Merge pull request 'test(e2e): serve the portal + walking-skeleton Playwright e2e (closes #68)' (#72) from feat/68-e2e into main

Reviewed-on: #72

.config/dotnet-tools.json

@@ -8,6 +8,13 @@
         "dotnet-stryker"
       ],
       "rollForward": false
+    },
+    "dotnet-ef": {
+      "version": "10.0.0",
+      "commands": [
+        "dotnet-ef"
+      ],
+      "rollForward": false
     }
   }
 }

.editorconfig

@@ -0,0 +1,17 @@
+# Editor configuration, see http://editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+# .NET sources use 4-space indent (dotnet format enforces this). The 2-space default
+# above is for the frontend (TS/HTML/CSS/JSON); C# keeps the .NET convention.
+[*.cs]
+indent_size = 4
+
+[*.md]
+max_line_length = off
+trim_trailing_whitespace = false

.gitea/workflows/ci.yaml

@@ -43,6 +43,20 @@ jobs:
           dotnet-version: '10.0.x'
       - run: make unit
 
+  # Frontend (Nx/Angular) lane: install with pnpm, then Nx lint + test + build.
+  frontend:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: https://github.com/actions/checkout@v4
+      - uses: https://github.com/pnpm/action-setup@v4
+        with:
+          version: 11
+      - uses: https://github.com/actions/setup-node@v4
+        with:
+          node-version: '24'
+          cache: 'pnpm'
+      - run: make frontend
+
   mutation:
     runs-on: ubuntu-latest
     steps:
@@ -51,17 +65,41 @@ jobs:
         with:
           dotnet-version: '10.0.x'
       - run: make mutation
-      # Publish the Stryker HTML report. `if: always()` uploads it even when the
+      # Publish the Stryker HTML reports. `if: always()` uploads them even when the
       # ratchet fails — that is exactly when you want to inspect the survivors.
-      # Glob handles Stryker's non-deterministic StrykerOutput/<timestamp>/ dir.
-      # Pinned to @v3 deliberately: @v4 refuses to run on Gitea (GHES guard) —
-      # see docs/runbooks/gitea-actions-gotchas.md §4.
+      # `continue-on-error` keeps the upload best-effort: the mutation *gate* is the
+      # ratchet (make mutation's exit code), not the report, so a Gitea artifact-backend
+      # 500 must not fail the job (gitea-actions-gotchas.md §4). Glob handles Stryker's
+      # non-deterministic StrykerOutput/<timestamp>/ dir. Pinned @v3: @v4's bundled
+      # @actions/artifact hard-aborts on non-github.com (GHES guard) — see the runbook.
       - uses: https://github.com/actions/upload-artifact@v3
         if: always()
+        continue-on-error: true
         with:
           name: acl-mutation-report
           path: services/acl/StrykerOutput/**/reports/mutation-report.html
           if-no-files-found: warn
+      - uses: https://github.com/actions/upload-artifact@v3
+        if: always()
+        continue-on-error: true
+        with:
+          name: event-subscriber-mutation-report
+          path: services/event-subscriber/StrykerOutput/**/reports/mutation-report.html
+          if-no-files-found: warn
+      - uses: https://github.com/actions/upload-artifact@v3
+        if: always()
+        continue-on-error: true
+        with:
+          name: domain-mutation-report
+          path: services/domain/StrykerOutput/**/reports/mutation-report.html
+          if-no-files-found: warn
+      - uses: https://github.com/actions/upload-artifact@v3
+        if: always()
+        continue-on-error: true
+        with:
+          name: bff-mutation-report
+          path: services/bff/StrykerOutput/**/reports/mutation-report.html
+          if-no-files-found: warn
 
   # One stage for every check that needs the live stack. On the single self-hosted
   # runner jobs run sequentially, so booting OpenZaak once (instead of once per job)
@@ -80,10 +118,18 @@ jobs:
         run: make verify-acl
       - name: OpenZaak → NRC notification delivery
         run: make verify-nrc
+      - name: OpenZaak → NRC → Event Subscriber → projection-api
+        run: make verify-projection
+      - name: Domain → Flowable → ACL → OpenZaak
+        run: make verify-domain
+      - name: BFF → Keycloak + domain + projection
+        run: make verify-bff
+      - name: Self-service e2e (Playwright, login → submit → success)
+        run: make verify-e2e
       # Log dump must precede teardown (which removes the containers).
       - name: Dump container logs on failure
         if: failure()
-        run: docker compose -f infra/docker-compose.yml logs --no-color --tail=100 oz-init openzaak nrc-init nrc-web nrc-celery nrc-beat flowable-init keycloak acl bff 2>&1 || true
+        run: docker compose -f infra/docker-compose.yml logs --no-color --tail=100 oz-init openzaak nrc-init nrc-web nrc-celery nrc-beat flowable-db flowable-rest flowable-init keycloak acl bff domain projection-db event-subscriber projection-api self-service 2>&1 || true
       - name: Tear down
         if: always()
         run: make down

.gitignore

@@ -35,3 +35,25 @@ site/
 # OS
 .DS_Store
 Thumbs.db
+
+# ── Frontend (Nx / Angular / pnpm) ──
+node_modules/
+dist/
+tmp/
+out-tsc/
+/coverage
+.angular/
+.nx/cache
+.nx/workspace-data
+.nx/self-healing
+.nx/migrate-runs
+.nx/polygraph
+vite.config.*.timestamp*
+vitest.config.*.timestamp*
+
+.angular
+
+# Playwright e2e (installed/generated in-container or on local runs)
+tests/e2e/node_modules/
+tests/e2e/test-results/
+tests/e2e/playwright-report/

.prettierignore

@@ -0,0 +1,8 @@
+# Add files here to ignore them from prettier formatting
+/dist
+/coverage
+/.nx/cache
+/.nx/workspace-data
+.angular
+
+.nx/self-healing

.prettierrc

@@ -0,0 +1,3 @@
+{
+  "singleQuote": true
+}

BACKLOG.md

@@ -151,17 +151,16 @@ The skeleton proves the spine end-to-end: a registration, a workflow, a zaak in
 
 ### S-08 · Self-Service portal (Angular, NL DS) — submit a registration
 
-**Outcome:** The self-service Angular app, in the Nx monorepo, lets a zorgprofessional log in via mock DigiD and submit a registration. NL Design System styling. Generated API client.
+> **S-08 was split** (CLAUDE.md §13; issue #9 closed) into the sub-slices below — it bundled the
+> Nx bootstrap, the generated client, the NL DS + DigiD form, and a full-stack Playwright e2e, well
+> past 1–2 days. Each sub-slice is independently demoable and CI-green.
 
-**Acceptance:**
+- **S-08a (#65)** · Nx monorepo + Angular tooling + CI Node lane. Placeholder `self-service` app; `nx lint/test/build` green in a new CI Node lane.
+- **S-08b (#66)** · Generated api-client lib from `services/bff/openapi.json` (never hand-written, §10) + a mocked-BFF unit test.
+- **S-08c (#67)** · Self-service submit form — NL Design System `libs/ui`, DigiD OIDC `libs/auth`, component tests (Angular Testing Library), axe WCAG 2.1 AA on the submit page.
+- **S-08d (#68)** · Playwright happy-path e2e (login → submit → success) against the full stack + compose serving + CI e2e lane.
 
-- E2E test (Playwright): full happy path, login → submit → success page.
-- Component tests (Testing Library) for the form.
-- Accessibility audit (axe-core) passes WCAG 2.1 AA on the submit page.
-
-**Touches:** `apps/self-service/`, `libs/ui/`, `libs/auth/`, `libs/api-client/`, tests.
-
-**Out of scope:** document upload, status tracking page.
+**Out of scope (whole of S-08):** document upload, status tracking page.
 
 ### S-09 · Openbaar Register portal — public lookup
 

Makefile

@@ -10,7 +10,7 @@ COMPOSE    := infra/docker-compose.yml
 # Long-running services with a healthcheck — the smoke polls these for readiness
 # (infra/wait-healthy.sh). One-shot init jobs (oz-init, nrc-init, flowable-init)
 # are not polled; they only need to have run. See docs/runbooks/gitea-actions-gotchas.md.
-WAIT_SVCS  := openzaak nrc-web acl bff
+WAIT_SVCS  := openzaak nrc-web acl bff domain event-subscriber projection-api self-service
 # Config files (OpenZaak data.yaml, Keycloak realms, Flowable BPMN) are streamed
 # into external named volumes via `docker cp` (infra/seed-config.sh) instead of
 # bind-mounted, because bind mounts don't reach sibling containers on the
@@ -43,11 +43,23 @@ export DOCKER_HOST := unix://$(PODMAN_SOCK)
 endif
 endif
 
-.PHONY: ci lint build unit mutation integration verify verify-up verify-acl verify-nrc verify-notifications smoke up down local local-down changelog openzaak-up openzaak-smoke openzaak-seed openzaak-down stack-up stack-smoke stack-down keycloak-up keycloak-smoke keycloak-down flowable-up flowable-smoke flowable-down help
+.PHONY: ci lint build unit mutation frontend integration verify verify-up verify-acl verify-nrc verify-projection verify-bff verify-domain verify-notifications smoke up down local local-down changelog openzaak-up openzaak-smoke openzaak-seed openzaak-down stack-up stack-smoke stack-down keycloak-up keycloak-smoke keycloak-down flowable-up flowable-smoke flowable-down help
 
-## ci: run the full pipeline — lint, build, unit, mutation, verify (mirrors Gitea Actions)
+## ci: run the full pipeline — lint, build, unit, mutation, frontend, verify (mirrors Gitea Actions)
 ## `verify` is the live-stack stage (full stack up once → ACL + notification checks).
-ci: lint build unit mutation verify
+ci: lint build unit mutation frontend verify
+
+## frontend: install deps and run the Nx lint/test/build for the portals (pnpm + Node required)
+# Tests run in their own phase, ahead of the build. The @angular/build:unit-test
+# (Vitest) runner spawns a worker with a hard-coded 60s/90s startup timeout that is
+# not configurable. When the ~5min production build shares the run-many pool, it
+# starves that worker of CPU on constrained CI runners and Vitest fails with
+# "Timeout waiting for worker to respond". Splitting the phases keeps tests off the
+# heavy build's back so the worker starts well inside its window.
+frontend:
+	pnpm install --frozen-lockfile
+	pnpm nx run-many -t lint test
+	pnpm nx run-many -t build
 
 ## lint: verify formatting (no changes)
 lint:
@@ -61,14 +73,17 @@ build:
 unit:
 	dotnet test $(SLN) -c Release --filter "Category!=Integration"
 
-## mutation: run the Stryker.NET ratchet on the ACL (fails below the recorded baseline)
+## mutation: run the Stryker.NET ratchet on each service with branching logic (fails below baseline)
 # Stryker is pinned as a local dotnet tool (.config/dotnet-tools.json); `tool restore`
-# makes `make mutation` work from a fresh clone. Config + break threshold (the ratchet,
-# CLAUDE.md §5) live in services/acl/stryker-config.json. The ACL is the first service
-# with branching logic, so it sets the repo-wide baseline; later slices ratchet it up.
+# makes `make mutation` work from a fresh clone. Each service owns its config + break
+# threshold (the ratchet, CLAUDE.md §5): each services/<svc>/stryker-config.json.
+# Scores never regress below baseline.
 mutation:
 	dotnet tool restore
 	cd services/acl && dotnet stryker
+	cd services/event-subscriber && dotnet stryker
+	cd services/domain && dotnet stryker
+	cd services/bff && dotnet stryker
 
