status_code=status.HTTP_409_CONFLICT,
+            detail={"code": "concurrency_conflict", "message": str(exc)},
+        )
+    if isinstance(exc, FunctionAssignmentChangeConflict):
+        return HTTPException(status_code=status.HTTP_409_CONFLICT, detail=str(exc))
+    return HTTPException(
+        status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
+        detail=str(exc),
+    )
+
+
+@router.get("/capability", response_model=FunctionAssignmentCapabilityItem)
+def get_function_assignment_capability(
+    kind: FunctionAssignmentChangeKind,
+    function_id: str = Query(min_length=1, max_length=36),
+    candidate_identity_id: str | None = Query(default=None, max_length=36),
+    candidate_account_id: str | None = Query(default=None, max_length=36),
+    has_evidence: bool = False,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> FunctionAssignmentCapabilityItem:
+    _require_any(principal, *READ_SCOPES)
+    candidate_identity_id = candidate_identity_id or principal.identity_id
+    if candidate_identity_id is None:
+        raise HTTPException(
+            status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
+            detail="A candidate identity is required.",
+        )
+    function = _function(function_id, principal.tenant_id)
+    registry = _registry()
+    decision, reason = resolve_submission_capability(
+        session,
+        principal=principal,
+        registry=registry,
+        kind=kind,
+        function=function,
+        candidate_identity_id=candidate_identity_id,
+        candidate_account_id=candidate_account_id,
+        has_evidence=has_evidence,
+    )
+    return FunctionAssignmentCapabilityItem(
+        kind=kind,
+        function_id=function_id,
+        available=bool(decision and decision.allowed),
+        reason=reason,
+        profile=decision.profile if decision else "unavailable",
+        required_steps=list(decision.required_steps) if decision else [],
+        requirements=list(decision.requirements) if decision else [],
+        authority_function_id=(decision.authority_function_id if decision else None),
+        evidence_required=bool(decision and decision.evidence_required),
+        recipient_acceptance_required=bool(
+            decision and decision.recipient_acceptance_required
+        ),
+        maximum_validity_days=(decision.maximum_validity_days if decision else None),
+        workflow_available=registry.has_capability(CAPABILITY_WORKFLOW_ORCHESTRATION),
+        policy_available=registry.has_capability(
+            CAPABILITY_POLICY_FUNCTION_ASSIGNMENT_GOVERNANCE
+        ),
+    )
+
+
+@router.get("", response_model=FunctionAssignmentChangeList)
+def list_function_assignment_changes(
+    kind: FunctionAssignmentChangeKind | None = None,
+    state_filter: str | None = Query(default=None, alias="state", max_length=40),
+    page: int = Query(default=1, ge=1),
+    page_size: int = Query(default=50, ge=1, le=200),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> FunctionAssignmentChangeList:
+    _require_any(principal, *READ_SCOPES)
+    statement = _change_query(session, principal)
+    if kind is not None:
+        statement = statement.where(IdmFunctionAssignmentChange.kind == kind)
+    if state_filter:
+        statement = statement.where(IdmFunctionAssignmentChange.state == state_filter)
+    total = int(
+        session.scalar(select(func.count()).select_from(statement.subquery())) or 0
+    )
+    rows = list(
+        session.scalars(
+            statement.order_by(
+                IdmFunctionAssignmentChange.updated_at.desc(),
+                IdmFunctionAssignmentChange.id.desc(),
+            )
+            .offset((page - 1) * page_size)
+            .limit(page_size)
+        )
+    )
+    return FunctionAssignmentChangeList(
+        changes=[
+            _change_item(session, principal, change, include_events=False)
+            for change in rows
+        ],
+        total=total,
+        page=page,
+        page_size=page_size,
+        pages=max(1, ceil(total / page_size)),
+    )
+
+
+@router.get("/{change_id}", response_model=FunctionAssignmentChangeItem)
+def get_function_assignment_change(
+    change_id: str,
+    response: Response,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> FunctionAssignmentChangeItem:
+    _require_any(principal, *READ_SCOPES)
+    change = _get_change(session, principal, change_id)
+    _set_etag(response, change)
+    return _change_item(session, principal, change, include_events=True)
+
+
+@router.post("", response_model=FunctionAssignmentChangeItem, status_code=201)
+def create_governed_function_assignment_change(
+    payload: FunctionAssignmentChangeCreateRequest,
+    response: Response,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> FunctionAssignmentChangeItem:
+    required = (
+        "idm:function_request:create"
+        if payload.kind == "request"
+        else "idm:function_grant:create"
+    )
+    _require_any(
+        principal,
+        required,
+        "idm:function_change:admin",
+        "idm:organization_assignment:write",
+    )
+    _validate_candidate(payload.candidate_identity_id, payload.candidate_account_id)
+    try:
+        change, replayed = create_function_assignment_change(
+            session,
+            principal=principal,
+            registry=_registry(),
+            function=_function(payload.function_id, principal.tenant_id),
+            payload=payload,
+        )
+        if not replayed:
+            _record_change_audit(
+                session,
+                principal,
+                change=change,
+                action="created",
+                from_state=None,
+            )
+        session.commit()
+    except (
+        FunctionAssignmentChangeConflict,
+        FunctionAssignmentChangeUnavailable,
+    ) as exc:
+        session.rollback()
+        raise _mutation_error(exc) from exc
+    except IntegrityError as exc:
+        session.rollback()
+        raise HTTPException(
+            status_code=status.HTTP_409_CONFLICT,
+            detail="The function assignment change conflicts with existing data.",
+        ) from exc
+    session.refresh(change)
+    response.status_code = status.HTTP_200_OK if replayed else status.HTTP_201_CREATED
+    _set_etag(response, change)
+    return _change_item(session, principal, change, include_events=True)
+
+
+@router.post("/{change_id}/actions", response_model=FunctionAssignmentChangeItem)
+def act_on_function_assignment_change(
+    change_id: str,
+    payload: FunctionAssignmentChangeActionRequest,
+    response: Response,
+    if_match: str | None = Header(default=None, alias="If-Match"),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> FunctionAssignmentChangeItem:
+    change = _get_change(session, principal, change_id)
+    from_state = change.state
+    if payload.action == "recover":
+        _require_any(principal, "idm:function_change:admin")
+    elif payload.action not in {"withdraw", "respond"}:
+        _require_any(
+            principal,
+            "idm:function_change:decide",
+            "idm:function_change:admin",
+            "idm:organization_assignment:write",
+        )
+    try:
+        assert_revision_precondition(
+            if_match,
+            resource_type="idm_function_assignment_change",
+            resource_id=change.id,
+            submitted_base_revision=payload.base_revision,
+        )
+        change = transition_function_assignment_change(
+            session,
+            principal=principal,
+            registry=_registry(),
+            change=change,
+            function=_function(change.function_id, change.tenant_id),
+            action=payload.action,
+            base_revision=payload.base_revision,
+            comment=payload.comment,
+            evidence=payload.evidence,
+        )
+        _record_change_audit(
+            session,
+            principal,
+            change=change,
+            action=payload.action,
+            from_state=from_state,
+        )
+        session.commit()
+    except (
+        ConcurrencyError,
+        FunctionAssignmentChangeConflict,
+        FunctionAssignmentChangeUnavailable,
+    ) as exc:
+        session.rollback()
+        raise _mutation_error(exc) from exc
+    except IntegrityError as exc:
+        session.rollback()
+        raise HTTPException(
+            status_code=status.HTTP_409_CONFLICT,
+            detail="The function assignment transition conflicts with existing data.",
+        ) from exc
+    session.refresh(change)
+    _set_etag(response, change)
+    return _change_item(session, principal, change, include_events=True)
+
+
+__all__ = ["router"]

src/govoplan_idm/backend/api/v1/relationships.py

@@ -0,0 +1,569 @@
+from __future__ import annotations
+
+from datetime import datetime
+
+from fastapi import APIRouter, Depends, HTTPException, Query, status
+from sqlalchemy.exc import IntegrityError
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal, require_any_scope
+from govoplan_core.core.events import (
+    EventActorRef,
+    EventObjectRef,
+    EventTenantRef,
+    PlatformEvent,
+    emit_platform_event,
+)
+from govoplan_core.core.identity import (
+    CAPABILITY_IDENTITY_DIRECTORY,
+    IdentityDirectory,
+)
+from govoplan_core.core.idm import (
+    CAPABILITY_IDM_RELATIONSHIPS,
+    IdentityRelationshipDecisionRef,
+    IdentityRelationshipRef,
+    IdmRelationshipDirectory,
+    TypedGroupRef,
+)
+from govoplan_core.core.principal_cache import invalidate_auth_principals
+from govoplan_core.core.runtime import get_registry
+from govoplan_core.db.session import get_session
+from govoplan_core.security.time import ensure_aware_utc, utc_now
+from govoplan_idm.backend.db.models import (
+    IdmIdentityRelationship,
+    IdmTypedGroup,
+)
+
+from .schemas import (
+    IdentityRelationshipCreateRequest,
+    IdentityRelationshipDecisionItem,
+    IdentityRelationshipItem,
+    IdentityRelationshipList,
+    IdentityRelationshipRevokeRequest,
+    IdentityRelationshipUpdateRequest,
+    TypedGroupCreateRequest,
+    TypedGroupItem,
+    TypedGroupList,
+    TypedGroupMembershipResolutionItem,
+    TypedGroupUpdateRequest,
+)
+
+
+router = APIRouter()
+
+RELATIONSHIP_READ_SCOPES = (
+    "idm:relationship:read",
+    "idm:relationship:write",
+)
+RELATIONSHIP_WRITE_SCOPES = ("idm:relationship:write",)
+
+
+def _not_found(label: str) -> HTTPException:
+    return HTTPException(
+        status_code=status.HTTP_404_NOT_FOUND,
+        detail=f"{label} not found",
+    )
+
+
+def _invalid(message: str) -> HTTPException:
+    return HTTPException(
+        status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
+        detail=message,
+    )
+
+
+def _conflict(message: str) -> HTTPException:
+    return HTTPException(status_code=status.HTTP_409_CONFLICT, detail=message)
+
+
+def _typed_group_item(item: IdmTypedGroup) -> TypedGroupItem:
+    return TypedGroupItem.model_validate(
+        {column.name: getattr(item, column.name) for column in item.__table__.columns}
+    )
+
+
+def _relationship_item(item: IdmIdentityRelationship) -> IdentityRelationshipItem:
+    return IdentityRelationshipItem.model_validate(
+        {column.name: getattr(item, column.name) for column in item.__table__.columns}
+    )
+
+
+def _typed_group_ref_item(item: TypedGroupRef) -> TypedGroupItem:
+    return TypedGroupItem(
+        id=item.id,
+        tenant_id=item.tenant_id,
+        key=item.key,
+        name=item.name,
+        group_type=item.group_type,
+        description=item.description,
+        status=item.status,
+        source_provider=item.source_provider,
+        source_resource_type=item.source_resource_type,
+        source_resource_id=item.source_resource_id,
+        source_revision=item.source_revision,
+        properties=dict(item.properties),
+        provenance=dict(item.provenance),
+        revision=item.revision,
+    )
+
+
+def _relationship_ref_item(
+    item: IdentityRelationshipRef,
+) -> IdentityRelationshipItem:
+    return IdentityRelationshipItem(
+        id=item.id,
+        tenant_id=item.tenant_id,
+        relationship_kind=item.relationship_kind,
+        subject_identity_id=item.subject_identity_id,
+        target_group_id=item.target_group_id,
+        related_identity_id=item.related_identity_id,
+        role=item.role,
+        valid_from=item.valid_from,
+        valid_until=item.valid_until,
+        status=item.status,
+        revoked_at=item.revoked_at,
+        revoked_by=item.revoked_by,
+        revocation_reason=item.revocation_reason,
+        source_provider=item.source_provider,
+        source_resource_type=item.source_resource_type,
+        source_resource_id=item.source_resource_id,
+        source_revision=item.source_revision,
+        properties=dict(item.properties),
+        provenance=dict(item.provenance),
+        revision=item.revision,
+    )
+
+
+def _decision_item(
+    item: IdentityRelationshipDecisionRef,
+) -> IdentityRelationshipDecisionItem:
+    return IdentityRelationshipDecisionItem(
+        relationship=_relationship_ref_item(item.relationship),
+        included=item.included,
+        code=item.code,
+        explanation=item.explanation,
+        identity_status=item.identity_status,
+    )
+
+
+def _tenant_row(session: Session, model, item_id: str, tenant_id: str, label: str):
+    item = session.get(model, item_id)
+    if item is None or item.tenant_id != tenant_id:
+        raise _not_found(label)
+    return item
+
+
+def _identity_directory() -> IdentityDirectory:
+    registry = get_registry()
+    if registry is None or not registry.has_capability(CAPABILITY_IDENTITY_DIRECTORY):
+        raise HTTPException(
+            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
+            detail="Identity directory is unavailable",
+        )
+    capability = registry.require_capability(CAPABILITY_IDENTITY_DIRECTORY)
+    if not isinstance(capability, IdentityDirectory):
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=f"Invalid capability: {CAPABILITY_IDENTITY_DIRECTORY}",
+        )
+    return capability
+
+
+def _relationship_directory() -> IdmRelationshipDirectory:
+    registry = get_registry()
+    if registry is None or not registry.has_capability(CAPABILITY_IDM_RELATIONSHIPS):
+        raise HTTPException(
+            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
+            detail="IDM relationship directory is unavailable",
+        )
+    capability = registry.require_capability(CAPABILITY_IDM_RELATIONSHIPS)
+    if not isinstance(capability, IdmRelationshipDirectory):
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=f"Invalid capability: {CAPABILITY_IDM_RELATIONSHIPS}",
+        )
+    return capability
+
+
+def _ensure_identity(identity_id: str, *, label: str = "Identity") -> None:
+    if _identity_directory().get_identity(identity_id) is None:
+        raise _not_found(label)
+
+
+def _ensure_target_shape(
+    target_group_id: str | None,
+    related_identity_id: str | None,
+) -> None:
+    if (target_group_id is None) == (related_identity_id is None):
+        raise _invalid(
+            "A relationship must target exactly one typed group or related identity."
+        )
+
+
+def _ensure_window(valid_from: datetime | None, valid_until: datetime | None) -> None:
+    start = ensure_aware_utc(valid_from)
+    end = ensure_aware_utc(valid_until)
+    if start is not None and end is not None and end <= start:
+        raise _invalid("Relationship end must be after its start.")
+
+
+def _emit_change(
+    session: Session,
+    principal: ApiPrincipal,
+    *,
+    event_type: str,
+    resource_type: str,
+    resource_id: str,
+    payload: dict[str, object],
+    subject_identity_id: str | None = None,
+) -> None:
+    emit_platform_event(
+        session,
+        PlatformEvent(
+            type=event_type,
+            module_id="idm",
+            payload=payload,
+            actor=EventActorRef(type="account", id=principal.account_id),
+            tenant=EventTenantRef(id=principal.tenant_id),
+            subject=(
+                EventObjectRef(type="identity", id=subject_identity_id)
+                if subject_identity_id is not None
+                else None
+            ),
+            resource=EventObjectRef(type=resource_type, id=resource_id),
+            classification="internal",
+        ),
+    )
+
+
+def _commit(session: Session, principal: ApiPrincipal, item, *, resource_type: str):
+    invalidate_auth_principals(
+        session,
+        tenant_id=principal.tenant_id,
+        source_module="idm",
+        resource_type=resource_type,
+        resource_id=item.id,
+    )
+    try:
+        session.commit()
+    except IntegrityError as exc:
+        session.rollback()
+        raise _conflict("The IDM relationship conflicts with existing data.") from exc
+    session.refresh(item)
+    return item
+
+
+@router.get("/typed-groups", response_model=TypedGroupList)
+def list_typed_groups(
+    query: str | None = Query(default=None, max_length=255),
+    group_type: str | None = Query(default=None, max_length=80),
+    include_inactive: bool = False,
+    limit: int = Query(default=100, ge=1, le=1000),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_any_scope(*RELATIONSHIP_READ_SCOPES)),
+) -> TypedGroupList:
+    statement = session.query(IdmTypedGroup).filter(
+        IdmTypedGroup.tenant_id == principal.tenant_id
+    )
+    if not include_inactive:
+        statement = statement.filter(IdmTypedGroup.status == "active")
+    if group_type:
+        statement = statement.filter(IdmTypedGroup.group_type == group_type)
+    if query:
+        statement = statement.filter(IdmTypedGroup.name.ilike(f"%{query.strip()}%"))
+    total = statement.count()
+    rows = (
+        statement.order_by(IdmTypedGroup.name.asc(), IdmTypedGroup.id.asc())
+        .limit(limit)
+        .all()
+    )
+    return TypedGroupList(groups=[_typed_group_item(item) for item in rows], total=total)
+
+
+@router.post(
+    "/typed-groups",
+    response_model=TypedGroupItem,
+    status_code=status.HTTP_201_CREATED,
+)
+def create_typed_group(
+    payload: TypedGroupCreateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_any_scope(*RELATIONSHIP_WRITE_SCOPES)),
+) -> TypedGroupItem:
+    item = IdmTypedGroup(
+        tenant_id=principal.tenant_id,
+        **payload.model_dump(),
+        status="active",
+        revision=1,
+    )
+    session.add(item)
+    try:
+        session.flush()
+    except IntegrityError as exc:
+        session.rollback()
+        raise _conflict("A typed group with this type and key already exists.") from exc
+    _emit_change(
+        session,
+        principal,
+        event_type="idm.typed_group.created.v1",
+        resource_type="typed_group",
+        resource_id=item.id,
+        payload={"group_type": item.group_type, "key": item.key, "revision": 1},
+    )
+    return _typed_group_item(
+        _commit(session, principal, item, resource_type="typed_group")
+    )
+
+
+@router.patch("/typed-groups/{group_id}", response_model=TypedGroupItem)
+def update_typed_group(
+    group_id: str,
+    payload: TypedGroupUpdateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_any_scope(*RELATIONSHIP_WRITE_SCOPES)),
+) -> TypedGroupItem:
+    item = _tenant_row(
+        session, IdmTypedGroup, group_id, principal.tenant_id, "Typed group"
+    )
+    if item.revision != payload.base_revision:
+        raise _conflict("The typed group changed since it was loaded.")
+    values = payload.model_dump(exclude_unset=True, exclude={"base_revision"})
+    for key, value in values.items():
+        setattr(item, key, value)
+    item.revision += 1
+    session.flush()
+    _emit_change(
+        session,
+        principal,
+        event_type="idm.typed_group.changed.v1",
+        resource_type="typed_group",
+        resource_id=item.id,
+        payload={"group_type": item.group_type, "key": item.key, "revision": item.revision},
+    )
+    return _typed_group_item(
+        _commit(session, principal, item, resource_type="typed_group")
+    )
+
+
+@router.get("/relationships", response_model=IdentityRelationshipList)
+def list_identity_relationships(
+    identity_id: str | None = Query(default=None, max_length=36),
+    group_id: str | None = Query(default=None, max_length=36),
+    relationship_kind: str | None = Query(default=None, max_length=80),
+    include_revoked: bool = False,
+    limit: int = Query(default=500, ge=1, le=1000),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_any_scope(*RELATIONSHIP_READ_SCOPES)),
+) -> IdentityRelationshipList:
+    statement = session.query(IdmIdentityRelationship).filter(
+        IdmIdentityRelationship.tenant_id == principal.tenant_id
+    )
+    if identity_id:
+        statement = statement.filter(
+            IdmIdentityRelationship.subject_identity_id == identity_id
+        )
+    if group_id:
+        statement = statement.filter(IdmIdentityRelationship.target_group_id == group_id)
+    if relationship_kind:
+        statement = statement.filter(
+            IdmIdentityRelationship.relationship_kind == relationship_kind
+        )
+    if not include_revoked:
+        statement = statement.filter(IdmIdentityRelationship.status == "active")
+    total = statement.count()
+    rows = (
+        statement.order_by(
+            IdmIdentityRelationship.created_at.asc(),
+            IdmIdentityRelationship.id.asc(),
+        )
+        .limit(limit)
+        .all()
+    )
+    return IdentityRelationshipList(
+        relationships=[_relationship_item(item) for item in rows], total=total
+    )
+
+
+@router.post(
+    "/relationships",
+    response_model=IdentityRelationshipItem,
+    status_code=status.HTTP_201_CREATED,
+)
+def create_identity_relationship(
+    payload: IdentityRelationshipCreateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_any_scope(*RELATIONSHIP_WRITE_SCOPES)),
+) -> IdentityRelationshipItem:
+    _ensure_target_shape(payload.target_group_id, payload.related_identity_id)
+    _ensure_window(payload.valid_from, payload.valid_until)
+    _ensure_identity(payload.subject_identity_id)
+    if payload.related_identity_id:
+        _ensure_identity(payload.related_identity_id, label="Related identity")
+    if payload.target_group_id:
+        _tenant_row(
+            session,
+            IdmTypedGroup,
+            payload.target_group_id,
+            principal.tenant_id,
+            "Typed group",
+        )
+    item = IdmIdentityRelationship(
+        tenant_id=principal.tenant_id,
+        **payload.model_dump(),
+        status="active",
+        revision=1,
+    )
+    session.add(item)
+    session.flush()
+    _emit_change(
+        session,
+        principal,
+        event_type="idm.relationship.created.v1",
+        resource_type="identity_relationship",
+        resource_id=item.id,
+        subject_identity_id=item.subject_identity_id,
+        payload={
+            "relationship_kind": item.relationship_kind,
+            "target_group_id": item.target_group_id,
+            "related_identity_id": item.related_identity_id,
+            "revision": 1,
+        },
+    )
+    return _relationship_item(
+        _commit(session, principal, item, resource_type="identity_relationship")
+    )
+
+
+@router.patch("/relationships/{relationship_id}", response_model=IdentityRelationshipItem)
+def update_identity_relationship(
+    relationship_id: str,
+    payload: IdentityRelationshipUpdateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_any_scope(*RELATIONSHIP_WRITE_SCOPES)),
+) -> IdentityRelationshipItem:
+    item = _tenant_row(
+        session,
+        IdmIdentityRelationship,
+        relationship_id,
+        principal.tenant_id,
+        "Identity relationship",
+    )
+    if item.status == "revoked":
+        raise _conflict("A revoked relationship cannot be changed.")
+    if item.revision != payload.base_revision:
+        raise _conflict("The identity relationship changed since it was loaded.")
+    values = payload.model_dump(exclude_unset=True, exclude={"base_revision"})
+    if values.get("target_group_id") is not None:
+        values["related_identity_id"] = None
+    if values.get("related_identity_id") is not None:
+        values["target_group_id"] = None
+    target_group_id = values.get("target_group_id", item.target_group_id)
+    related_identity_id = values.get("related_identity_id", item.related_identity_id)
+    _ensure_target_shape(target_group_id, related_identity_id)
+    valid_from = values.get("valid_from", item.valid_from)
+    valid_until = values.get("valid_until", item.valid_until)
+    _ensure_window(valid_from, valid_until)
+    if target_group_id:
+        _tenant_row(
+            session,
+            IdmTypedGroup,
+            target_group_id,
+            principal.tenant_id,
+            "Typed group",
+        )
+    if related_identity_id:
+        _ensure_identity(related_identity_id, label="Related identity")
+    for key, value in values.items():
+        setattr(item, key, value)
+    item.revision += 1
+    if item.valid_until is None or ensure_aware_utc(item.valid_until) > utc_now():
+        item.expired_event_at = None
+    session.flush()
+    _emit_change(
+        session,
+        principal,
+        event_type="idm.relationship.changed.v1",
+        resource_type="identity_relationship",
+        resource_id=item.id,
+        subject_identity_id=item.subject_identity_id,
+        payload={"relationship_kind": item.relationship_kind, "revision": item.revision},
+    )
+    return _relationship_item(
+        _commit(session, principal, item, resource_type="identity_relationship")
+    )
+
+
+@router.post(
+    "/relationships/{relationship_id}/revoke",
+    response_model=IdentityRelationshipItem,
+)
+def revoke_identity_relationship(
+    relationship_id: str,
+    payload: IdentityRelationshipRevokeRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_any_scope(*RELATIONSHIP_WRITE_SCOPES)),
+) -> IdentityRelationshipItem:
+    item = _tenant_row(
+        session,
+        IdmIdentityRelationship,
+        relationship_id,
+        principal.tenant_id,
+        "Identity relationship",
+    )
+    if item.revision != payload.base_revision:
+        raise _conflict("The identity relationship changed since it was loaded.")
+    if item.status == "revoked":
+        return _relationship_item(item)
+    item.status = "revoked"
+    item.revoked_at = utc_now()
+    item.revoked_by = principal.account_id
+    item.revocation_reason = payload.reason
+    item.revision += 1
+    session.flush()
+    _emit_change(
+        session,
+        principal,
+        event_type="idm.relationship.revoked.v1",
+        resource_type="identity_relationship",
+        resource_id=item.id,
+        subject_identity_id=item.subject_identity_id,
+        payload={
+            "relationship_kind": item.relationship_kind,
+            "reason": payload.reason,
+            "revision": item.revision,
+        },
+    )
+    return _relationship_item(
+        _commit(session, principal, item, resource_type="identity_relationship")
+    )
+
+
+@router.get(
+    "/typed-groups/{group_id}/memberships",
+    response_model=TypedGroupMembershipResolutionItem,
+)
+def resolve_typed_group_memberships(
+    group_id: str,
+    effective_at: datetime | None = None,
+    relationship_kind: list[str] = Query(default=["member"]),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_any_scope(*RELATIONSHIP_READ_SCOPES)),
+) -> TypedGroupMembershipResolutionItem:
+    _tenant_row(
+        session, IdmTypedGroup, group_id, principal.tenant_id, "Typed group"
+    )
+    resolved = _relationship_directory().resolve_typed_group_memberships(
+        (group_id,),
+        tenant_id=principal.tenant_id,
+        effective_at=effective_at,
+        relationship_kinds=tuple(relationship_kind),
+    )[group_id]
+    return TypedGroupMembershipResolutionItem(
+        group=_typed_group_ref_item(resolved.group),
+        effective_at=resolved.effective_at,
+        decisions=[_decision_item(item) for item in resolved.decisions],
+        identity_ids=list(resolved.identity_ids),
+    )
+
+
+__all__ = ["router"]

src/govoplan_idm/backend/api/v1/routes.py

@@ -4,7 +4,6 @@ from typing import Any, TypeVar
 
 from fastapi import APIRouter, Depends, HTTPException, Query, status
 from fastapi.encoders import jsonable_encoder
-from sqlalchemy import func, or_
 from sqlalchemy.exc import IntegrityError
 from sqlalchemy.orm import Session
 
@@ -17,11 +16,33 @@ from govoplan_core.core.configuration_control import (
     ensure_configuration_change_allowed,
     record_configuration_change_applied,
 )
+from govoplan_core.core.principal_cache import invalidate_auth_principals
+from govoplan_core.core.identity import (
+    CAPABILITY_IDENTITY_DIRECTORY,
+    CAPABILITY_IDENTITY_SEARCH,
+    IdentityDirectory,
+    IdentityRef,
+    IdentitySearchProvider,
+)
+from govoplan_core.core.organizations import (
+    CAPABILITY_ORGANIZATION_DIRECTORY,
+    OrganizationDirectory,
+    OrganizationFunctionRef,
+)
 from govoplan_core.core.runtime import get_registry
 from govoplan_core.db.session import get_session
-from govoplan_identity.backend.db.models import Identity, IdentityAccountLink
+from govoplan_core.security.time import utc_now
+from govoplan_idm.backend.assignment_transitions import (
+    AssignmentMutationPlan,
+    AssignmentTransitionError,
+    assignment_is_expired,
+    lifecycle_event_types,
+    plan_assignment_update,
+    validate_assignment_shape,
+    validate_assignment_source_rules,
+)
+from govoplan_idm.backend.assignment_events import emit_assignment_event
 from govoplan_idm.backend.db.models import IdmOrganizationFunctionAssignment, IdmTenantSettings
-from govoplan_organizations.backend.db.models import OrganizationFunction
 
 from .schemas import (
     IdmSettingsItem,
@@ -54,8 +75,6 @@ IDM_SETTINGS_READ_SCOPES = (
 IDM_SETTINGS_WRITE_SCOPES = ("idm:settings:write",)
 IDM_ASSIGNMENT_CHANGE_CONTROL_KEY = "idm.organization_assignments"
 IDM_ASSIGNMENT_AUDIT_EVENT = "idm.organization_assignment.updated"
-ASSIGNMENT_SOURCES = {"direct", "delegated", "acting_for", "directory", "governance", "system"}
-
 ModelT = TypeVar("ModelT")
 
 
@@ -87,6 +106,13 @@ def _get_tenant_row(session: Session, model: type[ModelT], item_id: str, tenant_
 
 
 def _commit(session: Session, item: ModelT) -> ModelT:
+    invalidate_auth_principals(
+        session,
+        tenant_id=getattr(item, "tenant_id", None),
+        source_module="idm",
+        resource_type=item.__class__.__name__,
+        resource_id=str(getattr(item, "id", getattr(item, "tenant_id", "system"))),
+    )
     try:
         session.commit()
     except IntegrityError as exc:
@@ -96,6 +122,40 @@ def _commit(session: Session, item: ModelT) -> ModelT:
     return item
 
 
+def _flush_assignment(
+    session: Session,
+    item: IdmOrganizationFunctionAssignment,
+) -> None:
+    try:
+        session.flush()
+    except IntegrityError as exc:
+        session.rollback()
+        raise _conflict(
+            "The IDM assignment conflicts with an existing assignment."
+        ) from exc
+
+
+def _commit_assignment_transaction(
+    session: Session,
+    item: IdmOrganizationFunctionAssignment,
+) -> None:
+    invalidate_auth_principals(
+        session,
+        tenant_id=item.tenant_id,
+        source_module="idm",
+        resource_type="organization_function_assignment",
+        resource_id=item.id,
+    )
+    try:
+        session.commit()
+    except IntegrityError as exc:
+        session.rollback()
+        raise _conflict(
+            "The IDM assignment conflicts with an existing assignment."
+        ) from exc
+    session.refresh(item)
+
+
 def _row_fields(item: object) -> dict[str, Any]:
     keys = [column.name for column in item.__table__.columns]  # type: ignore[attr-defined]
     return {key: getattr(item, key) for key in keys}
@@ -125,31 +185,76 @@ def _default_settings(tenant_id: str) -> IdmSettingsItem:
     )
 
 
-def _ensure_identity(session: Session, identity_id: str) -> None:
-    identity = session.get(Identity, identity_id)
-    if identity is None:
+def _identity_directory() -> IdentityDirectory:
+    registry = get_registry()
+    if registry is None or not registry.has_capability(CAPABILITY_IDENTITY_DIRECTORY):
+        raise HTTPException(
+            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
+            detail="Identity directory is unavailable",
+        )
+    capability = registry.require_capability(CAPABILITY_IDENTITY_DIRECTORY)
+    if not isinstance(capability, IdentityDirectory):
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=f"Invalid capability: {CAPABILITY_IDENTITY_DIRECTORY}",
+        )
+    return capability
+
+
+def _identity_search() -> IdentitySearchProvider:
+    registry = get_registry()
+    if registry is None or not registry.has_capability(CAPABILITY_IDENTITY_SEARCH):
+        raise HTTPException(
+            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
+            detail="Identity search is unavailable",
+        )
+    capability = registry.require_capability(CAPABILITY_IDENTITY_SEARCH)
+    if not isinstance(capability, IdentitySearchProvider):
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=f"Invalid capability: {CAPABILITY_IDENTITY_SEARCH}",
+        )
+    return capability
+
+
+def _organization_directory() -> OrganizationDirectory:
+    registry = get_registry()
+    if registry is None or not registry.has_capability(CAPABILITY_ORGANIZATION_DIRECTORY):
+        raise HTTPException(
+            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
+            detail="Organization directory is unavailable",
+        )
+    capability = registry.require_capability(CAPABILITY_ORGANIZATION_DIRECTORY)
+    if not isinstance(capability, OrganizationDirectory):
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=f"Invalid capability: {CAPABILITY_ORGANIZATION_DIRECTORY}",
+        )
+    return capability
+
+
+def _organization_function(function_id: str, tenant_id: str) -> OrganizationFunctionRef:
+    function = _organization_directory().get_function(function_id)
+    if function is None or function.tenant_id != tenant_id:
+        raise _not_found("Organization function")
+    return function
+
+
+def _ensure_identity(identity_id: str) -> None:
+    if _identity_directory().get_identity(identity_id) is None:
         raise _not_found("Identity")
 
 
-def _ensure_account_link(session: Session, identity_id: str, account_id: str | None) -> None:
+def _ensure_account_link(identity_id: str, account_id: str | None) -> None:
     if account_id is None:
         return
-    exists = (
-        session.query(IdentityAccountLink)
-        .filter(IdentityAccountLink.identity_id == identity_id, IdentityAccountLink.account_id == account_id)
-        .first()
-    )
-    if exists is None:
+    links = _identity_directory().accounts_for_identity(identity_id)
+    if not any(link.account_id == account_id for link in links):
         raise _invalid("Account is not linked to the selected identity.")
 
 
-def _account_linked_to_identity(session: Session, identity_id: str, account_id: str) -> bool:
-    return (
-        session.query(IdentityAccountLink)
-        .filter(IdentityAccountLink.identity_id == identity_id, IdentityAccountLink.account_id == account_id)
-        .first()
-        is not None
-    )
+def _account_linked_to_identity(identity_id: str, account_id: str) -> bool:
+    return any(link.account_id == account_id for link in _identity_directory().accounts_for_identity(identity_id))
 
 
 def _ensure_assignment_workflow(
@@ -158,50 +263,69 @@ def _ensure_assignment_workflow(
     *,
     tenant_id: str,
 ) -> None:
-    if item.source not in ASSIGNMENT_SOURCES:
-        raise _invalid("Assignment source is not supported.")
-    if item.valid_from is not None and item.valid_until is not None and item.valid_until <= item.valid_from:
-        raise _invalid("Valid until must be after valid from.")
-    if item.delegated_from_assignment_id is not None and item.delegated_from_assignment_id == item.id:
-        raise _invalid("A function assignment cannot delegate from itself.")
+    try:
+        validate_assignment_shape(item)
+        function = _organization_function(item.function_id, tenant_id)
+        base = _assignment_source_assignment(session, item, tenant_id=tenant_id)
+        validate_assignment_source_rules(
+            item,
+            function=function,
+            base=base,
+            account_linked_to_identity=_account_linked_to_identity,
+        )
+    except AssignmentTransitionError as exc:
+        raise _invalid(str(exc)) from exc
 
-    function = _get_tenant_row(session, OrganizationFunction, item.function_id, tenant_id, "Organization function")
-    base: IdmOrganizationFunctionAssignment | None = None
-    if item.delegated_from_assignment_id is not None:
-        base = _get_tenant_row(session, IdmOrganizationFunctionAssignment, item.delegated_from_assignment_id, tenant_id, "Delegated function assignment")
-        if not base.is_active:
-            raise _invalid("Delegation source assignment must be active.")
-        if base.function_id != item.function_id:
-            raise _invalid("Delegated and acting-for assignments must use the same organization function as the source assignment.")
 
-    if item.source == "delegated":
-        if base is None:
-            raise _invalid("Delegated assignments require a source assignment.")
-        if not function.delegable:
-            raise _invalid("This organization function does not allow delegation.")
-        if item.acting_for_account_id is not None:
-            raise _invalid("Delegated assignments cannot set an acting-for account.")
-        if item.identity_id == base.identity_id and (item.account_id or "") == (base.account_id or ""):
-            raise _invalid("A delegated assignment must target another identity or account.")
-    elif item.source == "acting_for":
-        if base is None:
-            raise _invalid("Acting-for assignments require a source assignment.")
-        if not function.act_in_place_allowed:
-            raise _invalid("This organization function does not allow acting in place.")
-        if item.acting_for_account_id is None:
-            raise _invalid("Acting-for assignments require an acting-for account.")
-        if base.account_id is not None:
-            if item.acting_for_account_id != base.account_id:
-                raise _invalid("Acting-for account must match the source assignment account.")
-        elif not _account_linked_to_identity(session, base.identity_id, item.acting_for_account_id):
-            raise _invalid("Acting-for account must belong to the source assignment identity.")
-        if item.account_id == item.acting_for_account_id:
-            raise _invalid("The acting account and acting-for account must be different.")
-    else:
-        if item.delegated_from_assignment_id is not None:
-            raise _invalid("Only delegated or acting-for assignments can reference a source assignment.")
-        if item.acting_for_account_id is not None:
-            raise _invalid("Only acting-for assignments can set an acting-for account.")
+def _plan_assignment_update(
+    session: Session,
+    item: IdmOrganizationFunctionAssignment,
+    payload: OrganizationFunctionAssignmentUpdateRequest,
+    *,
+    tenant_id: str,
+) -> AssignmentMutationPlan:
+    values = payload.model_dump(
+        exclude_unset=True,
+        exclude={
+            "change_request_id",
+            "governance_override_reason",
+            "governance_override_evidence",
+        },
+    )
+    organization_unit_id: str | None = None
+    if "function_id" in values and values["function_id"] is not None:
+        function = _organization_function(str(values["function_id"]), tenant_id)
+        organization_unit_id = function.organization_unit_id
+    try:
+        plan = plan_assignment_update(
+            item,
+            values,
+            organization_unit_id=organization_unit_id,
+        )
+    except AssignmentTransitionError as exc:
+        raise _invalid(str(exc)) from exc
+
+    if plan.after.identity_id != plan.before.identity_id:
+        _ensure_identity(plan.after.identity_id)
+    _ensure_account_link(plan.after.identity_id, plan.after.account_id)
+    _ensure_assignment_workflow(session, plan.after, tenant_id=tenant_id)  # type: ignore[arg-type]
+    return plan
+
+
+def _assignment_source_assignment(
+    session: Session,
+    item: IdmOrganizationFunctionAssignment,
+    *,
+    tenant_id: str,
+) -> IdmOrganizationFunctionAssignment | None:
+    if item.delegated_from_assignment_id is None:
+        return None
+    base = _get_tenant_row(session, IdmOrganizationFunctionAssignment, item.delegated_from_assignment_id, tenant_id, "Delegated function assignment")
+    if not base.is_active:
+        raise _invalid("Delegation source assignment must be active.")
+    if base.function_id != item.function_id:
+        raise _invalid("Delegated and acting-for assignments must use the same organization function as the source assignment.")
+    return base
 
 
 def _requires_assignment_change_request(session: Session, tenant_id: str) -> bool:
@@ -213,16 +337,32 @@ def _actor_id(principal: ApiPrincipal) -> str:
     return principal.membership_id or principal.account_id
 
 
-def _payload_for_control(resource_type: str, operation: str, payload: object) -> dict[str, Any]:
+def _payload_for_control(
+    resource_type: str, operation: str, payload: object
+) -> dict[str, Any]:
     if hasattr(payload, "model_dump"):
-        values = payload.model_dump(mode="json", exclude={"change_request_id"}, exclude_unset=True)  # type: ignore[attr-defined]
+        values = payload.model_dump(  # type: ignore[attr-defined]
+            mode="json",
+            exclude={
+                "change_request_id",
+                "governance_override_reason",
+                "governance_override_evidence",
+            },
+            exclude_unset=True,
+        )
     else:
         values = {}
     return {"resource_type": resource_type, "operation": operation, "payload": values}
 
 
-def _target_for_control(tenant_id: str, resource_type: str, operation: str, resource_id: str | None = None) -> dict[str, Any]:
-    target: dict[str, Any] = {"tenant_id": tenant_id, "resource_type": resource_type, "operation": operation}
+def _target_for_control(
+    tenant_id: str, resource_type: str, operation: str, resource_id: str | None = None
+) -> dict[str, Any]:
+    target: dict[str, Any] = {
+        "tenant_id": tenant_id,
+        "resource_type": resource_type,
+        "operation": operation,
+    }
     if resource_id is not None:
         target["resource_id"] = resource_id
     return target
@@ -277,7 +417,6 @@ def _record_assignment_change_applied(
         target=target,
         audit_event=IDM_ASSIGNMENT_AUDIT_EVENT,
     )
-    session.commit()
 
 
 def _audit_capability_available() -> bool:
@@ -304,10 +443,68 @@ def _record_assignment_audit(
         object_type=resource_type,
         object_id=resource_id,
         details={"before": before, "after": after},
-        commit=True,
+        commit=False,
     )
 
 
+def _publish_assignment_event(
+    session: Session,
+    principal: ApiPrincipal,
+    item: OrganizationFunctionAssignmentItem,
+    *,
+    event_type: str,
+) -> None:
+    emit_assignment_event(
+        session,
+        item,
+        event_type=event_type,
+        actor_type="account",
+        actor_id=principal.account_id,
+    )
+
+
+def _apply_governance_override(
+    principal: ApiPrincipal,
+    function: OrganizationFunctionRef,
+    payload: object,
+    settings: dict[str, Any],
+) -> dict[str, Any]:
+    governance = function.settings.get("assignment_governance")
+    if not isinstance(governance, dict) or not any(
+        str(governance.get(key) or "unavailable").strip().casefold() != "unavailable"
+        for key in ("request_profile", "grant_profile")
+    ):
+        return settings
+    if not principal.has("idm:function_change:admin"):
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail=(
+                "Direct assignment to a governed function requires function "
+                "change recovery permission."
+            ),
+        )
+    reason = str(getattr(payload, "governance_override_reason", None) or "").strip()
+    if not reason:
+        raise _invalid(
+            "Direct assignment to a governed function requires an emergency override reason."
+        )
+    evidence = [
+        str(item).strip()
+        for item in getattr(payload, "governance_override_evidence", ())
+        if str(item).strip()
+    ]
+    return {
+        **settings,
+        "governance_override": {
+            "reason": reason,
+            "evidence": evidence,
+            "actor_account_id": principal.account_id,
+            "recorded_at": utc_now().isoformat(),
+            "function_id": function.id,
+        },
+    }
+
+
 @router.get("/settings", response_model=IdmSettingsItem)
 def get_idm_settings(
     session: Session = Depends(get_session),
@@ -347,7 +544,8 @@ def update_idm_settings(
         if payload.settings is None:
             raise _invalid("Settings cannot be empty.")
         item.settings = payload.settings
-    result = _settings_item(_commit(session, item))
+    session.flush()
+    result = _settings_item(item)
     _record_assignment_audit(
         session,
         principal,
@@ -357,22 +555,48 @@ def update_idm_settings(
         before=before,
         after=result.model_dump(mode="json"),
     )
+    invalidate_auth_principals(
+        session,
+        tenant_id=tenant_id,
+        source_module="idm",
+        resource_type="tenant_settings",
+        resource_id=tenant_id,
+    )
+    session.commit()
+    session.refresh(item)
     return result
 
 
 @router.get("/organization-function-assignments", response_model=OrganizationFunctionAssignmentList)
 def list_organization_function_assignments(
+    page: int = Query(default=1, ge=1),
+    page_size: int = Query(default=500, ge=1, le=1000),
     session: Session = Depends(get_session),
     principal: ApiPrincipal = Depends(require_any_scope(*IDM_ASSIGNMENT_READ_SCOPES)),
 ) -> OrganizationFunctionAssignmentList:
     tenant_id = _tenant_id(principal)
-    assignments = (
+    query = (
         session.query(IdmOrganizationFunctionAssignment)
         .filter(IdmOrganizationFunctionAssignment.tenant_id == tenant_id)
-        .order_by(IdmOrganizationFunctionAssignment.created_at.asc())
+    )
+    total = query.order_by(None).count()
+    pages = max(1, (total + page_size - 1) // page_size)
+    assignments = (
+        query.order_by(
+            IdmOrganizationFunctionAssignment.created_at.asc(),
+            IdmOrganizationFunctionAssignment.id.asc(),
+        )
+        .offset((page - 1) * page_size)
+        .limit(page_size)
         .all()
     )
-    return OrganizationFunctionAssignmentList(assignments=[_assignment_item(item) for item in assignments])
+    return OrganizationFunctionAssignmentList(
+        assignments=[_assignment_item(item) for item in assignments],
+        total=total,
+        page=page,
+        page_size=page_size,
+        pages=pages,
+    )
 
 
 @router.post("/organization-function-assignments", response_model=OrganizationFunctionAssignmentItem, status_code=status.HTTP_201_CREATED)
@@ -383,9 +607,15 @@ def create_organization_function_assignment(
 ) -> OrganizationFunctionAssignmentItem:
     tenant_id = _tenant_id(principal)
     approval, target, _value = _ensure_assignment_change_allowed(session, principal, tenant_id=tenant_id, operation="created", payload=payload)
-    _ensure_identity(session, payload.identity_id)
-    _ensure_account_link(session, payload.identity_id, payload.account_id)
-    function = _get_tenant_row(session, OrganizationFunction, payload.function_id, tenant_id, "Organization function")
+    _ensure_identity(payload.identity_id)
+    _ensure_account_link(payload.identity_id, payload.account_id)
+    function = _organization_function(payload.function_id, tenant_id)
+    item_settings = _apply_governance_override(
+        principal,
+        function,
+        payload,
+        dict(payload.settings),
+    )
     item = IdmOrganizationFunctionAssignment(
         tenant_id=tenant_id,
         identity_id=payload.identity_id,
@@ -399,26 +629,42 @@ def create_organization_function_assignment(
         valid_from=payload.valid_from,
         valid_until=payload.valid_until,
         is_active=payload.is_active,
-        settings=payload.settings,
+        settings=item_settings,
     )
     if item.delegated_from_assignment_id is not None:
         _get_tenant_row(session, IdmOrganizationFunctionAssignment, item.delegated_from_assignment_id, tenant_id, "Delegated function assignment")
     _ensure_assignment_workflow(session, item, tenant_id=tenant_id)
     session.add(item)
-    saved = _commit(session, item)
-    result = _assignment_item(saved)
+    _flush_assignment(session, item)
+    result = _assignment_item(item)
     after = result.model_dump(mode="json")
-    _record_assignment_change_applied(session, principal, approval=approval, target={**target, "resource_id": saved.id}, before=None, after=after)
+    _record_assignment_change_applied(session, principal, approval=approval, target={**target, "resource_id": item.id}, before=None, after=after)
     _record_assignment_audit(
         session,
         principal,
         action="idm.organization_assignment.created",
         resource_type="idm_organization_function_assignment",
-        resource_id=saved.id,
+        resource_id=item.id,
         before=None,
         after=after,
     )
-    return result
+    _publish_assignment_event(
+        session,
+        principal,
+        result,
+        event_type="idm.function_assignment.created.v1",
+    )
+    now = utc_now()
+    if assignment_is_expired(item, now=now):
+        item.expired_event_at = now
+        _publish_assignment_event(
+            session,
+            principal,
+            _assignment_item(item),
+            event_type="idm.function_assignment.expired.v1",
+        )
+    _commit_assignment_transaction(session, item)
+    return _assignment_item(item)
 
 
 @router.patch("/organization-function-assignments/{assignment_id}", response_model=OrganizationFunctionAssignmentItem)
@@ -432,44 +678,32 @@ def update_organization_function_assignment(
     item = _get_tenant_row(session, IdmOrganizationFunctionAssignment, assignment_id, tenant_id, "Organization function assignment")
     before = _jsonable(_row_fields(item))
     approval, target, _value = _ensure_assignment_change_allowed(session, principal, tenant_id=tenant_id, operation="updated", payload=payload, resource_id=assignment_id)
-    if "function_id" in payload.model_fields_set:
-        if payload.function_id is None:
-            raise _invalid("Function is required.")
-        function = _get_tenant_row(session, OrganizationFunction, payload.function_id, tenant_id, "Organization function")
-        item.function_id = function.id
-        item.organization_unit_id = function.organization_unit_id
-    identity_id = payload.identity_id if "identity_id" in payload.model_fields_set else item.identity_id
-    account_id = payload.account_id if "account_id" in payload.model_fields_set else item.account_id
-    if "identity_id" in payload.model_fields_set:
-        if payload.identity_id is None:
-            raise _invalid("Identity is required.")
-        _ensure_identity(session, payload.identity_id)
-        item.identity_id = payload.identity_id
-    _ensure_account_link(session, identity_id, account_id)
-    if "source" in payload.model_fields_set and payload.source is None:
-        raise _invalid("Assignment source is required.")
-    if "applies_to_subunits" in payload.model_fields_set and payload.applies_to_subunits is None:
-        raise _invalid("Subunit applicability cannot be empty.")
-    if "is_active" in payload.model_fields_set and payload.is_active is None:
-        raise _invalid("Active state cannot be empty.")
-    if "settings" in payload.model_fields_set and payload.settings is None:
-        raise _invalid("Settings cannot be empty.")
-    for field in (
-        "account_id",
-        "applies_to_subunits",
-        "source",
-        "delegated_from_assignment_id",
-        "acting_for_account_id",
-        "valid_from",
-        "valid_until",
-        "is_active",
-        "settings",
-    ):
-        if field in payload.model_fields_set:
-            setattr(item, field, getattr(payload, field))
-    _ensure_assignment_workflow(session, item, tenant_id=tenant_id)
-    saved = _commit(session, item)
-    result = _assignment_item(saved)
+    plan = _plan_assignment_update(
+        session,
+        item,
+        payload,
+        tenant_id=tenant_id,
+    )
+    plan.apply(item)
+    function = _organization_function(item.function_id, tenant_id)
+    item.settings = _apply_governance_override(
+        principal,
+        function,
+        payload,
+        dict(item.settings),
+    )
+    now = utc_now()
+    event_types = lifecycle_event_types(
+        plan.before,
+        plan.after,
+        now=now,
+    )
+    if "idm.function_assignment.expired.v1" in event_types:
+        item.expired_event_at = now
+    elif not assignment_is_expired(item, now=now):
+        item.expired_event_at = None
+    _flush_assignment(session, item)
+    result = _assignment_item(item)
     after = result.model_dump(mode="json")
     _record_assignment_change_applied(session, principal, approval=approval, target=target, before=before, after=after)
     _record_assignment_audit(
@@ -477,11 +711,19 @@ def update_organization_function_assignment(
         principal,
         action="idm.organization_assignment.updated",
         resource_type="idm_organization_function_assignment",
-        resource_id=saved.id,
+        resource_id=item.id,
         before=before,
         after=after,
     )
-    return result
+    for event_type in event_types:
+        _publish_assignment_event(
+            session,
+            principal,
+            result,
+            event_type=event_type,
+        )
+    _commit_assignment_transaction(session, item)
+    return _assignment_item(item)
 
 
 @router.get("/organization-identities", response_model=OrganizationIdentityCandidateList)
@@ -492,53 +734,33 @@ def list_organization_identity_candidates(
     session: Session = Depends(get_session),
     principal: ApiPrincipal = Depends(require_any_scope(*ORGANIZATION_IDENTITY_READ_SCOPES)),
 ) -> OrganizationIdentityCandidateList:
-    del principal
-    identity_query = session.query(Identity)
-    if not include_inactive:
-        identity_query = identity_query.filter(Identity.is_active.is_(True))
-    if query:
-        pattern = f"%{query.strip().casefold()}%"
-        matching_account_links = session.query(IdentityAccountLink.identity_id).filter(
-            func.lower(IdentityAccountLink.account_id).like(pattern)
-        )
-        identity_query = identity_query.filter(
-            or_(
-                func.lower(Identity.id).like(pattern),
-                func.lower(Identity.display_name).like(pattern),
-                func.lower(Identity.external_subject).like(pattern),
-                Identity.id.in_(matching_account_links),
-            )
-        )
-
-    identities = identity_query.order_by(Identity.display_name.asc(), Identity.id.asc()).limit(limit).all()
-    identity_ids = [identity.id for identity in identities]
-    links_by_identity: dict[str, list[IdentityAccountLink]] = {identity_id: [] for identity_id in identity_ids}
-    if identity_ids:
-        links = (
-            session.query(IdentityAccountLink)
-            .filter(IdentityAccountLink.identity_id.in_(identity_ids))
-            .order_by(IdentityAccountLink.is_primary.desc(), IdentityAccountLink.account_id.asc())
-            .all()
-        )
-        for link in links:
-            links_by_identity.setdefault(link.identity_id, []).append(link)
+    del session, principal
+    identities = _identity_search().search_identities(
+        query,
+        include_inactive=include_inactive,
+        limit=limit,
+    )
 
     return OrganizationIdentityCandidateList(
-        identities=[
-            _identity_candidate(identity, links_by_identity.get(identity.id, []))
-            for identity in identities
-        ]
+        identities=[_identity_candidate(identity) for identity in identities]
     )
 
 
-def _identity_candidate(identity: Identity, links: list[IdentityAccountLink]) -> OrganizationIdentityCandidate:
-    primary_link = next((link for link in links if link.is_primary), None)
+def _identity_candidate(identity: IdentityRef) -> OrganizationIdentityCandidate:
     return OrganizationIdentityCandidate(
         id=identity.id,
         display_name=identity.display_name,
         external_subject=identity.external_subject,
         source=identity.source,
-        primary_account_id=primary_link.account_id if primary_link is not None else None,
-        account_ids=[link.account_id for link in links],
-        status="active" if identity.is_active else "inactive",
+        primary_account_id=identity.primary_account_id,
+        account_ids=list(identity.account_ids),
+        status=identity.status,
     )
+
+
+from .function_changes import router as function_changes_router  # noqa: E402
+from .relationships import router as relationships_router  # noqa: E402
+
+
+router.include_router(function_changes_router)
+router.include_router(relationships_router)

src/govoplan_idm/backend/api/v1/schemas.py

@@ -37,6 +37,7 @@ class OrganizationFunctionAssignmentItem(BaseModel):
     acting_for_account_id: str | None = None
     valid_from: datetime | None = None
     valid_until: datetime | None = None
+    expired_event_at: datetime | None = None
     is_active: bool
     settings: dict[str, Any]
     created_at: datetime
@@ -45,6 +46,10 @@ class OrganizationFunctionAssignmentItem(BaseModel):
 
 class OrganizationFunctionAssignmentList(BaseModel):
     assignments: list[OrganizationFunctionAssignmentItem]
+    total: int = 0
+    page: int = 1
+    page_size: int = 500
+    pages: int = 1
 
 
 class OrganizationFunctionAssignmentCreateRequest(BaseModel):
@@ -60,6 +65,10 @@ class OrganizationFunctionAssignmentCreateRequest(BaseModel):
     is_active: bool = True
     settings: dict[str, Any] = Field(default_factory=dict)
     change_request_id: str | None = None
+    governance_override_reason: str | None = Field(default=None, max_length=4_000)
+    governance_override_evidence: list[str] = Field(
+        default_factory=list, max_length=100
+    )
 
 
 class OrganizationFunctionAssignmentUpdateRequest(BaseModel):
@@ -75,6 +84,10 @@ class OrganizationFunctionAssignmentUpdateRequest(BaseModel):
     is_active: bool | None = None
     settings: dict[str, Any] | None = None
     change_request_id: str | None = None
+    governance_override_reason: str | None = Field(default=None, max_length=4_000)
+    governance_override_evidence: list[str] = Field(
+        default_factory=list, max_length=100
+    )
 
 
 class IdmSettingsItem(BaseModel):
@@ -92,3 +105,255 @@ class IdmSettingsUpdateRequest(BaseModel):
     audit_detail_level: AuditDetailLevel | None = None
     change_retention_days: int | None = Field(default=None, ge=0)
     settings: dict[str, Any] | None = None
+
+
+class TypedGroupItem(BaseModel):
+    id: str
+    tenant_id: str
+    key: str
+    name: str
+    group_type: str
+    description: str | None = None
+    status: Literal["active", "inactive"]
+    source_provider: str
+    source_resource_type: str | None = None
+    source_resource_id: str | None = None
+    source_revision: str | None = None
+    properties: dict[str, Any]
+    provenance: dict[str, Any]
+    revision: int
+    created_at: datetime | None = None
+    updated_at: datetime | None = None
+
+
+class TypedGroupList(BaseModel):
+    groups: list[TypedGroupItem]
+    total: int
+
+
+class TypedGroupCreateRequest(BaseModel):
+    key: str = Field(min_length=1, max_length=120)
+    name: str = Field(min_length=1, max_length=255)
+    group_type: str = Field(min_length=1, max_length=80)
+    description: str | None = Field(default=None, max_length=8_000)
+    source_provider: str = Field(default="local", min_length=1, max_length=80)
+    source_resource_type: str | None = Field(default=None, max_length=120)
+    source_resource_id: str | None = Field(default=None, max_length=255)
+    source_revision: str | None = Field(default=None, max_length=255)
+    properties: dict[str, Any] = Field(default_factory=dict)
+    provenance: dict[str, Any] = Field(default_factory=dict)
+
+
+class TypedGroupUpdateRequest(BaseModel):
+    base_revision: int = Field(ge=1)
+    key: str | None = Field(default=None, min_length=1, max_length=120)
+    name: str | None = Field(default=None, min_length=1, max_length=255)
+    group_type: str | None = Field(default=None, min_length=1, max_length=80)
+    description: str | None = Field(default=None, max_length=8_000)
+    status: Literal["active", "inactive"] | None = None
+    source_provider: str | None = Field(default=None, min_length=1, max_length=80)
+    source_resource_type: str | None = Field(default=None, max_length=120)
+    source_resource_id: str | None = Field(default=None, max_length=255)
+    source_revision: str | None = Field(default=None, max_length=255)
+    properties: dict[str, Any] | None = None
+    provenance: dict[str, Any] | None = None
+
+
+class IdentityRelationshipItem(BaseModel):
+    id: str
+    tenant_id: str
+    relationship_kind: str
+    subject_identity_id: str
+    target_group_id: str | None = None
+    related_identity_id: str | None = None
+    role: str | None = None
+    valid_from: datetime | None = None
+    valid_until: datetime | None = None
+    status: Literal["active", "revoked"]
+    revoked_at: datetime | None = None
+    revoked_by: str | None = None
+    revocation_reason: str | None = None
+    expired_event_at: datetime | None = None
+    source_provider: str
+    source_resource_type: str | None = None
+    source_resource_id: str | None = None
+    source_revision: str | None = None
+    properties: dict[str, Any]
+    provenance: dict[str, Any]
+    revision: int
+    created_at: datetime | None = None
+    updated_at: datetime | None = None
+
+
+class IdentityRelationshipList(BaseModel):
+    relationships: list[IdentityRelationshipItem]
+    total: int
+
+
+class IdentityRelationshipCreateRequest(BaseModel):
+    relationship_kind: str = Field(min_length=1, max_length=80)
+    subject_identity_id: str = Field(min_length=1, max_length=36)
+    target_group_id: str | None = Field(default=None, max_length=36)
+    related_identity_id: str | None = Field(default=None, max_length=36)
+    role: str | None = Field(default=None, max_length=120)
+    valid_from: datetime | None = None
+    valid_until: datetime | None = None
+    source_provider: str = Field(default="local", min_length=1, max_length=80)
+    source_resource_type: str | None = Field(default=None, max_length=120)
+    source_resource_id: str | None = Field(default=None, max_length=255)
+    source_revision: str | None = Field(default=None, max_length=255)
+    properties: dict[str, Any] = Field(default_factory=dict)
+    provenance: dict[str, Any] = Field(default_factory=dict)
+
+
+class IdentityRelationshipUpdateRequest(BaseModel):
+    base_revision: int = Field(ge=1)
+    relationship_kind: str | None = Field(default=None, min_length=1, max_length=80)
+    target_group_id: str | None = Field(default=None, max_length=36)
+    related_identity_id: str | None = Field(default=None, max_length=36)
+    role: str | None = Field(default=None, max_length=120)
+    valid_from: datetime | None = None
+    valid_until: datetime | None = None
+    source_provider: str | None = Field(default=None, min_length=1, max_length=80)
+    source_resource_type: str | None = Field(default=None, max_length=120)
+    source_resource_id: str | None = Field(default=None, max_length=255)
+    source_revision: str | None = Field(default=None, max_length=255)
+    properties: dict[str, Any] | None = None
+    provenance: dict[str, Any] | None = None
+
+
+class IdentityRelationshipRevokeRequest(BaseModel):
+    base_revision: int = Field(ge=1)
+    reason: str = Field(min_length=1, max_length=8_000)
+
+
+class IdentityRelationshipDecisionItem(BaseModel):
+    relationship: IdentityRelationshipItem
+    included: bool
+    code: str
+    explanation: str
+    identity_status: str | None = None
+
+
+class TypedGroupMembershipResolutionItem(BaseModel):
+    group: TypedGroupItem
+    effective_at: datetime
+    decisions: list[IdentityRelationshipDecisionItem]
+    identity_ids: list[str]
+
+
+FunctionAssignmentChangeKind = Literal["request", "grant"]
+FunctionAssignmentChangeAction = Literal[
+    "approve",
+    "reject",
+    "accept",
+    "request_changes",
+    "respond",
+    "withdraw",
+    "recover",
+]
+
+
+class FunctionAssignmentChangeCreateRequest(BaseModel):
+    kind: FunctionAssignmentChangeKind
+    function_id: str = Field(min_length=1, max_length=36)
+    candidate_identity_id: str = Field(min_length=1, max_length=36)
+    candidate_account_id: str | None = Field(default=None, max_length=36)
+    justification: str = Field(min_length=1, max_length=8_000)
+    evidence: list[str] = Field(default_factory=list, max_length=100)
+    requested_valid_from: datetime | None = None
+    requested_valid_until: datetime | None = None
+    applies_to_subunits: bool = False
+    assignment_source: Literal["governance", "delegated"] = "governance"
+    represented_assignment_id: str | None = Field(default=None, max_length=36)
+    idempotency_key: str = Field(min_length=1, max_length=255)
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class FunctionAssignmentChangeActionRequest(BaseModel):
+    action: FunctionAssignmentChangeAction
+    base_revision: int = Field(ge=1)
+    comment: str | None = Field(default=None, max_length=4_000)
+    evidence: list[str] = Field(default_factory=list, max_length=100)
+
+
+class FunctionAssignmentChangeEventItem(BaseModel):
+    id: str
+    sequence: int
+    action: str
+    from_state: str | None = None
+    to_state: str
+    actor_account_id: str | None = None
+    actor_identity_id: str | None = None
+    actor_assignment_id: str | None = None
+    comment: str | None = None
+    evidence: list[str]
+    policy_decision: dict[str, Any]
+    workflow_step_id: str | None = None
+    details: dict[str, Any]
+    created_at: datetime
+
+
+class FunctionAssignmentChangeItem(BaseModel):
+    id: str
+    tenant_id: str
+    kind: FunctionAssignmentChangeKind
+    state: str
+    profile: str
+    function_id: str
+    organization_unit_id: str
+    candidate_identity_id: str
+    candidate_account_id: str | None = None
+    initiator_account_id: str
+    initiator_identity_id: str | None = None
+    represented_assignment_id: str | None = None
+    justification: str
+    evidence: list[str]
+    requested_valid_from: datetime | None = None
+    requested_valid_until: datetime | None = None
+    applies_to_subunits: bool
+    assignment_source: str
+    required_steps: list[str]
+    completed_steps: list[str]
+    policy_decision: dict[str, Any]
+    workflow_definition_id: str | None = None
+    workflow_definition_revision_id: str | None = None
+    workflow_definition_revision: int | None = None
+    workflow_definition_hash: str | None = None
+    workflow_instance_id: str | None = None
+    workflow_current_step_id: str | None = None
+    resulting_assignment_id: str | None = None
+    expires_at: datetime | None = None
+    outcome_reason: str | None = None
+    resource_revision: int
+    etag: str
+    metadata: dict[str, Any]
+    events: list[FunctionAssignmentChangeEventItem] = Field(default_factory=list)
+    available_actions: list[str] = Field(default_factory=list)
+    availability_reason: str | None = None
+    created_at: datetime
+    updated_at: datetime
+
+
+class FunctionAssignmentChangeList(BaseModel):
+    changes: list[FunctionAssignmentChangeItem]
+    total: int
+    page: int
+    page_size: int
+    pages: int
+
+
+class FunctionAssignmentCapabilityItem(BaseModel):
+    kind: FunctionAssignmentChangeKind
+    function_id: str
+    available: bool
+    reason: str | None = None
+    profile: str = "unavailable"
+    required_steps: list[str] = Field(default_factory=list)
+    requirements: list[str] = Field(default_factory=list)
+    authority_function_id: str | None = None
+    evidence_required: bool = False
+    recipient_acceptance_required: bool = False
+    maximum_validity_days: int | None = None
+    workflow_available: bool = False
+    policy_available: bool = False

src/govoplan_idm/backend/assignment_events.py

@@ -0,0 +1,87 @@
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Protocol
+
+from sqlalchemy.orm import Session
+
+from govoplan_core.core.events import (
+    EventActorRef,
+    EventObjectRef,
+    EventTenantRef,
+    PlatformEvent,
+    emit_platform_event,
+)
+
+
+class AssignmentEventSource(Protocol):
+    id: str
+    tenant_id: str
+    identity_id: str
+    account_id: str | None
+    function_id: str
+    organization_unit_id: str
+    applies_to_subunits: bool
+    source: str
+    delegated_from_assignment_id: str | None
+    acting_for_account_id: str | None
+    valid_from: datetime | None
+    valid_until: datetime | None
+    is_active: bool
+
+
+def emit_assignment_event(
+    session: Session,
+    item: AssignmentEventSource,
+    *,
+    event_type: str,
+    actor_type: str,
+    actor_id: str | None = None,
+    occurred_at: datetime | None = None,
+) -> None:
+    event_options = {"occurred_at": occurred_at} if occurred_at else {}
+    emit_platform_event(
+        session,
+        PlatformEvent(
+            type=event_type,
+            module_id="idm",
+            payload={
+                "identity_id": item.identity_id,
+                "account_id": item.account_id,
+                "function_id": item.function_id,
+                "organization_unit_id": item.organization_unit_id,
+                "applies_to_subunits": item.applies_to_subunits,
+                "source": item.source,
+                "delegated_from_assignment_id": (
+                    item.delegated_from_assignment_id
+                ),
+                "acting_for_account_id": item.acting_for_account_id,
+                "valid_from": (
+                    item.valid_from.isoformat()
+                    if item.valid_from is not None
+                    else None
+                ),
+                "valid_until": (
+                    item.valid_until.isoformat()
+                    if item.valid_until is not None
+                    else None
+                ),
+                "is_active": item.is_active,
+            },
+            actor=EventActorRef(type=actor_type, id=actor_id),
+            tenant=EventTenantRef(id=item.tenant_id),
+            subject=EventObjectRef(
+                type="organization_function",
+                id=item.function_id,
+            ),
+            resource=EventObjectRef(
+                type="organization_function_assignment",
+                id=item.id,
+            ),
+            classification="internal",
+            **event_options,
+        ),
+    )
+
+
+__all__ = ["emit_assignment_event"]

src/govoplan_idm/backend/assignment_lifecycle.py

@@ -0,0 +1,348 @@
+from __future__ import annotations
+
+from datetime import datetime
+
+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.principal_cache import invalidate_auth_principals
+from govoplan_core.core.notifications import (
+    NotificationDispatchRequest,
+    notification_dispatch_provider,
+)
+from govoplan_core.security.time import ensure_aware_utc, utc_now
+from govoplan_idm.backend.assignment_events import emit_assignment_event
+from govoplan_idm.backend.db.models import (
+    IdmFunctionAssignmentChange,
+    IdmFunctionAssignmentChangeEvent,
+    IdmIdentityRelationship,
+    IdmOrganizationFunctionAssignment,
+)
+from govoplan_idm.backend.function_assignment_changes import OPEN_STATES
+
+
+class SqlIdmAssignmentLifecycle:
+    """Claim and publish elapsed assignments exactly once per validity window."""
+
+    def __init__(self, *, registry: object | None = None) -> None:
+        self._registry = registry
+
+    def process_expired(
+        self,
+        session: object,
+        *,
+        tenant_id: str | None = None,
+        effective_at: datetime | None = None,
+        limit: int = 100,
+    ) -> dict[str, object]:
+        if not isinstance(session, Session):
+            raise TypeError("IDM assignment lifecycle requires a SQLAlchemy session")
+        if limit < 1 or limit > 1000:
+            raise ValueError("IDM assignment expiry limit must be between 1 and 1000")
+        now = ensure_aware_utc(effective_at) or utc_now()
+        query = session.query(IdmOrganizationFunctionAssignment).filter(
+            IdmOrganizationFunctionAssignment.is_active.is_(True),
+            IdmOrganizationFunctionAssignment.valid_until.is_not(None),
+            IdmOrganizationFunctionAssignment.valid_until <= now,
+            IdmOrganizationFunctionAssignment.expired_event_at.is_(None),
+        )
+        if tenant_id is not None:
+            query = query.filter(
+                IdmOrganizationFunctionAssignment.tenant_id == tenant_id
+            )
+        candidates = (
+            query.order_by(
+                IdmOrganizationFunctionAssignment.valid_until.asc(),
+                IdmOrganizationFunctionAssignment.id.asc(),
+            )
+            .limit(limit)
+            .all()
+        )
+
+        expired_ids: list[str] = []
+        touched_tenants: set[str] = set()
+        for item in candidates:
+            claimed = (
+                session.query(IdmOrganizationFunctionAssignment)
+                .filter(
+                    IdmOrganizationFunctionAssignment.id == item.id,
+                    IdmOrganizationFunctionAssignment.is_active.is_(True),
+                    IdmOrganizationFunctionAssignment.valid_until.is_not(None),
+                    IdmOrganizationFunctionAssignment.valid_until <= now,
+                    IdmOrganizationFunctionAssignment.expired_event_at.is_(None),
+                )
+                .update(
+                    {IdmOrganizationFunctionAssignment.expired_event_at: now},
+                    synchronize_session=False,
+                )
+            )
+            if claimed != 1:
+                continue
+            session.refresh(item)
+            emit_assignment_event(
+                session,
+                item,
+                event_type="idm.function_assignment.expired.v1",
+                actor_type="system",
+                occurred_at=now,
+            )
+            expired_ids.append(item.id)
+            touched_tenants.add(item.tenant_id)
+
+        for touched_tenant_id in sorted(touched_tenants):
+            invalidate_auth_principals(
+                session,
+                tenant_id=touched_tenant_id,
+                source_module="idm",
+                resource_type="organization_function_assignment_expiry",
+                resource_id=touched_tenant_id,
+            )
+        expired_change_ids = self._expire_open_changes(
+            session,
+            tenant_id=tenant_id,
+            effective_at=now,
+            limit=limit,
+        )
+        expired_relationship_ids = self._expire_relationships(
+            session,
+            tenant_id=tenant_id,
+            effective_at=now,
+            limit=limit,
+        )
+        return {
+            "selected": len(candidates),
+            "expired": len(expired_ids),
+            "assignment_ids": expired_ids,
+            "expired_changes": len(expired_change_ids),
+            "change_ids": expired_change_ids,
+            "expired_relationships": len(expired_relationship_ids),
+            "relationship_ids": expired_relationship_ids,
+        }
+
+    @staticmethod
+    def _expire_relationships(
+        session: Session,
+        *,
+        tenant_id: str | None,
+        effective_at: datetime,
+        limit: int,
+    ) -> list[str]:
+        query = session.query(IdmIdentityRelationship).filter(
+            IdmIdentityRelationship.status == "active",
+            IdmIdentityRelationship.valid_until.is_not(None),
+            IdmIdentityRelationship.valid_until <= effective_at,
+            IdmIdentityRelationship.expired_event_at.is_(None),
+        )
+        if tenant_id is not None:
+            query = query.filter(IdmIdentityRelationship.tenant_id == tenant_id)
+        candidates = (
+            query.order_by(
+                IdmIdentityRelationship.valid_until.asc(),
+                IdmIdentityRelationship.id.asc(),
+            )
+            .limit(limit)
+            .all()
+        )
+        expired_ids: list[str] = []
+        for item in candidates:
+            claimed = (
+                session.query(IdmIdentityRelationship)
+                .filter(
+                    IdmIdentityRelationship.id == item.id,
+                    IdmIdentityRelationship.status == "active",
+                    IdmIdentityRelationship.valid_until.is_not(None),
+                    IdmIdentityRelationship.valid_until <= effective_at,
+                    IdmIdentityRelationship.expired_event_at.is_(None),
+                )
+                .update(
+                    {
+                        IdmIdentityRelationship.expired_event_at: effective_at,
+                        IdmIdentityRelationship.revision: (
+                            IdmIdentityRelationship.revision + 1
+                        ),
+                    },
+                    synchronize_session=False,
+                )
+            )
+            if claimed != 1:
+                continue
+            session.refresh(item)
+            emit_platform_event(
+                session,
+                PlatformEvent(
+                    type="idm.relationship.expired.v1",
+                    module_id="idm",
+                    payload={
+                        "relationship_kind": item.relationship_kind,
+                        "target_group_id": item.target_group_id,
+                        "related_identity_id": item.related_identity_id,
+                        "revision": item.revision,
+                    },
+                    actor=EventActorRef(type="system"),
+                    tenant=EventTenantRef(id=item.tenant_id),
+                    subject=EventObjectRef(
+                        type="identity", id=item.subject_identity_id
+                    ),
+                    resource=EventObjectRef(
+                        type="identity_relationship", id=item.id
+                    ),
+                    classification="internal",
+                ),
+            )
+            invalidate_auth_principals(
+                session,
+                tenant_id=item.tenant_id,
+                source_module="idm",
+                resource_type="identity_relationship_expiry",
+                resource_id=item.id,
+            )
+            expired_ids.append(item.id)
+        return expired_ids
+
+    def _expire_open_changes(
+        self,
+        session: Session,
+        *,
+        tenant_id: str | None,
+        effective_at: datetime,
+        limit: int,
+    ) -> list[str]:
+        query = session.query(IdmFunctionAssignmentChange).filter(
+            IdmFunctionAssignmentChange.state.in_(OPEN_STATES),
+            IdmFunctionAssignmentChange.expires_at.is_not(None),
+            IdmFunctionAssignmentChange.expires_at <= effective_at,
+        )
+        if tenant_id is not None:
+            query = query.filter(IdmFunctionAssignmentChange.tenant_id == tenant_id)
+        candidates = (
+            query.order_by(
+                IdmFunctionAssignmentChange.expires_at.asc(),
+                IdmFunctionAssignmentChange.id.asc(),
+            )
+            .limit(limit)
+            .all()
+        )
+        expired_ids: list[str] = []
+        for change in candidates:
+            previous_state = change.state
+            claimed = (
+                session.query(IdmFunctionAssignmentChange)
+                .filter(
+                    IdmFunctionAssignmentChange.id == change.id,
+                    IdmFunctionAssignmentChange.state == previous_state,
+                    IdmFunctionAssignmentChange.expires_at.is_not(None),
+                    IdmFunctionAssignmentChange.expires_at <= effective_at,
+                )
+                .update(
+                    {
+                        IdmFunctionAssignmentChange.state: "expired",
+                        IdmFunctionAssignmentChange.outcome_reason: (
+                            "The governed function assignment change expired."
+                        ),
+                        IdmFunctionAssignmentChange.resource_revision: (
+                            IdmFunctionAssignmentChange.resource_revision + 1
+                        ),
+                    },
+                    synchronize_session=False,
+                )
+            )
+            if claimed != 1:
+                continue
+            session.refresh(change)
+            sequence = (
+                int(
+                    session.scalar(
+                        session.query(
+                            func.max(IdmFunctionAssignmentChangeEvent.sequence)
+                        )
+                        .filter(IdmFunctionAssignmentChangeEvent.change_id == change.id)
+                        .statement
+                    )
+                    or 0
+                )
+                + 1
+            )
+            session.add(
+                IdmFunctionAssignmentChangeEvent(
+                    tenant_id=change.tenant_id,
+                    change_id=change.id,
+                    sequence=sequence,
+                    action="expired",
+                    from_state=previous_state,
+                    to_state="expired",
+                    policy_decision=dict(change.policy_decision),
+                    details={"effective_at": effective_at.isoformat()},
+                    created_at=effective_at,
+                )
+            )
+            emit_platform_event(
+                session,
+                PlatformEvent(
+                    type="idm.function_change.expired.v1",
+                    module_id="idm",
+                    payload={
+                        "kind": change.kind,
+                        "state": change.state,
+                        "function_id": change.function_id,
+                        "candidate_identity_id": change.candidate_identity_id,
+                        "resource_revision": change.resource_revision,
+                    },
+                    actor=EventActorRef(type="system"),
+                    tenant=EventTenantRef(id=change.tenant_id),
+                    subject=EventObjectRef(
+                        type="organization_function",
+                        id=change.function_id,
+                    ),
+                    resource=EventObjectRef(
+                        type="function_assignment_change",
+                        id=change.id,
+                    ),
+                    classification="internal",
+                ),
+            )
+            self._notify_expiry(session, change)
+            expired_ids.append(change.id)
+        return expired_ids
+
+    def _notify_expiry(
+        self,
+        session: Session,
+        change: IdmFunctionAssignmentChange,
+    ) -> None:
+        provider = notification_dispatch_provider(self._registry)
+        if provider is None:
+            return
+        recipient_ids = {
+            change.initiator_account_id,
+            change.candidate_account_id,
+        }
+        for account_id in sorted(item for item in recipient_ids if item):
+            provider.enqueue_notification(
+                session,
+                NotificationDispatchRequest(
+                    tenant_id=change.tenant_id,
+                    source_module="idm",
+                    source_resource_type="function_assignment_change",
+                    source_resource_id=change.id,
+                    event_kind="function_assignment_change.expired",
+                    recipient_type="account",
+                    recipient_id=account_id,
+                    subject="Function assignment change expired",
+                    body_text=(
+                        "The governed function assignment change expired "
+                        "before all required decisions were completed."
+                    ),
+                    action_url=f"/idm?change={change.id}",
+                    payload={"change_id": change.id, "state": "expired"},
+                ),
+            )
+
+
+__all__ = ["SqlIdmAssignmentLifecycle"]