 ## smoke: seed config, bring the whole stack up, wait for health-checked services, tear down
 # SEED populates the external config volumes first (upstream images used verbatim;
@@ -130,7 +145,27 @@ verify-acl:
 verify-nrc:
 	bash infra/run-notification-check.sh
 
-## verify: local mirror of the CI verify-stack job — full stack up once, both checks,
+## verify-projection: OpenZaak → NRC → Event Subscriber → projection-api end-to-end (S-06),
+## against the already-running stack.
+verify-projection:
+	bash infra/run-projection-check.sh
+
+## verify-domain: domain → Flowable → ACL → OpenZaak end-to-end (S-05), against the
+## already-running stack. Recreates the acl service to inject the seeded zaaktype URL.
+verify-domain:
+	bash infra/run-domain-check.sh
+
+## verify-bff: BFF end-to-end (S-07) against the up stack — token validation on self-service
+## + anonymous public-safe openbaar register (ADR-0010).
+verify-bff:
+	bash infra/run-bff-check.sh
+
+## verify-e2e: walking-skeleton Playwright e2e (S-08d) against the up stack — DigiD login →
+## submit → confirmation, driven inside the compose network.
+verify-e2e:
+	bash infra/run-e2e-check.sh
+
+## verify: local mirror of the CI verify-stack job — full stack up once, all checks,
 ## tear down (always). For fast single-concern local iteration use `integration`
 ## (oz-only) or `verify-notifications` (oz+nrc) instead.
 verify:
@@ -139,7 +174,11 @@ verify:
 	@bash -c 'set -e; rc=0; \
 	  WAIT_TIMEOUT=420 bash infra/wait-healthy.sh $(WAIT_SVCS) \
 	    && bash infra/run-acl-integration.sh \
-	    && bash infra/run-notification-check.sh || rc=$$?; \
+	    && bash infra/run-notification-check.sh \
+	    && bash infra/run-projection-check.sh \
+	    && bash infra/run-domain-check.sh \
+	    && bash infra/run-bff-check.sh \
+	    && bash infra/run-e2e-check.sh || rc=$$?; \
 	  docker compose -f $(COMPOSE) down --volumes >/dev/null 2>&1; \
 	  docker volume rm -f $(CFG_VOLS) >/dev/null 2>&1; \
 	  exit $$rc'

apps/self-service/Dockerfile

@@ -0,0 +1,23 @@
+# Multi-stage build for the self-service portal (Angular → nginx).
+# Build context is the repo root (the app needs the pnpm workspace + libs). See infra/docker-compose.yml.
+FROM node:24-slim AS build
+WORKDIR /src
+RUN corepack enable && corepack prepare pnpm@11.5.2 --activate
+
+# Restore first (cached unless the manifests change).
+COPY package.json pnpm-lock.yaml pnpm-workspace.yaml nx.json tsconfig.base.json eslint.config.mjs ./
+RUN pnpm install --frozen-lockfile
+
+# Sources (only what the app + its libs need).
+COPY apps/self-service apps/self-service
+COPY libs libs
+RUN pnpm nx build self-service
+
+FROM nginx:1.27-alpine AS runtime
+COPY apps/self-service/nginx.conf /etc/nginx/conf.d/default.conf
+COPY --from=build /src/dist/apps/self-service/browser /usr/share/nginx/html
+# Compose-time OIDC config: the browser (Playwright, on the compose network) reaches Keycloak by
+# service name, so the token issuer matches the BFF's authority (host-consistent, ADR-0010).
+RUN printf '{ "authority": "http://keycloak:8080/realms/digid" }\n' > /usr/share/nginx/html/config.json
+
+EXPOSE 80

apps/self-service/eslint.config.mjs

@@ -0,0 +1,34 @@
+import nx from '@nx/eslint-plugin';
+import baseConfig from '../../eslint.config.mjs';
+
+export default [
+  ...nx.configs['flat/angular'],
+  ...nx.configs['flat/angular-template'],
+  ...baseConfig,
+  {
+    files: ['**/*.ts'],
+    rules: {
+      '@angular-eslint/directive-selector': [
+        'error',
+        {
+          type: 'attribute',
+          prefix: 'app',
+          style: 'camelCase',
+        },
+      ],
+      '@angular-eslint/component-selector': [
+        'error',
+        {
+          type: 'element',
+          prefix: 'app',
+          style: 'kebab-case',
+        },
+      ],
+    },
+  },
+  {
+    files: ['**/*.html'],
+    // Override or add rules here
+    rules: {},
+  },
+];

apps/self-service/nginx.conf

@@ -0,0 +1,29 @@
+server {
+  listen 80;
+  server_name _;
+  root /usr/share/nginx/html;
+  index index.html;
+
+  # Resolve the BFF via Docker's embedded DNS at request time (variable proxy_pass), so nginx starts
+  # even before the BFF is up and picks up restarts — instead of failing to load the config.
+  resolver 127.0.0.11 ipv6=off valid=30s;
+
+  # Same-origin API: proxy the BFF endpoint groups to the bff service. The api-client uses relative
+  # URLs, so the browser calls this origin and nginx forwards to the BFF — no CORS, and the DigiD
+  # token (same-origin) is attached by the app's interceptor (S-08d/ADR-0010).
+  location /self-service/ {
+    set $bff http://bff:8080;
+    proxy_pass $bff;
+    proxy_set_header Host $host;
+  }
+  location /openbaar/ {
+    set $bff http://bff:8080;
+    proxy_pass $bff;
+    proxy_set_header Host $host;
+  }
+
+  # SPA fallback — Angular client-side routing.
+  location / {
+    try_files $uri $uri/ /index.html;
+  }
+}

apps/self-service/project.json

@@ -0,0 +1,80 @@
+{
+  "name": "self-service",
+  "$schema": "../../node_modules/nx/schemas/project-schema.json",
+  "projectType": "application",
+  "prefix": "app",
+  "sourceRoot": "apps/self-service/src",
+  "tags": [],
+  "targets": {
+    "build": {
+      "executor": "@angular/build:application",
+      "outputs": ["{options.outputPath}"],
+      "defaultConfiguration": "production",
+      "options": {
+        "outputPath": "dist/apps/self-service",
+        "browser": "apps/self-service/src/main.ts",
+        "tsConfig": "apps/self-service/tsconfig.app.json",
+        "assets": [
+          {
+            "glob": "**/*",
+            "input": "apps/self-service/public"
+          }
+        ],
+        "styles": ["apps/self-service/src/styles.css"]
+      },
+      "configurations": {
+        "production": {
+          "budgets": [
+            {
+              "type": "initial",
+              "maximumWarning": "1mb",
+              "maximumError": "2mb"
+            },
+            {
+              "type": "anyComponentStyle",
+              "maximumWarning": "4kb",
+              "maximumError": "8kb"
+            }
+          ],
+          "outputHashing": "all"
+        },
+        "development": {
+          "optimization": false,
+          "extractLicenses": false,
+          "sourceMap": true
+        }
+      }
+    },
+    "serve": {
+      "continuous": true,
+      "executor": "@angular/build:dev-server",
+      "defaultConfiguration": "development",
+      "configurations": {
+        "production": {
+          "buildTarget": "self-service:build:production"
+        },
+        "development": {
+          "buildTarget": "self-service:build:development"
+        }
+      }
+    },
+    "lint": {
+      "executor": "@nx/eslint:lint"
+    },
+    "test": {
+      "executor": "@angular/build:unit-test",
+      "options": {
+        "watch": false
+      }
+    },
+    "serve-static": {
+      "continuous": true,
+      "executor": "@nx/web:file-server",
+      "options": {
+        "buildTarget": "self-service:build",
+        "staticFilePath": "dist/apps/self-service/browser",
+        "spa": true
+      }
+    }
+  }
+}

apps/self-service/public/config.json

@@ -0,0 +1,3 @@
+{
+  "authority": "http://localhost:8180/realms/digid"
+}

apps/self-service/src/app/app.config.spec.ts

@@ -0,0 +1,65 @@
+import { provideHttpClient, withInterceptors } from '@angular/common/http';
+import { HttpTestingController, provideHttpClientTesting } from '@angular/common/http/testing';
+import { TestBed } from '@angular/core/testing';
+import { BffApiV1Service } from 'api-client';
+import { authInterceptor } from 'auth';
+import { AbstractSecurityStorage, ConfigurationService } from 'angular-auth-oidc-client';
+import { SECURE_API_ROUTES } from './app.config';
+
+// Guards the DigiD token wiring end-to-end. The api-client calls the BFF with RELATIVE URLs, and the
+// angular-auth-oidc-client interceptor attaches the token only when `req.url` starts with a configured
+// secureRoute. A regression to an absolute origin (as once shipped) makes the relative URL never match,
+// so the submit goes out unauthenticated and fails silently. This drives the REAL interceptor and the
+// REAL api-client against the REAL production route value (SECURE_API_ROUTES); only the config source
+// and the token storage are faked, so the assertion turns on the actual route-matching.
+describe('self-service DigiD token wiring', () => {
+  let http: HttpTestingController;
+  let bff: BffApiV1Service;
+  const token = 'digid-access-token';
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [
+        provideHttpClient(withInterceptors([authInterceptor()])),
+        provideHttpClientTesting(),
+        {
+          provide: ConfigurationService,
+          useValue: {
+            hasAtLeastOneConfig: () => true,
+            getAllConfigurations: () => [{ configId: 'digid', secureRoutes: SECURE_API_ROUTES }],
+          },
+        },
+        {
+          // A signed-in session: the storage the interceptor's token lookup reads from.
+          provide: AbstractSecurityStorage,
+          useValue: {
+            read: () => JSON.stringify({ authzData: token, authnResult: { id_token: 'id-token' } }),
+            write: () => undefined,
+            remove: () => undefined,
+            clear: () => undefined,
+          },
+        },
+      ],
+    });
+    http = TestBed.inject(HttpTestingController);
+    bff = TestBed.inject(BffApiV1Service);
+  });
+
+  afterEach(() => http.verify());
+
+  it('attaches the bearer token to the relative self-service BFF call', () => {
+    bff.postSelfServiceRegistrations().subscribe();
+
+    const req = http.expectOne('/self-service/registrations');
+    expect(req.request.headers.get('Authorization')).toBe(`Bearer ${token}`);
+    req.flush({ registrationId: 'reg-1', status: 'Ingediend' });
+  });
+
+  it('leaves the anonymous openbaar register call unauthenticated', () => {
+    bff.getOpenbaarRegister().subscribe();
+
+    const req = http.expectOne((r) => r.url === '/openbaar/register');
+    expect(req.request.headers.has('Authorization')).toBe(false);
+    req.flush([]);
+  });
+});