src/govoplan_idm/backend/assignment_transitions.py

@@ -0,0 +1,316 @@
+from __future__ import annotations
+
+from collections.abc import Callable, Mapping
+from dataclasses import dataclass, replace
+from datetime import datetime, timezone
+from typing import Any, Protocol
+
+from govoplan_core.core.organizations import OrganizationFunctionRef
+
+
+ASSIGNMENT_SOURCES = {
+    "direct",
+    "delegated",
+    "acting_for",
+    "directory",
+    "governance",
+    "system",
+}
+MUTABLE_ASSIGNMENT_FIELDS = (
+    "identity_id",
+    "account_id",
+    "function_id",
+    "applies_to_subunits",
+    "source",
+    "delegated_from_assignment_id",
+    "acting_for_account_id",
+    "valid_from",
+    "valid_until",
+    "is_active",
+    "settings",
+)
+REQUIRED_UPDATE_FIELDS = {
+    "identity_id": "Identity is required.",
+    "function_id": "Function is required.",
+    "applies_to_subunits": "Subunit applicability cannot be empty.",
+    "source": "Assignment source is required.",
+    "is_active": "Active state cannot be empty.",
+    "settings": "Settings cannot be empty.",
+}
+
+
+class AssignmentTransitionError(ValueError):
+    pass
+
+
+class AssignmentLike(Protocol):
+    id: str
+    identity_id: str
+    account_id: str | None
+    function_id: str
+    organization_unit_id: str
+    applies_to_subunits: bool
+    source: str
+    delegated_from_assignment_id: str | None
+    acting_for_account_id: str | None
+    valid_from: datetime | None
+    valid_until: datetime | None
+    is_active: bool
+    settings: dict[str, Any]
+
+
+@dataclass(frozen=True, slots=True)
+class AssignmentSnapshot:
+    id: str
+    identity_id: str
+    account_id: str | None
+    function_id: str
+    organization_unit_id: str
+    applies_to_subunits: bool
+    source: str
+    delegated_from_assignment_id: str | None
+    acting_for_account_id: str | None
+    valid_from: datetime | None
+    valid_until: datetime | None
+    is_active: bool
+    settings: dict[str, Any]
+
+    @classmethod
+    def from_assignment(cls, item: AssignmentLike) -> AssignmentSnapshot:
+        return cls(
+            id=item.id,
+            identity_id=item.identity_id,
+            account_id=item.account_id,
+            function_id=item.function_id,
+            organization_unit_id=item.organization_unit_id,
+            applies_to_subunits=item.applies_to_subunits,
+            source=item.source,
+            delegated_from_assignment_id=item.delegated_from_assignment_id,
+            acting_for_account_id=item.acting_for_account_id,
+            valid_from=item.valid_from,
+            valid_until=item.valid_until,
+            is_active=item.is_active,
+            settings=dict(item.settings or {}),
+        )
+
+
+@dataclass(frozen=True, slots=True)
+class AssignmentMutationPlan:
+    before: AssignmentSnapshot
+    after: AssignmentSnapshot
+    changed_fields: tuple[str, ...]
+
+    def apply(self, item: AssignmentLike) -> None:
+        for field in self.changed_fields:
+            setattr(item, field, getattr(self.after, field))
+
+
+def plan_assignment_update(
+    item: AssignmentLike,
+    values: Mapping[str, object],
+    *,
+    organization_unit_id: str | None = None,
+) -> AssignmentMutationPlan:
+    before = AssignmentSnapshot.from_assignment(item)
+    updates: dict[str, object] = {}
+    for field in MUTABLE_ASSIGNMENT_FIELDS:
+        if field not in values:
+            continue
+        value = values[field]
+        message = REQUIRED_UPDATE_FIELDS.get(field)
+        if value is None and message is not None:
+            raise AssignmentTransitionError(message)
+        updates[field] = value
+    if "function_id" in updates:
+        if organization_unit_id is None:
+            raise AssignmentTransitionError(
+                "The organization unit for the selected function is required."
+            )
+        updates["organization_unit_id"] = organization_unit_id
+    if "settings" in updates:
+        updates["settings"] = dict(updates["settings"] or {})  # type: ignore[arg-type]
+
+    after = replace(before, **updates)
+    validate_assignment_shape(after)
+    changed_fields = tuple(
+        field
+        for field in (*MUTABLE_ASSIGNMENT_FIELDS, "organization_unit_id")
+        if getattr(before, field) != getattr(after, field)
+    )
+    return AssignmentMutationPlan(
+        before=before,
+        after=after,
+        changed_fields=changed_fields,
+    )
+
+
+def validate_assignment_shape(item: AssignmentLike) -> None:
+    if item.source not in ASSIGNMENT_SOURCES:
+        raise AssignmentTransitionError("Assignment source is not supported.")
+    if (
+        item.valid_from is not None
+        and item.valid_until is not None
+        and _comparable_datetime(item.valid_until)
+        <= _comparable_datetime(item.valid_from)
+    ):
+        raise AssignmentTransitionError("Valid until must be after valid from.")
+    if (
+        item.delegated_from_assignment_id is not None
+        and item.delegated_from_assignment_id == item.id
+    ):
+        raise AssignmentTransitionError(
+            "A function assignment cannot delegate from itself."
+        )
+
+
+def validate_assignment_source_rules(
+    item: AssignmentLike,
+    *,
+    function: OrganizationFunctionRef,
+    base: AssignmentLike | None,
+    account_linked_to_identity: Callable[[str, str], bool],
+) -> None:
+    if item.source == "delegated":
+        _validate_delegated_assignment(item, function=function, base=base)
+        return
+    if item.source == "acting_for":
+        _validate_acting_for_assignment(
+            item,
+            function=function,
+            base=base,
+            account_linked_to_identity=account_linked_to_identity,
+        )
+        return
+    if item.delegated_from_assignment_id is not None:
+        raise AssignmentTransitionError(
+            "Only delegated or acting-for assignments can reference a source assignment."
+        )
+    if item.acting_for_account_id is not None:
+        raise AssignmentTransitionError(
+            "Only acting-for assignments can set an acting-for account."
+        )
+
+
+def lifecycle_event_types(
+    before: AssignmentSnapshot,
+    after: AssignmentSnapshot,
+    *,
+    now: datetime,
+) -> tuple[str, ...]:
+    events = ["idm.function_assignment.changed.v1"]
+    if before.is_active and not after.is_active:
+        events.append("idm.function_assignment.revoked.v1")
+    before_expired = _is_expired(before, now=now)
+    after_expired = _is_expired(after, now=now)
+    if after_expired and (
+        not before_expired or before.valid_until != after.valid_until
+    ):
+        events.append("idm.function_assignment.expired.v1")
+    return tuple(events)
+
+
+def assignment_is_expired(
+    item: AssignmentLike | AssignmentSnapshot,
+    *,
+    now: datetime,
+) -> bool:
+    return _is_expired(item, now=now)
+
+
+def _is_expired(
+    item: AssignmentLike | AssignmentSnapshot,
+    *,
+    now: datetime,
+) -> bool:
+    return bool(
+        item.is_active
+        and item.valid_until is not None
+        and _comparable_datetime(item.valid_until) <= _comparable_datetime(now)
+    )
+
+
+def _validate_delegated_assignment(
+    item: AssignmentLike,
+    *,
+    function: OrganizationFunctionRef,
+    base: AssignmentLike | None,
+) -> None:
+    if base is None:
+        raise AssignmentTransitionError(
+            "Delegated assignments require a source assignment."
+        )
+    if not function.delegable:
+        raise AssignmentTransitionError(
+            "This organization function does not allow delegation."
+        )
+    if item.acting_for_account_id is not None:
+        raise AssignmentTransitionError(
+            "Delegated assignments cannot set an acting-for account."
+        )
+    if item.identity_id == base.identity_id and (item.account_id or "") == (
+        base.account_id or ""
+    ):
+        raise AssignmentTransitionError(
+            "A delegated assignment must target another identity or account."
+        )
+
+
+def _validate_acting_for_assignment(
+    item: AssignmentLike,
+    *,
+    function: OrganizationFunctionRef,
+    base: AssignmentLike | None,
+    account_linked_to_identity: Callable[[str, str], bool],
+) -> None:
+    if base is None:
+        raise AssignmentTransitionError(
+            "Acting-for assignments require a source assignment."
+        )
+    if not function.act_in_place_allowed:
+        raise AssignmentTransitionError(
+            "This organization function does not allow acting in place."
+        )
+    if item.acting_for_account_id is None:
+        raise AssignmentTransitionError(
+            "Acting-for assignments require an acting-for account."
+        )
+    if (
+        base.account_id is not None
+        and item.acting_for_account_id != base.account_id
+    ):
+        raise AssignmentTransitionError(
+            "Acting-for account must match the source assignment account."
+        )
+    if (
+        base.account_id is None
+        and not account_linked_to_identity(
+            base.identity_id,
+            item.acting_for_account_id,
+        )
+    ):
+        raise AssignmentTransitionError(
+            "Acting-for account must belong to the source assignment identity."
+        )
+    if item.account_id == item.acting_for_account_id:
+        raise AssignmentTransitionError(
+            "The acting account and acting-for account must be different."
+        )
+
+
+def _comparable_datetime(value: datetime) -> datetime:
+    if value.tzinfo is None:
+        return value.replace(tzinfo=timezone.utc)
+    return value.astimezone(timezone.utc)
+
+
+__all__ = [
+    "ASSIGNMENT_SOURCES",
+    "AssignmentMutationPlan",
+    "AssignmentSnapshot",
+    "AssignmentTransitionError",
+    "assignment_is_expired",
+    "lifecycle_event_types",
+    "plan_assignment_update",
+    "validate_assignment_shape",
+    "validate_assignment_source_rules",
+]

src/govoplan_idm/backend/db/models.py

@@ -4,9 +4,21 @@ import uuid
 from datetime import datetime
 from typing import Any
 
-from sqlalchemy import Boolean, DateTime, ForeignKey, Integer, JSON, String, UniqueConstraint
+from sqlalchemy import (
+    Boolean,
+    CheckConstraint,
+    DateTime,
+    ForeignKey,
+    Index,
+    Integer,
+    JSON,
+    String,
+    Text,
+    UniqueConstraint,
+)
 from sqlalchemy.orm import Mapped, mapped_column
 
+from govoplan_core.core.concurrency import strong_resource_etag
 from govoplan_core.db.base import Base, TimestampMixin
 
 
@@ -24,6 +36,12 @@ class IdmOrganizationFunctionAssignment(Base, TimestampMixin):
             "organization_unit_id",
             name="uq_idm_org_function_assignments_identity_scope",
         ),
+        Index(
+            "ix_idm_org_function_assignments_expiry_due",
+            "is_active",
+            "expired_event_at",
+            "valid_until",
+        ),
     )
 
     id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
@@ -38,10 +56,123 @@ class IdmOrganizationFunctionAssignment(Base, TimestampMixin):
     acting_for_account_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
     valid_from: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
     valid_until: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    expired_event_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
     is_active: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
     settings: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict, nullable=False)
 
 
+class IdmTypedGroup(Base, TimestampMixin):
+    __tablename__ = "idm_typed_groups"
+    __table_args__ = (
+        UniqueConstraint(
+            "tenant_id",
+            "group_type",
+            "key",
+            name="uq_idm_typed_groups_tenant_type_key",
+        ),
+        Index(
+            "ix_idm_typed_groups_tenant_status_name",
+            "tenant_id",
+            "status",
+            "name",
+        ),
+    )
+
+    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)
+    key: Mapped[str] = mapped_column(String(120), nullable=False)
+    name: Mapped[str] = mapped_column(String(255), nullable=False)
+    group_type: Mapped[str] = mapped_column(String(80), nullable=False, index=True)
+    description: Mapped[str | None] = mapped_column(Text, nullable=True)
+    status: Mapped[str] = mapped_column(String(20), default="active", nullable=False)
+    source_provider: Mapped[str] = mapped_column(String(80), default="local", nullable=False)
+    source_resource_type: Mapped[str | None] = mapped_column(String(120), nullable=True)
+    source_resource_id: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    source_revision: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    properties: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict, nullable=False)
+    provenance: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict, nullable=False)
+    revision: Mapped[int] = mapped_column(Integer, default=1, nullable=False)
+
+    @property
+    def strong_etag(self) -> str:
+        return strong_resource_etag("idm_typed_group", self.id, self.revision)
+
+
+class IdmIdentityRelationship(Base, TimestampMixin):
+    __tablename__ = "idm_identity_relationships"
+    __table_args__ = (
+        CheckConstraint(
+            "((target_group_id IS NOT NULL AND related_identity_id IS NULL) OR "
+            "(target_group_id IS NULL AND related_identity_id IS NOT NULL))",
+            name="ck_idm_relationship_exactly_one_target",
+        ),
+        CheckConstraint(
+            "valid_until IS NULL OR valid_from IS NULL OR valid_until > valid_from",
+            name="ck_idm_relationship_valid_window",
+        ),
+        Index(
+            "ix_idm_relationships_tenant_subject_effective",
+            "tenant_id",
+            "subject_identity_id",
+            "status",
+            "valid_from",
+            "valid_until",
+        ),
+        Index(
+            "ix_idm_relationships_tenant_group_effective",
+            "tenant_id",
+            "target_group_id",
+            "status",
+            "valid_from",
+            "valid_until",
+        ),
+        Index(
+            "ix_idm_relationships_expiry_due",
+            "status",
+            "expired_event_at",
+            "valid_until",
+        ),
+    )
+
+    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)
+    relationship_kind: Mapped[str] = mapped_column(String(80), nullable=False, index=True)
+    subject_identity_id: Mapped[str] = mapped_column(
+        ForeignKey("identity_identities.id", ondelete="CASCADE"),
+        nullable=False,
+        index=True,
+    )
+    target_group_id: Mapped[str | None] = mapped_column(
+        ForeignKey("idm_typed_groups.id", ondelete="CASCADE"),
+        nullable=True,
+        index=True,
+    )
+    related_identity_id: Mapped[str | None] = mapped_column(
+        ForeignKey("identity_identities.id", ondelete="CASCADE"),
+        nullable=True,
+        index=True,
+    )
+    role: Mapped[str | None] = mapped_column(String(120), nullable=True)
+    valid_from: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    valid_until: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    status: Mapped[str] = mapped_column(String(20), default="active", nullable=False)
+    revoked_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    revoked_by: Mapped[str | None] = mapped_column(String(36), nullable=True)
+    revocation_reason: Mapped[str | None] = mapped_column(Text, nullable=True)
+    expired_event_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    source_provider: Mapped[str] = mapped_column(String(80), default="local", nullable=False)
+    source_resource_type: Mapped[str | None] = mapped_column(String(120), nullable=True)
+    source_resource_id: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    source_revision: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    properties: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict, nullable=False)
+    provenance: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict, nullable=False)
+    revision: Mapped[int] = mapped_column(Integer, default=1, nullable=False)
+
+    @property
+    def strong_etag(self) -> str:
+        return strong_resource_etag("idm_identity_relationship", self.id, self.revision)
+
+
 class IdmTenantSettings(Base, TimestampMixin):
     __tablename__ = "idm_tenant_settings"
 
@@ -52,4 +183,182 @@ class IdmTenantSettings(Base, TimestampMixin):
     settings: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict, nullable=False)
 
 
-__all__ = ["IdmOrganizationFunctionAssignment", "IdmTenantSettings", "new_uuid"]
+class IdmFunctionAssignmentChange(Base, TimestampMixin):
+    __tablename__ = "idm_function_assignment_changes"
+    __table_args__ = (
+        UniqueConstraint(
+            "tenant_id",
+            "kind",
+            "initiator_account_id",
+            "idempotency_key",
+            name="uq_idm_function_assignment_change_idempotency",
+        ),
+        Index(
+            "ix_idm_function_assignment_changes_tenant_state",
+            "tenant_id",
+            "state",
+            "updated_at",
+        ),
+        Index(
+            "ix_idm_function_assignment_changes_candidate",
+            "tenant_id",
+            "candidate_identity_id",
+            "state",
+        ),
+        Index(
+            "ix_idm_function_assignment_changes_expiry",
+            "state",
+            "expires_at",
+        ),
+    )
+
+    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)
+    kind: Mapped[str] = mapped_column(String(20), nullable=False, index=True)
+    state: Mapped[str] = mapped_column(String(40), nullable=False, index=True)
+    profile: Mapped[str] = mapped_column(String(60), nullable=False)
+    function_id: Mapped[str] = mapped_column(
+        ForeignKey("organizations_functions.id", ondelete="RESTRICT"),
+        nullable=False,
+        index=True,
+    )
+    organization_unit_id: Mapped[str] = mapped_column(
+        String(36), nullable=False, index=True
+    )
+    candidate_identity_id: Mapped[str] = mapped_column(
+        ForeignKey("identity_identities.id", ondelete="RESTRICT"),
+        nullable=False,
+        index=True,
+    )
+    candidate_account_id: Mapped[str | None] = mapped_column(
+        String(36), nullable=True, index=True
+    )
+    initiator_account_id: Mapped[str] = mapped_column(
+        String(36), nullable=False, index=True
+    )
+    initiator_identity_id: Mapped[str | None] = mapped_column(
+        String(36), nullable=True, index=True
+    )
+    represented_assignment_id: Mapped[str | None] = mapped_column(
+        ForeignKey("idm_organization_function_assignments.id", ondelete="SET NULL"),
+        nullable=True,
+        index=True,
+    )
+    justification: Mapped[str] = mapped_column(Text, nullable=False)
+    evidence: Mapped[list[str]] = mapped_column(JSON, default=list, nullable=False)
+    requested_valid_from: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True
+    )
+    requested_valid_until: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True
+    )
+    applies_to_subunits: Mapped[bool] = mapped_column(
+        Boolean, default=False, nullable=False
+    )
+    assignment_source: Mapped[str] = mapped_column(
+        String(50), default="governance", nullable=False
+    )
+    required_steps: Mapped[list[str]] = mapped_column(
+        JSON, default=list, nullable=False
+    )
+    completed_steps: Mapped[list[str]] = mapped_column(
+        JSON, default=list, nullable=False
+    )
+    policy_decision: Mapped[dict[str, Any]] = mapped_column(
+        JSON, default=dict, nullable=False
+    )
+    workflow_definition_id: Mapped[str | None] = mapped_column(
+        String(36), nullable=True, index=True
+    )
+    workflow_definition_revision_id: Mapped[str | None] = mapped_column(
+        String(36), nullable=True
+    )
+    workflow_definition_revision: Mapped[int | None] = mapped_column(
+        Integer, nullable=True
+    )
+    workflow_definition_hash: Mapped[str | None] = mapped_column(
+        String(64), nullable=True
+    )
+    workflow_instance_id: Mapped[str | None] = mapped_column(
+        String(36), nullable=True, unique=True
+    )
+    workflow_current_step_id: Mapped[str | None] = mapped_column(
+        String(36), nullable=True
+    )
+    resulting_assignment_id: Mapped[str | None] = mapped_column(
+        ForeignKey("idm_organization_function_assignments.id", ondelete="SET NULL"),
+        nullable=True,
+        index=True,
+    )
+    idempotency_key: Mapped[str] = mapped_column(String(255), nullable=False)
+    expires_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True
+    )
+    outcome_reason: Mapped[str | None] = mapped_column(Text, nullable=True)
+    resource_revision: Mapped[int] = mapped_column(Integer, default=1, nullable=False)
+    metadata_: Mapped[dict[str, Any]] = mapped_column(
+        "metadata", JSON, default=dict, nullable=False
+    )
+
+    @property
+    def strong_etag(self) -> str:
+        return strong_resource_etag(
+            "idm_function_assignment_change",
+            self.id,
+            self.resource_revision,
+        )
+
+
+class IdmFunctionAssignmentChangeEvent(Base):
+    __tablename__ = "idm_function_assignment_change_events"
+    __table_args__ = (
+        UniqueConstraint(
+            "change_id",
+            "sequence",
+            name="uq_idm_function_assignment_change_event_sequence",
+        ),
+        Index(
+            "ix_idm_function_assignment_change_events_tenant_change",
+            "tenant_id",
+            "change_id",
+            "sequence",
+        ),
+    )
+
+    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)
+    change_id: Mapped[str] = mapped_column(
+        ForeignKey("idm_function_assignment_changes.id", ondelete="CASCADE"),
+        nullable=False,
+        index=True,
+    )
+    sequence: Mapped[int] = mapped_column(Integer, nullable=False)
+    action: Mapped[str] = mapped_column(String(50), nullable=False, index=True)
+    from_state: Mapped[str | None] = mapped_column(String(40), nullable=True)
+    to_state: Mapped[str] = mapped_column(String(40), nullable=False)
+    actor_account_id: Mapped[str | None] = mapped_column(
+        String(36), nullable=True, index=True
+    )
+    actor_identity_id: Mapped[str | None] = mapped_column(String(36), nullable=True)
+    actor_assignment_id: Mapped[str | None] = mapped_column(String(36), nullable=True)
+    comment: Mapped[str | None] = mapped_column(Text, nullable=True)
+    evidence: Mapped[list[str]] = mapped_column(JSON, default=list, nullable=False)
+    policy_decision: Mapped[dict[str, Any]] = mapped_column(
+        JSON, default=dict, nullable=False
+    )
+    workflow_step_id: Mapped[str | None] = mapped_column(String(36), nullable=True)
+    details: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict, nullable=False)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False
+    )
+
+
+__all__ = [
+    "IdmFunctionAssignmentChange",
+    "IdmFunctionAssignmentChangeEvent",
+    "IdmIdentityRelationship",
+    "IdmOrganizationFunctionAssignment",
+    "IdmTenantSettings",
+    "IdmTypedGroup",
+    "new_uuid",
+]

src/govoplan_idm/backend/directory.py

@@ -1,13 +1,20 @@
 from __future__ import annotations
 
+from collections.abc import Sequence
+from datetime import datetime
+
 from sqlalchemy import or_
 
-from govoplan_core.core.idm import IdmDirectory, OrganizationFunctionAssignmentRef
+from govoplan_core.core.identity import IdentityDirectory
+from govoplan_core.core.idm import (
+    IdmDirectory,
+    OrganizationFunctionAssignmentRef,
+    OrganizationFunctionIncumbencyRef,
+)
+from govoplan_core.core.organizations import OrganizationDirectory
 from govoplan_core.db.session import get_database
 from govoplan_core.security.time import utc_now
-from govoplan_identity.backend.db.models import IdentityAccountLink
 from govoplan_idm.backend.db.models import IdmOrganizationFunctionAssignment
-from govoplan_organizations.backend.db.models import OrganizationFunction
 
 
 def _status(active: bool) -> str:
@@ -33,6 +40,10 @@ def _assignment_ref(item: IdmOrganizationFunctionAssignment) -> OrganizationFunc
 
 
 class SqlIdmDirectory(IdmDirectory):
+    def __init__(self, *, identities: IdentityDirectory, organizations: OrganizationDirectory) -> None:
+        self._identities = identities
+        self._organizations = organizations
+
     def get_organization_function_assignment(self, assignment_id: str) -> OrganizationFunctionAssignmentRef | None:
         with get_database().session() as session:
             item = session.get(IdmOrganizationFunctionAssignment, assignment_id)
@@ -43,51 +54,263 @@ class SqlIdmDirectory(IdmDirectory):
         identity_id: str,
         *,
         tenant_id: str | None = None,
+        effective_at: datetime | None = None,
     ) -> tuple[OrganizationFunctionAssignmentRef, ...]:
-        return self._assignments_for_identity_ids(identity_ids=(identity_id,), tenant_id=tenant_id)
+        return tuple(
+            self.organization_function_assignments_for_identities(
+                (identity_id,),
+                tenant_id=tenant_id,
+                effective_at=effective_at,
+            ).get(identity_id, ())
+        )
 
     def organization_function_assignments_for_account(
         self,
         account_id: str,
         *,
         tenant_id: str | None = None,
+        effective_at: datetime | None = None,
     ) -> tuple[OrganizationFunctionAssignmentRef, ...]:
-        with get_database().session() as session:
-            identity_ids = [
-                row[0]
-                for row in session.query(IdentityAccountLink.identity_id)
-                .filter(IdentityAccountLink.account_id == account_id)
-                .all()
-            ]
-        if not identity_ids:
-            return ()
-        return self._assignments_for_identity_ids(identity_ids=tuple(identity_ids), tenant_id=tenant_id, account_id=account_id)
+        return tuple(
+            self.organization_function_assignments_for_accounts(
+                (account_id,),
+                tenant_id=tenant_id,
+                effective_at=effective_at,
+            ).get(account_id, ())
+        )
 
-    def _assignments_for_identity_ids(
+    def organization_function_assignments_for_identities(
         self,
+        identity_ids: Sequence[str],
         *,
-        identity_ids: tuple[str, ...],
         tenant_id: str | None = None,
-        account_id: str | None = None,
-    ) -> tuple[OrganizationFunctionAssignmentRef, ...]:
-        if not identity_ids:
-            return ()
-        now = utc_now()
+        effective_at: datetime | None = None,
+    ) -> dict[str, tuple[OrganizationFunctionAssignmentRef, ...]]:
+        requested = tuple(dict.fromkeys(identity_ids))
+        result: dict[str, list[OrganizationFunctionAssignmentRef]] = {
+            identity_id: [] for identity_id in requested
+        }
+        if not requested:
+            return {}
         with get_database().session() as session:
-            query = (
-                session.query(IdmOrganizationFunctionAssignment)
-                .join(OrganizationFunction, OrganizationFunction.id == IdmOrganizationFunctionAssignment.function_id)
-                .filter(
-                    IdmOrganizationFunctionAssignment.identity_id.in_(identity_ids),
-                    IdmOrganizationFunctionAssignment.is_active.is_(True),
-                    OrganizationFunction.is_active.is_(True),
-                    or_(IdmOrganizationFunctionAssignment.valid_from.is_(None), IdmOrganizationFunctionAssignment.valid_from <= now),
-                    or_(IdmOrganizationFunctionAssignment.valid_until.is_(None), IdmOrganizationFunctionAssignment.valid_until > now),
-                )
-                .order_by(IdmOrganizationFunctionAssignment.created_at.asc())
+            items = self._effective_assignment_items(
+                session,
+                tenant_id=tenant_id,
+                effective_at=effective_at or utc_now(),
+                identity_ids=requested,
             )
-            if account_id is not None:
-                query = query.filter(or_(IdmOrganizationFunctionAssignment.account_id.is_(None), IdmOrganizationFunctionAssignment.account_id == account_id))
-            if tenant_id is not None:
-                query = query.filter(IdmOrganizationFunctionAssignment.tenant_id == tenant_id)
-            return tuple(_assignment_ref(item) for item in query.all())
+        for item in items:
+            result[item.identity_id].append(_assignment_ref(item))
+        return {
+            identity_id: tuple(assignments)
+            for identity_id, assignments in result.items()
+        }
+
+    def organization_function_assignments_for_accounts(
+        self,
+        account_ids: Sequence[str],
+        *,
+        tenant_id: str | None = None,
+        effective_at: datetime | None = None,
+    ) -> dict[str, tuple[OrganizationFunctionAssignmentRef, ...]]:
+        requested = tuple(dict.fromkeys(account_ids))
+        result: dict[str, list[OrganizationFunctionAssignmentRef]] = {
+            account_id: [] for account_id in requested
+        }
+        if not requested:
+            return {}
+        identities = self._identities.identities_for_accounts(requested)
+        identity_ids_by_account: dict[str, set[str]] = {
+            account_id: set() for account_id in requested
+        }
+        requested_set = set(requested)
+        for identity in identities:
+            linked_accounts = set(identity.account_ids)
+            if identity.primary_account_id:
+                linked_accounts.add(identity.primary_account_id)
+            for account_id in linked_accounts & requested_set:
+                identity_ids_by_account[account_id].add(identity.id)
+        identity_ids = tuple(
+            dict.fromkeys(
+                identity_id
+                for values in identity_ids_by_account.values()
+                for identity_id in values
+            )
+        )
+        if not identity_ids:
+            return {
+                account_id: tuple(assignments)
+                for account_id, assignments in result.items()
+            }
+        with get_database().session() as session:
+            items = self._effective_assignment_items(
+                session,
+                tenant_id=tenant_id,
+                effective_at=effective_at or utc_now(),
+                identity_ids=identity_ids,
+            )
+        for account_id, linked_identity_ids in identity_ids_by_account.items():
+            result[account_id].extend(
+                _assignment_ref(item)
+                for item in items
+                if item.identity_id in linked_identity_ids
+                and item.account_id in {None, account_id}
+            )
+        return {
+            account_id: tuple(assignments)
+            for account_id, assignments in result.items()
+        }
+
+    def organization_function_assignments_for_function(
+        self,
+        function_id: str,
+        *,
+        tenant_id: str | None = None,
+        effective_at: datetime | None = None,
+    ) -> tuple[OrganizationFunctionAssignmentRef, ...]:
+        function = self._organizations.get_function(function_id)
+        if function is None:
+            return ()
+        if tenant_id is not None and function.tenant_id != tenant_id:
+            raise ValueError("Organization function belongs to another tenant.")
+        resolved_tenant_id = tenant_id or function.tenant_id
+        return self.organization_function_incumbencies(
+            (function_id,),
+            tenant_id=resolved_tenant_id,
+            effective_at=effective_at,
+        )[function_id].assignments
+
+    def organization_function_incumbencies(
+        self,
+        function_ids: Sequence[str],
+        *,
+        tenant_id: str,
+        effective_at: datetime | None = None,
+    ) -> dict[str, OrganizationFunctionIncumbencyRef]:
+        requested = tuple(dict.fromkeys(function_ids))
+        functions = {}
+        for function_id in requested:
+            function = self._organizations.get_function(function_id)
+            if function is None:
+                raise ValueError(
+                    f"Organization function does not exist: {function_id}"
+                )
+            if function.tenant_id != tenant_id:
+                raise ValueError(
+                    "Organization function belongs to another tenant."
+                )
+            functions[function_id] = function
+        if not requested:
+            return {}
+        with get_database().session() as session:
+            items = self._effective_assignment_items(
+                session,
+                tenant_id=tenant_id,
+                effective_at=effective_at or utc_now(),
+                function_ids=requested,
+            )
+        assignments: dict[str, list[OrganizationFunctionAssignmentRef]] = {
+            function_id: [] for function_id in requested
+        }
+        for item in items:
+            assignments[item.function_id].append(_assignment_ref(item))
+        return {
+            function_id: OrganizationFunctionIncumbencyRef(
+                tenant_id=tenant_id,
+                function_id=function_id,
+                assignments=tuple(assignments[function_id]),
+                function_active=functions[function_id].status == "active",
+            )
+            for function_id in requested
+        }
+
+    def _effective_assignment_items(
+        self,
+        session,
+        *,
+        effective_at: datetime,
+        tenant_id: str | None = None,
+        identity_ids: Sequence[str] = (),
+        function_ids: Sequence[str] = (),
+    ) -> tuple[IdmOrganizationFunctionAssignment, ...]:
+        query = (
+            session.query(IdmOrganizationFunctionAssignment)
+            .filter(
+                IdmOrganizationFunctionAssignment.is_active.is_(True),
+                or_(
+                    IdmOrganizationFunctionAssignment.valid_from.is_(None),
+                    IdmOrganizationFunctionAssignment.valid_from <= effective_at,
+                ),
+                or_(
+                    IdmOrganizationFunctionAssignment.valid_until.is_(None),
+                    IdmOrganizationFunctionAssignment.valid_until > effective_at,
+                ),
+            )
+            .order_by(IdmOrganizationFunctionAssignment.created_at.asc())
+        )
+        if identity_ids:
+            query = query.filter(
+                    IdmOrganizationFunctionAssignment.identity_id.in_(identity_ids),
+            )
+        if function_ids:
+            query = query.filter(
+                IdmOrganizationFunctionAssignment.function_id.in_(function_ids),
+            )
+        if tenant_id is not None:
+            query = query.filter(
+                IdmOrganizationFunctionAssignment.tenant_id == tenant_id
+            )
+        items = query.all()
+        source_ids = {
+            item.delegated_from_assignment_id
+            for item in items
+            if item.source in {"delegated", "acting_for"}
+            and item.delegated_from_assignment_id is not None
+        }
+        effective_sources = (
+            session.query(IdmOrganizationFunctionAssignment)
+            .filter(
+                IdmOrganizationFunctionAssignment.id.in_(source_ids),
+                IdmOrganizationFunctionAssignment.is_active.is_(True),
+                or_(
+                    IdmOrganizationFunctionAssignment.valid_from.is_(None),
+                    IdmOrganizationFunctionAssignment.valid_from <= effective_at,
+                ),
+                or_(
+                    IdmOrganizationFunctionAssignment.valid_until.is_(None),
+                    IdmOrganizationFunctionAssignment.valid_until > effective_at,
+                ),
+            )
+            .all()
+            if source_ids
+            else ()
+        )
+        effective_sources_by_id = {
+            item.id: item for item in effective_sources
+        }
+        function_cache = {}
+        active_items: list[IdmOrganizationFunctionAssignment] = []
+        for item in items:
+            if item.source in {"delegated", "acting_for"}:
+                source = effective_sources_by_id.get(
+                    item.delegated_from_assignment_id or ""
+                )
+                if (
+                    source is None
+                    or source.tenant_id != item.tenant_id
+                    or source.function_id != item.function_id
+                ):
+                    continue
+            if item.function_id not in function_cache:
+                function_cache[item.function_id] = (
+                    self._organizations.get_function(item.function_id)
+                )
+            function = function_cache[item.function_id]
+            if (
+                function is None
+                or function.status != "active"
+                or function.tenant_id != item.tenant_id
+            ):
+                continue
+            active_items.append(item)
+        return tuple(active_items)

src/govoplan_idm/backend/manifest.py

@@ -2,27 +2,70 @@ 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.idm import CAPABILITY_IDM_DIRECTORY
+from govoplan_core.core.access import (
+    CAPABILITY_AUTH_PERMISSION_EVALUATOR,
+    CAPABILITY_AUTH_PRINCIPAL_RESOLVER,
+)
+from govoplan_core.core.identity import (
+    CAPABILITY_IDENTITY_DIRECTORY,
+    CAPABILITY_IDENTITY_SEARCH,
+    IdentityDirectory,
+)
+from govoplan_core.core.idm import (
+    CAPABILITY_IDM_ASSIGNMENT_LIFECYCLE,
+    CAPABILITY_IDM_DIRECTORY,
+    CAPABILITY_IDM_FUNCTION_ASSIGNMENTS,
+    CAPABILITY_IDM_RELATIONSHIPS,
+)
+from govoplan_core.core.notifications import CAPABILITY_NOTIFICATIONS_DISPATCH
+from govoplan_core.core.policy import (
+    CAPABILITY_POLICY_FUNCTION_ASSIGNMENT_GOVERNANCE,
+)
+from govoplan_core.core.workflows import CAPABILITY_WORKFLOW_ORCHESTRATION
+from govoplan_core.core.organizations import (
+    CAPABILITY_ORGANIZATION_DIRECTORY,
+    OrganizationDirectory,
+)
+from govoplan_core.core.views import ViewSurface
 from govoplan_core.core.module_guards import persistent_table_uninstall_guard
 from govoplan_core.core.modules import (
+    DocumentationCondition,
+    DocumentationLink,
     DocumentationTopic,
     FrontendModule,
     FrontendRoute,
     MigrationSpec,
     ModuleContext,
+    ModuleInterfaceProvider,
+    ModuleInterfaceRequirement,
     ModuleManifest,
     NavItem,
     PermissionDefinition,
     RoleTemplate,
 )
+from govoplan_core.core.search import SearchSourceProviderRegistration
+from govoplan_core.core.provider_governance import declared_module_architecture
 from govoplan_core.db.base import Base
 from govoplan_idm.backend.db import models as idm_models  # noqa: F401 - populate metadata
+from govoplan_idm.backend.workflow_definitions import (
+    function_assignment_workflow_definitions,
+)
+from govoplan_idm.backend.search_source import create_idm_search_source
+
+
+MODULE_VERSION = "0.1.18"
 
 IDM_READ_SCOPES = (
     "idm:organization_assignment:read",
     "idm:organization_assignment:write",
     "idm:settings:read",
+    "idm:function_change:read",
+    "idm:function_request:create",
+    "idm:function_grant:create",
+    "idm:function_change:decide",
+    "idm:function_change:admin",
+    "idm:relationship:read",
+    "idm:relationship:write",
     "organizations:function:assign",
 )
 
@@ -67,6 +110,41 @@ PERMISSIONS = (
         "Manage IDM settings",
         "Update IDM governance and assignment-change policy settings.",
     ),
+    _permission(
+        "idm:function_change:read",
+        "View function assignment changes",
+        "View governed function requests, grants, decisions, and outcomes.",
+    ),
+    _permission(
+        "idm:function_request:create",
+        "Request organization functions",
+        "Request assignment to an eligible organization function.",
+    ),
+    _permission(
+        "idm:function_grant:create",
+        "Propose organization function grants",
+        "Bestow an organization function through its governed grant profile.",
+    ),
+    _permission(
+        "idm:function_change:decide",
+        "Decide function assignment changes",
+        "Approve, reject, or accept governed function assignment changes when eligible.",
+    ),
+    _permission(
+        "idm:function_change:admin",
+        "Recover function assignment changes",
+        "Inspect and recover blocked or failed function assignment workflows.",
+    ),
+    _permission(
+        "idm:relationship:read",
+        "View typed identity relationships",
+        "View typed groups and effective-dated identity relationships.",
+    ),
+    _permission(
+        "idm:relationship:write",
+        "Manage typed identity relationships",
+        "Create, change, revoke, and synchronize typed groups and identity relationships.",
+    ),
 )
 
 ROLE_TEMPLATES = (
@@ -80,6 +158,23 @@ ROLE_TEMPLATES = (
             "idm:organization_assignment:write",
             "idm:settings:read",
             "idm:settings:write",
+            "idm:function_change:read",
+            "idm:function_request:create",
+            "idm:function_grant:create",
+            "idm:function_change:decide",
+            "idm:function_change:admin",
+            "idm:relationship:read",
+            "idm:relationship:write",
+        ),
+    ),
+    RoleTemplate(
+        slug="idm_function_participant",
+        name="IDM function participant",
+        description="Request functions and participate in governed assignment decisions.",
+        permissions=(
+            "idm:function_change:read",
+            "idm:function_request:create",
+            "idm:function_change:decide",
         ),
     ),
 )
@@ -93,28 +188,109 @@ def _route_factory(context: ModuleContext):
 
 
 def _idm_directory(context: ModuleContext) -> object:
-    del context
     from govoplan_idm.backend.directory import SqlIdmDirectory
 
-    return SqlIdmDirectory()
+    identities = context.registry.require_capability(CAPABILITY_IDENTITY_DIRECTORY)
+    organizations = context.registry.require_capability(CAPABILITY_ORGANIZATION_DIRECTORY)
+    if not isinstance(identities, IdentityDirectory):
+        raise RuntimeError(f"Invalid capability: {CAPABILITY_IDENTITY_DIRECTORY}")
+    if not isinstance(organizations, OrganizationDirectory):
+        raise RuntimeError(f"Invalid capability: {CAPABILITY_ORGANIZATION_DIRECTORY}")
+    return SqlIdmDirectory(identities=identities, organizations=organizations)
+
+
+def _assignment_lifecycle(context: ModuleContext) -> object:
+    from govoplan_idm.backend.assignment_lifecycle import (
+        SqlIdmAssignmentLifecycle,
+    )
+
+    return SqlIdmAssignmentLifecycle(registry=context.registry)
+
+
+def _relationship_directory(context: ModuleContext) -> object:
+    from govoplan_idm.backend.relationships import SqlIdmRelationshipDirectory
+
+    identities = context.registry.require_capability(CAPABILITY_IDENTITY_DIRECTORY)
+    if not isinstance(identities, IdentityDirectory):
+        raise RuntimeError(f"Invalid capability: {CAPABILITY_IDENTITY_DIRECTORY}")
+    return SqlIdmRelationshipDirectory(identities=identities)
 
 
 manifest = ModuleManifest(
     id="idm",
     name="IDM",
-    version="0.1.8",
+    version=MODULE_VERSION,
     dependencies=("identity", "organizations"),
-    optional_dependencies=("access", "audit"),
-    required_capabilities=(CAPABILITY_AUTH_PRINCIPAL_RESOLVER, CAPABILITY_AUTH_PERMISSION_EVALUATOR),
+    optional_dependencies=(
+        "access",
+        "audit",
+        "notifications",
+        "policy",
+        "workflow_engine",
+        "search",
+    ),
+    optional_capabilities=(
+        CAPABILITY_NOTIFICATIONS_DISPATCH,
+        CAPABILITY_POLICY_FUNCTION_ASSIGNMENT_GOVERNANCE,
+        CAPABILITY_WORKFLOW_ORCHESTRATION,
+    ),
+    required_capabilities=(
+        CAPABILITY_AUTH_PRINCIPAL_RESOLVER,
+        CAPABILITY_AUTH_PERMISSION_EVALUATOR,
+        CAPABILITY_IDENTITY_DIRECTORY,
+        CAPABILITY_IDENTITY_SEARCH,
+        CAPABILITY_ORGANIZATION_DIRECTORY,
+    ),
+    provides_interfaces=(
+        ModuleInterfaceProvider(
+            name=CAPABILITY_IDM_FUNCTION_ASSIGNMENTS,
+            version="0.1.8",
+        ),
+        ModuleInterfaceProvider(
+            name=CAPABILITY_IDM_ASSIGNMENT_LIFECYCLE,
+            version=MODULE_VERSION,
+        ),
+        ModuleInterfaceProvider(
+            name=CAPABILITY_IDM_RELATIONSHIPS,
+            version="1.0.0",
+        ),
+        ModuleInterfaceProvider(
+            name="idm.function_assignment_changes",
+            version="1.0.0",
+        ),
+    ),
+    requires_interfaces=(
+        ModuleInterfaceRequirement(
+            name="search.source",
+            version_min="1.0.0",
+            version_max_exclusive="2.0.0",
+            optional=True,
+        ),
+    ),
     permissions=PERMISSIONS,
     role_templates=ROLE_TEMPLATES,
     route_factory=_route_factory,
+    search_sources=(
+        SearchSourceProviderRegistration(
+            id="idm.directory",
+            factory=create_idm_search_source,
+        ),
+    ),
     nav_items=(NavItem(path="/idm", label="IDM", icon="users", required_any=IDM_READ_SCOPES, order=72),),
     frontend=FrontendModule(
         module_id="idm",
         package_name="@govoplan/idm-webui",
         routes=(FrontendRoute(path="/idm", component="IdmPage", required_any=IDM_READ_SCOPES, order=72),),
         nav_items=(NavItem(path="/idm", label="IDM", icon="users", required_any=IDM_READ_SCOPES, order=72),),
+        view_surfaces=(
+            ViewSurface(
+                id="idm.action.view-function-assignments",
+                module_id="idm",
+                kind="action",
+                label="View function assignments",
+                order=40,
+            ),
+        ),
     ),
     migration_spec=MigrationSpec(
         module_id="idm",
@@ -125,13 +301,39 @@ manifest = ModuleManifest(
         persistent_table_uninstall_guard(
             idm_models.IdmOrganizationFunctionAssignment,
             idm_models.IdmTenantSettings,
+            idm_models.IdmFunctionAssignmentChange,
+            idm_models.IdmFunctionAssignmentChangeEvent,
+            idm_models.IdmTypedGroup,
+            idm_models.IdmIdentityRelationship,
             label="IDM",
         ),
     ),
     capability_factories={
+        CAPABILITY_IDM_ASSIGNMENT_LIFECYCLE: _assignment_lifecycle,
         CAPABILITY_IDM_DIRECTORY: _idm_directory,
+        CAPABILITY_IDM_FUNCTION_ASSIGNMENTS: _idm_directory,
+        CAPABILITY_IDM_RELATIONSHIPS: _relationship_directory,
     },
+    workflow_definitions=function_assignment_workflow_definitions(
+        module_version=MODULE_VERSION,
+    ),
     documentation=(
+        DocumentationTopic(
+            id="idm.search.directory",
+            title="Search authorized IDM records",
+            summary="Expose typed groups, effective-dated relationships, and organization-function assignments to permission-aware platform Search.",
+            body=(
+                "When Search is installed, IDM contributes bounded directory and assignment metadata without "
+                "copying unrestricted provenance payloads. Every result is tenant-bounded and rechecks the current "
+                "assignment or relationship read authority. Committed IDM lifecycle events update the derived "
+                "index, while an operator rebuild reconciles records created before Search was enabled."
+            ),
+            layer="configured",
+            documentation_types=("admin", "user"),
+            audience=("tenant_admin", "access_admin", "operator"),
+            related_modules=("search", "identity", "organizations"),
+            order=25,
+        ),
         DocumentationTopic(
             id="idm.organization_identity_bridge",
             title="Identity to organization bridge",
@@ -154,14 +356,59 @@ manifest = ModuleManifest(
             body=(
                 "Assignment links are high-impact because they can later feed access decisions. "
                 "Tenants can enable recorded change requests for assignment create and update operations. "
+                "A periodic worker emits one expiry event when a future-dated assignment elapses; the marker and event are committed together so retries remain idempotent. "
                 "The legacy organizations:function:assign scope remains accepted for transition, while new role templates should grant idm:organization_assignment:write."
             ),
             layer="configured",
             documentation_types=("admin",),
             audience=("tenant_admin", "access_admin", "operator"),
             related_modules=("identity", "organizations", "access", "audit", "policy"),
+            links=(
+                DocumentationLink(
+                    label="IDM workspace",
+                    href="/idm",
+                    kind="runtime",
+                ),
+                DocumentationLink(
+                    label="IDM settings API",
+                    href="/api/v1/idm/settings",
+                    kind="api",
+                ),
+            ),
+            metadata={
+                "kind": "reference",
+                "help_contexts": [
+                    "idm.governance.settings",
+                    "idm.assignment.change-request",
+                    "idm.assignment.emergency-override",
+                    "idm.function-change.request",
+                    "idm.function-change.grant",
+                    "idm.function-change.decision",
+                ],
+                "consequence_classes": {
+                    "governance_settings": "Changes whether direct assignment mutations require approved change evidence.",
+                    "emergency_override": "Bypasses the normal governed request or grant path and requires retained reason and evidence.",
+                    "function_decision": "Advances or terminates a governed change and retains actor, comment, policy, and workflow evidence.",
+                },
+            },
             order=27,
         ),
+        DocumentationTopic(
+            id="idm.reference.typed-relationships",
+            title="Typed groups and effective relationships",
+            summary="IDM keeps business group membership separate from identity lifecycle status.",
+            body=(
+                "Typed groups and identity relationships are tenant-scoped, effective-dated facts. "
+                "Current, future, expired, and revoked links remain explainable, including external "
+                "directory source revisions and provenance. Consumers such as Distribution Lists use "
+                "the IDM relationship capability and never infer application permissions from membership."
+            ),
+            layer="configured",
+            documentation_types=("admin", "user"),
+            audience=("tenant_admin", "operator", "module_admin"),
+            related_modules=("identity", "organizations", "dist_lists"),
+            order=28,
+        ),
         DocumentationTopic(
             id="idm.workflow.assign-function-to-identity",
             title="Assign an organization function to an identity",
@@ -170,14 +417,109 @@ manifest = ModuleManifest(
                 "Create the unit and function in Organizations first. Make sure the person and account exist in Identity. "
                 "Then create the assignment in IDM. Direct assignments state who holds the function. Delegated assignments require a source assignment and a delegable function. "
                 "Acting-for assignments require a source assignment, an acting account, and a function that allows acting in place. "
-                "Access maps accepted function facts to roles and rights; without such a mapping, the assignment is recorded but does not grant application permissions."
+                "Access maps accepted function facts to roles and rights; without such a mapping, the assignment is recorded but does not grant application permissions. "
+                "The assignment workspace uses the available application width so governance controls and assignment data remain visible together."
             ),
             layer="configured",
             documentation_types=("admin", "user"),
             audience=("tenant_admin", "access_admin", "operator", "user"),
             related_modules=("identity", "organizations", "access"),
+            conditions=(
+                DocumentationCondition(any_scopes=IDM_READ_SCOPES),
+            ),
+            links=(
+                DocumentationLink(
+                    label="IDM assignments",
+                    href="/idm",
+                    kind="runtime",
+                ),
+                DocumentationLink(
+                    label="Organization function assignments API",
+                    href="/api/v1/idm/organization-function-assignments",
+                    kind="api",
+                ),
+            ),
+            metadata={
+                "kind": "workflow",
+                "help_contexts": [
+                    "idm.route.assignments",
+                    "idm.action.view-function-assignments",
+                    "idm.blocker.permission",
+                    "idm.blocker.no-functions",
+                    "idm.blocker.identity-search",
+                ],
+            },
             order=28,
         ),
+        DocumentationTopic(
+            id="idm.reference.fields-and-consequences",
+            title="IDM assignment fields and consequences",
+            summary=(
+                "Reference for direct assignments, delegation, acting-for, "
+                "effective dates, governed changes, evidence, and retention."
+            ),
+            body=(
+                "Identity and account select who receives the institutional fact; "
+                "function and unit are owned by Organizations. Source distinguishes "
+                "direct, delegated, acting-for, directory, governance, and system facts. "
+                "Delegation and acting-for require a valid source assignment and the "
+                "corresponding function permission. Subunit scope broadens the fact's "
+                "organizational reach. Deactivation and expiry preserve provenance while "
+                "removing the assignment from effective resolution. Governed request and "
+                "grant decisions retain actor, policy, workflow revision, comments, and "
+                "evidence. An emergency override is not the normal process and must carry "
+                "an explicit reason. An IDM assignment alone never grants application "
+                "permissions; Access requires an explicit mapping."
+            ),
+            layer="configured",
+            documentation_types=("admin", "user"),
+            audience=("tenant_admin", "access_admin", "operator", "user"),
+            related_modules=("identity", "organizations", "access", "policy", "audit", "workflow_engine"),
+            links=(
+                DocumentationLink(
+                    label="Function assignment workflows",
+                    href="docs/FUNCTION_ASSIGNMENT_WORKFLOWS.md",
+                    kind="repository",
+                ),
+            ),
+            metadata={
+                "kind": "reference",
+                "help_contexts": [
+                    "idm.field.identity",
+                    "idm.field.account",
+                    "idm.field.function",
+                    "idm.field.source",
+                    "idm.field.delegation",
+                    "idm.field.acting-for",
+                    "idm.field.subunits",
+                    "idm.field.effective-dates",
+                    "idm.field.justification",
+                    "idm.field.evidence",
+                    "idm.field.retention",
+                ],
+                "consequence_classes": {
+                    "assignment": "Changes the effective institutional function fact consumed by optional downstream capabilities.",
+                    "deactivate_or_expire": "Removes the fact from effective resolution while retaining provenance and lifecycle evidence.",
+                    "delegation": "Creates a bounded derived assignment that remains tied to its source assignment.",
+                    "acting_for": "Allows a bounded account to act in place of a source assignment when Organizations permits it.",
+                    "retention": "Changes how long detailed assignment-change evidence remains available.",
+                },
+            },
+            order=29,
+        ),
+    ),
+    architecture=declared_module_architecture(
+        layer="institutional_foundation",
+        kind="foundation",
+        maturity="vertical_slice",
+        documentation_ref="docs/FUNCTION_ASSIGNMENT_WORKFLOWS.md",
+        test_ref="tests/test_assignment_workflow.py",
+        known_limits=("External directory provisioning and all authority-specific grant workflows are not reference-ready.",),
+        owned_concepts=("function assignment", "assignment delegation", "acting-for assignment", "assignment request", "typed group", "identity relationship"),
+        non_owned_concepts=("identity", "organization function", "application role", "workflow runtime"),
+        recovery_docs=("docs/FUNCTION_ASSIGNMENT_WORKFLOWS.md", "docs/TYPED_RELATIONSHIPS.md"),
+        security_docs=("docs/FUNCTION_ASSIGNMENT_WORKFLOWS.md", "docs/TYPED_RELATIONSHIPS.md"),
+        operations_docs=("README.md",),
     ),
 )
 

src/govoplan_idm/backend/migrations/dev_versions/9a0b1c2d3e4f_idm_assignment_expiry_events.py

@@ -0,0 +1,40 @@
+"""Track emitted assignment expiry events.
+
+Revision ID: 9a0b1c2d3e4f
+Revises: 8f9a0b1c2d3e
+Create Date: 2026-07-31 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "9a0b1c2d3e4f"
+down_revision = "8f9a0b1c2d3e"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "idm_organization_function_assignments",
+        sa.Column("expired_event_at", sa.DateTime(timezone=True), nullable=True),
+    )
+    op.create_index(
+        "ix_idm_org_function_assignments_expiry_due",
+        "idm_organization_function_assignments",
+        ["is_active", "expired_event_at", "valid_until"],
+        unique=False,
+    )
+
+
+def downgrade() -> None:
+    op.drop_index(
+        "ix_idm_org_function_assignments_expiry_due",
+        table_name="idm_organization_function_assignments",
+    )
+    op.drop_column(
+        "idm_organization_function_assignments",
+        "expired_event_at",
+    )

src/govoplan_idm/backend/migrations/versions/9a0b1c2d3e4f_idm_assignment_expiry_events.py

@@ -0,0 +1,40 @@
+"""Track emitted assignment expiry events.
+
+Revision ID: 9a0b1c2d3e4f
+Revises: 8f9a0b1c2d3e
+Create Date: 2026-07-31 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "9a0b1c2d3e4f"
+down_revision = "8f9a0b1c2d3e"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "idm_organization_function_assignments",
+        sa.Column("expired_event_at", sa.DateTime(timezone=True), nullable=True),
+    )
+    op.create_index(
+        "ix_idm_org_function_assignments_expiry_due",
+        "idm_organization_function_assignments",
+        ["is_active", "expired_event_at", "valid_until"],
+        unique=False,
+    )
+
+
+def downgrade() -> None:
+    op.drop_index(
+        "ix_idm_org_function_assignments_expiry_due",
+        table_name="idm_organization_function_assignments",
+    )
+    op.drop_column(
+        "idm_organization_function_assignments",
+        "expired_event_at",
+    )

src/govoplan_idm/backend/migrations/versions/a0b1c2d3e4f5_function_assignment_changes.py

@@ -0,0 +1,226 @@
+"""Add governed function assignment change aggregates.
+
+Revision ID: a0b1c2d3e4f5
+Revises: 9a0b1c2d3e4f
+Create Date: 2026-07-31 00:00:00.000000
+"""
+
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "a0b1c2d3e4f5"
+down_revision = "9a0b1c2d3e4f"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "idm_function_assignment_changes",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("kind", sa.String(length=20), nullable=False),
+        sa.Column("state", sa.String(length=40), nullable=False),
+        sa.Column("profile", sa.String(length=60), nullable=False),
+        sa.Column("function_id", sa.String(length=36), nullable=False),
+        sa.Column("organization_unit_id", sa.String(length=36), nullable=False),
+        sa.Column("candidate_identity_id", sa.String(length=36), nullable=False),
+        sa.Column("candidate_account_id", sa.String(length=36), nullable=True),
+        sa.Column("initiator_account_id", sa.String(length=36), nullable=False),
+        sa.Column("initiator_identity_id", sa.String(length=36), nullable=True),
+        sa.Column("represented_assignment_id", sa.String(length=36), nullable=True),
+        sa.Column("justification", sa.Text(), nullable=False),
+        sa.Column("evidence", sa.JSON(), nullable=False),
+        sa.Column("requested_valid_from", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("requested_valid_until", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("applies_to_subunits", sa.Boolean(), nullable=False),
+        sa.Column("assignment_source", sa.String(length=50), nullable=False),
+        sa.Column("required_steps", sa.JSON(), nullable=False),
+        sa.Column("completed_steps", sa.JSON(), nullable=False),
+        sa.Column("policy_decision", sa.JSON(), nullable=False),
+        sa.Column("workflow_definition_id", sa.String(length=36), nullable=True),
+        sa.Column(
+            "workflow_definition_revision_id", sa.String(length=36), nullable=True
+        ),
+        sa.Column("workflow_definition_revision", sa.Integer(), nullable=True),
+        sa.Column("workflow_definition_hash", sa.String(length=64), nullable=True),
+        sa.Column("workflow_instance_id", sa.String(length=36), nullable=True),
+        sa.Column("workflow_current_step_id", sa.String(length=36), nullable=True),
+        sa.Column("resulting_assignment_id", sa.String(length=36), nullable=True),
+        sa.Column("idempotency_key", sa.String(length=255), nullable=False),
+        sa.Column("expires_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("outcome_reason", sa.Text(), nullable=True),
+        sa.Column("resource_revision", sa.Integer(), nullable=False),
+        sa.Column("metadata", sa.JSON(), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["candidate_identity_id"],
+            ["identity_identities.id"],
+            name=op.f(
+                "fk_idm_function_assignment_changes_candidate_identity_id_identity_identities"
+            ),
+            ondelete="RESTRICT",
+        ),
+        sa.ForeignKeyConstraint(
+            ["function_id"],
+            ["organizations_functions.id"],
+            name=op.f(
+                "fk_idm_function_assignment_changes_function_id_organizations_functions"
+            ),
+            ondelete="RESTRICT",
+        ),
+        sa.ForeignKeyConstraint(
+            ["represented_assignment_id"],
+            ["idm_organization_function_assignments.id"],
+            name=op.f(
+                "fk_idm_function_assignment_changes_represented_assignment_id_idm_assignments"
+            ),
+            ondelete="SET NULL",
+        ),
+        sa.ForeignKeyConstraint(
+            ["resulting_assignment_id"],
+            ["idm_organization_function_assignments.id"],
+            name=op.f(
+                "fk_idm_function_assignment_changes_resulting_assignment_id_idm_assignments"
+            ),
+            ondelete="SET NULL",
+        ),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_idm_function_assignment_changes")),
+        sa.UniqueConstraint(
+            "tenant_id",
+            "kind",
+            "initiator_account_id",
+            "idempotency_key",
+            name="uq_idm_function_assignment_change_idempotency",
+        ),
+        sa.UniqueConstraint(
+            "workflow_instance_id",
+            name=op.f("uq_idm_function_assignment_changes_workflow_instance_id"),
+        ),
+    )
+    for name, columns in (
+        ("ix_idm_function_assignment_changes_tenant_id", ["tenant_id"]),
+        ("ix_idm_function_assignment_changes_kind", ["kind"]),
+        ("ix_idm_function_assignment_changes_state", ["state"]),
+        ("ix_idm_function_assignment_changes_function_id", ["function_id"]),
+        (
+            "ix_idm_function_assignment_changes_organization_unit_id",
+            ["organization_unit_id"],
+        ),
+        (
+            "ix_idm_function_assignment_changes_candidate_identity_id",
+            ["candidate_identity_id"],
+        ),
+        (
+            "ix_idm_function_assignment_changes_candidate_account_id",
+            ["candidate_account_id"],
+        ),
+        (
+            "ix_idm_function_assignment_changes_initiator_account_id",
+            ["initiator_account_id"],
+        ),
+        (
+            "ix_idm_function_assignment_changes_initiator_identity_id",
+            ["initiator_identity_id"],
+        ),
+        (
+            "ix_idm_function_assignment_changes_represented_assignment_id",
+            ["represented_assignment_id"],
+        ),
+        (
+            "ix_idm_function_assignment_changes_workflow_definition_id",
+            ["workflow_definition_id"],
+        ),
+        (
+            "ix_idm_function_assignment_changes_resulting_assignment_id",
+            ["resulting_assignment_id"],
+        ),
+        (
+            "ix_idm_function_assignment_changes_tenant_state",
+            ["tenant_id", "state", "updated_at"],
+        ),
+        (
+            "ix_idm_function_assignment_changes_candidate",
+            ["tenant_id", "candidate_identity_id", "state"],
+        ),
+        (
+            "ix_idm_function_assignment_changes_expiry",
+            ["state", "expires_at"],
+        ),
+    ):
+        op.create_index(name, "idm_function_assignment_changes", columns, unique=False)
+
+    op.create_table(
+        "idm_function_assignment_change_events",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("change_id", sa.String(length=36), nullable=False),
+        sa.Column("sequence", sa.Integer(), nullable=False),
+        sa.Column("action", sa.String(length=50), nullable=False),
+        sa.Column("from_state", sa.String(length=40), nullable=True),
+        sa.Column("to_state", sa.String(length=40), nullable=False),
+        sa.Column("actor_account_id", sa.String(length=36), nullable=True),
+        sa.Column("actor_identity_id", sa.String(length=36), nullable=True),
+        sa.Column("actor_assignment_id", sa.String(length=36), nullable=True),
+        sa.Column("comment", sa.Text(), nullable=True),
+        sa.Column("evidence", sa.JSON(), nullable=False),
+        sa.Column("policy_decision", sa.JSON(), nullable=False),
+        sa.Column("workflow_step_id", sa.String(length=36), nullable=True),
+        sa.Column("details", sa.JSON(), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["change_id"],
+            ["idm_function_assignment_changes.id"],
+            name=op.f(
+                "fk_idm_function_assignment_change_events_change_id_idm_function_assignment_changes"
+            ),
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint(
+            "id", name=op.f("pk_idm_function_assignment_change_events")
+        ),
+        sa.UniqueConstraint(
+            "change_id",
+            "sequence",
+            name="uq_idm_function_assignment_change_event_sequence",
+        ),
+    )
+    op.create_index(
+        "ix_idm_function_assignment_change_events_tenant_id",
+        "idm_function_assignment_change_events",
+        ["tenant_id"],
+        unique=False,
+    )
+    op.create_index(
+        "ix_idm_function_assignment_change_events_change_id",
+        "idm_function_assignment_change_events",
+        ["change_id"],
+        unique=False,
+    )
+    op.create_index(
+        "ix_idm_function_assignment_change_events_action",
+        "idm_function_assignment_change_events",
+        ["action"],
+        unique=False,
+    )
+    op.create_index(
+        "ix_idm_function_assignment_change_events_actor_account_id",
+        "idm_function_assignment_change_events",
+        ["actor_account_id"],
+        unique=False,
+    )
+    op.create_index(
+        "ix_idm_function_assignment_change_events_tenant_change",
+        "idm_function_assignment_change_events",
+        ["tenant_id", "change_id", "sequence"],
+        unique=False,
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("idm_function_assignment_change_events")
+    op.drop_table("idm_function_assignment_changes")

src/govoplan_idm/backend/migrations/versions/b1c2d3e4f5a6_typed_identity_relationships.py

@@ -0,0 +1,157 @@
+"""Add typed IDM groups and effective-dated relationships.
+
+Revision ID: b1c2d3e4f5a6
+Revises: a0b1c2d3e4f5
+Create Date: 2026-08-02 00:00:00.000000
+"""
+
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "b1c2d3e4f5a6"
+down_revision = "a0b1c2d3e4f5"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "idm_typed_groups",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("key", sa.String(length=120), nullable=False),
+        sa.Column("name", sa.String(length=255), nullable=False),
+        sa.Column("group_type", sa.String(length=80), nullable=False),
+        sa.Column("description", sa.Text(), nullable=True),
+        sa.Column("status", sa.String(length=20), nullable=False),
+        sa.Column("source_provider", sa.String(length=80), nullable=False),
+        sa.Column("source_resource_type", sa.String(length=120), nullable=True),
+        sa.Column("source_resource_id", sa.String(length=255), nullable=True),
+        sa.Column("source_revision", sa.String(length=255), nullable=True),
+        sa.Column("properties", sa.JSON(), nullable=False),
+        sa.Column("provenance", sa.JSON(), nullable=False),
+        sa.Column("revision", sa.Integer(), nullable=False),
+        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_idm_typed_groups")),
+        sa.UniqueConstraint(
+            "tenant_id",
+            "group_type",
+            "key",
+            name="uq_idm_typed_groups_tenant_type_key",
+        ),
+    )
+    op.create_index(
+        op.f("ix_idm_typed_groups_tenant_id"),
+        "idm_typed_groups",
+        ["tenant_id"],
+        unique=False,
+    )
+    op.create_index(
+        op.f("ix_idm_typed_groups_group_type"),
+        "idm_typed_groups",
+        ["group_type"],
+        unique=False,
+    )
+    op.create_index(
+        "ix_idm_typed_groups_tenant_status_name",
+        "idm_typed_groups",
+        ["tenant_id", "status", "name"],
+        unique=False,
+    )
+
+    op.create_table(
+        "idm_identity_relationships",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("relationship_kind", sa.String(length=80), nullable=False),
+        sa.Column("subject_identity_id", sa.String(length=36), nullable=False),
+        sa.Column("target_group_id", sa.String(length=36), nullable=True),
+        sa.Column("related_identity_id", sa.String(length=36), nullable=True),
+        sa.Column("role", sa.String(length=120), nullable=True),
+        sa.Column("valid_from", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("valid_until", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("status", sa.String(length=20), nullable=False),
+        sa.Column("revoked_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("revoked_by", sa.String(length=36), nullable=True),
+        sa.Column("revocation_reason", sa.Text(), nullable=True),
+        sa.Column("expired_event_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("source_provider", sa.String(length=80), nullable=False),
+        sa.Column("source_resource_type", sa.String(length=120), nullable=True),
+        sa.Column("source_resource_id", sa.String(length=255), nullable=True),
+        sa.Column("source_revision", sa.String(length=255), nullable=True),
+        sa.Column("properties", sa.JSON(), nullable=False),
+        sa.Column("provenance", sa.JSON(), nullable=False),
+        sa.Column("revision", sa.Integer(), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.CheckConstraint(
+            "((target_group_id IS NOT NULL AND related_identity_id IS NULL) OR "
+            "(target_group_id IS NULL AND related_identity_id IS NOT NULL))",
+            name="ck_idm_relationship_exactly_one_target",
+        ),
+        sa.CheckConstraint(
+            "valid_until IS NULL OR valid_from IS NULL OR valid_until > valid_from",
+            name="ck_idm_relationship_valid_window",
+        ),
+        sa.ForeignKeyConstraint(
+            ["subject_identity_id"],
+            ["identity_identities.id"],
+            name=op.f(
+                "fk_idm_identity_relationships_subject_identity_id_identity_identities"
+            ),
+            ondelete="CASCADE",
+        ),
+        sa.ForeignKeyConstraint(
+            ["related_identity_id"],
+            ["identity_identities.id"],
+            name=op.f(
+                "fk_idm_identity_relationships_related_identity_id_identity_identities"
+            ),
+            ondelete="CASCADE",
+        ),
+        sa.ForeignKeyConstraint(
+            ["target_group_id"],
+            ["idm_typed_groups.id"],
+            name=op.f(
+                "fk_idm_identity_relationships_target_group_id_idm_typed_groups"
+            ),
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint(
+            "id", name=op.f("pk_idm_identity_relationships")
+        ),
+    )
+    for name, columns in (
+        ("ix_idm_identity_relationships_tenant_id", ["tenant_id"]),
+        ("ix_idm_identity_relationships_relationship_kind", ["relationship_kind"]),
+        ("ix_idm_identity_relationships_subject_identity_id", ["subject_identity_id"]),
+        ("ix_idm_identity_relationships_target_group_id", ["target_group_id"]),
+        ("ix_idm_identity_relationships_related_identity_id", ["related_identity_id"]),
+        (
+            "ix_idm_relationships_tenant_subject_effective",
+            ["tenant_id", "subject_identity_id", "status", "valid_from", "valid_until"],
+        ),
+        (
+            "ix_idm_relationships_tenant_group_effective",
+            ["tenant_id", "target_group_id", "status", "valid_from", "valid_until"],
+        ),
+        (
+            "ix_idm_relationships_expiry_due",
+            ["status", "expired_event_at", "valid_until"],
+        ),
+    ):
+        op.create_index(
+            name,
+            "idm_identity_relationships",
+            columns,
+            unique=False,
+        )
+
+
+def downgrade() -> None:
+    op.drop_table("idm_identity_relationships")
+    op.drop_table("idm_typed_groups")

src/govoplan_idm/backend/relationships.py

@@ -0,0 +1,386 @@
+from __future__ import annotations
+
+from collections.abc import Sequence
+from datetime import datetime
+
+from sqlalchemy import or_
+
+from govoplan_core.core.identity import IdentityDirectory
+from govoplan_core.core.idm import (
+    IdentityRelationshipDecisionRef,
+    IdentityRelationshipRef,
+    IdmRelationshipDirectory,
+    TypedGroupMembershipResolutionRef,
+    TypedGroupRef,
+)
+from govoplan_core.db.session import get_database
+from govoplan_core.security.time import ensure_aware_utc, utc_now
+from govoplan_idm.backend.db.models import (
+    IdmIdentityRelationship,
+    IdmTypedGroup,
+)
+
+
+def typed_group_ref(item: IdmTypedGroup) -> TypedGroupRef:
+    return TypedGroupRef(
+        id=item.id,
+        tenant_id=item.tenant_id,
+        key=item.key,
+        name=item.name,
+        group_type=item.group_type,
+        description=item.description,
+        status=item.status,  # type: ignore[arg-type]
+        source_provider=item.source_provider,
+        source_resource_type=item.source_resource_type,
+        source_resource_id=item.source_resource_id,
+        source_revision=item.source_revision,
+        properties=dict(item.properties),
+        provenance=dict(item.provenance),
+        revision=item.revision,
+    )
+
+
+def identity_relationship_ref(
+    item: IdmIdentityRelationship,
+) -> IdentityRelationshipRef:
+    return IdentityRelationshipRef(
+        id=item.id,
+        tenant_id=item.tenant_id,
+        relationship_kind=item.relationship_kind,
+        subject_identity_id=item.subject_identity_id,
+        target_group_id=item.target_group_id,
+        related_identity_id=item.related_identity_id,
+        role=item.role,
+        valid_from=item.valid_from,
+        valid_until=item.valid_until,
+        status=item.status,  # type: ignore[arg-type]
+        revoked_at=item.revoked_at,
+        revoked_by=item.revoked_by,
+        revocation_reason=item.revocation_reason,
+        source_provider=item.source_provider,
+        source_resource_type=item.source_resource_type,
+        source_resource_id=item.source_resource_id,
+        source_revision=item.source_revision,
+        properties=dict(item.properties),
+        provenance=dict(item.provenance),
+        revision=item.revision,
+    )
+
+
+class SqlIdmRelationshipDirectory(IdmRelationshipDirectory):
+    def __init__(self, *, identities: IdentityDirectory) -> None:
+        self._identities = identities
+
+    def get_typed_group(
+        self,
+        group_id: str,
+        *,
+        tenant_id: str | None = None,
+    ) -> TypedGroupRef | None:
+        with get_database().session() as session:
+            item = session.get(IdmTypedGroup, group_id)
+            if item is None:
+                return None
+            if tenant_id is not None and item.tenant_id != tenant_id:
+                raise ValueError("Typed group belongs to another tenant.")
+            return typed_group_ref(item)
+
+    def list_typed_groups(
+        self,
+        *,
+        tenant_id: str,
+        query: str | None = None,
+        group_types: Sequence[str] = (),
+        include_inactive: bool = False,
+        limit: int = 100,
+    ) -> tuple[TypedGroupRef, ...]:
+        if limit < 1 or limit > 1000:
+            raise ValueError("Typed-group limit must be between 1 and 1000.")
+        with get_database().session() as session:
+            statement = session.query(IdmTypedGroup).filter(
+                IdmTypedGroup.tenant_id == tenant_id
+            )
+            if not include_inactive:
+                statement = statement.filter(IdmTypedGroup.status == "active")
+            if group_types:
+                statement = statement.filter(
+                    IdmTypedGroup.group_type.in_(tuple(dict.fromkeys(group_types)))
+                )
+            if query and query.strip():
+                pattern = f"%{query.strip()}%"
+                statement = statement.filter(
+                    or_(
+                        IdmTypedGroup.name.ilike(pattern),
+                        IdmTypedGroup.key.ilike(pattern),
+                        IdmTypedGroup.description.ilike(pattern),
+                    )
+                )
+            items = (
+                statement.order_by(
+                    IdmTypedGroup.name.asc(),
+                    IdmTypedGroup.id.asc(),
+                )
+                .limit(limit)
+                .all()
+            )
+            return tuple(typed_group_ref(item) for item in items)
+
+    def identity_relationships_for_identity(
+        self,
+        identity_id: str,
+        *,
+        tenant_id: str,
+        effective_at: datetime | None = None,
+        relationship_kinds: Sequence[str] = (),
+    ) -> tuple[IdentityRelationshipRef, ...]:
+        return tuple(
+            self.identity_relationships_for_identities(
+                (identity_id,),
+                tenant_id=tenant_id,
+                effective_at=effective_at,
+                relationship_kinds=relationship_kinds,
+            ).get(identity_id, ())
+        )
+
+    def identity_relationships_for_identities(
+        self,
+        identity_ids: Sequence[str],
+        *,
+        tenant_id: str,
+        effective_at: datetime | None = None,
+        relationship_kinds: Sequence[str] = (),
+    ) -> dict[str, tuple[IdentityRelationshipRef, ...]]:
+        requested = tuple(dict.fromkeys(identity_ids))
+        result: dict[str, list[IdentityRelationshipRef]] = {
+            identity_id: [] for identity_id in requested
+        }
+        if not requested:
+            return {}
+        with get_database().session() as session:
+            items = self._effective_relationships(
+                session,
+                tenant_id=tenant_id,
+                effective_at=effective_at or utc_now(),
+                identity_ids=requested,
+                relationship_kinds=relationship_kinds,
+            )
+            for item in items:
+                result[item.subject_identity_id].append(
+                    identity_relationship_ref(item)
+                )
+        return {key: tuple(value) for key, value in result.items()}
+
+    def identity_relationships_for_group(
+        self,
+        group_id: str,
+        *,
+        tenant_id: str,
+        effective_at: datetime | None = None,
+        relationship_kinds: Sequence[str] = (),
+    ) -> tuple[IdentityRelationshipRef, ...]:
+        return tuple(
+            self.identity_relationships_for_groups(
+                (group_id,),
+                tenant_id=tenant_id,
+                effective_at=effective_at,
+                relationship_kinds=relationship_kinds,
+            ).get(group_id, ())
+        )
+
+    def identity_relationships_for_groups(
+        self,
+        group_ids: Sequence[str],
+        *,
+        tenant_id: str,
+        effective_at: datetime | None = None,
+        relationship_kinds: Sequence[str] = (),
+    ) -> dict[str, tuple[IdentityRelationshipRef, ...]]:
+        requested = tuple(dict.fromkeys(group_ids))
+        result: dict[str, list[IdentityRelationshipRef]] = {
+            group_id: [] for group_id in requested
+        }
+        if not requested:
+            return {}
+        with get_database().session() as session:
+            self._validate_group_tenants(session, requested, tenant_id)
+            items = self._effective_relationships(
+                session,
+                tenant_id=tenant_id,
+                effective_at=effective_at or utc_now(),
+                group_ids=requested,
+                relationship_kinds=relationship_kinds,
+            )
+            for item in items:
+                if item.target_group_id is not None:
+                    result[item.target_group_id].append(
+                        identity_relationship_ref(item)
+                    )
+        return {key: tuple(value) for key, value in result.items()}
+
+    def resolve_typed_group_memberships(
+        self,
+        group_ids: Sequence[str],
+        *,
+        tenant_id: str,
+        effective_at: datetime | None = None,
+        relationship_kinds: Sequence[str] = ("member",),
+    ) -> dict[str, TypedGroupMembershipResolutionRef]:
+        requested = tuple(dict.fromkeys(group_ids))
+        if not requested:
+            return {}
+        moment = ensure_aware_utc(effective_at) or utc_now()
+        with get_database().session() as session:
+            groups = self._validate_group_tenants(session, requested, tenant_id)
+            items = (
+                session.query(IdmIdentityRelationship)
+                .filter(
+                    IdmIdentityRelationship.tenant_id == tenant_id,
+                    IdmIdentityRelationship.target_group_id.in_(requested),
+                )
+                .order_by(
+                    IdmIdentityRelationship.created_at.asc(),
+                    IdmIdentityRelationship.id.asc(),
+                )
+            )
+            if relationship_kinds:
+                items = items.filter(
+                    IdmIdentityRelationship.relationship_kind.in_(
+                        tuple(dict.fromkeys(relationship_kinds))
+                    )
+                )
+            rows = items.all()
+
+        identities = {
+            identity_id: self._identities.get_identity(identity_id)
+            for identity_id in dict.fromkeys(
+                item.subject_identity_id for item in rows
+            )
+        }
+        decisions: dict[str, list[IdentityRelationshipDecisionRef]] = {
+            group_id: [] for group_id in requested
+        }
+        for item in rows:
+            group = groups[item.target_group_id or ""]
+            identity = identities[item.subject_identity_id]
+            included, code, explanation = _membership_decision(
+                item,
+                group=group,
+                identity_status=identity.status if identity is not None else None,
+                effective_at=moment,
+            )
+            decisions[group.id].append(
+                IdentityRelationshipDecisionRef(
+                    relationship=identity_relationship_ref(item),
+                    included=included,
+                    code=code,
+                    explanation=explanation,
+                    identity_status=(
+                        identity.status if identity is not None else None
+                    ),
+                )
+            )
+        return {
+            group_id: TypedGroupMembershipResolutionRef(
+                group=typed_group_ref(groups[group_id]),
+                effective_at=moment,
+                decisions=tuple(decisions[group_id]),
+            )
+            for group_id in requested
+            if group_id in groups
+        }
+
+    @staticmethod
+    def _validate_group_tenants(session, group_ids, tenant_id):
+        groups: dict[str, IdmTypedGroup] = {}
+        for group_id in group_ids:
+            item = session.get(IdmTypedGroup, group_id)
+            if item is None:
+                continue
+            if item.tenant_id != tenant_id:
+                raise ValueError("Typed group belongs to another tenant.")
+            groups[item.id] = item
+        return groups
+
+    @staticmethod
+    def _effective_relationships(
+        session,
+        *,
+        tenant_id: str,
+        effective_at: datetime,
+        identity_ids: Sequence[str] = (),
+        group_ids: Sequence[str] = (),
+        relationship_kinds: Sequence[str] = (),
+    ) -> tuple[IdmIdentityRelationship, ...]:
+        query = session.query(IdmIdentityRelationship).filter(
+            IdmIdentityRelationship.tenant_id == tenant_id,
+            IdmIdentityRelationship.status == "active",
+            or_(
+                IdmIdentityRelationship.valid_from.is_(None),
+                IdmIdentityRelationship.valid_from <= effective_at,
+            ),
+            or_(
+                IdmIdentityRelationship.valid_until.is_(None),
+                IdmIdentityRelationship.valid_until > effective_at,
+            ),
+        )
+        if identity_ids:
+            query = query.filter(
+                IdmIdentityRelationship.subject_identity_id.in_(identity_ids)
+            )
+        if group_ids:
+            query = query.filter(
+                IdmIdentityRelationship.target_group_id.in_(group_ids)
+            )
+        if relationship_kinds:
+            query = query.filter(
+                IdmIdentityRelationship.relationship_kind.in_(
+                    tuple(dict.fromkeys(relationship_kinds))
+                )
+            )
+        return tuple(
+            query.order_by(
+                IdmIdentityRelationship.created_at.asc(),
+                IdmIdentityRelationship.id.asc(),
+            ).all()
+        )
+
+
+def _membership_decision(
+    item: IdmIdentityRelationship,
+    *,
+    group: IdmTypedGroup,
+    identity_status: str | None,
+    effective_at: datetime,
+) -> tuple[bool, str, str]:
+    if group.status != "active":
+        return False, "group.inactive", "The typed group is inactive."
+    if item.status == "revoked":
+        return False, "relationship.revoked", "The relationship was revoked."
+    if item.status != "active":
+        return False, "relationship.inactive", "The relationship is not active."
+    valid_from = ensure_aware_utc(item.valid_from)
+    if valid_from is not None and valid_from > effective_at:
+        return (
+            False,
+            "relationship.not_yet_effective",
+            "The relationship is not effective yet.",
+        )
+    valid_until = ensure_aware_utc(item.valid_until)
+    if valid_until is not None and valid_until <= effective_at:
+        return False, "relationship.expired", "The relationship has expired."
+    if identity_status is None:
+        return False, "identity.missing", "The related identity no longer exists."
+    if identity_status != "active":
+        return (
+            False,
+            "identity.not_active",
+            f"The related identity lifecycle status is {identity_status}.",
+        )
+    return True, "relationship.effective", "The relationship is effective."
+
+
+__all__ = [
+    "SqlIdmRelationshipDirectory",
+    "identity_relationship_ref",
+    "typed_group_ref",
+]