apps/self-service/src/app/app.config.ts

@@ -0,0 +1,42 @@
+import { provideHttpClient, withInterceptors } from '@angular/common/http';
+import {
+  ApplicationConfig,
+  provideBrowserGlobalErrorListeners,
+} from '@angular/core';
+import { provideRouter } from '@angular/router';
+import { authInterceptor, provideDigiadAuth } from 'auth';
+import { appRoutes } from './app.routes';
+
+/** Environment-specific settings fetched from /config.json at startup (see main.ts). */
+export interface RuntimeConfig {
+  /** The Keycloak `digid` realm issuer as the browser reaches it (dev: localhost; compose: keycloak:8080). */
+  authority: string;
+}
+
+/**
+ * Route prefixes whose requests carry the DigiD token. These MUST match the **relative** URLs the
+ * api-client actually calls (same-origin via the nginx proxy) — the interceptor matches on `req.url`,
+ * which stays relative, so an absolute origin would never match and the token would go unattached.
+ * `/openbaar/` is deliberately excluded: it is the anonymous public register.
+ */
+export const SECURE_API_ROUTES = ['/self-service/'];
+
+/**
+ * Build the app providers from runtime config. `redirectUrl` is the app's own origin (where Keycloak
+ * redirects back). `secureRoutes` uses {@link SECURE_API_ROUTES} — relative prefixes, not the origin.
+ */
+export function appConfig(runtime: RuntimeConfig): ApplicationConfig {
+  const origin = typeof window !== 'undefined' ? window.location.origin : '/';
+  return {
+    providers: [
+      provideBrowserGlobalErrorListeners(),
+      provideRouter(appRoutes),
+      provideHttpClient(withInterceptors([authInterceptor()])),
+      provideDigiadAuth({
+        authority: runtime.authority,
+        redirectUrl: origin,
+        secureRoutes: SECURE_API_ROUTES,
+      }),
+    ],
+  };
+}

apps/self-service/src/app/app.html

@@ -0,0 +1 @@
+<router-outlet></router-outlet>

apps/self-service/src/app/app.routes.ts

@@ -0,0 +1,7 @@
+import { Route } from '@angular/router';
+import { authenticatedGuard } from 'auth';
+import { RegistrationPage } from './registration/registration-page';
+
+export const appRoutes: Route[] = [
+  { path: '', component: RegistrationPage, canActivate: [authenticatedGuard] },
+];

apps/self-service/src/app/app.spec.ts

@@ -0,0 +1,15 @@
+import { provideRouter } from '@angular/router';
+import { render, screen } from '@testing-library/angular';
+import { App } from './app';
+
+describe('App', () => {
+  it('renders the router outlet shell', async () => {
+    const { container } = await render(App, {
+      providers: [provideRouter([])],
+    });
+
+    // The shell is a thin host for routed pages (the RegistrationPage owns the heading).
+    expect(container.querySelector('router-outlet')).toBeTruthy();
+    expect(screen).toBeTruthy();
+  });
+});

apps/self-service/src/app/app.ts

@@ -0,0 +1,12 @@
+import { Component } from '@angular/core';
+import { RouterModule } from '@angular/router';
+
+@Component({
+  imports: [RouterModule],
+  selector: 'app-root',
+  templateUrl: './app.html',
+  styleUrl: './app.css',
+})
+export class App {
+  protected title = 'self-service';
+}

apps/self-service/src/app/registration/registration-page.html

@@ -0,0 +1,27 @@
+<main utrecht-document class="utrecht-theme">
+  <utrecht-article>
+    <utrecht-heading-1>Zelfservice — BIG-registratie</utrecht-heading-1>
+
+    @if (submitted()) {
+      <p utrecht-paragraph role="status">
+        Uw registratie is ontvangen. Referentie: {{ reference() }}.
+      </p>
+    } @else {
+      <p utrecht-paragraph>U bent ingelogd met BSN {{ bsn() }}.</p>
+      @if (failed()) {
+        <p utrecht-paragraph role="alert">
+          Er ging iets mis bij het indienen van uw registratie. Probeer het opnieuw.
+        </p>
+      }
+      <button
+        utrecht-button
+        appearance="primary-action-button"
+        type="button"
+        [disabled]="submitting()"
+        (click)="submit()"
+      >
+        Registratie indienen
+      </button>
+    }
+  </utrecht-article>
+</main>

apps/self-service/src/app/registration/registration-page.spec.ts

@@ -0,0 +1,71 @@
+import { signal } from '@angular/core';
+import { fireEvent, render, screen } from '@testing-library/angular';
+import { of, throwError } from 'rxjs';
+import { AuthService } from 'auth';
+import { BffApiV1Service } from 'api-client';
+import { axe } from 'vitest-axe';
+import { RegistrationPage } from './registration-page';
+
+class FakeAuth extends AuthService {
+  readonly isAuthenticated = signal(true);
+  readonly bsn = signal<string | undefined>('123456782');
+  login(): void {
+    /* noop */
+  }
+  logout(): void {
+    /* noop */
+  }
+}
+
+function providers(post = vi.fn().mockReturnValue(of({ registrationId: 'reg-9', status: 'Ingediend' }))) {
+  return {
+    post,
+    providers: [
+      { provide: AuthService, useClass: FakeAuth },
+      { provide: BffApiV1Service, useValue: { postSelfServiceRegistrations: post } },
+    ],
+  };
+}
+
+describe('RegistrationPage', () => {
+  it('shows the signed-in BSN', async () => {
+    await render(RegistrationPage, { providers: providers().providers });
+    expect(screen.getByText(/123456782/)).toBeTruthy();
+  });
+
+  it('submits the registration and confirms', async () => {
+    const { post, providers: p } = providers();
+    await render(RegistrationPage, { providers: p });
+
+    fireEvent.click(screen.getByRole('button', { name: /indienen/i }));
+
+    expect(post).toHaveBeenCalledTimes(1);
+    expect(await screen.findByText(/ontvangen/i)).toBeTruthy();
+  });
+
+  it('shows an error and keeps the submit available when the BFF call fails', async () => {
+    const { post, providers: p } = providers(vi.fn().mockReturnValue(throwError(() => new Error('BFF rejected'))));
+    await render(RegistrationPage, { providers: p });
+
+    fireEvent.click(screen.getByRole('button', { name: /indienen/i }));
+
+    expect(post).toHaveBeenCalledTimes(1);
+    // The failure is surfaced (not swallowed), the confirmation is not shown, and the user can retry.
+    expect(await screen.findByRole('alert')).toBeTruthy();
+    expect(screen.queryByText(/ontvangen/i)).toBeNull();
+    expect(screen.getByRole('button', { name: /indienen/i })).toBeTruthy();
+  });
+
+  it('has no WCAG 2.1 AA violations on the submit page', async () => {
+    // The portal is Dutch; the real index.html sets lang. Set it here so the document-level
+    // html-has-lang rule reflects the app, not the bare jsdom document.
+    document.documentElement.lang = 'nl';
+    const { container } = await render(RegistrationPage, { providers: providers().providers });
+
+    const results = await axe(container, {
+      runOnly: { type: 'tag', values: ['wcag2a', 'wcag2aa', 'wcag21a', 'wcag21aa'] },
+    });
+
+    expect(results.violations).toEqual([]);
+  });
+});

apps/self-service/src/app/registration/registration-page.ts

@@ -0,0 +1,42 @@
+import { Component, inject, signal } from '@angular/core';
+import { BffApiV1Service, type SubmitAccepted } from 'api-client';
+import { AuthService } from 'auth';
+import { UtrechtComponentsModule } from 'ui';
+
+/**
+ * The self-service submit page: a signed-in zorgprofessional confirms and submits their BIG
+ * registration. The bsn comes from the DigiD token (not a form field), so this is a confirm-and-
+ * submit flow that posts to the BFF and shows the returned reference (ADR-0010; S-08c).
+ */
+@Component({
+  selector: 'app-registration-page',
+  imports: [UtrechtComponentsModule],
+  templateUrl: './registration-page.html',
+})
+export class RegistrationPage {
+  private readonly auth = inject(AuthService);
+  private readonly bff = inject(BffApiV1Service);
+
+  protected readonly bsn = this.auth.bsn;
+  protected readonly submitting = signal(false);
+  protected readonly reference = signal<string | undefined>(undefined);
+  protected readonly submitted = signal(false);
+  protected readonly failed = signal(false);
+
+  submit(): void {
+    this.submitting.set(true);
+    this.failed.set(false);
+    this.bff.postSelfServiceRegistrations().subscribe({
+      next: (accepted: SubmitAccepted) => {
+        this.reference.set(accepted.registrationId);
+        this.submitted.set(true);
+        this.submitting.set(false);
+      },
+      // Surface the failure instead of swallowing it: re-enable the button so the user can retry.
+      error: () => {
+        this.failed.set(true);
+        this.submitting.set(false);
+      },
+    });
+  }
+}

apps/self-service/src/index.html

@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="nl">
+  <head>
+    <meta charset="utf-8" />
+    <title>self-service</title>
+    <base href="/" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="icon" type="image/x-icon" href="favicon.ico" />
+  </head>
+  <body>
+    <app-root></app-root>
+  </body>
+</html>

apps/self-service/src/main.ts

@@ -0,0 +1,10 @@
+import { bootstrapApplication } from '@angular/platform-browser';
+import { App } from './app/app';
+import { appConfig, type RuntimeConfig } from './app/app.config';
+
+// Load environment config before bootstrap so the OIDC authority is set per environment
+// (dev: localhost; compose: keycloak:8080) from a single build — 12-factor (S-08d).
+fetch('config.json')
+  .then((response) => response.json() as Promise<RuntimeConfig>)
+  .then((config) => bootstrapApplication(App, appConfig(config)))
+  .catch((err) => console.error(err));

apps/self-service/src/styles.css

@@ -0,0 +1,2 @@
+/* NL Design System theme — Utrecht design tokens (docs/frontend-decisions.md). */
+@import '@utrecht/design-tokens/dist/index.css';

apps/self-service/tsconfig.app.json

@@ -0,0 +1,9 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../dist/out-tsc",
+    "types": []
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": ["src/**/*.spec.ts", "src/**/*.test.ts"]
+}

apps/self-service/tsconfig.json

@@ -0,0 +1,31 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "strict": true,
+    "noImplicitOverride": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "isolatedModules": true,
+    "target": "es2022",
+    "moduleResolution": "bundler",
+    "emitDecoratorMetadata": false,
+    "module": "preserve"
+  },
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictTemplates": true
+  },
+  "files": [],
+  "include": [],
+  "references": [
+    {
+      "path": "./tsconfig.app.json"
+    },
+    {
+      "path": "./tsconfig.spec.json"
+    }
+  ]
+}

apps/self-service/tsconfig.spec.json

@@ -0,0 +1,8 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../dist/out-tsc",
+    "types": ["vitest/globals"]
+  },
+  "include": ["src/**/*.ts", "src/**/*.d.ts"]
+}

docs/architecture/adr-0008-read-projection-store.md

@@ -0,0 +1,89 @@
+# ADR-0008: The read projection — a shared, rebuildable store with a writer and a reader
+
+- **Status:** Accepted
+- **Date:** 2026-06-30
+- **Deciders:** Respellion engineering
+- **Relates to:** S-06 (#7); builds on ADR-0001 (loose coupling), ADR-0007 (#56, OZ→NRC wiring); first EF Core usage in the repo
+
+## Context
+
+S-06 (#7) adds the upstream event path's destination: an **Event Subscriber** that consumes
+NRC notifications and a **read projection** the openbaar register reads. The walking-skeleton
+projection (PRD §8.4) holds one row per zaak — `id`, `bsn`, `naam_placeholder`, `status` —
+and must be **idempotent** (NRC redelivers and reorders, CLAUDE.md §8.6) and **rebuildable**
+(a derived artefact, never a write-only source of truth).
+
+Two design questions had no obvious answer:
+
+1. **Where does `bsn` come from?** The NRC `zaken`/`zaak`/`create` notification carries only the
+   zaak URL plus the fixed `kenmerken` (`bronorganisatie`, `zaaktype`, `vertrouwelijkheidaanduiding`).
+   It does **not** carry the bsn. Reading it means calling a ZGW API — which **only the ACL** may
+   do (CLAUDE.md §8.1). The issue's "Touches" lists only `event-subscriber` + `projection-api`,
+   not the ACL.
+2. **Who owns the projection schema?** The subscriber writes the projection; the projection-api
+   reads it. CLAUDE.md §8.5 says "no direct DB access across services; each service owns its
+   schema." Two deployables on one table looks like a violation.
+
+## Decision
+
+**One Postgres database is the read projection. The Event Subscriber writes it (projector) and
+the projection-api reads it (query); both are processes of the single "Read Projection" bounded
+context and share one schema, defined in a shared `Projection.ReadModel` library. `bsn` is
+deferred.**
+
+- **Schema ownership.** The read model — `register_projection` plus the subscriber's
+  `processed_notifications` log — lives in `services/projection-api/Projection.ReadModel`
+  (EF Core + Npgsql). Both services reference it. This is the textbook CQRS read-model split
+  (one writer, one reader over one derived store), **not** the cross-*domain* DB reach §8.5
+  forbids: no domain owns write-state here; the projection is rebuildable (§8.4). §8.5 still
+  holds for every domain database.
+- **Idempotency** is the primary key on `processed_notifications.key` (a deterministic key
+  derived from the immutable notification content). A duplicate insert raises a unique violation,
+  caught and reported as "already recorded", so the duplicate never reaches the projection. The
+  projection upsert is itself idempotent on the zaak id, a second line of defence.
+- **Rebuild replays the log, not OpenZaak.** `POST /admin/rebuild` clears `register_projection`
+  and reprojects every row in `processed_notifications`. So "rebuildable" needs **no** ZGW access
+  (§8.1) and no ACL dependency — keeping S-06 within its stated scope.
+- **`bsn` and `naam_placeholder` are deferred.** They are columns (nullable) but the minimal slice
+  populates only `id` + `status` (`INGEDIEND`) from the notification. Populating personal data
+  requires reading the zaak **through the ACL** (§8.1) and is its own follow-up; the column shape
+  is in place so that change is additive.
+- **New dependency: EF Core 10 + `Npgsql.EntityFrameworkCore.PostgreSQL`.** What it gives us: a
+  migrated relational schema, LINQ queries, and a clean port implementation. What we'd write
+  instead: hand-rolled SQL + a migration runner. Risk: ORM complexity and an extra dependency
+  graph — bounded here to a tiny two-table read model. `dotnet-ef` is pinned as a local tool for
+  migrations; `NuGetAuditMode=direct` keeps EF's design-time-only tooling transitive out of the
+  audited, shipped graph.
+
+The end-to-end path is verified by a runner-safe live-stack smoke (`infra/run-projection-check.sh`,
+the `verify-projection` step of the `verify-stack` job, #58): register an abonnement at the real
+Event Subscriber's callback, create a zaak, assert projection-api serves an `INGEDIEND` row — all
+in-network, reaching services by container IP (ADR-0006/0007).
+
+## Consequences
+
+- **Positive:** the upstream event path reaches a queryable projection; idempotent and rebuildable
+  without OpenZaak; S-06 stays inside its stated touch-set (no ACL change); the projection-api is
+  ready for S-09 to tighten public-safe field filtering.
+- **Negative / deferred:**
+  - `bsn`/`naam_placeholder` stay empty until a follow-up wires zaak reads via the ACL.
+  - The abonnement is registered by the verify harness (by container IP), not provisioned
+    persistently — ADR-0007 already deferred a persistent abonnement, and a single-label service
+    host is not URL-valid for NRC, so persistent registration needs a dotted network alias. Tracked
+    as a follow-up; a plain `make up` therefore needs the abonnement registered before the event
+    path flows.
+  - Two services share one database. Acceptable for a derived read model; revisit if the read and
+    write sides ever need independent scaling or storage.
+
+## Alternatives considered
+
+- **Subscriber reads OpenZaak directly to fill `bsn`** — rejected: breaks §8.1 (only the ACL talks
+  to ZGW) and would need its own ADR to bend the rule.
+- **Extend the ACL with a zaak-read operation, consumed as a library** — viable and §8.1-clean, but
+  it grows S-06 beyond its stated scope (touches the ACL) and pulls personal-data handling forward;
+  deferred to a follow-up.
+- **projection-api owns the DB and exposes an internal write endpoint the subscriber calls** —
+  rejected for the walking skeleton: adds an HTTP hop and a write surface on a read service for no
+  current benefit over a shared, rebuildable read model.
+- **Separate databases for the log and the projection** — rejected as premature: both are the read
+  side's private, rebuildable state; one DB is simpler and still honours §8.5's intent.

docs/architecture/adr-0009-external-task-job-worker.md

@@ -0,0 +1,88 @@
+# ADR-0009: The Domain Service drives Flowable as an external-task job worker
+
+- **Status:** Accepted
+- **Date:** 2026-06-30
+- **Deciders:** Respellion engineering
+- **Relates to:** S-05 (#6); proposal #60; builds on ADR-0001 (loose coupling, §8.1/§8.2), S-03 (#4, the `registratie` BPMN), S-04 (#5, the ACL `OpenZaak` operation)
+
+## Context
+
+S-05 (#6) adds the **BIG Domain Service**. Submitting a registration must: create a
+`Registration` aggregate, **start the Flowable `registratie` process** (S-03), have the
+`OpenZaakAanmaken` task **open a zaak via the ACL** (S-04), and store the resulting zaak URL
+back on the aggregate.
+
+`OpenZaakAanmaken` is a Flowable **external-worker** service task (`flowable:type="external-worker"`,
+topic `OpenZaakAanmaken`). Flowable does not push it anywhere — it parks the job and waits for a
+worker to **acquire and lock** it, do the work, and **complete** it. Two coupling rules constrain
+who may do what:
+
+- **§8.2 — the Workflow Client is the only code that talks to Flowable.** BPMN models never embed
+  OpenZaak knowledge; they ask the Workflow Client to execute external tasks.
+- **§8.1 — the ACL is the only code that talks to ZGW.** The worker opens the zaak *through the ACL*,
+  never by constructing ZGW URLs itself.
+
+This is an ADR-worthy moment (§14): a service boundary is defined and both coupling rules are
+exercised. The open question is *how* the external task is driven.
+
+## Decision
+
+**The Domain Service drives the `OpenZaakAanmaken` task as a hosted external-task job worker
+(PRD §36). Orchestration is eventually consistent, not request-synchronous.**
+
+- **`POST /registrations` is fast and side-effecting only on the domain side.** It creates the
+  `Registration` aggregate in state `INGEDIEND`, persists it, and asks the Workflow Client to start
+  one `registratie` process instance, recording the process-instance id on the aggregate. It returns
+  immediately; it does **not** wait for the zaak to be opened.
+- **A hosted worker polls Flowable for `OpenZaakAanmaken` jobs.** It acquires and locks a job, calls
+  the ACL `OpenZaak` operation (§8.1), attaches the returned zaak URL to the matching aggregate
+  (`Registration.AttachZaak`), and completes the job in Flowable. The process then runs to its end
+  event.
+- **The Workflow Client is the only Flowable client (§8.2).** It lives in the Domain Service's
+  `Infrastructure` layer and speaks Flowable's REST API (start process-instance; acquire/lock/complete
+  external-worker jobs). No other code — not the Application layer, not the BPMN — knows Flowable
+  exists.
+- **The worker *logic* is an Application service over ports**, not Flowable-aware code. `OpenZaakWorker`
+  takes an acquired job (topic + the registration id it carries), calls `IAclClient` and
+  `IRegistrationStore`, and returns the zaak URL to complete with. The **polling loop** is a thin
+  `BackgroundService` in `Infrastructure` that fetches jobs via the Workflow Client and feeds them to
+  the worker. So the orchestration is covered by fast unit tests against fakes; only the REST framing
+  needs a container integration test.
+
+## Scope decisions for the minimal slice
+
+- **Registration persistence is in-memory.** The walking skeleton's *read* path is fed by
+  NRC → Event Subscriber → projection (S-06, #7), not by the domain database. An EF-backed domain
+  store buys nothing the demo needs yet, so it is a documented follow-up; the `IRegistrationStore`
+  port keeps that change additive. (PRD §88 envisions EF Core for the domain DB eventually.)
+- **The aggregate's state machine is minimal:** `INGEDIEND` on submission. Later flows (withdrawal,
+  beoordeling, herregistratie) add states in their own slices — they are out of scope here.
+- **No bsn flows to ZGW yet.** The ACL `OpenZaak` operation already default-fills the ZGW-mandatory
+  fields (ADR-0003) and takes the bsn as its domain payload; the domain hands it through unchanged.
+
+## Consequences
+
+- **Positive:** the submit request is decoupled from ACL/OpenZaak latency; the documented Common
+  Ground pattern (external-task worker) is realised; both coupling rules (§8.1, §8.2) hold with the
+  Flowable knowledge isolated to one Infrastructure class; the orchestration is unit-testable.
+- **Negative / deferred:**
+  - Eventual consistency: immediately after `POST /registrations` the aggregate has no zaak URL yet.
+    Acceptable — the read side is the projection, not the domain store.
+  - In-memory registration state is lost on restart; fine for the skeleton, replaced by an EF store
+    in a follow-up.
+  - The worker polls (no push); poll interval is a tuning knob, not a correctness concern, since
+    Flowable holds the job until completed.
+
+## Alternatives considered
+
+- **Synchronous acquire+complete inside the `POST /registrations` request** — rejected: simpler and
+  deterministic, but couples the submit request to ACL/OpenZaak latency and failure, and is not the
+  external-task worker pattern PRD §36 mandates. It would also make the request fail if OpenZaak is
+  briefly down, instead of the job simply staying parked for the worker to retry.
+- **A standalone Workflow Client service, separate from the Domain Service** — rejected for this
+  slice: the worker needs the domain's aggregate store and the ACL client anyway, and PRD §9 places
+  the Workflow Client inside the Domain Service deployment. A separate process adds a hop and a
+  shared store for no current benefit.
+- **Flowable pushes to a webhook instead of being polled** — rejected: Flowable's external-worker
+  model is pull-based (acquire/lock/complete); a push shim would re-implement it with weaker
+  delivery guarantees.