src/govoplan_idm/backend/search_source.py

@@ -0,0 +1,367 @@
+from __future__ import annotations
+
+from collections.abc import Mapping, Sequence
+from urllib.parse import quote
+
+from sqlalchemy import func, select
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal
+from govoplan_core.core.events import PlatformEvent
+from govoplan_core.core.modules import ModuleContext
+from govoplan_core.core.search import (
+    SearchAuthorizationRequest,
+    SearchBackfillPage,
+    SearchBackfillRequest,
+    SearchDocument,
+    SearchIndexChange,
+    SearchResourceReference,
+    SearchResourceType,
+)
+from govoplan_idm.backend.db.models import (
+    IdmIdentityRelationship,
+    IdmOrganizationFunctionAssignment,
+    IdmTypedGroup,
+)
+
+
+PROVIDER_ID = "idm.directory"
+RESOURCE_MODELS = {
+    "organization_function_assignment": IdmOrganizationFunctionAssignment,
+    "typed_group": IdmTypedGroup,
+    "identity_relationship": IdmIdentityRelationship,
+}
+RESOURCE_SCOPES = {
+    "organization_function_assignment": (
+        "idm:organization_assignment:read",
+        "idm:organization_assignment:write",
+    ),
+    "typed_group": ("idm:relationship:read", "idm:relationship:write"),
+    "identity_relationship": (
+        "idm:relationship:read",
+        "idm:relationship:write",
+    ),
+}
+
+
+class IdmSearchSource:
+    def resource_types(self) -> Sequence[SearchResourceType]:
+        return (
+            SearchResourceType(
+                provider_id=PROVIDER_ID,
+                module_id="idm",
+                resource_type="organization_function_assignment",
+                label="Function assignments",
+                requires_authorization_recheck=True,
+            ),
+            SearchResourceType(
+                provider_id=PROVIDER_ID,
+                module_id="idm",
+                resource_type="typed_group",
+                label="Typed groups",
+                requires_authorization_recheck=True,
+            ),
+            SearchResourceType(
+                provider_id=PROVIDER_ID,
+                module_id="idm",
+                resource_type="identity_relationship",
+                label="Identity relationships",
+                requires_authorization_recheck=True,
+            ),
+        )
+
+    def backfill(
+        self,
+        session: object,
+        *,
+        request: SearchBackfillRequest,
+    ) -> SearchBackfillPage:
+        model = _model(request.provider_id, request.resource_type)
+        db = _session(session)
+        statement = select(model).where(model.tenant_id == request.tenant_id)
+        if request.cursor:
+            statement = statement.where(model.id > request.cursor)
+        rows = list(
+            db.scalars(
+                statement.order_by(model.id).limit(request.limit + 1)
+            )
+        )
+        has_more = len(rows) > request.limit
+        selected = rows[: request.limit]
+        high_watermark = db.scalar(
+            select(func.max(model.updated_at)).where(
+                model.tenant_id == request.tenant_id
+            )
+        )
+        return SearchBackfillPage(
+            documents=tuple(
+                _document(row, resource_type=request.resource_type)
+                for row in selected
+            ),
+            next_cursor=selected[-1].id if has_more and selected else None,
+            complete=not has_more,
+            high_watermark=(
+                high_watermark.isoformat()
+                if high_watermark is not None
+                else None
+            ),
+        )
+
+    def authorize(
+        self,
+        session: object,
+        principal: object,
+        *,
+        requests: Sequence[SearchAuthorizationRequest],
+    ) -> Mapping[str, bool]:
+        decisions = {item.reference.key: False for item in requests}
+        if not isinstance(principal, ApiPrincipal):
+            return decisions
+        db = _session(session)
+        by_type: dict[str, list[SearchAuthorizationRequest]] = {}
+        for item in requests:
+            reference = item.reference
+            if (
+                reference.tenant_id != principal.tenant_id
+                or reference.module_id != "idm"
+                or reference.resource_type not in RESOURCE_MODELS
+                or not any(
+                    principal.has(scope)
+                    for scope in RESOURCE_SCOPES[reference.resource_type]
+                )
+            ):
+                continue
+            by_type.setdefault(reference.resource_type, []).append(item)
+        for resource_type, items in by_type.items():
+            model = RESOURCE_MODELS[resource_type]
+            ids = {item.reference.resource_id for item in items}
+            existing = set(
+                db.scalars(
+                    select(model.id).where(
+                        model.id.in_(ids),
+                        model.tenant_id == principal.tenant_id,
+                    )
+                )
+            )
+            for item in items:
+                decisions[item.reference.key] = (
+                    item.reference.resource_id in existing
+                )
+        return decisions
+
+    def index_changes_for_event(
+        self,
+        session: object,
+        *,
+        event: PlatformEvent,
+        delivery_key: str,
+    ) -> Sequence[SearchIndexChange]:
+        if (
+            event.module_id != "idm"
+            or event.tenant is None
+            or event.resource is None
+            or event.resource.type not in RESOURCE_MODELS
+            or event.resource.id is None
+        ):
+            return ()
+        db = _session(session)
+        resource_type = event.resource.type
+        model = RESOURCE_MODELS[resource_type]
+        row = db.get(model, event.resource.id)
+        deleted = row is None or row.tenant_id != event.tenant.id
+        cursor = event.event_id
+        document = (
+            None
+            if deleted
+            else _document(
+                row,
+                resource_type=resource_type,
+                change_cursor=cursor,
+            )
+        )
+        reference = SearchResourceReference(
+            tenant_id=event.tenant.id,
+            module_id="idm",
+            resource_type=resource_type,
+            resource_id=event.resource.id,
+        )
+        return (
+            SearchIndexChange(
+                change_id=f"{delivery_key}:{PROVIDER_ID}:{resource_type}",
+                provider_id=PROVIDER_ID,
+                kind="delete" if deleted else "upsert",
+                reference=reference,
+                source_revision=(
+                    document.source_revision if document is not None else cursor
+                ),
+                cursor=cursor,
+                document=document,
+                occurred_at=event.occurred_at,
+            ),
+        )
+
+
+def create_idm_search_source(_context: ModuleContext) -> IdmSearchSource:
+    return IdmSearchSource()
+
+
+def _document(
+    row: object,
+    *,
+    resource_type: str,
+    change_cursor: str | None = None,
+) -> SearchDocument:
+    scopes = RESOURCE_SCOPES[resource_type]
+    updated_at = getattr(row, "updated_at") or getattr(row, "created_at")
+    title, summary, body, keywords, metadata, url = _resource_content(
+        row,
+        resource_type=resource_type,
+    )
+    revision = getattr(row, "revision", None)
+    return SearchDocument(
+        tenant_id=str(getattr(row, "tenant_id")),
+        module_id="idm",
+        provider_id=PROVIDER_ID,
+        resource_type=resource_type,
+        resource_id=str(getattr(row, "id")),
+        title=title[:500],
+        url=url,
+        summary=summary[:4000] if summary else None,
+        body=body[:200_000] if body else None,
+        keywords=tuple(item[:200] for item in keywords[:100]),
+        visibility="restricted",
+        acl_tokens=tuple(f"scope:{scope}" for scope in scopes),
+        metadata=metadata,
+        source_revision=f"{revision or 1}:{updated_at.isoformat()}",
+        change_cursor=change_cursor,
+        source_updated_at=updated_at,
+        requires_authorization_recheck=True,
+    )
+
+
+def _resource_content(
+    row: object,
+    *,
+    resource_type: str,
+) -> tuple[str, str, str, tuple[str, ...], dict[str, object], str]:
+    item_id = str(getattr(row, "id"))
+    if resource_type == "typed_group":
+        group = row
+        return (
+            str(getattr(group, "name")),
+            str(getattr(group, "description") or ""),
+            " ".join(
+                str(value)
+                for value in (
+                    getattr(group, "key"),
+                    getattr(group, "description"),
+                    getattr(group, "source_resource_id"),
+                )
+                if value
+            ),
+            (
+                str(getattr(group, "group_type")),
+                str(getattr(group, "status")),
+                str(getattr(group, "source_provider")),
+            ),
+            {
+                "key": getattr(group, "key"),
+                "group_type": getattr(group, "group_type"),
+                "status": getattr(group, "status"),
+                "source_provider": getattr(group, "source_provider"),
+            },
+            f"/idm?groupId={quote(item_id, safe='')}",
+        )
+    if resource_type == "identity_relationship":
+        relationship = row
+        kind = str(getattr(relationship, "relationship_kind"))
+        return (
+            f"Relationship: {kind}",
+            str(getattr(relationship, "role") or ""),
+            " ".join(
+                str(value)
+                for value in (
+                    getattr(relationship, "subject_identity_id"),
+                    getattr(relationship, "target_group_id"),
+                    getattr(relationship, "related_identity_id"),
+                    getattr(relationship, "role"),
+                )
+                if value
+            ),
+            (kind, str(getattr(relationship, "status"))),
+            {
+                "relationship_kind": kind,
+                "status": getattr(relationship, "status"),
+                "subject_identity_id": getattr(
+                    relationship, "subject_identity_id"
+                ),
+                "target_group_id": getattr(relationship, "target_group_id"),
+                "related_identity_id": getattr(
+                    relationship, "related_identity_id"
+                ),
+            },
+            f"/idm?relationshipId={quote(item_id, safe='')}",
+        )
+    assignment = row
+    return (
+        "Organization function assignment",
+        " ".join(
+            (
+                str(getattr(assignment, "function_id")),
+                str(getattr(assignment, "organization_unit_id")),
+            )
+        ),
+        " ".join(
+            str(value)
+            for value in (
+                getattr(assignment, "identity_id"),
+                getattr(assignment, "account_id"),
+                getattr(assignment, "function_id"),
+                getattr(assignment, "organization_unit_id"),
+            )
+            if value
+        ),
+        (
+            str(getattr(assignment, "source")),
+            "active" if getattr(assignment, "is_active") else "inactive",
+        ),
+        {
+            "identity_id": getattr(assignment, "identity_id"),
+            "function_id": getattr(assignment, "function_id"),
+            "organization_unit_id": getattr(
+                assignment, "organization_unit_id"
+            ),
+            "is_active": getattr(assignment, "is_active"),
+            "valid_from": (
+                getattr(assignment, "valid_from").isoformat()
+                if getattr(assignment, "valid_from")
+                else None
+            ),
+            "valid_until": (
+                getattr(assignment, "valid_until").isoformat()
+                if getattr(assignment, "valid_until")
+                else None
+            ),
+        },
+        f"/idm?assignmentId={quote(item_id, safe='')}",
+    )
+
+
+def _model(provider_id: str, resource_type: str):
+    if provider_id != PROVIDER_ID or resource_type not in RESOURCE_MODELS:
+        raise ValueError("Unsupported IDM search source.")
+    return RESOURCE_MODELS[resource_type]
+
+
+def _session(value: object) -> Session:
+    if not isinstance(value, Session):
+        raise TypeError("IDM search requires a SQLAlchemy session.")
+    return value
+
+
+__all__ = [
+    "IdmSearchSource",
+    "PROVIDER_ID",
+    "RESOURCE_MODELS",
+    "create_idm_search_source",
+]

src/govoplan_idm/backend/workflow_definitions.py

@@ -0,0 +1,193 @@
+from __future__ import annotations
+
+from govoplan_core.core.workflows import WorkflowDefinitionContribution
+
+
+def function_assignment_workflow_definitions(
+    *,
+    module_version: str,
+) -> tuple[WorkflowDefinitionContribution, ...]:
+    return (
+        _contribution(
+            module_version=module_version,
+            definition_key="function-assignment-request",
+            name="Request an organization function",
+            description=(
+                "Governed holder, authority, and optional recipient decisions "
+                "for a self-requested organization function assignment."
+            ),
+            kind="request",
+        ),
+        _contribution(
+            module_version=module_version,
+            definition_key="function-assignment-grant",
+            name="Bestow an organization function",
+            description=(
+                "Governed holder, authority, and recipient decisions for an "
+                "organization function grant."
+            ),
+            kind="grant",
+        ),
+    )
+
+
+def _contribution(
+    *,
+    module_version: str,
+    definition_key: str,
+    name: str,
+    description: str,
+    kind: str,
+) -> WorkflowDefinitionContribution:
+    return WorkflowDefinitionContribution(
+        origin_module_id="idm",
+        origin_module_version=module_version,
+        definition_key=definition_key,
+        name=name,
+        description=description,
+        graph=_graph(kind=kind),
+        scope_type="system",
+        inherit_to_lower_scopes=True,
+        allow_start=True,
+        allow_reuse=False,
+        allow_automation=False,
+        execution_mode="guided",
+        activate_on_install=True,
+        metadata={
+            "domain": "idm.function_assignment_change",
+            "change_kind": kind,
+            "state_owner": "idm",
+        },
+        policy_metadata={
+            "governance_capability": ("policy.functionAssignmentGovernance"),
+        },
+    )
+
+
+def _graph(*, kind: str) -> dict[str, object]:
+    return {
+        "schema_version": 1,
+        "nodes": [
+            {
+                "id": "start",
+                "type": "workflow.start.manual",
+                "label": "Submitted",
+                "position": {"x": 20, "y": 120},
+                "config": {
+                    "input_schema_ref": (f"govoplan/idm/function-assignment-{kind}.v1"),
+                },
+            },
+            {
+                "id": "holder_review",
+                "type": "workflow.review",
+                "label": "Holder review",
+                "position": {"x": 230, "y": 120},
+                "config": {
+                    "title": "Holder review",
+                    "reviewer": "effective-holder",
+                    "required_evidence": [],
+                    "view_surface_ids": [
+                        "idm.action.view-function-assignments",
+                    ],
+                },
+            },
+            {
+                "id": "authority_review",
+                "type": "workflow.review",
+                "label": "Authority clearance",
+                "position": {"x": 470, "y": 120},
+                "config": {
+                    "title": "Authority clearance",
+                    "reviewer": "designated-authority",
+                    "required_evidence": [],
+                    "view_surface_ids": [
+                        "idm.action.view-function-assignments",
+                    ],
+                },
+            },
+            {
+                "id": "recipient_review",
+                "type": "workflow.review",
+                "label": "Recipient acceptance",
+                "position": {"x": 730, "y": 120},
+                "config": {
+                    "title": "Recipient acceptance",
+                    "reviewer": "candidate",
+                    "required_evidence": [],
+                    "view_surface_ids": [
+                        "idm.action.view-function-assignments",
+                    ],
+                },
+            },
+            {
+                "id": "completed",
+                "type": "workflow.end.completed",
+                "label": "Approved",
+                "position": {"x": 990, "y": 70},
+                "config": {"output_mapping": {}},
+            },
+            {
+                "id": "rejected",
+                "type": "workflow.end.cancelled",
+                "label": "Rejected",
+                "position": {"x": 990, "y": 230},
+                "config": {"reason": "Function assignment change rejected"},
+            },
+        ],
+        "edges": [
+            {
+                "id": "start-holder",
+                "source": "start",
+                "target": "holder_review",
+            },
+            {
+                "id": "holder-authority",
+                "source": "holder_review",
+                "source_port": "approved",
+                "target": "authority_review",
+            },
+            {
+                "id": "holder-rejected",
+                "source": "holder_review",
+                "source_port": "rejected",
+                "target": "rejected",
+            },
+            {
+                "id": "authority-recipient",
+                "source": "authority_review",
+                "source_port": "approved",
+                "target": "recipient_review",
+            },
+            {
+                "id": "authority-rejected",
+                "source": "authority_review",
+                "source_port": "rejected",
+                "target": "rejected",
+            },
+            {
+                "id": "recipient-completed",
+                "source": "recipient_review",
+                "source_port": "approved",
+                "target": "completed",
+            },
+            {
+                "id": "recipient-rejected",
+                "source": "recipient_review",
+                "source_port": "rejected",
+                "target": "rejected",
+            },
+        ],
+        "metadata": {
+            "notation": "govoplan.workflow.native",
+            "domain": "idm.function_assignment_change",
+            "change_kind": kind,
+            "optional_steps": [
+                "holder_review",
+                "authority_review",
+                "recipient_review",
+            ],
+        },
+    }
+
+
+__all__ = ["function_assignment_workflow_definitions"]

tests/test_assignment_expiry.py

@@ -0,0 +1,267 @@
+from __future__ import annotations
+
+import unittest
+from datetime import datetime, timedelta, timezone
+
+from govoplan_core.core.change_sequence import ChangeSequenceEntry
+from govoplan_core.core.events import EventBus, PlatformEvent, event_bus_context
+from govoplan_core.db.base import Base
+from govoplan_core.db.session import configure_database, reset_database
+from govoplan_identity.backend.db import models as identity_models  # noqa: F401
+from govoplan_idm.backend.assignment_lifecycle import SqlIdmAssignmentLifecycle
+from govoplan_idm.backend.db.models import (
+    IdmFunctionAssignmentChange,
+    IdmFunctionAssignmentChangeEvent,
+    IdmIdentityRelationship,
+    IdmOrganizationFunctionAssignment,
+    IdmTypedGroup,
+)
+from govoplan_organizations.backend.db import models as organization_models  # noqa: F401
+
+
+class AssignmentExpiryTests(unittest.TestCase):
+    def setUp(self) -> None:
+        self.database = configure_database("sqlite:///:memory:")
+        Base.metadata.create_all(
+            self.database.engine,
+            tables=[
+                IdmOrganizationFunctionAssignment.__table__,
+                IdmFunctionAssignmentChange.__table__,
+                IdmFunctionAssignmentChangeEvent.__table__,
+                IdmTypedGroup.__table__,
+                IdmIdentityRelationship.__table__,
+                ChangeSequenceEntry.__table__,
+            ],
+        )
+        self.lifecycle = SqlIdmAssignmentLifecycle()
+
+    def tearDown(self) -> None:
+        reset_database(dispose=True)
+
+    @staticmethod
+    def _assignment(
+        assignment_id: str,
+        *,
+        tenant_id: str = "tenant-1",
+        valid_until: datetime,
+        active: bool = True,
+        expired_event_at: datetime | None = None,
+    ) -> IdmOrganizationFunctionAssignment:
+        return IdmOrganizationFunctionAssignment(
+            id=assignment_id,
+            tenant_id=tenant_id,
+            identity_id=f"identity-{assignment_id}",
+            function_id="function-1",
+            organization_unit_id="unit-1",
+            source="direct",
+            valid_until=valid_until,
+            expired_event_at=expired_event_at,
+            is_active=active,
+            settings={},
+        )
+
+    def test_sweep_claims_due_assignments_once_and_preserves_provenance(self) -> None:
+        boundary = datetime(2026, 7, 31, 12, tzinfo=timezone.utc)
+        with self.database.session() as session:
+            session.add_all(
+                (
+                    self._assignment(
+                        "due",
+                        valid_until=boundary - timedelta(seconds=1),
+                    ),
+                    self._assignment(
+                        "future",
+                        valid_until=boundary + timedelta(seconds=1),
+                    ),
+                    self._assignment(
+                        "revoked",
+                        valid_until=boundary - timedelta(seconds=1),
+                        active=False,
+                    ),
+                    self._assignment(
+                        "already-emitted",
+                        valid_until=boundary - timedelta(seconds=1),
+                        expired_event_at=boundary - timedelta(minutes=1),
+                    ),
+                    self._assignment(
+                        "other-tenant",
+                        tenant_id="tenant-2",
+                        valid_until=boundary - timedelta(seconds=1),
+                    ),
+                )
+            )
+            session.commit()
+
+        events: list[PlatformEvent] = []
+        bus = EventBus()
+        bus.subscribe("idm.function_assignment.expired.v1", events.append)
+        with self.database.SessionLocal() as session, event_bus_context(bus):
+            result = self.lifecycle.process_expired(
+                session,
+                tenant_id="tenant-1",
+                effective_at=boundary,
+            )
+            session.commit()
+
+        self.assertEqual(1, result["selected"])
+        self.assertEqual(1, result["expired"])
+        self.assertEqual(["due"], result["assignment_ids"])
+        self.assertEqual(1, len(events))
+        self.assertEqual("system", events[0].actor.type)
+        self.assertEqual("tenant-1", events[0].tenant.id)
+        self.assertEqual("identity-due", events[0].payload["identity_id"])
+        self.assertEqual("function-1", events[0].payload["function_id"])
+
+        with self.database.session() as session:
+            due = session.get(IdmOrganizationFunctionAssignment, "due")
+            self.assertEqual(boundary, due.expired_event_at.replace(tzinfo=timezone.utc))
+            repeated = self.lifecycle.process_expired(
+                session,
+                tenant_id="tenant-1",
+                effective_at=boundary,
+            )
+            session.commit()
+        self.assertEqual(0, repeated["expired"])
+        self.assertEqual(1, len(events))
+
+    def test_sweep_rollback_releases_marker_and_event(self) -> None:
+        boundary = datetime(2026, 7, 31, 12, tzinfo=timezone.utc)
+        with self.database.session() as session:
+            session.add(
+                self._assignment(
+                    "rolled-back",
+                    valid_until=boundary - timedelta(seconds=1),
+                )
+            )
+            session.commit()
+
+        events: list[PlatformEvent] = []
+        bus = EventBus()
+        bus.subscribe("idm.function_assignment.expired.v1", events.append)
+        with self.database.SessionLocal() as session, event_bus_context(bus):
+            self.lifecycle.process_expired(session, effective_at=boundary)
+            session.rollback()
+        self.assertEqual([], events)
+
+        with self.database.session() as session:
+            item = session.get(IdmOrganizationFunctionAssignment, "rolled-back")
+            self.assertIsNone(item.expired_event_at)
+
+    def test_limit_validation_is_bounded(self) -> None:
+        with self.database.session() as session:
+            for value in (0, 1001):
+                with self.subTest(limit=value), self.assertRaises(ValueError):
+                    self.lifecycle.process_expired(session, limit=value)
+
+    def test_sweep_expires_open_governed_changes_once(self) -> None:
+        boundary = datetime(2026, 7, 31, 12, tzinfo=timezone.utc)
+        with self.database.session() as session:
+            session.add(
+                IdmFunctionAssignmentChange(
+                    id="change-due",
+                    tenant_id="tenant-1",
+                    kind="request",
+                    state="awaiting_holder",
+                    profile="holder_grant",
+                    function_id="function-1",
+                    organization_unit_id="unit-1",
+                    candidate_identity_id="identity-1",
+                    initiator_account_id="account-1",
+                    justification="Need the function",
+                    evidence=[],
+                    assignment_source="governance",
+                    required_steps=["holder"],
+                    completed_steps=[],
+                    policy_decision={},
+                    idempotency_key="request-1",
+                    expires_at=boundary - timedelta(seconds=1),
+                    metadata_={},
+                )
+            )
+            session.commit()
+
+        events: list[PlatformEvent] = []
+        bus = EventBus()
+        bus.subscribe("idm.function_change.expired.v1", events.append)
+        with self.database.SessionLocal() as session, event_bus_context(bus):
+            result = self.lifecycle.process_expired(
+                session,
+                tenant_id="tenant-1",
+                effective_at=boundary,
+            )
+            session.commit()
+            repeated = self.lifecycle.process_expired(
+                session,
+                tenant_id="tenant-1",
+                effective_at=boundary,
+            )
+            session.commit()
+
+        self.assertEqual(1, result["expired_changes"])
+        self.assertEqual(["change-due"], result["change_ids"])
+        self.assertEqual(0, repeated["expired_changes"])
+        self.assertEqual(1, len(events))
+        with self.database.session() as session:
+            change = session.get(IdmFunctionAssignmentChange, "change-due")
+            self.assertEqual("expired", change.state)
+            self.assertEqual(2, change.resource_revision)
+            history = session.query(IdmFunctionAssignmentChangeEvent).all()
+            self.assertEqual(["expired"], [item.action for item in history])
+
+    def test_sweep_emits_relationship_expiry_once(self) -> None:
+        boundary = datetime(2026, 8, 2, 12, tzinfo=timezone.utc)
+        with self.database.session() as session:
+            session.add(
+                IdmTypedGroup(
+                    id="group-1",
+                    tenant_id="tenant-1",
+                    key="eligible",
+                    name="Eligible",
+                    group_type="business_status",
+                )
+            )
+            session.add(
+                IdmIdentityRelationship(
+                    id="relationship-due",
+                    tenant_id="tenant-1",
+                    relationship_kind="member",
+                    subject_identity_id="identity-1",
+                    target_group_id="group-1",
+                    valid_until=boundary - timedelta(seconds=1),
+                    status="active",
+                    properties={},
+                    provenance={},
+                )
+            )
+            session.commit()
+
+        events: list[PlatformEvent] = []
+        bus = EventBus()
+        bus.subscribe("idm.relationship.expired.v1", events.append)
+        with self.database.SessionLocal() as session, event_bus_context(bus):
+            result = self.lifecycle.process_expired(
+                session,
+                tenant_id="tenant-1",
+                effective_at=boundary,
+            )
+            session.commit()
+            repeated = self.lifecycle.process_expired(
+                session,
+                tenant_id="tenant-1",
+                effective_at=boundary,
+            )
+            session.commit()
+
+        self.assertEqual(["relationship-due"], result["relationship_ids"])
+        self.assertEqual(1, result["expired_relationships"])
+        self.assertEqual(0, repeated["expired_relationships"])
+        self.assertEqual(1, len(events))
+        self.assertEqual("identity-1", events[0].subject.id)
+        with self.database.session() as session:
+            item = session.get(IdmIdentityRelationship, "relationship-due")
+            self.assertEqual(2, item.revision)
+            self.assertIsNotNone(item.expired_event_at)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_assignment_workflow.py

@@ -0,0 +1,258 @@
+from __future__ import annotations
+
+import unittest
+from datetime import datetime, timedelta, timezone
+from types import SimpleNamespace
+
+from govoplan_idm.backend.assignment_transitions import (
+    AssignmentSnapshot,
+    AssignmentTransitionError,
+    lifecycle_event_types,
+    plan_assignment_update,
+    validate_assignment_shape,
+    validate_assignment_source_rules,
+)
+
+
+def assignment(**overrides: object) -> SimpleNamespace:
+    values = {
+        "id": "assignment-1",
+        "identity_id": "identity-1",
+        "account_id": "account-1",
+        "function_id": "function-1",
+        "organization_unit_id": "unit-1",
+        "applies_to_subunits": False,
+        "source": "direct",
+        "delegated_from_assignment_id": None,
+        "acting_for_account_id": None,
+        "valid_from": None,
+        "valid_until": None,
+        "is_active": True,
+        "settings": {},
+    }
+    values.update(overrides)
+    return SimpleNamespace(**values)
+
+
+def function(**overrides: object) -> SimpleNamespace:
+    values = {"delegable": True, "act_in_place_allowed": True}
+    values.update(overrides)
+    return SimpleNamespace(**values)
+
+
+class AssignmentWorkflowTests(unittest.TestCase):
+    def assert_invalid(self, expected_detail: str, callback: object) -> None:
+        with self.assertRaises(AssignmentTransitionError) as captured:
+            callback()
+        self.assertEqual(str(captured.exception), expected_detail)
+
+    def test_direct_assignment_accepts_plain_shape(self) -> None:
+        item = assignment()
+
+        validate_assignment_shape(item)  # type: ignore[arg-type]
+        validate_assignment_source_rules(  # type: ignore[arg-type]
+            item,
+            function=function(),
+            base=None,
+            account_linked_to_identity=lambda _identity_id, _account_id: False,
+        )
+
+    def test_shape_rejects_backwards_validity_window(self) -> None:
+        now = datetime.now(timezone.utc)
+        item = assignment(valid_from=now, valid_until=now - timedelta(days=1))
+
+        self.assert_invalid("Valid until must be after valid from.", lambda: validate_assignment_shape(item))  # type: ignore[arg-type]
+
+    def test_shape_rejects_self_delegation(self) -> None:
+        item = assignment(id="assignment-1", delegated_from_assignment_id="assignment-1")
+
+        self.assert_invalid("A function assignment cannot delegate from itself.", lambda: validate_assignment_shape(item))  # type: ignore[arg-type]
+
+    def test_delegated_assignment_accepts_different_target(self) -> None:
+        base = assignment(id="source-1", identity_id="identity-1", account_id="account-1")
+        item = assignment(
+            id="assignment-2",
+            identity_id="identity-2",
+            account_id="account-2",
+            source="delegated",
+            delegated_from_assignment_id="source-1",
+        )
+
+        validate_assignment_source_rules(  # type: ignore[arg-type]
+            item,
+            function=function(delegable=True),
+            base=base,
+            account_linked_to_identity=lambda _identity_id, _account_id: False,
+        )
+
+    def test_delegated_assignment_rejects_same_target(self) -> None:
+        base = assignment(id="source-1", identity_id="identity-1", account_id="account-1")
+        item = assignment(source="delegated", delegated_from_assignment_id="source-1")
+
+        self.assert_invalid(
+            "A delegated assignment must target another identity or account.",
+            lambda: validate_assignment_source_rules(  # type: ignore[arg-type]
+                item,
+                function=function(delegable=True),
+                base=base,
+                account_linked_to_identity=lambda _identity_id, _account_id: False,
+            ),
+        )
+
+    def test_acting_for_assignment_accepts_identity_linked_account(self) -> None:
+        base = assignment(id="source-1", identity_id="identity-1", account_id=None)
+        item = assignment(
+            id="assignment-2",
+            source="acting_for",
+            delegated_from_assignment_id="source-1",
+            account_id="acting-account",
+            acting_for_account_id="represented-account",
+        )
+
+        validate_assignment_source_rules(  # type: ignore[arg-type]
+            item,
+            function=function(act_in_place_allowed=True),
+            base=base,
+            account_linked_to_identity=lambda identity_id, account_id: identity_id == "identity-1" and account_id == "represented-account",
+        )
+
+    def test_acting_for_assignment_rejects_unlinked_represented_account(self) -> None:
+        base = assignment(id="source-1", identity_id="identity-1", account_id=None)
+        item = assignment(
+            id="assignment-2",
+            source="acting_for",
+            delegated_from_assignment_id="source-1",
+            account_id="acting-account",
+            acting_for_account_id="represented-account",
+        )
+
+        self.assert_invalid(
+            "Acting-for account must belong to the source assignment identity.",
+            lambda: validate_assignment_source_rules(  # type: ignore[arg-type]
+                item,
+                function=function(act_in_place_allowed=True),
+                base=base,
+                account_linked_to_identity=lambda _identity_id, _account_id: False,
+            ),
+        )
+
+    def test_update_plan_does_not_mutate_until_applied(self) -> None:
+        item = assignment()
+
+        plan = plan_assignment_update(
+            item,  # type: ignore[arg-type]
+            {
+                "function_id": "function-2",
+                "account_id": "account-2",
+                "settings": {"source": "test"},
+            },
+            organization_unit_id="unit-2",
+        )
+
+        self.assertEqual("function-1", item.function_id)
+        self.assertEqual("function-2", plan.after.function_id)
+        self.assertEqual("unit-2", plan.after.organization_unit_id)
+        self.assertEqual(
+            ("account_id", "function_id", "settings", "organization_unit_id"),
+            plan.changed_fields,
+        )
+        plan.apply(item)  # type: ignore[arg-type]
+        self.assertEqual("function-2", item.function_id)
+        self.assertEqual("unit-2", item.organization_unit_id)
+
+    def test_update_decision_table_rejects_required_nulls(self) -> None:
+        item = assignment()
+        cases = {
+            "identity_id": "Identity is required.",
+            "function_id": "Function is required.",
+            "applies_to_subunits": "Subunit applicability cannot be empty.",
+            "source": "Assignment source is required.",
+            "is_active": "Active state cannot be empty.",
+            "settings": "Settings cannot be empty.",
+        }
+        for field, message in cases.items():
+            with self.subTest(field=field):
+                self.assert_invalid(
+                    message,
+                    lambda field=field: plan_assignment_update(  # type: ignore[misc]
+                        item,  # type: ignore[arg-type]
+                        {field: None},
+                        organization_unit_id=(
+                            "unit-2" if field == "function_id" else None
+                        ),
+                    ),
+                )
+
+    def test_lifecycle_event_decision_table(self) -> None:
+        now = datetime.now(timezone.utc)
+        before = AssignmentSnapshot.from_assignment(assignment())  # type: ignore[arg-type]
+        cases = (
+            (
+                "ordinary update",
+                plan_assignment_update(
+                    assignment(),  # type: ignore[arg-type]
+                    {"settings": {"changed": True}},
+                ).after,
+                ("idm.function_assignment.changed.v1",),
+            ),
+            (
+                "revocation",
+                plan_assignment_update(
+                    assignment(),  # type: ignore[arg-type]
+                    {"is_active": False},
+                ).after,
+                (
+                    "idm.function_assignment.changed.v1",
+                    "idm.function_assignment.revoked.v1",
+                ),
+            ),
+            (
+                "new expiration",
+                plan_assignment_update(
+                    assignment(),  # type: ignore[arg-type]
+                    {"valid_until": now - timedelta(minutes=1)},
+                ).after,
+                (
+                    "idm.function_assignment.changed.v1",
+                    "idm.function_assignment.expired.v1",
+                ),
+            ),
+            (
+                "future validity",
+                plan_assignment_update(
+                    assignment(),  # type: ignore[arg-type]
+                    {"valid_until": now + timedelta(minutes=1)},
+                ).after,
+                ("idm.function_assignment.changed.v1",),
+            ),
+        )
+        for label, after, expected in cases:
+            with self.subTest(label=label):
+                self.assertEqual(
+                    expected,
+                    lifecycle_event_types(before, after, now=now),
+                )
+
+    def test_reactivation_of_elapsed_assignment_emits_expiry(self) -> None:
+        now = datetime.now(timezone.utc)
+        item = assignment(
+            is_active=False,
+            valid_until=now - timedelta(minutes=1),
+        )
+        before = AssignmentSnapshot.from_assignment(item)  # type: ignore[arg-type]
+        after = plan_assignment_update(  # type: ignore[arg-type]
+            item,
+            {"is_active": True},
+        ).after
+
+        self.assertEqual(
+            (
+                "idm.function_assignment.changed.v1",
+                "idm.function_assignment.expired.v1",
+            ),
+            lifecycle_event_types(before, after, now=now),
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_directory.py

@@ -0,0 +1,336 @@
+from __future__ import annotations
+
+import unittest
+from datetime import datetime, timedelta, timezone
+
+from govoplan_core.core.identity import IdentityAccountLinkRef, IdentityRef
+from govoplan_core.core.organizations import OrganizationFunctionRef
+from govoplan_core.db.base import Base
+from govoplan_core.db.session import configure_database, reset_database
+from govoplan_identity.backend.db import models as identity_models  # noqa: F401 - resolve assignment foreign keys
+from govoplan_idm.backend.db.models import IdmOrganizationFunctionAssignment
+from govoplan_idm.backend.directory import SqlIdmDirectory
+from govoplan_organizations.backend.db import models as organization_models  # noqa: F401 - resolve assignment foreign keys
+
+
+class StubIdentityDirectory:
+    def __init__(self, identities: tuple[IdentityRef, ...] = ()) -> None:
+        self.identities = identities
+
+    def get_identity(self, identity_id: str) -> IdentityRef | None:
+        return next(
+            (item for item in self.identities if item.id == identity_id),
+            None,
+        )
+
+    def identity_for_account(self, account_id: str) -> IdentityRef | None:
+        return next(
+            (
+                item
+                for item in self.identities
+                if account_id in item.account_ids
+                or item.primary_account_id == account_id
+            ),
+            None,
+        )
+
+    def identities_for_accounts(self, account_ids: tuple[str, ...]) -> tuple[IdentityRef, ...]:
+        requested = set(account_ids)
+        return tuple(
+            item
+            for item in self.identities
+            if requested.intersection(item.account_ids)
+            or item.primary_account_id in requested
+        )
+
+    def accounts_for_identity(self, identity_id: str) -> tuple[IdentityAccountLinkRef, ...]:
+        identity = self.get_identity(identity_id)
+        if identity is None:
+            return ()
+        return tuple(
+            IdentityAccountLinkRef(
+                id=f"{identity_id}:{account_id}",
+                identity_id=identity_id,
+                account_id=account_id,
+                is_primary=account_id == identity.primary_account_id,
+            )
+            for account_id in identity.account_ids
+        )
+
+
+class StubOrganizationDirectory:
+    def get_function(self, function_id: str) -> OrganizationFunctionRef | None:
+        return OrganizationFunctionRef(
+            id=function_id,
+            tenant_id="tenant-1",
+            organization_unit_id="unit-1",
+            slug=function_id,
+            name=function_id,
+            status="active",
+        )
+
+    def get_organization_unit(self, organization_unit_id: str):
+        return None
+
+    def organization_units_for_tenant(self, tenant_id: str):
+        return ()
+
+    def functions_for_organization_unit(self, organization_unit_id: str, *, include_subunits: bool = False):
+        return ()
+
+
+class IdmDirectoryDelegationTests(unittest.TestCase):
+    def setUp(self) -> None:
+        self.database = configure_database("sqlite:///:memory:")
+        Base.metadata.create_all(
+            self.database.engine,
+            tables=[IdmOrganizationFunctionAssignment.__table__],
+        )
+        self.directory = SqlIdmDirectory(
+            identities=StubIdentityDirectory(),  # type: ignore[arg-type]
+            organizations=StubOrganizationDirectory(),  # type: ignore[arg-type]
+        )
+
+    def tearDown(self) -> None:
+        reset_database(dispose=True)
+
+    def _source_and_child(
+        self,
+        *,
+        case: str,
+        child_source: str = "delegated",
+        source_tenant_id: str = "tenant-1",
+        source_function_id: str = "function-1",
+        source_is_active: bool = True,
+        source_valid_from: datetime | None = None,
+        source_valid_until: datetime | None = None,
+    ) -> tuple[IdmOrganizationFunctionAssignment, IdmOrganizationFunctionAssignment]:
+        source = IdmOrganizationFunctionAssignment(
+            id=f"source-{case}",
+            tenant_id=source_tenant_id,
+            identity_id=f"source-identity-{case}",
+            function_id=source_function_id,
+            organization_unit_id="unit-1",
+            source="direct",
+            is_active=source_is_active,
+            valid_from=source_valid_from,
+            valid_until=source_valid_until,
+            settings={},
+        )
+        child = IdmOrganizationFunctionAssignment(
+            id=f"child-{case}",
+            tenant_id="tenant-1",
+            identity_id=f"target-identity-{case}",
+            function_id="function-1",
+            organization_unit_id="unit-1",
+            source=child_source,
+            delegated_from_assignment_id=source.id,
+            acting_for_account_id="represented-account" if child_source == "acting_for" else None,
+            is_active=True,
+            settings={},
+        )
+        return source, child
+
+    def test_effective_delegations_require_a_current_matching_source(self) -> None:
+        now = datetime.now(timezone.utc)
+        cases = (
+            self._source_and_child(case="valid"),
+            self._source_and_child(case="acting", child_source="acting_for"),
+            self._source_and_child(case="revoked", source_is_active=False),
+            self._source_and_child(case="expired", source_valid_until=now - timedelta(days=1)),
+            self._source_and_child(case="future", source_valid_from=now + timedelta(days=1)),
+            self._source_and_child(case="wrong-tenant", source_tenant_id="tenant-2"),
+            self._source_and_child(case="wrong-function", source_function_id="function-2"),
+        )
+        with self.database.session() as session:
+            for source, child in cases:
+                session.add_all((source, child))
+            session.commit()
+
+        expected = {
+            "valid": ("child-valid",),
+            "acting": ("child-acting",),
+            "revoked": (),
+            "expired": (),
+            "future": (),
+            "wrong-tenant": (),
+            "wrong-function": (),
+        }
+        for case, expected_ids in expected.items():
+            with self.subTest(case=case):
+                assignments = self.directory.organization_function_assignments_for_identity(
+                    f"target-identity-{case}",
+                    tenant_id="tenant-1",
+                )
+                self.assertEqual(expected_ids, tuple(item.id for item in assignments))
+
+    def test_reverse_lookup_returns_only_effective_function_assignments(self) -> None:
+        now = datetime.now(timezone.utc)
+        active = IdmOrganizationFunctionAssignment(
+            id="active-function-holder",
+            tenant_id="tenant-1",
+            identity_id="identity-active",
+            account_id="account-active",
+            function_id="function-1",
+            organization_unit_id="unit-1",
+            source="direct",
+            is_active=True,
+            settings={},
+        )
+        expired = IdmOrganizationFunctionAssignment(
+            id="expired-function-holder",
+            tenant_id="tenant-1",
+            identity_id="identity-expired",
+            function_id="function-1",
+            organization_unit_id="unit-1",
+            source="direct",
+            is_active=True,
+            valid_until=now - timedelta(minutes=1),
+            settings={},
+        )
+        other_tenant = IdmOrganizationFunctionAssignment(
+            id="other-tenant-holder",
+            tenant_id="tenant-2",
+            identity_id="identity-other",
+            function_id="function-1",
+            organization_unit_id="unit-1",
+            source="direct",
+            is_active=True,
+            settings={},
+        )
+        with self.database.session() as session:
+            session.add_all((active, expired, other_tenant))
+            session.commit()
+
+        assignments = self.directory.organization_function_assignments_for_function(
+            "function-1",
+            tenant_id="tenant-1",
+        )
+
+        self.assertEqual(
+            ("active-function-holder",),
+            tuple(item.id for item in assignments),
+        )
+
+    def test_batch_incumbency_reports_vacancy_and_honors_effective_time(
+        self,
+    ) -> None:
+        boundary = datetime.now(timezone.utc)
+        assignment = IdmOrganizationFunctionAssignment(
+            id="bounded-holder",
+            tenant_id="tenant-1",
+            identity_id="identity-bounded",
+            account_id="account-bounded",
+            function_id="function-1",
+            organization_unit_id="unit-1",
+            source="direct",
+            is_active=True,
+            valid_from=boundary - timedelta(hours=1),
+            valid_until=boundary + timedelta(hours=1),
+            settings={},
+        )
+        with self.database.session() as session:
+            session.add(assignment)
+            session.commit()
+
+        current = self.directory.organization_function_incumbencies(
+            ("function-1", "function-2"),
+            tenant_id="tenant-1",
+            effective_at=boundary,
+        )
+        later = self.directory.organization_function_incumbencies(
+            ("function-1",),
+            tenant_id="tenant-1",
+            effective_at=boundary + timedelta(hours=2),
+        )
+
+        self.assertEqual(
+            ("bounded-holder",),
+            tuple(item.id for item in current["function-1"].assignments),
+        )
+        self.assertFalse(current["function-1"].vacant)
+        self.assertTrue(current["function-2"].vacant)
+        self.assertTrue(later["function-1"].vacant)
+
+        with self.assertRaisesRegex(ValueError, "another tenant"):
+            self.directory.organization_function_incumbencies(
+                ("function-1",),
+                tenant_id="tenant-2",
+            )
+
+    def test_batch_accounts_preserve_account_and_subunit_provenance(self) -> None:
+        self.directory = SqlIdmDirectory(
+            identities=StubIdentityDirectory(
+                (
+                    IdentityRef(
+                        id="identity-shared",
+                        primary_account_id="account-1",
+                        account_ids=("account-1", "account-2"),
+                    ),
+                )
+            ),  # type: ignore[arg-type]
+            organizations=StubOrganizationDirectory(),  # type: ignore[arg-type]
+        )
+        broad = IdmOrganizationFunctionAssignment(
+            id="broad",
+            tenant_id="tenant-1",
+            identity_id="identity-shared",
+            account_id=None,
+            function_id="function-1",
+            organization_unit_id="unit-1",
+            applies_to_subunits=True,
+            source="direct",
+            is_active=True,
+            settings={},
+        )
+        account_specific = IdmOrganizationFunctionAssignment(
+            id="account-specific",
+            tenant_id="tenant-1",
+            identity_id="identity-shared",
+            account_id="account-2",
+            function_id="function-2",
+            organization_unit_id="unit-1",
+            source="governance",
+            is_active=True,
+            settings={},
+        )
+        simultaneous = IdmOrganizationFunctionAssignment(
+            id="second-incumbent",
+            tenant_id="tenant-1",
+            identity_id="identity-second",
+            function_id="function-1",
+            organization_unit_id="unit-1",
+            source="direct",
+            is_active=True,
+            settings={},
+        )
+        with self.database.session() as session:
+            session.add_all((broad, account_specific, simultaneous))
+            session.commit()
+
+        resolved = self.directory.organization_function_assignments_for_accounts(
+            ("account-1", "account-2", "missing"),
+            tenant_id="tenant-1",
+        )
+        self.assertEqual(("broad",), tuple(item.id for item in resolved["account-1"]))
+        self.assertEqual(
+            ("broad", "account-specific"),
+            tuple(item.id for item in resolved["account-2"]),
+        )
+        self.assertEqual((), resolved["missing"])
+        self.assertTrue(resolved["account-1"][0].applies_to_subunits)
+        self.assertEqual("governance", resolved["account-2"][1].source)
+
+        incumbency = self.directory.organization_function_incumbencies(
+            ("function-1",),
+            tenant_id="tenant-1",
+        )["function-1"]
+        self.assertEqual(
+            ("broad", "second-incumbent"),
+            tuple(item.id for item in incumbency.assignments),
+        )
+        self.assertFalse(incumbency.vacant)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_function_assignment_changes.py

@@ -0,0 +1,375 @@
+from __future__ import annotations
+
+from dataclasses import replace
+import unittest
+from unittest.mock import patch
+
+from govoplan_core.auth import ApiPrincipal
+from govoplan_core.core.access import PrincipalRef
+from govoplan_core.core.change_sequence import ChangeSequenceEntry
+from govoplan_core.core.concurrency import RevisionConflictError
+from govoplan_core.core.organizations import OrganizationFunctionRef
+from govoplan_core.core.policy import FunctionAssignmentGovernanceDecision
+from govoplan_core.core.workflows import WorkflowInstanceRef
+from govoplan_core.db.base import Base
+from govoplan_core.db.session import configure_database, reset_database
+from govoplan_identity.backend.db import models as identity_models  # noqa: F401
+from govoplan_idm.backend.api.v1.schemas import FunctionAssignmentChangeCreateRequest
+from govoplan_idm.backend.api.v1.function_changes import _change_item
+from govoplan_idm.backend.db.models import (
+    IdmFunctionAssignmentChange,
+    IdmFunctionAssignmentChangeEvent,
+    IdmOrganizationFunctionAssignment,
+    IdmTenantSettings,
+)
+from govoplan_idm.backend.function_assignment_changes import (
+    create_function_assignment_change,
+    transition_function_assignment_change,
+)
+from govoplan_organizations.backend.db import models as organization_models  # noqa: F401
+
+
+class _Policy:
+    def resolve_function_assignment_action(self, session=None, *, request):
+        del session
+        steps = ("holder", "authority")
+        context = request.context
+        allowed = {
+            "submit": bool(context.get("candidate_is_actor")),
+            "approve_holder": bool(context.get("actor_is_holder")),
+            "approve_authority": bool(context.get("actor_is_authority")),
+            "accept_recipient": bool(context.get("candidate_is_actor")),
+            "request_changes": bool(
+                context.get("actor_is_holder") or context.get("actor_is_authority")
+            ),
+            "respond": bool(
+                context.get("actor_is_initiator") or context.get("candidate_is_actor")
+            ),
+            "reject": bool(
+                context.get("actor_is_holder") or context.get("actor_is_authority")
+            ),
+            "withdraw": bool(context.get("actor_is_initiator")),
+            "recover": request.actor.account_id == "admin",
+            "apply": bool(context.get("approvals_complete")),
+        }.get(request.action, False)
+        return FunctionAssignmentGovernanceDecision(
+            allowed=allowed,
+            reason=None if allowed else "Not eligible for this action.",
+            profile="holder_with_authority_clearance",
+            required_steps=steps,
+            authority_function_id="authority-function",
+            separation_of_duties=False,
+            request_expiry_hours=24,
+        )
+
+
+class _Workflow:
+    nodes = ("holder_review", "authority_review", "recipient_review")
+
+    def __init__(self) -> None:
+        self.instances: dict[str, WorkflowInstanceRef] = {}
+
+    def start_standard(self, session, principal, *, request):
+        del session, principal
+        instance_id = f"workflow-{request.idempotency_key}"
+        existing = self.instances.get(instance_id)
+        if existing is not None:
+            return replace(existing, replayed=True)
+        reference = WorkflowInstanceRef(
+            id=instance_id,
+            tenant_id=request.tenant_id,
+            definition_id="definition-1",
+            definition_revision_id="revision-1",
+            definition_revision=1,
+            definition_hash="a" * 64,
+            status="waiting",
+            current_step_id="step-holder_review",
+            current_node_id="holder_review",
+        )
+        self.instances[instance_id] = reference
+        return reference
+
+    def resolve_current_step(
+        self,
+        session,
+        principal,
+        *,
+        tenant_id,
+        instance_id,
+        resolution,
+    ):
+        del session, principal, tenant_id
+        current = self.instances[instance_id]
+        if resolution.expected_step_id != current.current_step_id:
+            raise ValueError("Workflow current step changed.")
+        if resolution.action == "changes":
+            return current
+        if resolution.action in {"reject", "cancel"}:
+            result = replace(
+                current,
+                status="completed",
+                current_step_id=None,
+                current_node_id=None,
+            )
+        else:
+            index = self.nodes.index(current.current_node_id or "") + 1
+            if index >= len(self.nodes):
+                result = replace(
+                    current,
+                    status="completed",
+                    current_step_id=None,
+                    current_node_id=None,
+                )
+            else:
+                node = self.nodes[index]
+                result = replace(
+                    current,
+                    current_step_id=f"step-{node}",
+                    current_node_id=node,
+                )
+        self.instances[instance_id] = result
+        return result
+
+    def get_instance(self, session, *, tenant_id, instance_id):
+        del session, tenant_id
+        return self.instances[instance_id]
+
+
+class _Registry:
+    def __init__(self) -> None:
+        self.policy = _Policy()
+        self.workflow = _Workflow()
+
+    def has_capability(self, name: str) -> bool:
+        return name in {
+            "policy.functionAssignmentGovernance",
+            "workflow.orchestration",
+        }
+
+    def capability(self, name: str):
+        if name == "policy.functionAssignmentGovernance":
+            return self.policy
+        if name == "workflow.orchestration":
+            return self.workflow
+        return None
+
+
+def principal(account_id: str, identity_id: str) -> ApiPrincipal:
+    return ApiPrincipal(
+        principal=PrincipalRef(
+            account_id=account_id,
+            membership_id=f"membership-{account_id}",
+            tenant_id="tenant-1",
+            identity_id=identity_id,
+            scopes=frozenset({"idm:function_change:decide"}),
+        ),
+        account=object(),
+        user=object(),
+    )
+
+
+def function() -> OrganizationFunctionRef:
+    return OrganizationFunctionRef(
+        id="target-function",
+        tenant_id="tenant-1",
+        organization_unit_id="unit-1",
+        slug="target",
+        name="Target function",
+        settings={
+            "assignment_governance": {
+                "request_profile": "holder_with_authority_clearance",
+                "authority_function_id": "authority-function",
+            }
+        },
+    )
+
+
+def payload() -> FunctionAssignmentChangeCreateRequest:
+    return FunctionAssignmentChangeCreateRequest(
+        kind="request",
+        function_id="target-function",
+        candidate_identity_id="candidate-identity",
+        candidate_account_id="candidate",
+        justification="The function is needed for the assigned work.",
+        idempotency_key="request-1",
+    )
+
+
+class FunctionAssignmentChangeTests(unittest.TestCase):
+    def setUp(self) -> None:
+        self.database = configure_database("sqlite:///:memory:")
+        Base.metadata.create_all(
+            self.database.engine,
+            tables=[
+                IdmOrganizationFunctionAssignment.__table__,
+                IdmFunctionAssignmentChange.__table__,
+                IdmFunctionAssignmentChangeEvent.__table__,
+                IdmTenantSettings.__table__,
+                ChangeSequenceEntry.__table__,
+            ],
+        )
+        self.registry = _Registry()
+
+    def tearDown(self) -> None:
+        reset_database(dispose=True)
+
+    def _add_reviewer_assignments(self, session) -> None:
+        session.add_all(
+            (
+                IdmOrganizationFunctionAssignment(
+                    id="holder-assignment",
+                    tenant_id="tenant-1",
+                    identity_id="holder-identity",
+                    account_id="holder",
+                    function_id="target-function",
+                    organization_unit_id="unit-1",
+                    source="direct",
+                    is_active=True,
+                    settings={},
+                ),
+                IdmOrganizationFunctionAssignment(
+                    id="authority-assignment",
+                    tenant_id="tenant-1",
+                    identity_id="authority-identity",
+                    account_id="authority",
+                    function_id="authority-function",
+                    organization_unit_id="unit-1",
+                    source="direct",
+                    is_active=True,
+                    settings={},
+                ),
+            )
+        )
+        session.flush()
+
+    def test_request_is_idempotent_and_applies_once_after_required_steps(self) -> None:
+        with self.database.session() as session:
+            self._add_reviewer_assignments(session)
+            change, replayed = create_function_assignment_change(
+                session,
+                principal=principal("candidate", "candidate-identity"),
+                registry=self.registry,
+                function=function(),
+                payload=payload(),
+            )
+            session.flush()
+            same, replay = create_function_assignment_change(
+                session,
+                principal=principal("candidate", "candidate-identity"),
+                registry=self.registry,
+                function=function(),
+                payload=payload(),
+            )
+            self.assertFalse(replayed)
+            self.assertTrue(replay)
+            self.assertEqual(change.id, same.id)
+            self.assertEqual("awaiting_holder", change.state)
+
+            transition_function_assignment_change(
+                session,
+                principal=principal("holder", "holder-identity"),
+                registry=self.registry,
+                change=change,
+                function=function(),
+                action="approve",
+                base_revision=1,
+                comment="Holder approval",
+                evidence=(),
+            )
+            self.assertEqual("awaiting_authority", change.state)
+            transition_function_assignment_change(
+                session,
+                principal=principal("authority", "authority-identity"),
+                registry=self.registry,
+                change=change,
+                function=function(),
+                action="approve",
+                base_revision=2,
+                comment="Authority approval",
+                evidence=(),
+            )
+            session.commit()
+
+            self.assertEqual("applied", change.state)
+            self.assertIsNotNone(change.resulting_assignment_id)
+            resulting = session.get(
+                IdmOrganizationFunctionAssignment,
+                change.resulting_assignment_id,
+            )
+            self.assertEqual("candidate-identity", resulting.identity_id)
+            self.assertEqual("governance", resulting.source)
+            self.assertEqual(
+                change.id,
+                resulting.settings["governance"]["change_id"],
+            )
+            self.assertEqual(
+                1,
+                session.query(IdmOrganizationFunctionAssignment)
+                .filter(
+                    IdmOrganizationFunctionAssignment.identity_id
+                    == "candidate-identity"
+                )
+                .count(),
+            )
+
+    def test_vacant_function_blocks_and_revision_claim_rejects_stale_action(
+        self,
+    ) -> None:
+        with self.database.session() as session:
+            change, _ = create_function_assignment_change(
+                session,
+                principal=principal("candidate", "candidate-identity"),
+                registry=self.registry,
+                function=function(),
+                payload=payload(),
+            )
+            session.flush()
+            self.assertEqual("blocked", change.state)
+            self.assertIn("vacant", change.outcome_reason)
+
+            self._add_reviewer_assignments(session)
+            change.state = "awaiting_holder"
+            change.resource_revision = 2
+            session.flush()
+            with self.assertRaises(RevisionConflictError):
+                transition_function_assignment_change(
+                    session,
+                    principal=principal("holder", "holder-identity"),
+                    registry=self.registry,
+                    change=change,
+                    function=function(),
+                    action="approve",
+                    base_revision=1,
+                    comment=None,
+                    evidence=(),
+                )
+
+    def test_historical_change_remains_readable_after_function_removal(self) -> None:
+        with self.database.session() as session:
+            change, _ = create_function_assignment_change(
+                session,
+                principal=principal("candidate", "candidate-identity"),
+                registry=self.registry,
+                function=function(),
+                payload=payload(),
+            )
+            session.flush()
+
+            with patch(
+                "govoplan_idm.backend.api.v1.function_changes._historical_function",
+                return_value=None,
+            ):
+                item = _change_item(
+                    session,
+                    principal("candidate", "candidate-identity"),
+                    change,
+                    include_events=False,
+                )
+
+            self.assertEqual(change.id, item.id)
+            self.assertEqual([], item.available_actions)
+            self.assertIn("no longer available", item.availability_reason)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_interface_documentation_contract.py

@@ -0,0 +1,39 @@
+from __future__ import annotations
+
+import unittest
+
+from govoplan_idm.backend.manifest import manifest
+
+
+class IdmInterfaceDocumentationContractTests(unittest.TestCase):
+    def test_route_and_contributed_action_remain_declared(self) -> None:
+        frontend = manifest.frontend
+        self.assertIsNotNone(frontend)
+        self.assertEqual(
+            {"/idm"},
+            {route.path for route in frontend.routes},  # type: ignore[union-attr]
+        )
+        self.assertEqual(
+            {"idm.action.view-function-assignments"},
+            {surface.id for surface in frontend.view_surfaces},  # type: ignore[union-attr]
+        )
+        self.assertTrue(all(item.icon == "users" for item in manifest.nav_items))
+
+    def test_topics_publish_workflow_blocker_and_consequence_metadata(self) -> None:
+        topics = {topic.id: topic for topic in manifest.documentation}
+        self.assertIn("idm.workflow.assign-function-to-identity", topics)
+        self.assertIn("idm.reference.assignment-governance", topics)
+        self.assertIn("idm.reference.fields-and-consequences", topics)
+
+        workflow = topics["idm.workflow.assign-function-to-identity"]
+        self.assertIn("idm.blocker.permission", workflow.metadata["help_contexts"])
+        governance = topics["idm.reference.assignment-governance"]
+        self.assertIn("function_decision", governance.metadata["consequence_classes"])
+        reference = topics["idm.reference.fields-and-consequences"]
+        self.assertIn("idm.field.acting-for", reference.metadata["help_contexts"])
+        self.assertIn("deactivate_or_expire", reference.metadata["consequence_classes"])
+
+
+if __name__ == "__main__":
+    unittest.main()
+

tests/test_migrations.py

@@ -0,0 +1,58 @@
+from __future__ import annotations
+
+import tempfile
+import unittest
+from pathlib import Path
+
+from alembic.runtime.migration import MigrationContext
+from sqlalchemy import create_engine, inspect
+
+from govoplan_core.db.migrations import migrate_database
+from govoplan_identity.backend.manifest import get_manifest as identity_manifest
+from govoplan_idm.backend.manifest import get_manifest as idm_manifest
+from govoplan_organizations.backend.manifest import (
+    get_manifest as organizations_manifest,
+)
+
+
+class IdmMigrationTests(unittest.TestCase):
+    def test_migrations_create_typed_relationship_tables_and_head(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="govoplan-idm-migration-") as directory:
+            url = f"sqlite:///{Path(directory) / 'idm.db'}"
+            migrate_database(
+                database_url=url,
+                enabled_modules=("identity", "organizations", "idm"),
+                manifest_factories=(
+                    identity_manifest,
+                    organizations_manifest,
+                    idm_manifest,
+                ),
+            )
+            engine = create_engine(url)
+            try:
+                with engine.connect() as connection:
+                    self.assertIn(
+                        "b1c2d3e4f5a6",
+                        set(MigrationContext.configure(connection).get_current_heads()),
+                    )
+                    self.assertEqual(
+                        {
+                            "idm_function_assignment_change_events",
+                            "idm_function_assignment_changes",
+                            "idm_identity_relationships",
+                            "idm_organization_function_assignments",
+                            "idm_tenant_settings",
+                            "idm_typed_groups",
+                        },
+                        {
+                            name
+                            for name in inspect(connection).get_table_names()
+                            if name.startswith("idm_")
+                        },
+                    )
+            finally:
+                engine.dispose()
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_relationships.py

@@ -0,0 +1,220 @@
+from __future__ import annotations
+
+import unittest
+from datetime import datetime, timedelta, timezone
+
+from govoplan_core.core.identity import IdentityAccountLinkRef, IdentityRef
+from govoplan_core.db.base import Base
+from govoplan_core.db.session import configure_database, reset_database
+from govoplan_identity.backend.db.models import CanonicalIdentity
+from govoplan_idm.backend.db.models import (
+    IdmIdentityRelationship,
+    IdmTypedGroup,
+)
+from govoplan_idm.backend.relationships import SqlIdmRelationshipDirectory
+
+
+class StubIdentityDirectory:
+    def __init__(self, identities: tuple[IdentityRef, ...]) -> None:
+        self._identities = {item.id: item for item in identities}
+
+    def get_identity(self, identity_id: str) -> IdentityRef | None:
+        return self._identities.get(identity_id)
+
+    def identity_for_account(self, account_id: str) -> IdentityRef | None:
+        return None
+
+    def identities_for_accounts(self, account_ids):
+        return ()
+
+    def accounts_for_identity(self, identity_id: str) -> tuple[IdentityAccountLinkRef, ...]:
+        return ()
+
+
+class IdmRelationshipDirectoryTests(unittest.TestCase):
+    def setUp(self) -> None:
+        self.database = configure_database("sqlite:///:memory:")
+        Base.metadata.create_all(
+            self.database.engine,
+            tables=[
+                CanonicalIdentity.__table__,
+                IdmTypedGroup.__table__,
+                IdmIdentityRelationship.__table__,
+            ],
+        )
+        identities = (
+            IdentityRef(id="identity-active", display_name="Active", status="active"),
+            IdentityRef(id="identity-future", display_name="Future", status="active"),
+            IdentityRef(id="identity-expired", display_name="Expired", status="active"),
+            IdentityRef(id="identity-revoked", display_name="Revoked", status="active"),
+            IdentityRef(id="identity-suspended", display_name="Suspended", status="suspended"),
+        )
+        self.directory = SqlIdmRelationshipDirectory(
+            identities=StubIdentityDirectory(identities)  # type: ignore[arg-type]
+        )
+        with self.database.session() as session:
+            session.add_all(
+                CanonicalIdentity(
+                    id=item.id,
+                    display_name=item.display_name,
+                    source="local",
+                    is_active=item.status == "active",
+                    settings={},
+                )
+                for item in identities
+            )
+            session.add_all(
+                (
+                    IdmTypedGroup(
+                        id="group-1",
+                        tenant_id="tenant-1",
+                        key="permit-holder",
+                        name="Permit holders",
+                        group_type="business_status",
+                        source_provider="ldap",
+                        source_resource_type="group",
+                        source_resource_id="cn=permit-holders,dc=example",
+                        source_revision="directory-42",
+                        properties={"classification": "resident"},
+                        provenance={"connector_id": "ldap-1"},
+                    ),
+                    IdmTypedGroup(
+                        id="group-other",
+                        tenant_id="tenant-2",
+                        key="other",
+                        name="Other tenant",
+                        group_type="business_status",
+                    ),
+                )
+            )
+            session.commit()
+
+    def tearDown(self) -> None:
+        reset_database(dispose=True)
+
+    @staticmethod
+    def _relationship(
+        relationship_id: str,
+        identity_id: str,
+        *,
+        boundary: datetime,
+        valid_from: datetime | None = None,
+        valid_until: datetime | None = None,
+        status: str = "active",
+    ) -> IdmIdentityRelationship:
+        return IdmIdentityRelationship(
+            id=relationship_id,
+            tenant_id="tenant-1",
+            relationship_kind="member",
+            subject_identity_id=identity_id,
+            target_group_id="group-1",
+            valid_from=valid_from,
+            valid_until=valid_until,
+            status=status,
+            revoked_at=boundary if status == "revoked" else None,
+            revoked_by="account-1" if status == "revoked" else None,
+            revocation_reason="No longer eligible" if status == "revoked" else None,
+            source_provider="ldap",
+            source_resource_type="membership",
+            source_resource_id=f"member:{identity_id}",
+            source_revision="directory-42",
+            properties={"rank": 1},
+            provenance={"sync_run_id": "sync-1"},
+            revision=1,
+        )
+
+    def test_resolution_explains_current_future_expired_revoked_and_lifecycle(self) -> None:
+        boundary = datetime(2026, 8, 2, 12, tzinfo=timezone.utc)
+        with self.database.session() as session:
+            session.add_all(
+                (
+                    self._relationship("active", "identity-active", boundary=boundary),
+                    self._relationship(
+                        "future",
+                        "identity-future",
+                        boundary=boundary,
+                        valid_from=boundary + timedelta(days=1),
+                    ),
+                    self._relationship(
+                        "expired",
+                        "identity-expired",
+                        boundary=boundary,
+                        valid_until=boundary,
+                    ),
+                    self._relationship(
+                        "revoked",
+                        "identity-revoked",
+                        boundary=boundary,
+                        status="revoked",
+                    ),
+                    self._relationship(
+                        "suspended",
+                        "identity-suspended",
+                        boundary=boundary,
+                    ),
+                )
+            )
+            session.commit()
+
+        resolved = self.directory.resolve_typed_group_memberships(
+            ("group-1",),
+            tenant_id="tenant-1",
+            effective_at=boundary,
+        )["group-1"]
+
+        self.assertEqual(("identity-active",), resolved.identity_ids)
+        self.assertEqual(
+            {
+                "active": "relationship.effective",
+                "future": "relationship.not_yet_effective",
+                "expired": "relationship.expired",
+                "revoked": "relationship.revoked",
+                "suspended": "identity.not_active",
+            },
+            {item.relationship.id: item.code for item in resolved.decisions},
+        )
+        self.assertEqual("directory-42", resolved.group.source_revision)
+        self.assertEqual("ldap", resolved.decisions[0].relationship.source_provider)
+
+    def test_forward_reverse_batch_queries_return_only_effective_relationships(self) -> None:
+        boundary = datetime(2026, 8, 2, 12, tzinfo=timezone.utc)
+        with self.database.session() as session:
+            session.add_all(
+                (
+                    self._relationship("active", "identity-active", boundary=boundary),
+                    self._relationship(
+                        "future",
+                        "identity-future",
+                        boundary=boundary,
+                        valid_from=boundary + timedelta(days=1),
+                    ),
+                )
+            )
+            session.commit()
+
+        forward = self.directory.identity_relationships_for_identities(
+            ("identity-active", "identity-future"),
+            tenant_id="tenant-1",
+            effective_at=boundary,
+        )
+        reverse = self.directory.identity_relationships_for_groups(
+            ("group-1",),
+            tenant_id="tenant-1",
+            effective_at=boundary,
+        )
+
+        self.assertEqual(("active",), tuple(item.id for item in forward["identity-active"]))
+        self.assertEqual((), forward["identity-future"])
+        self.assertEqual(("active",), tuple(item.id for item in reverse["group-1"]))
+
+    def test_cross_tenant_group_references_are_rejected(self) -> None:
+        with self.assertRaisesRegex(ValueError, "another tenant"):
+            self.directory.get_typed_group("group-other", tenant_id="tenant-1")
+        with self.assertRaisesRegex(ValueError, "another tenant"):
+            self.directory.identity_relationships_for_group(
+                "group-other", tenant_id="tenant-1"
+            )
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_search_source.py

@@ -0,0 +1,118 @@
+from __future__ import annotations
+
+from types import SimpleNamespace
+import unittest
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal
+from govoplan_core.core.access import PrincipalRef
+from govoplan_core.core.events import EventObjectRef, EventTenantRef, PlatformEvent
+from govoplan_core.core.search import (
+    SearchAuthorizationRequest,
+    SearchBackfillRequest,
+    SearchResourceReference,
+)
+from govoplan_core.db.base import Base
+from govoplan_idm.backend.db.models import IdmTypedGroup
+from govoplan_idm.backend.search_source import IdmSearchSource, PROVIDER_ID
+
+
+class IdmSearchSourceTests(unittest.TestCase):
+    def setUp(self) -> None:
+        self.engine = create_engine("sqlite://")
+        Base.metadata.create_all(
+            self.engine,
+            tables=(IdmTypedGroup.__table__,),
+        )
+        self.session = Session(self.engine)
+        self.session.add_all(
+            (
+                IdmTypedGroup(
+                    id="group-1",
+                    tenant_id="tenant-1",
+                    key="permit-holder",
+                    name="Permit holders",
+                    group_type="business_status",
+                ),
+                IdmTypedGroup(
+                    id="group-other",
+                    tenant_id="tenant-2",
+                    key="other",
+                    name="Other tenant",
+                    group_type="business_status",
+                ),
+            )
+        )
+        self.session.commit()
+        self.source = IdmSearchSource()
+
+    def tearDown(self) -> None:
+        self.session.close()
+        self.engine.dispose()
+
+    def test_typed_group_search_is_tenant_and_scope_bounded(self) -> None:
+        page = self.source.backfill(
+            self.session,
+            request=SearchBackfillRequest(
+                tenant_id="tenant-1",
+                provider_id=PROVIDER_ID,
+                resource_type="typed_group",
+                rebuild_id="rebuild-1",
+            ),
+        )
+        self.assertEqual(("group-1",), tuple(doc.resource_id for doc in page.documents))
+        reference = SearchResourceReference(
+            tenant_id="tenant-1",
+            module_id="idm",
+            resource_type="typed_group",
+            resource_id="group-1",
+        )
+        request = SearchAuthorizationRequest(reference=reference, source_revision="1")
+        self.assertTrue(
+            self.source.authorize(
+                self.session,
+                _principal({"idm:relationship:read"}),
+                requests=(request,),
+            )[reference.key]
+        )
+        self.assertFalse(
+            self.source.authorize(
+                self.session,
+                _principal(set()),
+                requests=(request,),
+            )[reference.key]
+        )
+
+    def test_typed_group_event_is_translated_to_an_upsert(self) -> None:
+        event = PlatformEvent(
+            type="idm.typed_group.updated",
+            module_id="idm",
+            tenant=EventTenantRef(id="tenant-1"),
+            resource=EventObjectRef(type="typed_group", id="group-1"),
+        )
+        change = self.source.index_changes_for_event(
+            self.session,
+            event=event,
+            delivery_key="delivery-1",
+        )[0]
+        self.assertEqual("upsert", change.kind)
+        self.assertEqual("group-1", change.reference.resource_id)
+
+
+def _principal(scopes: set[str]) -> ApiPrincipal:
+    return ApiPrincipal(
+        principal=PrincipalRef(
+            account_id="account-1",
+            membership_id="user-1",
+            tenant_id="tenant-1",
+            scopes=frozenset(scopes),
+        ),
+        account=SimpleNamespace(id="account-1"),
+        user=SimpleNamespace(id="user-1"),
+    )
+
+
+if __name__ == "__main__":
+    unittest.main()

webui/package.json

@@ -1,11 +1,14 @@
 {
   "name": "@govoplan/idm-webui",
-  "version": "0.1.8",
+  "version": "0.1.18",
   "private": true,
   "type": "module",
   "main": "src/index.ts",
   "module": "src/index.ts",
   "types": "src/index.ts",
+  "scripts": {
+    "test:interface-patterns": "node scripts/test-interface-pattern-language.mjs"
+  },
   "exports": {
     ".": {
       "types": "./src/index.ts",
@@ -14,14 +17,14 @@
     "./styles/idm.css": "./src/styles/idm.css"
   },
   "peerDependencies": {
-    "@govoplan/core-webui": "^0.1.8",
-    "@vitejs/plugin-react": "^4.3.4",
+    "@govoplan/core-webui": "^0.1.18",
+    "@vitejs/plugin-react": "^5.2.0",
     "lucide-react": "^1.23.0",
-    "react": "^19.0.0",
-    "react-dom": "^19.0.0",
-    "react-router-dom": "^7.1.1",
+    "react": ">=19.2.7 <20",
+    "react-dom": ">=19.2.7 <20",
+    "react-router": ">=8.3.0 <9",
     "typescript": "^5.7.2",
-    "vite": "^6.0.6"
+    "vite": "^7.3.6"
   },
   "peerDependenciesMeta": {
     "@govoplan/core-webui": {

webui/scripts/test-interface-pattern-language.mjs

@@ -0,0 +1,30 @@
+import { readFileSync } from "node:fs";
+
+function source(path) {
+  return readFileSync(new URL(path, import.meta.url), "utf8");
+}
+
+function assert(condition, message) {
+  if (!condition) throw new Error(message);
+}
+
+const page = source("../src/features/IdmPage.tsx");
+const changes = source("../src/features/FunctionAssignmentChangesPanel.tsx");
+const patterns = source("../src/features/interfacePatterns.ts");
+const moduleSource = source("../src/module.ts");
+const translations = source("../src/i18n/generatedTranslations.ts");
+const styles = source("../src/styles/idm.css");
+
+assert(page.includes("ActionBlockerHint") && page.includes("DocumentationHelpLink"), "IDM permissions and prerequisites expose actionable help");
+assert(page.includes("assignmentBaseline") && page.includes("draftKey(assignmentDraft) !== draftKey(assignmentBaseline)"), "Existing assignments compare against their loaded draft baseline");
+assert(page.includes("requestDiscard(() => void loadData())") && page.includes("closeAssignmentEditor"), "Reload and dialog close preserve actual dirty drafts");
+assert(page.includes("disabledReason") && changes.includes("disabledReason"), "Unavailable assignment and decision actions explain their state");
+assert(changes.includes("ConfirmDialog") && changes.includes("confirm_function_action"), "Governed function decisions require explicit shared confirmation");
+assert(changes.includes("useUnsavedDraftGuard") && changes.includes("usePlatformLanguage"), "Governed editors protect drafts and format dates with the platform locale");
+assert(patterns.includes('topicId: "idm.reference.fields-and-consequences"'), "IDM fields use manifest-backed consequence help");
+assert(moduleSource.includes('version: "0.1.8"') && moduleSource.includes('label: "i18n:govoplan-idm.view_assignments.2d40d6a5"'), "WebUI metadata matches the module release and localizes its action surface");
+assert(translations.includes('"i18n:govoplan-idm.state_awaiting_authority"'), "Governed states and decisions are in the translation catalogue");
+assert(!page.includes("window.confirm") && !changes.includes("window.confirm"), "IDM does not use browser-native consequential confirmation");
+assert(styles.includes(".idm-page") && !/\.idm-page\s*\{[^}]*max-width/s.test(styles), "The IDM workspace uses the full shared application width");
+
+console.log("IDM surfaces satisfy the recorded interface pattern-language contract.");

webui/src/api/idm.ts

@@ -1,4 +1,4 @@
-import { apiFetch, type ApiSettings } from "@govoplan/core-webui";
+import { apiFetch, apiPatchJson, apiPostJson, type ApiSettings } from "@govoplan/core-webui";
 
 export type OrganizationUnitItem = {
   id: string;
@@ -70,6 +70,10 @@ export type OrganizationFunctionAssignmentItem = {
 
 export type OrganizationFunctionAssignmentList = {
   assignments: OrganizationFunctionAssignmentItem[];
+  total?: number;
+  page?: number;
+  page_size?: number;
+  pages?: number;
 };
 
 export type IdmSettings = {
@@ -95,24 +99,115 @@ export type OrganizationFunctionAssignmentPayload = {
   is_active?: boolean;
   settings?: Record<string, unknown>;
   change_request_id?: string | null;
+  governance_override_reason?: string | null;
+  governance_override_evidence?: string[];
 };
 
 export type IdmSettingsPayload = Partial<Pick<IdmSettings, "require_assignment_change_requests" | "audit_detail_level" | "change_retention_days" | "settings">>;
 
-function post<T, P extends Record<string, unknown>>(settings: ApiSettings, path: string, payload: P): Promise<T> {
-  return apiFetch<T>(settings, path, { method: "POST", body: JSON.stringify(payload) });
-}
+export type FunctionAssignmentChangeKind = "request" | "grant";
+export type FunctionAssignmentChangeAction = "approve" | "reject" | "accept" | "request_changes" | "respond" | "withdraw" | "recover";
 