docs/architecture/adr-0010-bff-oidc.md

@@ -0,0 +1,74 @@
+# ADR-0010: The BFF validates Keycloak tokens and is the portals' only backend
+
+- **Status:** Accepted
+- **Date:** 2026-07-01
+- **Deciders:** Respellion engineering
+- **Relates to:** S-07 (#8); proposal #63; builds on ADR-0001 (loose coupling, §8.3), S-02 (#3, Keycloak realms), S-05 (#6, Domain Service), S-06 (#7, read projection)
+
+## Context
+
+S-07 (#8) adds the **BFF (Backend-for-Frontend)** — the single backend the Angular portals talk
+to (CLAUDE.md §8.3). For the walking skeleton it exposes two endpoints and fans out to services
+already built:
+
+- `POST /self-service/registrations` → Domain Service `POST /registrations` (S-05).
+- `GET /openbaar/register?q=…` → projection-api `GET /register` (S-06).
+
+It must validate tokens issued by Keycloak (S-02). This is an ADR-worthy moment (§14): a new
+dependency (JWT bearer authentication) and two new service boundaries (BFF→domain, BFF→projection).
+
+## Decision
+
+**The BFF is the portals' only backend; it validates Keycloak `digid`-realm JWTs on the
+self-service endpoint, leaves the openbaar lookup anonymous, and fans out to the domain and
+projection over typed HTTP clients.**
+
+- **Auth model.** `POST /self-service/registrations` requires a valid `digid`-realm bearer token;
+  the BFF reads the `bsn` claim and forwards it to the domain. Missing / invalid / expired token →
+  **401**. `GET /openbaar/register` is **anonymous** — the openbaar register is a public lookup
+  (S-09), so no token is required.
+- **Portals talk only to the BFF (§8.3).** They never call the Domain Service, ACL, projection, or
+  OpenZaak directly. The BFF orchestrates via typed `HttpClient`s whose base URLs come from config.
+  Downstream calls are unauthenticated on the internal network for the walking skeleton; a
+  service-to-service auth story (e.g. client-credentials) is a later slice, not this one.
+- **Validation is `Microsoft.AspNetCore.Authentication.JwtBearer`** pointed at the Keycloak `digid`
+  realm authority. **New dependency justification:** it gives us standards-based OIDC/JWT validation
+  (signature, issuer, expiry, audience) maintained by the framework; rolling our own JWT validation
+  would be error-prone security code; the risk is a first-party ASP.NET Core package — minimal.
+- **Tests mint their own tokens.** `WebApplicationFactory` tests override the bearer options with a
+  **test signing key**, so valid / invalid / expired tokens are minted in-process without a live
+  Keycloak. Real Keycloak validation is exercised by a live-stack `verify-bff` check.
+- **OpenAPI is generated and committed** (`services/bff/openapi.json`) from .NET's built-in OpenAPI,
+  so S-08's Angular client is generated from the spec, never hand-written (§10).
+
+## Known wrinkle — container OIDC issuer mismatch
+
+Keycloak stamps tokens with an `iss` equal to its **browser-facing** URL (what the portal used to
+log in), which differs from the BFF's **in-container** authority (`http://keycloak:8080/realms/digid`).
+Strict issuer validation then rejects otherwise-valid tokens. Unit tests avoid this (test key).
+`verify-bff` handles it by aligning the configured authority/issuer with the token's `iss` (and, if
+needed, disabling metadata address rewriting). Recorded so it is not rediscovered each time.
+
+## Consequences
+
+- **Positive:** the walking skeleton gains its front door; §8.3 holds with all portal traffic going
+  through one backend; token validation is standard and testable without infra; the committed
+  OpenAPI unblocks S-08.
+- **Negative / deferred:**
+  - Downstream service-to-service auth is deferred (internal-network trust for now).
+  - The openbaar endpoint is anonymous; when public-safe field filtering tightens (S-09) it stays
+    anonymous but the projection query narrows.
+  - The issuer-mismatch handling is dev-oriented; a production reverse-proxy setup would align the
+    browser and internal issuer URLs instead.
+
+## Alternatives considered
+
+- **Token-gate the openbaar endpoint too** — rejected: the openbaar register is public by design
+  (S-09); requiring a login would contradict the slice's intent.
+- **Validate tokens by calling Keycloak's introspection endpoint per request** — rejected: adds a
+  network hop per call and a Keycloak dependency on the hot path; local JWT signature validation via
+  the realm's JWKS is the standard, faster choice.
+- **Hand-written JWT parsing** — rejected: security-sensitive code we shouldn't own when a
+  first-party validator exists.
+- **Generate the OpenAPI client by hand / keep the spec uncommitted** — rejected: §10 requires a
+  generated client from a committed spec.

docs/demo-script.md

@@ -0,0 +1,170 @@
+# Demo script
+
+A running log of demoable outcomes, one section per slice. Each entry is a short,
+copy-pasteable walkthrough against a local `make up` stack.
+
+---
+
+## S-08d — Walking skeleton complete: browser → submit, end-to-end
+
+**Outcome:** the self-service portal is served in the stack and the full front-of-house happy path
+runs in a real browser — **mock DigiD login → submit → confirmation** — closing the walking skeleton
+(portal → BFF → domain → Flowable → ACL → OpenZaak, with the openbaar register reading the projection).
+
+```bash
+# 1. Bring the whole stack up (portal served on :8140, BFF :8080, Keycloak :8180).
+make up
+
+# 2. Automated happy path — Playwright, inside the compose network (issuer-consistent):
+make verify-e2e          # → login as jan-burger → submit → "ontvangen" confirmation
+
+# 3. By hand: open the portal, log in as jan-burger / test123, click "Registratie indienen".
+open http://localhost:8140
+```
+
+> The portal is served same-origin with the BFF (nginx proxies `/self-service` + `/openbaar`), so no
+> CORS; the OIDC authority comes from `/config.json` at runtime. See `docs/frontend-decisions.md`.
+
+---
+
+## S-08c — Self-service submit form (NL Design System + DigiD)
+
+**Outcome:** a zorgprofessional logs in via mock DigiD and submits a BIG registration through the
+self-service portal (NL Design System styling); the page confirms with the reference returned by the
+BFF. The bsn comes from the DigiD token, so it's a confirm-and-submit flow (no bsn field).
+
+```bash
+# 1. Bring the backend + Keycloak up (BFF on :8080, Keycloak on :8180).
+make up
+
+# 2. Serve the portal (dev server); it redirects to Keycloak for DigiD login.
+pnpm nx serve self-service        # → http://localhost:4200
+
+# 3. In the browser: log in as the mock DigiD user jan-burger / test123, then submit.
+#    The page shows the returned registration reference.
+```
+
+> First real UI. The full **login → submit → success** happy path is automated in **S-08d**
+> (Playwright, against the compose-served app). Component tests + an axe WCAG 2.1 AA check on the
+> submit page run headless in the `frontend` CI lane. See `docs/frontend-decisions.md`.
+
+---
+
+## S-08a — Nx workspace + self-service portal skeleton
+
+**Outcome:** the frontend foundation — an Nx (pnpm) monorepo with the `self-service` Angular app
+(standalone + signals), lint/test/build green in a CI Node lane. The login + submit form follow in
+S-08c.
+
+```bash
+# From a fresh clone (Node 24 + pnpm 11):
+pnpm install                       # native builds are pre-approved in pnpm-workspace.yaml
+pnpm nx test self-service          # Vitest component test
+pnpm nx build self-service         # production build
+pnpm nx serve self-service         # → http://localhost:4200  (placeholder page)
+# Or the CI-equivalent one-shot:
+make frontend                      # install + nx lint/test/build
+```
+
+> Nx manages only `apps/`+`libs/`; the .NET services stay on `dotnet`/the Makefile. NL Design System
+> and the real form arrive in S-08c (#67); see `docs/frontend-decisions.md`.
+
+---
+
+## S-07 — BFF: the portals' single backend
+
+**Outcome:** the BFF validates Keycloak `digid` tokens on the self-service submit (forwarding the
+bsn to the domain) and serves the openbaar register anonymously with only public-safe fields — the
+front door the portals (S-08/S-09) will talk to.
+
+**The path:** portal → BFF `POST /self-service/registrations` (token-gated) → domain; and
+BFF `GET /openbaar/register` (anonymous) → projection-api. See ADR-0010.
+
+```bash
+# 1. Bring the full stack up.
+make up
+
+# 2. Drive the BFF end-to-end (401 without a token, 202 with a real digid token, anonymous openbaar).
+make verify-bff        # → "OK — BFF: 401 without token, 202 with a digid token, anonymous ..."
+
+# 3. Try it by hand (BFF on host port 8080).
+#    a) A digid access token for the mock user jan-burger (bsn 123456782):
+tok=$(curl -s -X POST http://localhost:8180/realms/digid/protocol/openid-connect/token \
+  -d grant_type=password -d client_id=big-portal -d username=jan-burger -d password=test123 \
+  | python3 -c "import sys,json;print(json.load(sys.stdin)['access_token'])")
+
+#    b) Submit — without the token it is 401; with it, 202:
+curl -s -o /dev/null -w "no token  -> %{http_code}\n" -X POST http://localhost:8080/self-service/registrations
+curl -s -o /dev/null -w "with token-> %{http_code}\n" -X POST http://localhost:8080/self-service/registrations \
+  -H "Authorization: Bearer $tok"
+
+#    c) The openbaar register is anonymous and exposes only id + status (never the bsn):
+curl -fsS http://localhost:8080/openbaar/register | jq
+```
+
+> The self-service token is validated against Keycloak's `digid` realm; the openbaar lookup needs no
+> token (S-09). The generated contract lives at `services/bff/openapi.json` — S-08's client is built
+> from it.
+
+---
+
+## S-05 — BIG Domain Service: submit a registration
+
+**Outcome:** submitting a registration starts a Flowable process; the external-task worker
+opens a zaak via the ACL and records it on the aggregate — the upstream half of the skeleton
+that produces the zaak S-06 then projects.
+
+**The path:** domain `POST /registrations` → Flowable `registratie` process → `OpenZaakAanmaken`
+worker → ACL → OpenZaak; `GET /registrations/{id}` shows the opened zaak (ADR-0009).
+
+```bash
+# 1. Bring the full stack up (seeds config, builds our services, waits for health).
+make up
+
+# 2. Drive the full path end-to-end. This also seeds a published BIG zaaktype and points the
+#    ACL at it (the zaak's zaaktype URL is server-assigned, so it isn't known at bring-up).
+make verify-domain      # → "OK — the domain opened a zaak and recorded it on the registration"
+
+# 3. Submit one yourself (domain on host port 8130). Returns 202 + a Location to read back.
+loc=$(curl -fsS -D - -o /dev/null -X POST http://localhost:8130/registrations \
+  -H 'Content-Type: application/json' -d '{"bsn":"123456782"}' | sed -n 's/\r$//; s/^[Ll]ocation: //p')
+
+# 4. The worker opens the zaak off the request path (eventual consistency, ADR-0009); poll
+#    until zaakUrl is filled. (Step 2 must have run first, so the ACL knows the zaaktype.)
+curl -fsS "http://localhost:8130$loc" | jq
+# → { "registrationId": "...", "status": "Ingediend", "zaakUrl": "http://.../zaken/api/v1/zaken/<uuid>" }
+```
+
+> Registration state is in-memory for this slice (ADR-0009); the rebuildable read model is the
+> projection (S-06), fed by the very zaak this flow opens.
+
+---
+
+## S-06 — Event Subscriber + read projection
+
+**Outcome:** a zaak created in OpenZaak flows through NRC to the Event Subscriber, which
+projects it into a rebuildable read projection the projection-api serves.
+
+**The path:** OpenZaak → (notification) NRC → (abonnement callback) Event Subscriber →
+`register_projection` → projection-api `GET /register`.
+
+```bash
+# 1. Bring the full stack up (seeds config, builds our services, waits for health).
+make up
+
+# 2. Register the Event Subscriber's abonnement and create a zaak, then read it back.
+#    (The verify-projection check does exactly this end-to-end and asserts the result.)
+make verify-projection            # → "OK — projection-api serves zaak <uuid> with status INGEDIEND"
+
+# 3. Observe the projection directly via the read API (host port 8120).
+curl -fsS http://localhost:8120/register | jq
+# → [ { "id": "<zaak-uuid>", "status": "INGEDIEND", "bsn": null, "naamPlaceholder": null } ]
+
+# 4. Idempotency + rebuild: replays don't duplicate; a rebuild repopulates from the
+#    notification log (no OpenZaak access needed — ADR-0008).
+curl -fsS -X POST http://localhost:8110/admin/rebuild   # Event Subscriber, host port 8110
+curl -fsS http://localhost:8120/register | jq 'length'  # → unchanged
+```
+
+> `bsn` / `naam_placeholder` are deferred (ADR-0008) — the notification doesn't carry them and
+> the subscriber may not read OpenZaak directly (§8.1). They surface in a later slice.