-function patch<T, P extends Record<string, unknown>>(settings: ApiSettings, path: string, payload: P): Promise<T> {
-  return apiFetch<T>(settings, path, { method: "PATCH", body: JSON.stringify(payload) });
-}
+export type FunctionAssignmentChangeEvent = {
+  id: string;
+  sequence: number;
+  action: string;
+  from_state?: string | null;
+  to_state: string;
+  actor_account_id?: string | null;
+  actor_identity_id?: string | null;
+  comment?: string | null;
+  evidence: string[];
+  policy_decision: Record<string, unknown>;
+  workflow_step_id?: string | null;
+  details: Record<string, unknown>;
+  created_at: string;
+};
+
+export type FunctionAssignmentChange = {
+  id: string;
+  tenant_id: string;
+  kind: FunctionAssignmentChangeKind;
+  state: string;
+  profile: string;
+  function_id: string;
+  organization_unit_id: string;
+  candidate_identity_id: string;
+  candidate_account_id?: string | null;
+  initiator_account_id: string;
+  initiator_identity_id?: string | null;
+  justification: string;
+  evidence: string[];
+  requested_valid_from?: string | null;
+  requested_valid_until?: string | null;
+  required_steps: string[];
+  completed_steps: string[];
+  policy_decision: Record<string, unknown>;
+  workflow_definition_revision?: number | null;
+  workflow_definition_hash?: string | null;
+  workflow_instance_id?: string | null;
+  resulting_assignment_id?: string | null;
+  expires_at?: string | null;
+  outcome_reason?: string | null;
+  resource_revision: number;
+  etag: string;
+  metadata: Record<string, unknown>;
+  events: FunctionAssignmentChangeEvent[];
+  available_actions: FunctionAssignmentChangeAction[];
+  availability_reason?: string | null;
+  created_at: string;
+  updated_at: string;
+};
+
+export type FunctionAssignmentChangeList = {
+  changes: FunctionAssignmentChange[];
+  total: number;
+  page: number;
+  page_size: number;
+  pages: number;
+};
+
+export type FunctionAssignmentChangePayload = {
+  kind: FunctionAssignmentChangeKind;
+  function_id: string;
+  candidate_identity_id: string;
+  candidate_account_id?: string | null;
+  justification: string;
+  evidence?: string[];
+  requested_valid_from?: string | null;
+  requested_valid_until?: string | null;
+  applies_to_subunits?: boolean;
+  assignment_source?: "governance" | "delegated";
+  represented_assignment_id?: string | null;
+  idempotency_key: string;
+  metadata?: Record<string, unknown>;
+};
 
 export function getOrganizationModel(settings: ApiSettings): Promise<OrganizationModel> {
   return apiFetch<OrganizationModel>(settings, "/api/v1/organizations/model");
 }
 
-export function getOrganizationFunctionAssignments(settings: ApiSettings): Promise<OrganizationFunctionAssignmentList> {
-  return apiFetch<OrganizationFunctionAssignmentList>(settings, "/api/v1/idm/organization-function-assignments");
+export async function getOrganizationFunctionAssignments(settings: ApiSettings): Promise<OrganizationFunctionAssignmentList> {
+  const pageSize = 500;
+  const assignments: OrganizationFunctionAssignmentItem[] = [];
+  let total = 0;
+  for (let page = 1; ; page += 1) {
+    const response = await apiFetch<OrganizationFunctionAssignmentList>(
+      settings,
+      `/api/v1/idm/organization-function-assignments?page=${page}&page_size=${pageSize}`
+    );
+    assignments.push(...response.assignments);
+    total = response.total ?? assignments.length;
+    if (page >= (response.pages ?? 1)) {
+      return {
+        assignments,
+        total,
+        page: 1,
+        page_size: assignments.length,
+        pages: 1
+      };
+    }
+  }
 }
 
 export function getIdmSettings(settings: ApiSettings): Promise<IdmSettings> {
@@ -120,7 +215,7 @@ export function getIdmSettings(settings: ApiSettings): Promise<IdmSettings> {
 }
 
 export function patchIdmSettings(settings: ApiSettings, payload: IdmSettingsPayload): Promise<IdmSettings> {
-  return patch(settings, "/api/v1/idm/settings", payload);
+  return apiPatchJson(settings, "/api/v1/idm/settings", payload);
 }
 
 export function searchOrganizationIdentityOptions(settings: ApiSettings, query = "", limit = 50): Promise<IdentityListResponse> {
@@ -135,7 +230,7 @@ export function createOrganizationFunctionAssignment(
   settings: ApiSettings,
   payload: OrganizationFunctionAssignmentPayload
 ): Promise<OrganizationFunctionAssignmentItem> {
-  return post(settings, "/api/v1/idm/organization-function-assignments", payload);
+  return apiPostJson(settings, "/api/v1/idm/organization-function-assignments", payload);
 }
 
 export function patchOrganizationFunctionAssignment(
@@ -143,5 +238,42 @@ export function patchOrganizationFunctionAssignment(
   id: string,
   payload: Partial<OrganizationFunctionAssignmentPayload>
 ): Promise<OrganizationFunctionAssignmentItem> {
-  return patch(settings, `/api/v1/idm/organization-function-assignments/${encodeURIComponent(id)}`, payload);
+  return apiPatchJson(settings, `/api/v1/idm/organization-function-assignments/${encodeURIComponent(id)}`, payload);
+}
+
+export function getFunctionAssignmentChanges(settings: ApiSettings): Promise<FunctionAssignmentChangeList> {
+  return apiFetch<FunctionAssignmentChangeList>(settings, "/api/v1/idm/function-assignment-changes?page_size=200");
+}
+
+export function getFunctionAssignmentChange(settings: ApiSettings, id: string): Promise<FunctionAssignmentChange> {
+  return apiFetch<FunctionAssignmentChange>(settings, `/api/v1/idm/function-assignment-changes/${encodeURIComponent(id)}`);
+}
+
+export function createFunctionAssignmentChange(
+  settings: ApiSettings,
+  payload: FunctionAssignmentChangePayload
+): Promise<FunctionAssignmentChange> {
+  return apiPostJson(settings, "/api/v1/idm/function-assignment-changes", payload);
+}
+
+export function actOnFunctionAssignmentChange(
+  settings: ApiSettings,
+  change: FunctionAssignmentChange,
+  action: FunctionAssignmentChangeAction,
+  comment?: string
+): Promise<FunctionAssignmentChange> {
+  return apiFetch<FunctionAssignmentChange>(
+    settings,
+    `/api/v1/idm/function-assignment-changes/${encodeURIComponent(change.id)}/actions`,
+    {
+      method: "POST",
+      headers: { "If-Match": change.etag },
+      body: JSON.stringify({
+        action,
+        base_revision: change.resource_revision,
+        comment: comment?.trim() || null,
+        evidence: []
+      })
+    }
+  );
 }

webui/src/features/FunctionAssignmentChangesPanel.tsx

@@ -0,0 +1,497 @@
+import { useCallback, useEffect, useMemo, useRef, useState, type FormEvent } from "react";
+import { Check, Eye, Plus, RotateCcw, Undo2, X } from "lucide-react";
+import {
+  AdminIconButton,
+  ApiError,
+  Button,
+  Card,
+  ConfirmDialog,
+  DataGrid,
+  Dialog,
+  DismissibleAlert,
+  DocumentationHelpLink,
+  FormField,
+  LoadingFrame,
+  SegmentedControl,
+  StatusBadge,
+  TableActionGroup,
+  hasScope,
+  i18nMessage,
+  usePlatformLanguage,
+  useUnsavedChanges,
+  useUnsavedDraftGuard,
+  type ApiSettings,
+  type AuthInfo,
+  type DataGridColumn
+} from "@govoplan/core-webui";
+import {
+  actOnFunctionAssignmentChange,
+  createFunctionAssignmentChange,
+  getFunctionAssignmentChange,
+  getFunctionAssignmentChanges,
+  type FunctionAssignmentChange,
+  type FunctionAssignmentChangeAction,
+  type FunctionAssignmentChangeKind,
+  type IdentityOption,
+  type OrganizationModel
+} from "../api/idm";
+import {
+  IDM_FIELD_DOCUMENTATION,
+  IDM_GOVERNANCE_DOCUMENTATION,
+  IDM_INTERFACE_I18N,
+  idmDisabledReason
+} from "./interfacePatterns";
+
+type Props = {
+  settings: ApiSettings;
+  auth: AuthInfo;
+  model: OrganizationModel;
+  identities: IdentityOption[];
+};
+
+type Draft = {
+  kind: FunctionAssignmentChangeKind;
+  functionId: string;
+  identityId: string;
+  accountId: string;
+  justification: string;
+  evidence: string;
+  validFrom: string;
+  validUntil: string;
+};
+
+function emptyDraft(auth: AuthInfo, kind: FunctionAssignmentChangeKind): Draft {
+  return {
+    kind,
+    functionId: "",
+    identityId: kind === "request" ? auth.principal?.identity_id ?? "" : "",
+    accountId: kind === "request" ? auth.principal?.account_id ?? "" : "",
+    justification: "",
+    evidence: "",
+    validFrom: "",
+    validUntil: ""
+  };
+}
+
+function errorMessage(error: unknown): string {
+  if (error instanceof ApiError) {
+    try {
+      const body = JSON.parse(error.body) as { detail?: string | { message?: string } };
+      if (typeof body.detail === "string") return body.detail;
+      if (body.detail?.message) return body.detail.message;
+    } catch {
+      // Use the transport message.
+    }
+    return error.message;
+  }
+  return error instanceof Error ? error.message : String(error);
+}
+
+function dateTimeValue(value: string): string | null {
+  return value ? new Date(value).toISOString() : null;
+}
+
+function statusTone(state: string): string {
+  if (state === "applied") return "success";
+  if (["rejected", "expired", "withdrawn", "cancelled"].includes(state)) return "inactive";
+  if (["blocked", "failed_manual_review"].includes(state)) return "danger";
+  return "warning";
+}
+
+const DOMAIN_LABELS: Record<string, string> = {
+  request: "i18n:govoplan-idm.kind_request",
+  grant: "i18n:govoplan-idm.kind_grant",
+  submitted: "i18n:govoplan-idm.state_submitted",
+  awaiting_holder: "i18n:govoplan-idm.state_awaiting_holder",
+  awaiting_authority: "i18n:govoplan-idm.state_awaiting_authority",
+  awaiting_recipient: "i18n:govoplan-idm.state_awaiting_recipient",
+  changes_requested: "i18n:govoplan-idm.state_changes_requested",
+  applied: "i18n:govoplan-idm.state_applied",
+  rejected: "i18n:govoplan-idm.state_rejected",
+  expired: "i18n:govoplan-idm.state_expired",
+  withdrawn: "i18n:govoplan-idm.state_withdrawn",
+  cancelled: "i18n:govoplan-idm.state_cancelled",
+  blocked: "i18n:govoplan-idm.state_blocked",
+  failed_manual_review: "i18n:govoplan-idm.state_failed_manual_review",
+  approve_holder: "i18n:govoplan-idm.step_approve_holder",
+  approve_authority: "i18n:govoplan-idm.step_approve_authority",
+  accept_recipient: "i18n:govoplan-idm.step_accept_recipient",
+  holder_review: "i18n:govoplan-idm.profile_holder_review",
+  authority_review: "i18n:govoplan-idm.profile_authority_review",
+  recipient_review: "i18n:govoplan-idm.profile_recipient_review",
+  approve: "i18n:govoplan-idm.action_approve",
+  reject: "i18n:govoplan-idm.action_reject",
+  accept: "i18n:govoplan-idm.action_accept",
+  request_changes: "i18n:govoplan-idm.action_request_changes",
+  respond: "i18n:govoplan-idm.action_respond",
+  withdraw: "i18n:govoplan-idm.action_withdraw",
+  recover: "i18n:govoplan-idm.action_recheck"
+};
+
+function domainLabel(value: string): string {
+  return DOMAIN_LABELS[value] ?? value.replaceAll("_", " ");
+}
+
+function actionLabel(action: FunctionAssignmentChangeAction): string {
+  return {
+    approve: "i18n:govoplan-idm.action_approve",
+    reject: "i18n:govoplan-idm.action_reject",
+    accept: "i18n:govoplan-idm.action_accept",
+    request_changes: "i18n:govoplan-idm.action_request_changes",
+    respond: "i18n:govoplan-idm.action_respond",
+    withdraw: "i18n:govoplan-idm.action_withdraw",
+    recover: "i18n:govoplan-idm.action_recheck"
+  }[action];
+}
+
+function actionIcon(action: FunctionAssignmentChangeAction): JSX.Element {
+  const props = { size: 16, "aria-hidden": true as const };
+  if (action === "approve" || action === "accept") return <Check {...props} />;
+  if (action === "reject") return <X {...props} />;
+  if (action === "request_changes") return <Undo2 {...props} />;
+  if (action === "recover") return <RotateCcw {...props} />;
+  return <Undo2 {...props} />;
+}
+
+export default function FunctionAssignmentChangesPanel({ settings, auth, model, identities }: Props) {
+  const canRequest = hasScope(auth, "idm:function_request:create");
+  const canGrant = hasScope(auth, "idm:function_grant:create") || hasScope(auth, "idm:organization_assignment:write");
+  const visible = canRequest || canGrant || hasScope(auth, "idm:function_change:read") || hasScope(auth, "idm:function_change:decide") || hasScope(auth, "idm:function_change:admin");
+  const initialKind: FunctionAssignmentChangeKind = canRequest ? "request" : "grant";
+  const [changes, setChanges] = useState<FunctionAssignmentChange[]>([]);
+  const [draft, setDraft] = useState<Draft>(() => emptyDraft(auth, initialKind));
+  const [draftBaseline, setDraftBaseline] = useState<Draft>(() => emptyDraft(auth, initialKind));
+  const [selected, setSelected] = useState<FunctionAssignmentChange | null>(null);
+  const [createOpen, setCreateOpen] = useState(false);
+  const [detailOpen, setDetailOpen] = useState(false);
+  const [comment, setComment] = useState("");
+  const [loading, setLoading] = useState(false);
+  const [busy, setBusy] = useState(false);
+  const [error, setError] = useState("");
+  const [pendingAction, setPendingAction] = useState<FunctionAssignmentChangeAction | null>(null);
+  const { language } = usePlatformLanguage();
+  const { requestDiscard } = useUnsavedChanges();
+  const initialChangeId = useMemo(() => {
+    if (typeof window === "undefined") return "";
+    return new URLSearchParams(window.location.search).get("change") ?? "";
+  }, []);
+  const initialChangeOpened = useRef(false);
+  const functionById = useMemo(() => new Map(model.functions.map((item) => [item.id, item])), [model.functions]);
+  const identityById = useMemo(() => new Map(identities.map((item) => [item.id, item])), [identities]);
+  const selectedIdentity = identityById.get(draft.identityId);
+  const draftDirty = createOpen && draftKey(draft) !== draftKey(draftBaseline);
+
+  useUnsavedDraftGuard({
+    dirty: draftDirty,
+    title: "Unsaved function change",
+    message: "Save or discard the function request or grant before leaving this surface.",
+    onSave: submit,
+    onDiscard: discardCreateDraft
+  });
+
+  const load = useCallback(async () => {
+    if (!visible) return;
+    setLoading(true);
+    setError("");
+    try {
+      const response = await getFunctionAssignmentChanges(settings);
+      setChanges(response.changes);
+      if (initialChangeId && !initialChangeOpened.current) {
+        initialChangeOpened.current = true;
+        const detail = await getFunctionAssignmentChange(settings, initialChangeId);
+        setSelected(detail);
+        setDetailOpen(true);
+      }
+    } catch (caught) {
+      setError(errorMessage(caught));
+    } finally {
+      setLoading(false);
+    }
+  }, [initialChangeId, settings, visible]);
+
+  useEffect(() => {
+    void load();
+  }, [load]);
+
+  if (!visible) return null;
+
+  function setKind(kind: FunctionAssignmentChangeKind) {
+    const next = emptyDraft(auth, kind);
+    setDraft(next);
+    setDraftBaseline(next);
+  }
+
+  function openCreate() {
+    const next = emptyDraft(auth, initialKind);
+    setDraft(next);
+    setDraftBaseline(next);
+    setCreateOpen(true);
+  }
+
+  function discardCreateDraft() {
+    const next = emptyDraft(auth, initialKind);
+    setDraft(next);
+    setDraftBaseline(next);
+    setCreateOpen(false);
+  }
+
+  function closeCreate() {
+    if (busy) return;
+    if (draftDirty) requestDiscard(discardCreateDraft);
+    else discardCreateDraft();
+  }
+
+  function setIdentity(identityId: string) {
+    const identity = identityById.get(identityId);
+    setDraft((current) => ({
+      ...current,
+      identityId,
+      accountId: identity?.primary_account_id ?? identity?.account_ids[0] ?? ""
+    }));
+  }
+
+  async function openDetail(item: FunctionAssignmentChange) {
+    setBusy(true);
+    setError("");
+    try {
+      const detail = await getFunctionAssignmentChange(settings, item.id);
+      setSelected(detail);
+      setComment("");
+      setDetailOpen(true);
+    } catch (caught) {
+      setError(errorMessage(caught));
+    } finally {
+      setBusy(false);
+    }
+  }
+
+  async function submit(event?: FormEvent): Promise<boolean> {
+    event?.preventDefault();
+    if (!draft.functionId || !draft.identityId || !draft.justification.trim()) return false;
+    setBusy(true);
+    setError("");
+    try {
+      const created = await createFunctionAssignmentChange(settings, {
+        kind: draft.kind,
+        function_id: draft.functionId,
+        candidate_identity_id: draft.identityId,
+        candidate_account_id: draft.accountId || null,
+        justification: draft.justification.trim(),
+        evidence: draft.evidence.split(/\r?\n/).map((item) => item.trim()).filter(Boolean),
+        requested_valid_from: dateTimeValue(draft.validFrom),
+        requested_valid_until: dateTimeValue(draft.validUntil),
+        idempotency_key: crypto.randomUUID(),
+        metadata: {}
+      });
+      setCreateOpen(false);
+      const next = emptyDraft(auth, initialKind);
+      setDraft(next);
+      setDraftBaseline(next);
+      setSelected(created);
+      setDetailOpen(true);
+      await load();
+      return true;
+    } catch (caught) {
+      setError(errorMessage(caught));
+      return false;
+    } finally {
+      setBusy(false);
+    }
+  }
+
+  async function performAction(action: FunctionAssignmentChangeAction) {
+    if (!selected) return;
+    setBusy(true);
+    setError("");
+    try {
+      const updated = await actOnFunctionAssignmentChange(settings, selected, action, comment);
+      setSelected(updated);
+      setComment("");
+      await load();
+    } catch (caught) {
+      setError(errorMessage(caught));
+    } finally {
+      setBusy(false);
+    }
+  }
+
+  const columns: DataGridColumn<FunctionAssignmentChange>[] = [
+    { id: "kind", header: "Kind", width: 110, sortable: true, filterable: true, value: (row) => row.kind, render: (row) => domainLabel(row.kind) },
+    {
+      id: "function",
+      header: "Function",
+      minWidth: 220,
+      sortable: true,
+      filterable: true,
+      value: (row) => functionById.get(row.function_id)?.name ?? row.function_id,
+      render: (row) => functionById.get(row.function_id)?.name ?? row.function_id
+    },
+    {
+      id: "candidate",
+      header: "Candidate",
+      minWidth: 220,
+      sortable: true,
+      filterable: true,
+      value: (row) => identityById.get(row.candidate_identity_id)?.display_name ?? row.candidate_identity_id,
+      render: (row) => identityById.get(row.candidate_identity_id)?.display_name ?? row.candidate_identity_id
+    },
+    { id: "state", header: "State", width: 170, sortable: true, filterable: true, value: (row) => row.state, render: (row) => <StatusBadge status={statusTone(row.state)} label={domainLabel(row.state)} /> },
+    { id: "progress", header: "Decisions", width: 140, value: (row) => `${row.completed_steps.length}/${row.required_steps.length}`, render: (row) => `${row.completed_steps.length} / ${row.required_steps.length}` },
+    { id: "updated", header: "Updated", width: 170, sortable: true, value: (row) => row.updated_at, render: (row) => new Date(row.updated_at).toLocaleString(language) },
+    { id: "actions", header: "Actions", width: 72, sticky: "end", render: (row) => <TableActionGroup actions={[{ id: "view", label: "Open change", icon: <Eye size={16} aria-hidden="true" />, onClick: () => void openDetail(row) }]} /> }
+  ];
+
+  return (
+    <>
+      {error && <DismissibleAlert tone="danger" resetKey={error}>{error}</DismissibleAlert>}
+      <Card
+        title="Function requests and grants"
+        collapsible
+        collapseKey="idm.function-assignment-changes"
+        actions={(
+          <div className="button-row compact-actions">
+            <DocumentationHelpLink reference={IDM_GOVERNANCE_DOCUMENTATION} />
+            {(canRequest || canGrant) ? <AdminIconButton label="Start governed change" icon={<Plus size={16} aria-hidden="true" />} variant="primary" disabled={busy} disabledReason={idmDisabledReason(false, busy)} onClick={openCreate} /> : null}
+          </div>
+        )}
+      >
+        <LoadingFrame loading={loading} label="Loading governed function changes">
+          <DataGrid id="idm-function-assignment-changes" rows={changes} columns={columns} getRowKey={(row) => row.id} emptyText="No governed function changes" initialFit="container" />
+        </LoadingFrame>
+      </Card>
+
+      <Dialog
+        open={createOpen}
+        title="Start governed function change"
+        className="admin-dialog admin-dialog-wide idm-change-dialog"
+        onClose={closeCreate}
+        closeDisabled={busy}
+        footer={<><Button type="button" onClick={closeCreate} disabled={busy} disabledReason={idmDisabledReason(false, busy)}>Cancel</Button><Button type="submit" form="idm-change-create" variant="primary" disabled={busy || !draft.functionId || !draft.identityId || !draft.justification.trim()} disabledReason={idmDisabledReason(false, busy) ?? ((!draft.functionId || !draft.identityId || !draft.justification.trim()) ? IDM_INTERFACE_I18N.incomplete : undefined)}>Submit</Button></>}
+      >
+        <form id="idm-change-create" className="admin-form-grid two-columns" onSubmit={(event) => void submit(event)}>
+          <div className="wide">
+            <SegmentedControl
+              ariaLabel="Function change kind"
+              value={draft.kind}
+              onChange={setKind}
+              options={[
+                { id: "request", label: "Request function", disabled: !canRequest },
+                { id: "grant", label: "Grant function", disabled: !canGrant }
+              ]}
+            />
+          </div>
+          <FormField label="Function" documentation={IDM_FIELD_DOCUMENTATION}>
+            <select value={draft.functionId} onChange={(event) => setDraft((current) => ({ ...current, functionId: event.target.value }))} disabled={busy}>
+              <option value="">Select function</option>
+              {model.functions.filter((item) => item.is_active).map((item) => <option key={item.id} value={item.id}>{item.name}</option>)}
+            </select>
+          </FormField>
+          <FormField label="Candidate identity" documentation={IDM_FIELD_DOCUMENTATION}>
+            <select value={draft.identityId} onChange={(event) => setIdentity(event.target.value)} disabled={busy || draft.kind === "request"}>
+              <option value="">Select identity</option>
+              {identities.map((item) => <option key={item.id} value={item.id}>{item.display_name || item.external_subject || item.id}</option>)}
+            </select>
+          </FormField>
+          <FormField label="Candidate account" documentation={IDM_FIELD_DOCUMENTATION}>
+            <select value={draft.accountId} onChange={(event) => setDraft((current) => ({ ...current, accountId: event.target.value }))} disabled={busy}>
+              <option value="">No linked account</option>
+              {(selectedIdentity?.account_ids ?? []).map((accountId) => <option key={accountId} value={accountId}>{accountId}</option>)}
+            </select>
+          </FormField>
+          <FormField label="Valid from" documentation={IDM_FIELD_DOCUMENTATION}>
+            <input type="datetime-local" value={draft.validFrom} onChange={(event) => setDraft((current) => ({ ...current, validFrom: event.target.value }))} disabled={busy} />
+          </FormField>
+          <FormField label="Valid until" documentation={IDM_FIELD_DOCUMENTATION}>
+            <input type="datetime-local" value={draft.validUntil} onChange={(event) => setDraft((current) => ({ ...current, validUntil: event.target.value }))} disabled={busy} />
+          </FormField>
+          <div className="wide">
+            <FormField label="Justification" documentation={IDM_FIELD_DOCUMENTATION}>
+              <textarea rows={4} value={draft.justification} onChange={(event) => setDraft((current) => ({ ...current, justification: event.target.value }))} disabled={busy} />
+            </FormField>
+          </div>
+          <div className="wide">
+            <FormField label="Evidence references (one per line)" documentation={IDM_FIELD_DOCUMENTATION}>
+              <textarea rows={3} value={draft.evidence} onChange={(event) => setDraft((current) => ({ ...current, evidence: event.target.value }))} disabled={busy} />
+            </FormField>
+          </div>
+        </form>
+      </Dialog>
+
+      <Dialog
+        open={detailOpen && selected !== null}
+        title={selected
+          ? i18nMessage(
+              selected.kind === "request"
+                ? "i18n:govoplan-idm.function_request_title"
+                : "i18n:govoplan-idm.function_grant_title",
+              { function: functionById.get(selected.function_id)?.name ?? selected.function_id }
+            )
+          : "Function change"}
+        className="admin-dialog admin-dialog-wide idm-change-dialog"
+        onClose={() => !busy && setDetailOpen(false)}
+        closeDisabled={busy}
+        footer={<Button type="button" onClick={() => setDetailOpen(false)} disabled={busy} disabledReason={idmDisabledReason(false, busy)}>Close</Button>}
+      >
+        {selected && (
+          <div className="idm-change-detail">
+            <dl className="idm-change-summary">
+              <div><dt>State</dt><dd><StatusBadge status={statusTone(selected.state)} label={domainLabel(selected.state)} /></dd></div>
+              <div><dt>Candidate</dt><dd>{identityById.get(selected.candidate_identity_id)?.display_name ?? selected.candidate_identity_id}</dd></div>
+              <div><dt>Profile</dt><dd>{domainLabel(selected.profile)}</dd></div>
+              <div><dt>Workflow revision</dt><dd>{selected.workflow_definition_revision ?? "-"}</dd></div>
+              <div><dt>Required decisions</dt><dd>{selected.required_steps.map(domainLabel).join(", ") || "None"}</dd></div>
+              <div><dt>Completed decisions</dt><dd>{selected.completed_steps.map(domainLabel).join(", ") || "None"}</dd></div>
+              <div className="wide"><dt>Justification</dt><dd>{selected.justification}</dd></div>
+              {selected.outcome_reason && <div className="wide"><dt>Explanation</dt><dd>{selected.outcome_reason}</dd></div>}
+            </dl>
+            {selected.available_actions.length > 0 && (
+              <div className="idm-change-actions">
+                <FormField label="Decision comment" documentation={IDM_FIELD_DOCUMENTATION}>
+                  <textarea rows={2} value={comment} onChange={(event) => setComment(event.target.value)} disabled={busy} />
+                </FormField>
+                <div className="button-row compact-actions">
+                  {selected.available_actions.map((action) => (
+                    <Button key={action} type="button" variant={action === "reject" ? "danger" : action === "approve" || action === "accept" ? "primary" : "secondary"} disabled={busy} disabledReason={idmDisabledReason(false, busy)} onClick={() => setPendingAction(action)}>
+                      {actionIcon(action)} {actionLabel(action)}
+                    </Button>
+                  ))}
+                </div>
+              </div>
+            )}
+            {selected.availability_reason && selected.available_actions.length === 0 && <p className="idm-muted">{selected.availability_reason}</p>}
+            <div>
+              <h3>History</h3>
+              <ol className="idm-change-history">
+                {selected.events.map((event) => <li key={event.id}><strong>{domainLabel(event.action)}</strong><span>{new Date(event.created_at).toLocaleString(language)}</span><span>{event.from_state ? `${domainLabel(event.from_state)} -> ` : ""}{domainLabel(event.to_state)}</span>{event.comment && <p>{event.comment}</p>}</li>)}
+              </ol>
+            </div>
+          </div>
+        )}
+      </Dialog>
+      <ConfirmDialog
+        open={Boolean(pendingAction && selected)}
+        title="Confirm function decision"
+        message={pendingAction && selected
+          ? i18nMessage("i18n:govoplan-idm.confirm_function_action", {
+              action: actionLabel(pendingAction),
+              function: functionById.get(selected.function_id)?.name ?? selected.function_id
+            })
+          : ""}
+        confirmLabel={pendingAction ? actionLabel(pendingAction) : "Confirm"}
+        tone={pendingAction === "reject" || pendingAction === "withdraw" ? "danger" : "default"}
+        busy={busy}
+        onConfirm={() => {
+          if (!pendingAction) return;
+          const action = pendingAction;
+          setPendingAction(null);
+          void performAction(action);
+        }}
+        onCancel={() => setPendingAction(null)}
+      />
+    </>
+  );
+}
+
+function draftKey(value: unknown): string {
+  return JSON.stringify(value);
+}

webui/src/features/IdmPage.tsx

@@ -1,6 +1,7 @@
 import { useCallback, useEffect, useMemo, useRef, useState, type FormEvent } from "react";
 import { Edit3, Plus, RefreshCw } from "lucide-react";
 import {
+  ActionBlockerHint,
   AdminIconButton,
   ApiError,
   Button,
@@ -8,11 +9,16 @@ import {
   DataGrid,
   Dialog,
   DismissibleAlert,
+  DocumentationHelpLink,
   FormField,
   LoadingFrame,
+  PageScrollViewport,
   PageTitle,
   StatusBadge,
+  TableActionGroup,
+  ToggleSwitch,
   hasScope,
+  useUnsavedChanges,
   useUnsavedDraftGuard,
   type ApiSettings,
   type AuthInfo,
@@ -34,6 +40,14 @@ import {
   type OrganizationModel,
   type OrganizationUnitItem
 } from "../api/idm";
+import FunctionAssignmentChangesPanel from "./FunctionAssignmentChangesPanel";
+import {
+  IDM_DOCUMENTATION,
+  IDM_FIELD_DOCUMENTATION,
+  IDM_GOVERNANCE_DOCUMENTATION,
+  IDM_INTERFACE_I18N,
+  idmDisabledReason
+} from "./interfacePatterns";
 
 type IdmPageProps = {
   settings: ApiSettings;
@@ -49,6 +63,8 @@ type AssignmentDraft = {
   delegated_from_assignment_id: string;
   acting_for_account_id: string;
   is_active: boolean;
+  governance_override_reason: string;
+  governance_override_evidence: string;
 };
 
 type SettingsDraft = {
@@ -88,7 +104,9 @@ function emptyAssignmentDraft(): AssignmentDraft {
     source: "direct",
     delegated_from_assignment_id: "",
     acting_for_account_id: "",
-    is_active: true
+    is_active: true,
+    governance_override_reason: "",
+    governance_override_evidence: ""
   };
 }
 
@@ -107,7 +125,12 @@ function assignmentPayload(draft: AssignmentDraft): OrganizationFunctionAssignme
     delegated_from_assignment_id: textOrNull(draft.delegated_from_assignment_id),
     acting_for_account_id: textOrNull(draft.acting_for_account_id),
     is_active: draft.is_active,
-    settings: {}
+    settings: {},
+    governance_override_reason: textOrNull(draft.governance_override_reason),
+    governance_override_evidence: draft.governance_override_evidence
+      .split(/\r?\n/)
+      .map((item) => item.trim())
+      .filter(Boolean)
   };
 }
 
@@ -120,23 +143,12 @@ function assignmentDraftFrom(item: OrganizationFunctionAssignmentItem): Assignme
     source: item.source || "direct",
     delegated_from_assignment_id: item.delegated_from_assignment_id ?? "",
     acting_for_account_id: item.acting_for_account_id ?? "",
-    is_active: item.is_active
+    is_active: item.is_active,
+    governance_override_reason: "",
+    governance_override_evidence: ""
   };
 }
 
-function isAssignmentDirty(draft: AssignmentDraft): boolean {
-  return Boolean(
-    draft.identity_id ||
-    draft.account_id ||
-    draft.function_id ||
-    draft.applies_to_subunits ||
-    draft.source !== "direct" ||
-    draft.delegated_from_assignment_id ||
-    draft.acting_for_account_id ||
-    !draft.is_active
-  );
-}
-
 function settingsDraftFrom(item: IdmSettings | null): SettingsDraft {
   const source = item ?? DEFAULT_IDM_SETTINGS;
   return {
@@ -221,6 +233,16 @@ function sourceLabel(value: string): string {
   return SOURCE_OPTIONS.find((item) => item.value === value)?.label ?? value;
 }
 
+function isGovernedFunction(item: OrganizationFunctionItem | undefined): boolean {
+  const governance = item?.settings.assignment_governance;
+  if (!governance || typeof governance !== "object" || Array.isArray(governance)) return false;
+  const values = governance as Record<string, unknown>;
+  return ["request_profile", "grant_profile"].some((key) => {
+    const value = String(values[key] ?? "unavailable").trim().toLowerCase();
+    return Boolean(value && value !== "unavailable");
+  });
+}
+
 function idmInitialQuery(): { assignmentId: string; functionId: string } {
   if (typeof window === "undefined") return { assignmentId: "", functionId: "" };
   const params = new URLSearchParams(window.location.search);
@@ -242,6 +264,7 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
   const [actingForOptions, setActingForOptions] = useState<IdentityOption[]>([]);
   const [actingForLoading, setActingForLoading] = useState(false);
   const [assignmentDraft, setAssignmentDraft] = useState<AssignmentDraft>(() => emptyAssignmentDraft());
+  const [assignmentBaseline, setAssignmentBaseline] = useState<AssignmentDraft>(() => emptyAssignmentDraft());
   const [settingsDraft, setSettingsDraft] = useState<SettingsDraft>(() => settingsDraftFrom(null));
   const [editingAssignmentId, setEditingAssignmentId] = useState<string | null>(null);
   const [assignmentEditorOpen, setAssignmentEditorOpen] = useState(false);
@@ -252,6 +275,7 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
   const [success, setSuccess] = useState("");
   const initialQuery = useMemo(() => idmInitialQuery(), []);
   const appliedInitialQueryRef = useRef(false);
+  const { requestDiscard } = useUnsavedChanges();
 
   const canManage = hasScope(auth, "idm:organization_assignment:write") || hasScope(auth, "organizations:function:assign");
   const canSearchIdentities = canManage || hasScope(auth, "idm:organization_identity:read") || hasScope(auth, "admin:users:read");
@@ -262,6 +286,7 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
   const identityOptionById = useMemo(() => mapById(identityOptions), [identityOptions]);
   const actingForOptionById = useMemo(() => mapById(actingForOptions), [actingForOptions]);
   const selectedIdentity = identityOptionById.get(assignmentDraft.identity_id);
+  const selectedFunctionIsGoverned = isGovernedFunction(functionById.get(assignmentDraft.function_id));
 
   const identitySelectOptions = useMemo(() => {
     if (!assignmentDraft.identity_id || identityOptionById.has(assignmentDraft.identity_id)) return identityOptions;
@@ -302,7 +327,7 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
     return Array.from(values).sort((left, right) => left.localeCompare(right));
   }, [actingForOptionById, actingForOptions, assignmentDraft.acting_for_account_id, identityOptionById, sourceAssignment]);
   const initialFunctionFilter = initialQuery.functionId;
-  const hasDirtyAssignmentDraft = assignmentEditorOpen && isAssignmentDirty(assignmentDraft);
+  const hasDirtyAssignmentDraft = assignmentEditorOpen && draftKey(assignmentDraft) !== draftKey(assignmentBaseline);
   const hasDirtySettingsDraft = canReadSettings && isSettingsDirty(settingsDraft, idmSettings);
   const hasDirtyDraft = hasDirtyAssignmentDraft || hasDirtySettingsDraft;
 
@@ -324,7 +349,9 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
         if (initialAssignment) {
           appliedInitialQueryRef.current = true;
           setEditingAssignmentId(initialAssignment.id);
-          setAssignmentDraft(assignmentDraftFrom(initialAssignment));
+          const nextDraft = assignmentDraftFrom(initialAssignment);
+          setAssignmentDraft(nextDraft);
+          setAssignmentBaseline(nextDraft);
           setAssignmentEditorOpen(true);
         }
       }
@@ -409,7 +436,9 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
   }, [loadData]);
 
   const discardAssignmentDraft = useCallback(() => {
-    setAssignmentDraft(emptyAssignmentDraft());
+    const nextDraft = emptyAssignmentDraft();
+    setAssignmentDraft(nextDraft);
+    setAssignmentBaseline(nextDraft);
     setEditingAssignmentId(null);
     setAssignmentEditorOpen(false);
     setAssignmentChangeRequestId("");
@@ -447,6 +476,10 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
       setError("i18n:govoplan-idm.function_is_required.5cce5b41");
       return false;
     }
+    if (selectedFunctionIsGoverned && !assignmentDraft.governance_override_reason.trim()) {
+      setError("Direct changes to this governed function require an emergency override reason.");
+      return false;
+    }
     const requestId = textOrNull(assignmentChangeRequestId);
     const payload = requestId ? { ...assignmentPayload(assignmentDraft), change_request_id: requestId } : assignmentPayload(assignmentDraft);
     const ok = await runAction(
@@ -455,7 +488,7 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
     );
     if (ok) discardAssignmentDraft();
     return ok;
-  }, [assignmentChangeRequestId, assignmentDraft, canManage, discardAssignmentDraft, editingAssignmentId, runAction, settings]);
+  }, [assignmentChangeRequestId, assignmentDraft, canManage, discardAssignmentDraft, editingAssignmentId, runAction, selectedFunctionIsGoverned, settings]);
 
   const saveDrafts = useCallback(async (): Promise<boolean> => {
     if (hasDirtyAssignmentDraft && !(await submitAssignment())) return false;
@@ -473,18 +506,28 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
 
   const openCreateAssignment = useCallback(() => {
     setEditingAssignmentId(null);
-    setAssignmentDraft({ ...emptyAssignmentDraft(), function_id: initialFunctionFilter && functionById.has(initialFunctionFilter) ? initialFunctionFilter : "" });
+    const nextDraft = { ...emptyAssignmentDraft(), function_id: initialFunctionFilter && functionById.has(initialFunctionFilter) ? initialFunctionFilter : "" };
+    setAssignmentDraft(nextDraft);
+    setAssignmentBaseline(nextDraft);
     setAssignmentChangeRequestId("");
     setAssignmentEditorOpen(true);
   }, [functionById, initialFunctionFilter]);
 
   const editAssignment = useCallback((item: OrganizationFunctionAssignmentItem) => {
+    const nextDraft = assignmentDraftFrom(item);
     setEditingAssignmentId(item.id);
-    setAssignmentDraft(assignmentDraftFrom(item));
+    setAssignmentDraft(nextDraft);
+    setAssignmentBaseline(nextDraft);
     setAssignmentChangeRequestId("");
     setAssignmentEditorOpen(true);
   }, []);
 
+  const closeAssignmentEditor = useCallback(() => {
+    if (busy) return;
+    if (hasDirtyAssignmentDraft) requestDiscard(discardAssignmentDraft);
+    else discardAssignmentDraft();
+  }, [busy, discardAssignmentDraft, hasDirtyAssignmentDraft, requestDiscard]);
+
   function onIdentityChange(identityId: string) {
     const identity = identityOptionById.get(identityId);
     setAssignmentDraft({
@@ -559,18 +602,22 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
     },
     {
       id: "actions",
-      header: "",
-      width: 88,
+      header: "Actions",
+      width: 72,
       sticky: "end",
-      render: (row) => (
-        <div className="idm-row-actions">
-          <AdminIconButton label="i18n:govoplan-idm.edit.a5a0f3cc" icon={<Edit3 size={16} aria-hidden="true" />} disabled={!canManage || busy} onClick={() => editAssignment(row)} />
-        </div>
-      )
+      render: (row) => <TableActionGroup actions={[{
+        id: "edit",
+        label: "i18n:govoplan-idm.edit.a5a0f3cc",
+        icon: <Edit3 size={16} aria-hidden="true" />,
+        disabled: !canManage || busy,
+        disabledReason: idmDisabledReason(false, busy, canManage),
+        onClick: () => editAssignment(row)
+      }]} />
     }
   ];
 
   return (
+    <PageScrollViewport>
     <div className="content-pad idm-page">
       <div className="page-heading split idm-heading">
         <div>
@@ -578,7 +625,14 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
           <p>i18n:govoplan-idm.identity_links_intro.45fed9dd</p>
         </div>
         <div className="idm-toolbar">
-          <Button type="button" onClick={() => void loadData()} disabled={loading || busy} title="i18n:govoplan-idm.reload.870ca3ec">
+          <DocumentationHelpLink reference={IDM_DOCUMENTATION} />
+          <Button
+            type="button"
+            onClick={() => requestDiscard(() => void loadData())}
+            disabled={loading || busy}
+            disabledReason={idmDisabledReason(loading, busy)}
+            title="i18n:govoplan-idm.reload.870ca3ec"
+          >
             <RefreshCw size={16} aria-hidden="true" /> i18n:govoplan-idm.reload.870ca3ec
           </Button>
         </div>
@@ -586,25 +640,53 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
 