docs/frontend-decisions.md

@@ -0,0 +1,103 @@
+# Frontend decisions
+
+A running log of frontend tooling and component decisions (CLAUDE.md §10). One entry per
+decision; record *why*, and note any deviation from NL Design System.
+
+---
+
+## Workspace & tooling (S-08a, #65)
+
+The portals live in an **Nx monorepo at the repository root**, alongside the .NET `services/`.
+
+- **Package manager: pnpm.** Native build scripts are approved explicitly in `pnpm-workspace.yaml`
+  under `allowBuilds` (pnpm 11 fails the install otherwise). Node 24, pnpm 11.
+- **Angular, standalone components + signals, no NgModules** (§10). Apps are generated with
+  `@nx/angular:application`.
+- **Unit tests: Vitest** via Angular's built-in `@angular/build:unit-test` (the `vitest-angular`
+  runner). **Angular Testing Library** is added for component tests when the first real components
+  land (S-08c); the S-08a placeholder uses a plain `TestBed` render assertion.
+- **Lint: ESLint** (flat config, `@nx/eslint`).
+- **Nx is scoped to `apps/` + `libs/` only.** The `@nx/docker` and `@nx/dotnet` plugins are **not**
+  installed — the .NET services are built by `dotnet`/the Makefile, and `@nx/docker` would otherwise
+  infer every `services/*/Dockerfile` as an unnamed Nx project and break the project graph.
+- **No Nx Cloud.** `nxCloudId` is stripped from `nx.json`; remote caching would depend on an
+  external service, and the repo is Gitea-only (§8.7). Nx's "configure-ai-agents" additions
+  (`.claude/settings.json`, a CLAUDE.md section referencing a GitHub marketplace) are **not**
+  committed for the same reason.
+- **CI:** a `frontend` job (`make frontend` → `pnpm install --frozen-lockfile` + `nx run-many -t
+  lint test build`) runs on pnpm + Node, with pinned action URLs (§15).
+
+**NL Design System:** not yet introduced — the S-08a app is a placeholder. NL DS components arrive
+with the submit form (S-08c, #67); any deviation from NL DS will be recorded here.
+
+---
+
+## API client generator (S-08b, #66)
+
+`libs/api-client` is **generated from `services/bff/openapi.json`** — never hand-written (§10).
+
+- **Generator: orval** (`client: 'angular'`), a **node-based** generator (no Java, unlike
+  `openapi-generator`), so it runs in the pnpm/Node CI lane. It emits an injectable
+  `BffApiV1Service` using Angular's `HttpClient` — which means the DigiD bearer token can be attached
+  by an **`HttpInterceptor`** (S-08c), the idiomatic Angular approach; a fetch-based SDK would bypass
+  the interceptor pipeline.
+- **Config:** `libs/api-client/orval.config.ts` (single-file output into `src/lib/generated/`,
+  `clean: true`, prettier). **Regenerate with `nx run api-client:generate`** after the BFF spec
+  changes; the output is deterministic (idempotent), and `src/lib/generated/` is never hand-edited.
+- **Tested** against a mocked BFF via `HttpClientTesting` (`libs/api-client/src/lib/bff-api.spec.ts`).
+- The BFF endpoints carry no `operationId`, so orval synthesises method names
+  (`postSelfServiceRegistrations`, `getOpenbaarRegister`); adding explicit operation ids to the BFF
+  is a possible later polish.
+
+---
+
+## Self-service form: NL DS, DigiD auth, testing (S-08c, #67)
+
+- **NL Design System via `@utrecht/component-library-angular`** (`libs/ui`) + `@utrecht/design-tokens`
+  (imported once in `apps/self-service/src/styles.css`). Utrecht is NL DS's reference Angular
+  implementation. Its v3 components are **NgModule-based, not standalone**, so `libs/ui` re-exports
+  `UtrechtComponentsModule` (and the component classes, so the AOT compiler resolves the template
+  directives through the barrel); standalone components consume it via `imports: [UtrechtComponentsModule]`.
+  §10's "no NgModules in new code" governs *our* code — consuming a third-party module is fine.
+- **DigiD login via `angular-auth-oidc-client`** (`libs/auth`): auth-code + PKCE against the Keycloak
+  `digid` realm (public client `big-portal`). A small **`AuthService` abstraction** (bsn /
+  isAuthenticated / login) wraps the library so components and the `authenticatedGuard` depend on a
+  mockable surface; a **token `HttpInterceptor`** attaches the bearer to BFF calls (secure route).
+  The OIDC `authority`/`secureApiOrigin` are dev defaults in `app.config.ts`; the compose-served app
+  overrides them (S-08d), and the browser-vs-container issuer alignment is handled there (ADR-0010).
+- **Testing:** component tests use **`@testing-library/angular`** (§10) with `AuthService` and the
+  api-client mocked; the **axe** (`vitest-axe`) check runs scoped to WCAG 2.1 AA tags
+  (`wcag2a/2aa/21a/21aa`) with the document `lang` set, asserting zero violations on the submit page.
+  The real DigiD browser round-trip is exercised in S-08d (Playwright).
+- **Module boundaries:** replaced the demo eslint `depConstraints` (`scope:shop`/`scope:shared`, left
+  over from the Nx angular template) with a permissive `*` default; scope/type tags can be
+  introduced when the portal set grows.
+
+---
+
+## Serving + e2e (S-08d, #68)
+
+- **Served by nginx, same-origin as the BFF.** The compose `self-service` image serves the built app
+  and **reverse-proxies** `/self-service/*` + `/openbaar/*` to the `bff` service. Because the
+  api-client uses **relative URLs**, the browser calls the app's own origin → nginx forwards to the
+  BFF: **no CORS**, and the DigiD token (same-origin) is attached by the interceptor. nginx resolves
+  the BFF at request time (a `resolver` + variable `proxy_pass`) so it starts before the BFF is up.
+- **Runtime config.** The app fetches `/config.json` before bootstrap (`main.ts`); `appConfig` is a
+  factory. The dev default (`public/config.json`) points at `localhost:8180`; the Docker image bakes
+  the compose value (`keycloak:8080`). One build, per-environment OIDC authority.
+- **e2e runs inside the compose network.** `infra/run-e2e-check.sh` runs Playwright in a `node`
+  container on `cg`, so the browser reaches Keycloak as `keycloak:8080` — the **same issuer** the BFF
+  validates against (resolves the browser-vs-container mismatch, ADR-0010). Chromium is installed at
+  runtime, so there's no Playwright-image-version pinning to keep in sync. The spec is copied in
+  (`docker cp`), not mounted, so it leaves nothing root-owned on the host. Wired as `verify-e2e` in
+  the `verify-stack` CI job.
+- **e2e treats the portal origin as secure.** In-network the portal is served over plain HTTP on a
+  non-localhost origin (`http://self-service`), which is **not a secure context**, so Web Crypto
+  (`crypto.subtle`) is unavailable. angular-auth-oidc-client needs it for the PKCE code challenge, so
+  `authorize()` throws and the login redirect never fires. Production runs behind HTTPS where this is
+  a non-issue; rather than terminate TLS in the throwaway stack, the Playwright config passes
+  `--unsafely-treat-insecure-origin-as-secure` (honoured only by the full `channel: 'chromium'`
+  build, not the default headless-shell). This emulates the production HTTPS secure context without
+  touching the app or its production config.
+- `tests/e2e` is a standalone Playwright project (its own `package.json`), not an Nx project — it's a
+  live-stack check like the other `verify-*` runners, not part of the `frontend` unit lane.

docs/runbooks/gitea-actions-gotchas.md

@@ -14,6 +14,7 @@ those containers share a filesystem — or a `localhost` — breaks.
 | `docker compose up --wait` is unsupported / flaky | poll health with `docker inspect` | `infra/wait-healthy.sh` |
 | `pg_isready` passes before PostGIS is ready | add a `PostGIS_Version()` probe | the db healthchecks |
 | `upload-artifact@v4` fails ("not supported on GHES") | pin `@v3` | `.gitea/workflows/ci.yaml` (`mutation` job) |
+| `upload-artifact@v3` fails with "Artifact service responded with 500" | mark the upload `continue-on-error: true` (server-side; issue #62) | `.gitea/workflows/ci.yaml` (`mutation` job) |
 
 ---
 
@@ -125,6 +126,22 @@ guard. Inputs are the same (`name`, `path`, `if-no-files-found`), so it is a dro
 swap. Do **not** bump to `@v4` until act_runner advertises github.com-compatible
 artifact support.
 
+**Second failure mode — the server's artifact backend returns 500.** Even on the
+correctly-pinned `@v3`, uploads can fail with:
+
+```
+Create Artifact Container - Attempt 5 of 5 failed with error: Artifact service responded with 500
+::error::Create Artifact Container failed: Artifact service responded with 500
+```
+
+This is the **Gitea server's** artifact storage failing (not the action's GHES guard),
+so it is outside the repo's control. Because the `mutation` job's upload steps run with
+`if: always()`, that 500 would fail the job even though the ratchet passed. **Fix:** mark
+the uploads `continue-on-error: true` (issue #62). The mutation *gate* is the Stryker
+ratchet — `make mutation`'s exit code fails the job on a real regression — so the report
+upload is best-effort: when the server's artifact storage is restored, reports publish
+again with no workflow change.
+
 ---
 
 ## 5. A runner process can't reach a service container's published port

eslint.config.mjs

@@ -0,0 +1,48 @@
+import nx from '@nx/eslint-plugin';
+
+export default [
+  ...nx.configs['flat/base'],
+  ...nx.configs['flat/typescript'],
+  ...nx.configs['flat/javascript'],
+  {
+    ignores: [
+      '**/dist',
+      '**/vite.config.*.timestamp*',
+      '**/vitest.config.*.timestamp*',
+    ],
+  },
+  {
+    files: ['**/*.ts', '**/*.tsx', '**/*.js', '**/*.jsx'],
+    rules: {
+      '@nx/enforce-module-boundaries': [
+        'error',
+        {
+          enforceBuildableLibDependency: true,
+          allow: ['^.*/eslint(\\.base)?\\.config\\.[cm]?[jt]s$'],
+          // Permissive default — apps/libs are untagged for now. Introduce scope/type tags
+          // when the portal set grows (docs/frontend-decisions.md).
+          depConstraints: [
+            {
+              sourceTag: '*',
+              onlyDependOnLibsWithTags: ['*'],
+            },
+          ],
+        },
+      ],
+    },
+  },
+  {
+    files: [
+      '**/*.ts',
+      '**/*.tsx',
+      '**/*.cts',
+      '**/*.mts',
+      '**/*.js',
+      '**/*.jsx',
+      '**/*.cjs',
+      '**/*.mjs',
+    ],
+    // Override or add rules here
+    rules: {},
+  },
+];

infra/docker-compose.local.yml

@@ -305,10 +305,68 @@ services:
       start_period: 10s
     networks: [cg]
 
+  # ── Read projection (S-06) ────────────────────────────────────────────────
+  projection-db:
+    image: docker.io/library/postgres:16
+    environment:
+      POSTGRES_USER: projection
+      POSTGRES_PASSWORD: projection
+      POSTGRES_DB: projection
+    volumes:
+      - projection-db:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U projection -d projection"]
+      interval: 5s
+      timeout: 3s
+      retries: 10
+    networks: [cg]
+
+  event-subscriber:
+    build:
+      context: ..
+      dockerfile: services/event-subscriber/Dockerfile
+    image: register-referentie/event-subscriber:dev
+    environment:
+      ConnectionStrings__Projection: Host=projection-db;Database=projection;Username=projection;Password=projection
+      EventSubscriber__Webhook__AuthToken: ${NOTIFICATION_WEBHOOK_TOKEN:-Bearer big-reference-notifications}
+    ports:
+      - "8110:8080"
+    healthcheck:
+      test: ["CMD", "curl", "-fsS", "http://localhost:8080/health"]
+      interval: 5s
+      timeout: 3s
+      retries: 5
+      start_period: 15s
+    depends_on:
+      projection-db:
+        condition: service_healthy
+    networks: [cg]
+
+  projection-api:
+    build:
+      context: ..
+      dockerfile: services/projection-api/Dockerfile
+    image: register-referentie/projection-api:dev
+    environment:
+      ConnectionStrings__Projection: Host=projection-db;Database=projection;Username=projection;Password=projection
+    ports:
+      - "8120:8080"
+    healthcheck:
+      test: ["CMD", "curl", "-fsS", "http://localhost:8080/health"]
+      interval: 5s
+      timeout: 3s
+      retries: 5
+      start_period: 15s
+    depends_on:
+      projection-db:
+        condition: service_healthy
+    networks: [cg]
+
 volumes:
   oz-db:
   nrc-db:
   flowable-db:
+  projection-db:
 
 networks:
   cg:

infra/docker-compose.yml

@@ -9,6 +9,8 @@
 #   8080  BFF               GET /health → Healthy
 #   8090  Flowable REST     http://localhost:8090/flowable-rest/service/
 #   8100  ACL               GET /health → Healthy  POST /zaken
+#   8110  Event Subscriber  GET /health → Healthy  POST /notifications
+#   8120  projection-api    GET /health → Healthy  GET /register
 #   8180  Keycloak          (admin: admin / admin)
 #
 #   docker compose -f infra/docker-compose.yml up -d --build --wait
@@ -283,7 +285,9 @@ services:
       dockerfile: Dockerfile
     image: register-referentie/acl:dev
     environment:
-      Acl__OpenZaak__BaseUrl: http://openzaak:8000/
+      # Overridable so verify-domain can point the ACL at the same OpenZaak host that
+      # owns the seeded zaaktype URL (host-consistent zaak creation, ADR-0009).
+      Acl__OpenZaak__BaseUrl: ${ACL_OPENZAAK_BASEURL:-http://openzaak:8000/}
       Acl__OpenZaak__ClientId: big-reference-seed
       Acl__OpenZaak__Secret: insecure-dev-secret-change-me
       Acl__Defaults__Bronorganisatie: "517439943"
@@ -304,12 +308,49 @@ services:
         condition: service_healthy
     networks: [cg]
 
+  # ── BIG Domain Service (S-05) ──────────────────────────────────────────────
+  # Orchestrates a registration: POST /registrations creates the aggregate and
+  # starts the registratie Flowable process; a hosted worker acquires the
+  # OpenZaakAanmaken job, opens a zaak via the ACL and completes it (ADR-0009).
+  # Talks only to Flowable (Workflow Client, §8.2) and the ACL (§8.1).
+  domain:
+    build:
+      context: ../services/domain
+      dockerfile: Dockerfile
+    image: register-referentie/domain:dev
+    environment:
+      Flowable__BaseUrl: http://flowable-rest:8080/flowable-rest/
+      Flowable__Username: rest-admin
+      Flowable__Password: test
+      Acl__BaseUrl: http://acl:8080/
+    ports:
+      - "8130:8080"
+    healthcheck:
+      test: ["CMD", "curl", "-fsS", "http://localhost:8080/health"]
+      interval: 5s
+      timeout: 3s
+      retries: 5
+      start_period: 10s
+    depends_on:
+      acl:
+        condition: service_healthy
+      flowable-init:
+        condition: service_completed_successfully
+    networks: [cg]
+
   # ── BFF ──────────────────────────────────────────────────────────────────
   bff:
     build:
       context: ../services/bff
       dockerfile: Dockerfile
     image: register-referentie/bff:dev
+    environment:
+      # The BFF is the portals' only backend; it validates digid tokens and fans out (ADR-0010).
+      # Keycloak (start-dev) derives the issuer from the request host, so the BFF authority and the
+      # verify token request both use keycloak:8080 to keep the issuer consistent.
+      Keycloak__Authority: http://keycloak:8080/realms/digid
+      Downstream__Domain__BaseUrl: http://domain:8080/
+      Downstream__Projection__BaseUrl: http://projection-api:8080/
     ports:
       - "8080:8080"
     healthcheck:
@@ -318,12 +359,110 @@ services:
       timeout: 3s
       retries: 5
       start_period: 10s
+    depends_on:
+      domain:
+        condition: service_healthy
+      projection-api:
+        condition: service_healthy
+      keycloak:
+        condition: service_started
+    networks: [cg]
+
+  # ── Read projection (S-06) ────────────────────────────────────────────────
+  # One Postgres DB backing the rebuildable read projection (PRD §8.4): the Event
+  # Subscriber writes it, projection-api reads it. See ADR-0008.
+  projection-db:
+    image: docker.io/library/postgres:16
+    environment:
+      POSTGRES_USER: projection
+      POSTGRES_PASSWORD: projection
+      POSTGRES_DB: projection
+    volumes:
+      - projection-db:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U projection -d projection"]
+      interval: 5s
+      timeout: 3s
+      retries: 10
+    networks: [cg]
+
+  # Consumes NRC notifications (abonnement callback) and projects zaak-created events
+  # into register_projection. Build context is the repo root: it shares the read model
+  # in services/projection-api/Projection.ReadModel.
+  event-subscriber:
+    build:
+      context: ..
+      dockerfile: services/event-subscriber/Dockerfile
+    image: register-referentie/event-subscriber:dev
+    environment:
+      ConnectionStrings__Projection: Host=projection-db;Database=projection;Username=projection;Password=projection
+      # The bearer Open Notificaties must present on the abonnement callback. NRC's
+      # registration probe expects a 401 without it (ADR-0007). Dev-only token.
+      EventSubscriber__Webhook__AuthToken: ${NOTIFICATION_WEBHOOK_TOKEN:-Bearer big-reference-notifications}
+    ports:
+      - "8110:8080"
+    healthcheck:
+      test: ["CMD", "curl", "-fsS", "http://localhost:8080/health"]
+      interval: 5s
+      timeout: 3s
+      retries: 5
+      start_period: 15s
+    depends_on:
+      projection-db:
+        condition: service_healthy
+    networks: [cg]
+
+  # The read side of the projection. Shares Projection.ReadModel, so build context is root.
+  projection-api:
+    build:
+      context: ..
+      dockerfile: services/projection-api/Dockerfile
+    image: register-referentie/projection-api:dev
+    environment:
+      ConnectionStrings__Projection: Host=projection-db;Database=projection;Username=projection;Password=projection
+    ports:
+      - "8120:8080"
+    healthcheck:
+      test: ["CMD", "curl", "-fsS", "http://localhost:8080/health"]
+      interval: 5s
+      timeout: 3s
+      retries: 5
+      start_period: 15s
+    depends_on:
+      projection-db:
+        condition: service_healthy
+    networks: [cg]
+
+  # ── Self-Service portal (S-08d) ────────────────────────────────────────────
+  # nginx serves the Angular app and reverse-proxies /self-service + /openbaar to the BFF
+  # (same-origin, no CORS). The Playwright e2e drives it inside this network so the DigiD
+  # token issuer (keycloak:8080) matches the BFF's authority (ADR-0010).
+  self-service:
+    build:
+      context: ..
+      dockerfile: apps/self-service/Dockerfile
+    image: register-referentie/self-service:dev
+    ports:
+      - "8140:80"
+    healthcheck:
+      # 127.0.0.1, not localhost: nginx listens on IPv4 only, but localhost resolves to ::1 first.
+      test: ["CMD-SHELL", "wget -q -O /dev/null http://127.0.0.1/ || exit 1"]
+      interval: 5s
+      timeout: 3s
+      retries: 5
+      start_period: 10s
+    depends_on:
+      bff:
+        condition: service_healthy
+      keycloak:
+        condition: service_started
     networks: [cg]
 
 volumes:
   oz-db:
   nrc-db:
   flowable-db:
+  projection-db:
   # Config volumes — created and populated out-of-band by infra/seed-config.sh
   # (docker cp), because bind mounts don't reach sibling containers on the CI
   # runner. `external` keeps the names deterministic; the seed step manages them.

infra/openzaak/seed_catalogus.py

@@ -210,6 +210,10 @@ def main():
     print(f"zaaktypen in BIG: {names}")
     assert "BIG-REGISTRATIE" in names, "BIG-REGISTRATIE not listed"
     state = "published" if PUBLISH else "concept"
+    # Machine-readable line so callers (e.g. infra/run-domain-check.sh) can capture the
+    # zaaktype URL to configure the ACL's default-fill (ADR-0003/0009).
+    zt_url = next(z["url"] for z in zaaktypen if z.get("identificatie") == "BIG-REGISTRATIE")
+    print(f"ZAAKTYPE_URL {zt_url}")
     print(f"OK — BIG catalogus seeded (BIG-REGISTRATIE {state} + bsn eigenschap)")
 