       {error && <DismissibleAlert tone="danger" resetKey={error} floating>{error}</DismissibleAlert>}
       {success && !error && <DismissibleAlert tone="success" resetKey={success} floating>{success}</DismissibleAlert>}
-      {!canManage && <DismissibleAlert tone="warning" dismissible={false}>i18n:govoplan-idm.write_permission_required.c7dde7c6</DismissibleAlert>}
+      {!canManage && (
+        <ActionBlockerHint
+          reason={{
+            summary: IDM_INTERFACE_I18N.writeReason,
+            requiredAction: IDM_INTERFACE_I18N.permissionAction,
+            actor: IDM_INTERFACE_I18N.permissionActor,
+            target: IDM_INTERFACE_I18N.permissionDestination
+          }}
+          labels={{
+            requiredAction: IDM_INTERFACE_I18N.requiredAction,
+            actor: IDM_INTERFACE_I18N.actor,
+            target: IDM_INTERFACE_I18N.destination
+          }}
+          documentation={IDM_DOCUMENTATION}
+        />
+      )}
+      {!model.functions.length && !loading && (
+        <ActionBlockerHint
+          reason={{
+            summary: IDM_INTERFACE_I18N.noFunctions,
+            requiredAction: IDM_INTERFACE_I18N.functionAction,
+            actor: IDM_INTERFACE_I18N.functionActor,
+            target: IDM_INTERFACE_I18N.functionDestination
+          }}
+          labels={{
+            requiredAction: IDM_INTERFACE_I18N.requiredAction,
+            actor: IDM_INTERFACE_I18N.actor,
+            target: IDM_INTERFACE_I18N.destination
+          }}
+          documentation={IDM_DOCUMENTATION}
+        />
+      )}
 
       <LoadingFrame loading={loading || busy} label="i18n:govoplan-idm.loading_idm_assignments.0b1501bd">
         <div className="idm-table-stack">
           {canReadSettings && (
-              <Card title="i18n:govoplan-idm.idm_governance.6e4f3251" collapsible collapseKey="idm.governance">
-                <form className="idm-form-grid" onSubmit={(event) => { event.preventDefault(); void submitSettings(); }}>
+              <Card
+                title="i18n:govoplan-idm.idm_governance.6e4f3251"
+                collapsible
+                collapseKey="idm.governance"
+                actions={<DocumentationHelpLink reference={IDM_GOVERNANCE_DOCUMENTATION} />}
+              >
+                <form className="admin-form-grid two-columns" onSubmit={(event) => { event.preventDefault(); void submitSettings(); }}>
                 <div className="idm-check-list wide">
-                  <label>
-                    <input
-                      type="checkbox"
-                      checked={settingsDraft.require_assignment_change_requests}
-                      disabled={!canManageSettings || busy}
-                      onChange={(event) => setSettingsDraft({ ...settingsDraft, require_assignment_change_requests: event.target.checked })}
-                    />
-                    <span>i18n:govoplan-idm.require_assignment_change_requests.697718a1</span>
-                  </label>
+                  <ToggleSwitch label="i18n:govoplan-idm.require_assignment_change_requests.697718a1" checked={settingsDraft.require_assignment_change_requests} disabled={!canManageSettings || busy} help={idmDisabledReason(false, busy, canManageSettings)} onChange={(require_assignment_change_requests) => setSettingsDraft({ ...settingsDraft, require_assignment_change_requests })} />
                 </div>
-                <FormField label="i18n:govoplan-idm.audit_detail_level.eb2e6fd2">
+                <FormField label="i18n:govoplan-idm.audit_detail_level.eb2e6fd2" documentation={IDM_FIELD_DOCUMENTATION}>
                   <select
                     value={settingsDraft.audit_detail_level}
                     disabled={!canManageSettings || busy}
@@ -615,7 +697,7 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
                     <option value="full">i18n:govoplan-idm.full.7f021a14</option>
                   </select>
                 </FormField>
-                <FormField label="i18n:govoplan-idm.change_retention_days.4a91f7d3">
+                <FormField label="i18n:govoplan-idm.change_retention_days.4a91f7d3" documentation={IDM_FIELD_DOCUMENTATION}>
                   <input
                     type="number"
                     min="0"
@@ -624,8 +706,13 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
                     onChange={(event) => setSettingsDraft({ ...settingsDraft, change_retention_days: event.target.value })}
                   />
                 </FormField>
-                <div className="idm-form-actions wide">
-                  <Button type="submit" variant="primary" disabled={!canManageSettings || busy || !hasDirtySettingsDraft}>
+                <div className="button-row compact-actions wide">
+                  <Button
+                    type="submit"
+                    variant="primary"
+                    disabled={!canManageSettings || busy || !hasDirtySettingsDraft}
+                    disabledReason={idmDisabledReason(false, busy, canManageSettings) ?? (!hasDirtySettingsDraft ? IDM_INTERFACE_I18N.noChanges : undefined)}
+                  >
                     i18n:govoplan-idm.save_settings.4602c430
                   </Button>
                 </div>
@@ -633,7 +720,14 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
               </Card>
             )}
 
-          <Card title="i18n:govoplan-idm.assignments.a0d19ec5" collapsible collapseKey="idm.assignments" actions={<AdminIconButton label="i18n:govoplan-idm.add_assignment.08f2a0d5" icon={<Plus size={16} aria-hidden="true" />} variant="primary" disabled={!canManage || busy} onClick={openCreateAssignment} />}>
+          <FunctionAssignmentChangesPanel
+            settings={settings}
+            auth={auth}
+            model={model}
+            identities={identityOptions}
+          />
+
+          <Card title="i18n:govoplan-idm.assignments.a0d19ec5" collapsible collapseKey="idm.assignments" actions={<AdminIconButton label="i18n:govoplan-idm.add_assignment.08f2a0d5" icon={<Plus size={16} aria-hidden="true" />} variant="primary" disabled={!canManage || busy || !model.functions.length} disabledReason={idmDisabledReason(false, busy, canManage) ?? (!model.functions.length ? IDM_INTERFACE_I18N.noFunctions : undefined)} onClick={openCreateAssignment} />}>
             <DataGrid
               id="idm-organization-function-assignments"
               rows={assignments}
@@ -648,6 +742,7 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
       </LoadingFrame>
       {renderAssignmentDialog()}
     </div>
+    </PageScrollViewport>
   );
 
   function renderAssignmentDialog() {
@@ -656,20 +751,26 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
       <Dialog
         open={assignmentEditorOpen}
         title={editingAssignmentId ? "i18n:govoplan-idm.update_assignment.e20f52aa" : "i18n:govoplan-idm.add_assignment.08f2a0d5"}
-        onClose={() => !busy && discardAssignmentDraft()}
+        onClose={closeAssignmentEditor}
         closeDisabled={busy}
         className="admin-dialog admin-dialog-wide idm-editor-dialog"
         footer={(
           <>
-            <Button type="button" onClick={discardAssignmentDraft} disabled={busy}>i18n:govoplan-idm.cancel_edit.ea4781e0</Button>
-            <Button type="submit" form={formId} variant="primary" disabled={!canManage || busy || !assignmentDraft.identity_id || !assignmentDraft.function_id}>
+            <Button type="button" onClick={closeAssignmentEditor} disabled={busy} disabledReason={idmDisabledReason(false, busy)}>i18n:govoplan-idm.cancel_edit.ea4781e0</Button>
+            <Button
+              type="submit"
+              form={formId}
+              variant="primary"
+              disabled={!canManage || busy || !assignmentDraft.identity_id || !assignmentDraft.function_id || (selectedFunctionIsGoverned && !assignmentDraft.governance_override_reason.trim())}
+              disabledReason={idmDisabledReason(false, busy, canManage) ?? ((!assignmentDraft.identity_id || !assignmentDraft.function_id || (selectedFunctionIsGoverned && !assignmentDraft.governance_override_reason.trim())) ? IDM_INTERFACE_I18N.incomplete : undefined)}
+            >
               {editingAssignmentId ? "i18n:govoplan-idm.update_assignment.e20f52aa" : "i18n:govoplan-idm.add_assignment.08f2a0d5"}
             </Button>
           </>
         )}
       >
-        <form id={formId} className="idm-form-grid" onSubmit={(event) => void submitAssignment(event)}>
-          <FormField label="i18n:govoplan-idm.identity_search.d3460fcf">
+        <form id={formId} className="admin-form-grid two-columns" onSubmit={(event) => void submitAssignment(event)}>
+          <FormField label="i18n:govoplan-idm.identity_search.d3460fcf" documentation={IDM_FIELD_DOCUMENTATION}>
             <input
               value={identitySearch}
               placeholder="i18n:govoplan-idm.search_identities.88a9ef15"
@@ -677,7 +778,7 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
               onChange={(event) => setIdentitySearch(event.target.value)}
             />
           </FormField>
-          <FormField label="i18n:govoplan-idm.select_identity.91d31615">
+          <FormField label="i18n:govoplan-idm.select_identity.91d31615" documentation={IDM_FIELD_DOCUMENTATION}>
             <select value={assignmentDraft.identity_id} disabled={!canManage || busy} onChange={(event) => onIdentityChange(event.target.value)}>
               <option value="">i18n:govoplan-idm.select_identity.91d31615</option>
               {identitySelectOptions.map((item) => (
@@ -685,25 +786,25 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
               ))}
             </select>
           </FormField>
-          <FormField label="i18n:govoplan-idm.account.2b2936f8">
+          <FormField label="i18n:govoplan-idm.account.2b2936f8" documentation={IDM_FIELD_DOCUMENTATION}>
             <select value={assignmentDraft.account_id} disabled={!canManage || busy} onChange={(event) => setAssignmentDraft({ ...assignmentDraft, account_id: event.target.value })}>
               <option value="">i18n:govoplan-idm.none.2baf5c66</option>
               {accountIds.map((accountId) => <option key={accountId} value={accountId}>{accountId}</option>)}
             </select>
           </FormField>
-          <FormField label="i18n:govoplan-idm.select_function.2bec86e0">
+          <FormField label="i18n:govoplan-idm.select_function.2bec86e0" documentation={IDM_FIELD_DOCUMENTATION}>
             <select value={assignmentDraft.function_id} disabled={!canManage || busy} onChange={(event) => setAssignmentDraft({ ...assignmentDraft, function_id: event.target.value })}>
               <option value="">i18n:govoplan-idm.select_function.2bec86e0</option>
               {model.functions.map((item) => <option key={item.id} value={item.id}>{functionLabel(item, unitById)}</option>)}
             </select>
           </FormField>
-          <FormField label="i18n:govoplan-idm.source.d15b50c9">
+          <FormField label="i18n:govoplan-idm.source.d15b50c9" documentation={IDM_FIELD_DOCUMENTATION}>
             <select value={assignmentDraft.source} disabled={!canManage || busy} onChange={(event) => onSourceChange(event.target.value)}>
               {SOURCE_OPTIONS.map((item) => <option key={item.value} value={item.value}>{item.label}</option>)}
             </select>
           </FormField>
           {(assignmentDraft.source === "delegated" || assignmentDraft.source === "acting_for") && (
-            <FormField label="i18n:govoplan-idm.delegated_from_assignment_id.20d4a548">
+            <FormField label="i18n:govoplan-idm.delegated_from_assignment_id.20d4a548" documentation={IDM_FIELD_DOCUMENTATION}>
               <select value={assignmentDraft.delegated_from_assignment_id} disabled={!canManage || busy} onChange={(event) => setAssignmentDraft({ ...assignmentDraft, delegated_from_assignment_id: event.target.value, acting_for_account_id: "" })}>
                 <option value="">i18n:govoplan-idm.none.2baf5c66</option>
                 {assignmentOptions.map((item) => (
@@ -714,7 +815,7 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
           )}
           {assignmentDraft.source === "acting_for" && (
             <>
-              <FormField label="i18n:govoplan-idm.acting_for_search.b7c526c7">
+              <FormField label="i18n:govoplan-idm.acting_for_search.b7c526c7" documentation={IDM_FIELD_DOCUMENTATION}>
                 <input
                   value={actingForSearch}
                   placeholder="i18n:govoplan-idm.search_identities.88a9ef15"
@@ -722,7 +823,7 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
                   onChange={(event) => setActingForSearch(event.target.value)}
                 />
               </FormField>
-              <FormField label="i18n:govoplan-idm.acting_for_account_id.5d7ade5b">
+              <FormField label="i18n:govoplan-idm.acting_for_account_id.5d7ade5b" documentation={IDM_FIELD_DOCUMENTATION}>
                 <select value={assignmentDraft.acting_for_account_id} disabled={!canManage || busy} onChange={(event) => setAssignmentDraft({ ...assignmentDraft, acting_for_account_id: event.target.value })}>
                   <option value="">i18n:govoplan-idm.select_account.982ee1ad</option>
                   {actingForAccountIds.map((accountId) => <option key={accountId} value={accountId}>{accountId}</option>)}
@@ -731,22 +832,57 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
             </>
           )}
           <div className="idm-check-list">
-            <label>
-              <input type="checkbox" checked={assignmentDraft.applies_to_subunits} disabled={!canManage || busy} onChange={(event) => setAssignmentDraft({ ...assignmentDraft, applies_to_subunits: event.target.checked })} />
-              <span>i18n:govoplan-idm.applies_to_subunits.2e31b50b</span>
-            </label>
-            <label>
-              <input type="checkbox" checked={assignmentDraft.is_active} disabled={!canManage || busy} onChange={(event) => setAssignmentDraft({ ...assignmentDraft, is_active: event.target.checked })} />
-              <span>i18n:govoplan-idm.active.7bd0e9f8</span>
-            </label>
+            <ToggleSwitch label="i18n:govoplan-idm.applies_to_subunits.2e31b50b" checked={assignmentDraft.applies_to_subunits} disabled={!canManage || busy} help={idmDisabledReason(false, busy, canManage)} onChange={(applies_to_subunits) => setAssignmentDraft({ ...assignmentDraft, applies_to_subunits })} />
+            <ToggleSwitch label="i18n:govoplan-idm.active.7bd0e9f8" checked={assignmentDraft.is_active} disabled={!canManage || busy} help={idmDisabledReason(false, busy, canManage)} onChange={(is_active) => setAssignmentDraft({ ...assignmentDraft, is_active })} />
           </div>
+          {selectedFunctionIsGoverned && (
+            <div className="wide idm-governance-override">
+              <DismissibleAlert tone="warning" dismissible={false}>
+                Direct changes to this governed function are emergency overrides. Use a request or grant above for the normal process.
+                <DocumentationHelpLink reference={IDM_GOVERNANCE_DOCUMENTATION} />
+              </DismissibleAlert>
+              <FormField label="Emergency override reason" documentation={IDM_FIELD_DOCUMENTATION}>
+                <textarea
+                  rows={3}
+                  value={assignmentDraft.governance_override_reason}
+                  onChange={(event) => setAssignmentDraft({ ...assignmentDraft, governance_override_reason: event.target.value })}
+                  disabled={!canManage || busy}
+                />
+              </FormField>
+              <FormField label="Override evidence references (one per line)" documentation={IDM_FIELD_DOCUMENTATION}>
+                <textarea
+                  rows={2}
+                  value={assignmentDraft.governance_override_evidence}
+                  onChange={(event) => setAssignmentDraft({ ...assignmentDraft, governance_override_evidence: event.target.value })}
+                  disabled={!canManage || busy}
+                />
+              </FormField>
+            </div>
+          )}
           <div className="wide idm-dialog-change-request">
-            <FormField label="i18n:govoplan-idm.change_request_id.b7d816db">
+            <FormField label="i18n:govoplan-idm.change_request_id.b7d816db" documentation={IDM_FIELD_DOCUMENTATION}>
               <input value={assignmentChangeRequestId} onChange={(event) => setAssignmentChangeRequestId(event.target.value)} placeholder="cfgreq-..." disabled={busy} />
             </FormField>
             <p className="idm-muted">i18n:govoplan-idm.change_request_id_help.cc7de508</p>
           </div>
-          {!identityLookupAvailable && <p className="idm-muted wide">i18n:govoplan-idm.identity_lookup_unavailable.b76f7714</p>}
+          {!identityLookupAvailable && (
+            <div className="wide">
+              <ActionBlockerHint
+                reason={{
+                  summary: "i18n:govoplan-idm.identity_lookup_unavailable.b76f7714",
+                  requiredAction: IDM_INTERFACE_I18N.permissionAction,
+                  actor: IDM_INTERFACE_I18N.permissionActor,
+                  target: IDM_INTERFACE_I18N.permissionDestination
+                }}
+                labels={{
+                  requiredAction: IDM_INTERFACE_I18N.requiredAction,
+                  actor: IDM_INTERFACE_I18N.actor,
+                  target: IDM_INTERFACE_I18N.destination
+                }}
+                documentation={IDM_DOCUMENTATION}
+              />
+            </div>
+          )}
           {identityLoading && <p className="idm-muted wide">i18n:govoplan-idm.loading_identities.f3b84693</p>}
           {actingForLoading && <p className="idm-muted wide">i18n:govoplan-idm.loading_acting_for_accounts.c9894b1e</p>}
           {!model.functions.length && <p className="idm-muted wide">i18n:govoplan-idm.no_functions_available.51ba08eb</p>}
@@ -755,3 +891,7 @@ export default function IdmPage({ settings, auth }: IdmPageProps) {
     );
   }
 }
+
+function draftKey(value: unknown): string {
+  return JSON.stringify(value);
+}

webui/src/features/interfacePatterns.ts

@@ -0,0 +1,48 @@
+import type { DocumentationHelpReference } from "@govoplan/core-webui";
+
+export const IDM_DOCUMENTATION = {
+  topicId: "idm.workflow.assign-function-to-identity",
+  documentationType: "user"
+} satisfies DocumentationHelpReference;
+
+export const IDM_GOVERNANCE_DOCUMENTATION = {
+  topicId: "idm.reference.assignment-governance",
+  documentationType: "admin"
+} satisfies DocumentationHelpReference;
+
+export const IDM_FIELD_DOCUMENTATION = {
+  topicId: "idm.reference.fields-and-consequences",
+  documentationType: "admin"
+} satisfies DocumentationHelpReference;
+
+export const IDM_INTERFACE_I18N = {
+  loading: "i18n:govoplan-idm.loading_reason",
+  busy: "i18n:govoplan-idm.busy_reason",
+  writeReason: "i18n:govoplan-idm.write_permission_required.c7dde7c6",
+  settingsReason: "i18n:govoplan-idm.settings_write_permission_required.37f37efa",
+  searchReason: "i18n:govoplan-idm.identity_search_permission_reason",
+  incomplete: "i18n:govoplan-idm.incomplete_draft_reason",
+  noChanges: "i18n:govoplan-idm.no_changes_reason",
+  noFunctions: "i18n:govoplan-idm.no_functions_available.51ba08eb",
+  requiredAction: "i18n:govoplan-idm.required_action",
+  actor: "i18n:govoplan-idm.responsible_actor",
+  destination: "i18n:govoplan-idm.destination",
+  permissionAction: "i18n:govoplan-idm.permission_required_action",
+  permissionActor: "i18n:govoplan-idm.permission_responsible_actor",
+  permissionDestination: "i18n:govoplan-idm.permission_destination",
+  functionAction: "i18n:govoplan-idm.function_required_action",
+  functionActor: "i18n:govoplan-idm.function_responsible_actor",
+  functionDestination: "i18n:govoplan-idm.function_destination"
+} as const;
+
+export function idmDisabledReason(
+  loading: boolean,
+  busy: boolean,
+  permitted = true
+): string | undefined {
+  if (loading) return IDM_INTERFACE_I18N.loading;
+  if (busy) return IDM_INTERFACE_I18N.busy;
+  if (!permitted) return IDM_INTERFACE_I18N.writeReason;
+  return undefined;
+}
+

webui/src/i18n/generatedTranslations.ts

@@ -62,7 +62,96 @@ export const generatedTranslations: PlatformTranslations = {
     "i18n:govoplan-idm.unit.a94c2fbd": "Unit",
     "i18n:govoplan-idm.update_assignment.e20f52aa": "Update assignment",
     "i18n:govoplan-idm.view_assignments.2d40d6a5": "View assignments",
-    "i18n:govoplan-idm.write_permission_required.c7dde7c6": "You do not have permission to manage IDM organization assignments."
+    "i18n:govoplan-idm.write_permission_required.c7dde7c6": "You do not have permission to manage IDM organization assignments.",
+    "i18n:govoplan-idm.loading_reason": "IDM data is still loading.",
+    "i18n:govoplan-idm.busy_reason": "Another IDM action is still running.",
+    "i18n:govoplan-idm.identity_search_permission_reason": "Your account may not search identity candidates.",
+    "i18n:govoplan-idm.incomplete_draft_reason": "Complete all required fields before submitting.",
+    "i18n:govoplan-idm.no_changes_reason": "There are no settings changes to save.",
+    "i18n:govoplan-idm.required_action": "Required action",
+    "i18n:govoplan-idm.responsible_actor": "Responsible actor",
+    "i18n:govoplan-idm.destination": "Destination",
+    "i18n:govoplan-idm.permission_required_action": "Ask for the corresponding IDM management permission.",
+    "i18n:govoplan-idm.permission_responsible_actor": "An Access or tenant administrator",
+    "i18n:govoplan-idm.permission_destination": "Access role assignments",
+    "i18n:govoplan-idm.function_required_action": "Create or activate an organization function first.",
+    "i18n:govoplan-idm.function_responsible_actor": "An organization administrator",
+    "i18n:govoplan-idm.function_destination": "Organizations",
+    "i18n:govoplan-idm.confirm_function_action": "{action} the governed change for {function}? The decision and actor are retained as evidence.",
+    "i18n:govoplan-idm.function_request_title": "Function request: {function}",
+    "i18n:govoplan-idm.function_grant_title": "Function grant: {function}",
+    "i18n:govoplan-idm.action_approve": "Approve",
+    "i18n:govoplan-idm.action_reject": "Reject",
+    "i18n:govoplan-idm.action_accept": "Accept",
+    "i18n:govoplan-idm.action_request_changes": "Request changes",
+    "i18n:govoplan-idm.action_respond": "Respond",
+    "i18n:govoplan-idm.action_withdraw": "Withdraw",
+    "i18n:govoplan-idm.action_recheck": "Recheck",
+    "i18n:govoplan-idm.kind_request": "Request",
+    "i18n:govoplan-idm.kind_grant": "Grant",
+    "i18n:govoplan-idm.state_submitted": "Submitted",
+    "i18n:govoplan-idm.state_awaiting_holder": "Awaiting holder",
+    "i18n:govoplan-idm.state_awaiting_authority": "Awaiting authority",
+    "i18n:govoplan-idm.state_awaiting_recipient": "Awaiting recipient",
+    "i18n:govoplan-idm.state_changes_requested": "Changes requested",
+    "i18n:govoplan-idm.state_applied": "Applied",
+    "i18n:govoplan-idm.state_rejected": "Rejected",
+    "i18n:govoplan-idm.state_expired": "Expired",
+    "i18n:govoplan-idm.state_withdrawn": "Withdrawn",
+    "i18n:govoplan-idm.state_cancelled": "Cancelled",
+    "i18n:govoplan-idm.state_blocked": "Blocked",
+    "i18n:govoplan-idm.state_failed_manual_review": "Manual review failed",
+    "i18n:govoplan-idm.step_approve_holder": "Holder approval",
+    "i18n:govoplan-idm.step_approve_authority": "Authority approval",
+    "i18n:govoplan-idm.step_accept_recipient": "Recipient acceptance",
+    "i18n:govoplan-idm.profile_holder_review": "Holder review",
+    "i18n:govoplan-idm.profile_authority_review": "Authority review",
+    "i18n:govoplan-idm.profile_recipient_review": "Recipient review",
+    "Actions": "Actions",
+    "Direct changes to this governed function require an emergency override reason.": "Direct changes to this governed function require an emergency override reason.",
+    "Direct changes to this governed function are emergency overrides. Use a request or grant above for the normal process.": "Direct changes to this governed function are emergency overrides. Use a request or grant above for the normal process.",
+    "Emergency override reason": "Emergency override reason",
+    "Override evidence references (one per line)": "Override evidence references (one per line)",
+    "Unsaved function change": "Unsaved function change",
+    "Save or discard the function request or grant before leaving this surface.": "Save or discard the function request or grant before leaving this surface.",
+    "Kind": "Kind",
+    "Function": "Function",
+    "Candidate": "Candidate",
+    "State": "State",
+    "Decisions": "Decisions",
+    "Updated": "Updated",
+    "Open change": "Open change",
+    "Function requests and grants": "Function requests and grants",
+    "Start governed change": "Start governed change",
+    "Loading governed function changes": "Loading governed function changes",
+    "No governed function changes": "No governed function changes",
+    "Start governed function change": "Start governed function change",
+    "Cancel": "Cancel",
+    "Submit": "Submit",
+    "Function change kind": "Function change kind",
+    "Request function": "Request function",
+    "Grant function": "Grant function",
+    "Select function": "Select function",
+    "Candidate identity": "Candidate identity",
+    "Select identity": "Select identity",
+    "Candidate account": "Candidate account",
+    "No linked account": "No linked account",
+    "Valid from": "Valid from",
+    "Valid until": "Valid until",
+    "Justification": "Justification",
+    "Evidence references (one per line)": "Evidence references (one per line)",
+    "Function change": "Function change",
+    "Close": "Close",
+    "Profile": "Profile",
+    "Workflow revision": "Workflow revision",
+    "Required decisions": "Required decisions",
+    "Completed decisions": "Completed decisions",
+    "Explanation": "Explanation",
+    "Decision comment": "Decision comment",
+    "History": "History",
+    "Confirm function decision": "Confirm function decision",
+    "Confirm": "Confirm",
+    "None": "None"
   },
   de: {
     "i18n:govoplan-idm.account.2b2936f8": "Konto",
@@ -125,6 +214,95 @@ export const generatedTranslations: PlatformTranslations = {
     "i18n:govoplan-idm.unit.a94c2fbd": "Einheit",
     "i18n:govoplan-idm.update_assignment.e20f52aa": "Zuordnung aktualisieren",
     "i18n:govoplan-idm.view_assignments.2d40d6a5": "Zuordnungen anzeigen",
-    "i18n:govoplan-idm.write_permission_required.c7dde7c6": "Du hast keine Berechtigung, IDM-Organisationszuordnungen zu verwalten."
+    "i18n:govoplan-idm.write_permission_required.c7dde7c6": "Du hast keine Berechtigung, IDM-Organisationszuordnungen zu verwalten.",
+    "i18n:govoplan-idm.loading_reason": "IDM-Daten werden noch geladen.",
+    "i18n:govoplan-idm.busy_reason": "Eine andere IDM-Aktion läuft noch.",
+    "i18n:govoplan-idm.identity_search_permission_reason": "Ihr Konto darf keine Identitätskandidaten suchen.",
+    "i18n:govoplan-idm.incomplete_draft_reason": "Füllen Sie vor dem Absenden alle Pflichtfelder aus.",
+    "i18n:govoplan-idm.no_changes_reason": "Es gibt keine Einstellungsänderungen zu speichern.",
+    "i18n:govoplan-idm.required_action": "Erforderliche Aktion",
+    "i18n:govoplan-idm.responsible_actor": "Verantwortliche Stelle",
+    "i18n:govoplan-idm.destination": "Ziel",
+    "i18n:govoplan-idm.permission_required_action": "Fordern Sie die entsprechende IDM-Verwaltungsberechtigung an.",
+    "i18n:govoplan-idm.permission_responsible_actor": "Access- oder Mandantenadministration",
+    "i18n:govoplan-idm.permission_destination": "Access-Rollenzuordnungen",
+    "i18n:govoplan-idm.function_required_action": "Erstellen oder aktivieren Sie zuerst eine Organisationsfunktion.",
+    "i18n:govoplan-idm.function_responsible_actor": "Organisationsadministration",
+    "i18n:govoplan-idm.function_destination": "Organisationen",
+    "i18n:govoplan-idm.confirm_function_action": "{action} der gesteuerten Änderung für {function}? Entscheidung und handelnde Person werden als Nachweis aufbewahrt.",
+    "i18n:govoplan-idm.function_request_title": "Funktionsantrag: {function}",
+    "i18n:govoplan-idm.function_grant_title": "Funktionsvergabe: {function}",
+    "i18n:govoplan-idm.action_approve": "Genehmigen",
+    "i18n:govoplan-idm.action_reject": "Ablehnen",
+    "i18n:govoplan-idm.action_accept": "Annehmen",
+    "i18n:govoplan-idm.action_request_changes": "Änderungen anfordern",
+    "i18n:govoplan-idm.action_respond": "Antworten",
+    "i18n:govoplan-idm.action_withdraw": "Zurückziehen",
+    "i18n:govoplan-idm.action_recheck": "Erneut prüfen",
+    "i18n:govoplan-idm.kind_request": "Antrag",
+    "i18n:govoplan-idm.kind_grant": "Vergabe",
+    "i18n:govoplan-idm.state_submitted": "Eingereicht",
+    "i18n:govoplan-idm.state_awaiting_holder": "Wartet auf Funktionsinhaber",
+    "i18n:govoplan-idm.state_awaiting_authority": "Wartet auf zuständige Stelle",
+    "i18n:govoplan-idm.state_awaiting_recipient": "Wartet auf Empfänger",
+    "i18n:govoplan-idm.state_changes_requested": "Änderungen angefordert",
+    "i18n:govoplan-idm.state_applied": "Angewendet",
+    "i18n:govoplan-idm.state_rejected": "Abgelehnt",
+    "i18n:govoplan-idm.state_expired": "Abgelaufen",
+    "i18n:govoplan-idm.state_withdrawn": "Zurückgezogen",
+    "i18n:govoplan-idm.state_cancelled": "Abgebrochen",
+    "i18n:govoplan-idm.state_blocked": "Blockiert",
+    "i18n:govoplan-idm.state_failed_manual_review": "Manuelle Prüfung fehlgeschlagen",
+    "i18n:govoplan-idm.step_approve_holder": "Genehmigung durch Funktionsinhaber",
+    "i18n:govoplan-idm.step_approve_authority": "Genehmigung durch zuständige Stelle",
+    "i18n:govoplan-idm.step_accept_recipient": "Annahme durch Empfänger",
+    "i18n:govoplan-idm.profile_holder_review": "Prüfung durch Funktionsinhaber",
+    "i18n:govoplan-idm.profile_authority_review": "Prüfung durch zuständige Stelle",
+    "i18n:govoplan-idm.profile_recipient_review": "Prüfung durch Empfänger",
+    "Actions": "Aktionen",
+    "Direct changes to this governed function require an emergency override reason.": "Direkte Änderungen an dieser gesteuerten Funktion erfordern eine Begründung für die Notfallübersteuerung.",
+    "Direct changes to this governed function are emergency overrides. Use a request or grant above for the normal process.": "Direkte Änderungen an dieser gesteuerten Funktion sind Notfallübersteuerungen. Verwenden Sie für den regulären Prozess einen Antrag oder eine Vergabe.",
+    "Emergency override reason": "Begründung der Notfallübersteuerung",
+    "Override evidence references (one per line)": "Nachweisreferenzen der Übersteuerung (eine pro Zeile)",
+    "Unsaved function change": "Ungespeicherte Funktionsänderung",
+    "Save or discard the function request or grant before leaving this surface.": "Speichern oder verwerfen Sie den Funktionsantrag oder die Vergabe, bevor Sie diesen Bereich verlassen.",
+    "Kind": "Art",
+    "Function": "Funktion",
+    "Candidate": "Kandidat",
+    "State": "Status",
+    "Decisions": "Entscheidungen",
+    "Updated": "Aktualisiert",
+    "Open change": "Änderung öffnen",
+    "Function requests and grants": "Funktionsanträge und -vergaben",
+    "Start governed change": "Gesteuerte Änderung starten",
+    "Loading governed function changes": "Gesteuerte Funktionsänderungen werden geladen",
+    "No governed function changes": "Keine gesteuerten Funktionsänderungen",
+    "Start governed function change": "Gesteuerte Funktionsänderung starten",
+    "Cancel": "Abbrechen",
+    "Submit": "Absenden",
+    "Function change kind": "Art der Funktionsänderung",
+    "Request function": "Funktion beantragen",
+    "Grant function": "Funktion vergeben",
+    "Select function": "Funktion auswählen",
+    "Candidate identity": "Kandidatenidentität",
+    "Select identity": "Identität auswählen",
+    "Candidate account": "Kandidatenkonto",
+    "No linked account": "Kein verknüpftes Konto",
+    "Valid from": "Gültig ab",
+    "Valid until": "Gültig bis",
+    "Justification": "Begründung",
+    "Evidence references (one per line)": "Nachweisreferenzen (eine pro Zeile)",
+    "Function change": "Funktionsänderung",
+    "Close": "Schließen",
+    "Profile": "Profil",
+    "Workflow revision": "Workflow-Revision",
+    "Required decisions": "Erforderliche Entscheidungen",
+    "Completed decisions": "Abgeschlossene Entscheidungen",
+    "Explanation": "Erläuterung",
+    "Decision comment": "Entscheidungskommentar",
+    "History": "Verlauf",
+    "Confirm function decision": "Funktionsentscheidung bestätigen",
+    "Confirm": "Bestätigen",
+    "None": "Keine"
   }
 };

webui/src/module.ts

@@ -1,5 +1,6 @@
 import { createElement, lazy } from "react";
-import { Button, type OrganizationFunctionActionsUiCapability, type PlatformWebModule } from "@govoplan/core-webui";
+import { Users } from "lucide-react";
+import type { OrganizationFunctionActionsUiCapability, PlatformWebModule } from "@govoplan/core-webui";
 import { generatedTranslations } from "./i18n/generatedTranslations";
 import "./styles/idm.css";
 
@@ -20,23 +21,16 @@ const organizationFunctionActions: OrganizationFunctionActionsUiCapability = {
   actions: [
     {
       id: "idm.view-function-assignments",
-      label: "i18n:govoplan-idm.assignments.a0d19ec5",
+      surfaceId: "idm.action.view-function-assignments",
+      label: "i18n:govoplan-idm.view_assignments.2d40d6a5",
+      icon: createElement(Users, { size: 16 }),
       anyOf: idmReadScopes,
       order: 40,
-      render: ({ function: item }) => createElement(
-        Button,
-        {
-          type: "button",
-          variant: "ghost",
-          title: "i18n:govoplan-idm.view_assignments.2d40d6a5",
-          onClick: () => {
-            if (typeof window !== "undefined") {
-              window.location.href = `/idm?function_id=${encodeURIComponent(item.id)}`;
-            }
-          }
-        },
-        "i18n:govoplan-idm.assignments.a0d19ec5"
-      )
+      onClick: ({ function: item }) => {
+        if (typeof window !== "undefined") {
+          window.location.href = `/idm?function_id=${encodeURIComponent(item.id)}`;
+        }
+      }
     }
   ]
 };
@@ -44,9 +38,18 @@ const organizationFunctionActions: OrganizationFunctionActionsUiCapability = {
 export const idmModule: PlatformWebModule = {
   id: "idm",
   label: "i18n:govoplan-idm.idm.61f4a7a2",
-  version: "0.1.6",
+  version: "0.1.8",
   dependencies: ["identity", "organizations"],
   translations,
+  viewSurfaces: [
+    {
+      id: "idm.action.view-function-assignments",
+      moduleId: "idm",
+      kind: "action",
+      label: "i18n:govoplan-idm.view_assignments.2d40d6a5",
+      order: 40
+    }
+  ],
   navItems: [
     {
       to: "/idm",

webui/src/styles/idm.css

@@ -2,7 +2,6 @@
   display: grid;
   gap: 18px;
   width: 100%;
-  max-width: 1480px;
 }
 
 .idm-heading {
@@ -27,16 +26,6 @@
   width: 100%;
 }
 
-.idm-form-grid {
-  display: grid;
-  grid-template-columns: repeat(2, minmax(0, 1fr));
-  gap: 14px;
-}
-
-.idm-form-grid .wide {
-  grid-column: 1 / -1;
-}
-
 .idm-check-list {
   display: grid;
   gap: 10px;
@@ -51,18 +40,6 @@
   font-weight: 600;
 }
 
-.idm-form-actions,
-.idm-row-actions {
-  display: flex;
-  align-items: center;
-  gap: 6px;
-  flex-wrap: nowrap;
-}
-
-.idm-row-actions {
-  justify-content: flex-end;
-}
-
 .idm-identity {
   display: grid;
   gap: 2px;
@@ -89,8 +66,86 @@
   padding-top: 2px;
 }
 
-@media (max-width: 900px) {
-  .idm-form-grid {
+.idm-governance-override {
+  display: grid;
+  gap: 12px;
+}
+
+.idm-change-detail {
+  display: grid;
+  gap: 18px;
+}
+
+.idm-change-summary {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 12px 18px;
+  margin: 0;
+}
+
+.idm-change-summary > div {
+  display: grid;
+  gap: 4px;
+  min-width: 0;
+}
+
+.idm-change-summary > .wide {
+  grid-column: 1 / -1;
+}
+
+.idm-change-summary dt {
+  color: var(--muted);
+  font-size: 12px;
+  font-weight: 700;
+  text-transform: uppercase;
+}
+
+.idm-change-summary dd {
+  margin: 0;
+  overflow-wrap: anywhere;
+}
+
+.idm-change-actions {
+  display: grid;
+  gap: 10px;
+  padding-block: 14px;
+  border-block: 1px solid var(--border);
+}
+
+.idm-change-history {
+  display: grid;
+  gap: 8px;
+  margin: 0;
+  padding: 0;
+  list-style: none;
+  max-height: 260px;
+  overflow: auto;
+}
+
+.idm-change-history li {
+  display: grid;
+  grid-template-columns: minmax(120px, 0.6fr) minmax(150px, 0.7fr) minmax(180px, 1fr);
+  gap: 10px;
+  padding: 10px 0;
+  border-bottom: 1px solid var(--border);
+}
+
+.idm-change-history p {
+  grid-column: 1 / -1;
+  margin: 0;
+  color: var(--muted);
+}
+
+@media (max-width: 760px) {
+  .idm-change-summary {
+    grid-template-columns: 1fr;
+  }
+
+  .idm-change-summary > .wide {
+    grid-column: auto;
+  }
+
+  .idm-change-history li {
     grid-template-columns: 1fr;
   }
 }