 

infra/run-bff-check.sh

@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+#
+# Verify the BFF end-to-end (S-07) against an ALREADY-RUNNING full stack. The BFF is the portals'
+# only backend (§8.3): it validates Keycloak digid tokens on the self-service submit and serves the
+# openbaar register anonymously with only public-safe fields (ADR-0010).
+#
+# Checks, in-network (services reached by container IP; Keycloak by its service name so the token's
+# host-derived issuer matches the BFF's authority — see the compose bff env and ADR-0010):
+#   1. POST /self-service/registrations without a token            -> 401
+#   2. mint a real digid access token (direct grant) and POST it   -> 202 (forwarded to the domain)
+#   3. GET /openbaar/register (anonymous)                          -> 200 JSON array, never a bsn
+#
+# Does NOT manage the stack lifecycle (the caller owns bring-up + teardown). Plain docker primitives.
+set -euo pipefail
+
+ip() { docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' "$1"; }
+
+bff="$(docker ps -q --filter 'name=[-_]bff[-_]' | head -1)"
+kc="$(docker ps -q --filter 'name=keycloak' | head -1)"
+[ -n "$bff" ] || { echo "ERROR: no running bff container — bring the stack up first" >&2; exit 1; }
+[ -n "$kc" ] || { echo "ERROR: no running keycloak container — bring the stack up first" >&2; exit 1; }
+net="$(docker inspect -f '{{range $k,$_ := .NetworkSettings.Networks}}{{$k}}{{"\n"}}{{end}}' "$bff" | head -1)"
+bff_ip="$(ip "$bff")"
+echo ">> bff=$bff_ip network=$net"
+
+# Helper: run curl inside a throwaway container on the stack network (reaches services by name/IP).
+net_curl() { docker run --rm --network "$net" curlimages/curl:latest "$@"; }
+
+echo ">> 1. self-service submit without a token must be 401"
+code="$(net_curl -s -o /dev/null -w '%{http_code}' -X POST "http://$bff_ip:8080/self-service/registrations" \
+  -H 'Content-Type: application/json' -d '{}')"
+echo "   -> $code"; [ "$code" = "401" ] || { echo "FAIL: expected 401, got $code" >&2; exit 1; }
+
+echo ">> 2. minting a digid token (direct grant) via keycloak:8080 (host-consistent issuer)"
+token=""
+for _ in $(seq 1 20); do
+  token="$(net_curl -s -X POST "http://keycloak:8080/realms/digid/protocol/openid-connect/token" \
+    -H 'Content-Type: application/x-www-form-urlencoded' \
+    --data-urlencode 'grant_type=password' --data-urlencode 'client_id=big-portal' \
+    --data-urlencode 'username=jan-burger' --data-urlencode 'password=test123' \
+    | sed -n 's/.*"access_token":"\([^"]*\)".*/\1/p')"
+  [ -n "$token" ] && break
+  sleep 3
+done
+[ -n "$token" ] || { echo "FAIL: could not obtain a digid access token" >&2; exit 1; }
+echo "   -> got a token"
+
+echo ">> 2b. self-service submit with the token must be 202"
+code="$(net_curl -s -o /dev/null -w '%{http_code}' -X POST "http://$bff_ip:8080/self-service/registrations" \
+  -H "Authorization: Bearer $token" -H 'Content-Type: application/json' -d '{}')"
+echo "   -> $code"; [ "$code" = "202" ] || { echo "FAIL: expected 202, got $code" >&2; docker logs "$bff" 2>&1 | tail -15 >&2; exit 1; }
+
+echo ">> 3. openbaar register (anonymous) must be 200 JSON, never a bsn"
+body="$(net_curl -s "http://$bff_ip:8080/openbaar/register")"
+echo "$body" | grep -q '^\[' || { echo "FAIL: openbaar did not return a JSON array: $body" >&2; exit 1; }
+if echo "$body" | grep -q '"bsn"'; then echo "FAIL: openbaar leaked a bsn field" >&2; exit 1; fi
+
+echo "OK — BFF: 401 without token, 202 with a digid token, anonymous public-safe openbaar register"

infra/run-domain-check.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+#
+# Verify the BIG Domain Service end-to-end (S-05) against an ALREADY-RUNNING full stack:
+# domain → Flowable (start the registratie process + external-task worker) → ACL → OpenZaak.
+# Submits a registration to the domain and asserts the worker opens a zaak in OpenZaak and
+# records its URL on the aggregate (ADR-0009).
+#
+# The seeded zaaktype URL is server-assigned, so it isn't knowable at initial bring-up. This
+# script therefore seeds a published BIG zaaktype and recreates the `acl` service configured to
+# default-fill it — pointing the ACL at the SAME OpenZaak host that owns the URL, so zaak creation
+# is host-consistent (exactly the configuration the ACL integration test proves, ADR-0006). That
+# one recreate aside, the caller owns stack bring-up + teardown.
+#
+# All in-network, reaching services by container IP (a single-label host isn't URL-valid; the
+# runner can't reach published ports — gitea-actions-gotchas.md §5/§6). Plain docker primitives.
+set -euo pipefail
+
+here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+root="$(cd "$here/.." && pwd)"
+compose="$root/infra/docker-compose.yml"
+
+ip() { docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' "$1"; }
+
+oz="$(docker ps -q --filter 'name=[-_]openzaak[-_]' | head -1)"
+dom="$(docker ps -q --filter 'name=domain' | head -1)"
+[ -n "$oz" ] || { echo "ERROR: no running OpenZaak container — bring the stack up first" >&2; exit 1; }
+[ -n "$dom" ] || { echo "ERROR: no running domain container — bring the stack up first" >&2; exit 1; }
+net="$(docker inspect -f '{{range $k,$_ := .NetworkSettings.Networks}}{{$k}}{{"\n"}}{{end}}' "$oz" | head -1)"
+oz_ip="$(ip "$oz")"; dom_ip="$(ip "$dom")"
+oz_base="http://$oz_ip:8000"
+echo ">> openzaak=$oz_ip domain=$dom_ip network=$net"
+
+echo ">> seeding a published BIG zaaktype (idempotent) and capturing its URL"
+sid="$(docker create --network "$net" -e "OZ_BASE=$oz_base" -e OZ_PUBLISH=1 python:3-slim python /seed.py)"
+docker cp "$here/openzaak/seed_catalogus.py" "$sid:/seed.py" >/dev/null
+zt_url="$(docker start -a "$sid" | sed -n 's/^ZAAKTYPE_URL //p' | head -1)"
+docker rm -f "$sid" >/dev/null
+[ -n "$zt_url" ] || { echo "ERROR: seed did not report a ZAAKTYPE_URL" >&2; exit 1; }
+echo ">> zaaktype: $zt_url"
+
+echo ">> recreating the acl service pointed at the seeded zaaktype (host-consistent)"
+ACL_ZAAKTYPE_URL="$zt_url" ACL_OPENZAAK_BASEURL="$oz_base/" docker compose -f "$compose" up -d acl
+WAIT_TIMEOUT="${WAIT_TIMEOUT:-120}" bash "$here/wait-healthy.sh" acl
+
+echo ">> submitting a registration to the domain"
+loc="$(docker run --rm --network "$net" curlimages/curl:latest \
+  -fsS -D - -o /dev/null -X POST "http://$dom_ip:8080/registrations" \
+  -H 'Content-Type: application/json' -d '{"bsn":"123456782"}' \
+  | sed -n 's/\r$//; s/^[Ll]ocation: //p' | head -1)"
+[ -n "$loc" ] || { echo "ERROR: POST /registrations returned no Location" >&2; exit 1; }
+echo ">> registration accepted at $loc"
+
+echo ">> polling the domain until the worker records the opened zaak"
+for _ in $(seq 1 30); do
+  body="$(docker run --rm --network "$net" curlimages/curl:latest \
+    -fsS "http://$dom_ip:8080$loc" 2>/dev/null || true)"
+  if echo "$body" | grep -q '/zaken/api/v1/zaken/'; then
+    echo "OK — the domain opened a zaak and recorded it on the registration:"
+    echo "$body" | cut -c1-300
+    exit 0
+  fi
+  sleep 2
+done
+echo "FAIL — the registration never received a zaak URL" >&2
+echo "--- domain log ---" >&2; docker logs "$dom" 2>&1 | tail -15 >&2
+acl="$(docker ps -q --filter 'name=[-_]acl[-_]' | head -1)"
+[ -n "$acl" ] && { echo "--- acl log ---" >&2; docker logs "$acl" 2>&1 | tail -15 >&2; }
+exit 1

infra/run-e2e-check.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+#
+# Walking-skeleton e2e (S-08d) against an ALREADY-RUNNING full stack: drive the self-service portal
+# in a real browser through mock-DigiD login → submit → confirmation (login → BFF → domain).
+#
+# Runs Playwright INSIDE the compose network (a node container on `cg`), so the browser reaches
+# Keycloak by service name (keycloak:8080) — the same authority the BFF validates against, so the
+# token issuer matches (ADR-0010). The spec is copied into the container (docker cp), not mounted,
+# so it leaves no root-owned files on the host. The caller owns stack bring-up + teardown.
+set -euo pipefail
+
+here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+root="$(cd "$here/.." && pwd)"
+
+ss="$(docker ps -q --filter 'name=self-service' | head -1)"
+[ -n "$ss" ] || { echo "ERROR: no running self-service container — bring the stack up first" >&2; exit 1; }
+net="$(docker inspect -f '{{range $k,$_ := .NetworkSettings.Networks}}{{$k}}{{"\n"}}{{end}}' "$ss" | head -1)"
+echo ">> running Playwright e2e on network $net against http://self-service"
+
+cid="$(docker create --network "$net" -w /e2e --ipc=host \
+  -e SELF_SERVICE_URL=http://self-service \
+  node:24 sh -c 'npm install --no-audit --no-fund && npx playwright install --with-deps chromium && npx playwright test')"
+trap 'docker rm -f "$cid" >/dev/null 2>&1 || true' EXIT
+docker cp "$root/tests/e2e/." "$cid:/e2e" >/dev/null
+docker start -a "$cid"

infra/run-projection-check.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+#
+# Verify the end-to-end read-projection path (S-06) against an ALREADY-RUNNING full stack:
+# OpenZaak → NRC → Event Subscriber → projection → projection-api. Seeds a published BIG
+# zaaktype (idempotent), registers an abonnement on the `zaken` kanaal pointing at the real
+# Event Subscriber's /notifications callback (with the bearer it enforces), creates a zaak,
+# and asserts projection-api serves a row for that zaak with status INGEDIEND.
+#
+# All in-network, reaching services by container IP — single-label hosts aren't URL-valid and
+# the runner can't reach published ports (gitea-actions-gotchas.md §5/§6). Reuses the
+# notification driver to register the abonnement + create the zaak. Does NOT manage the stack
+# lifecycle (the caller owns bring-up + teardown). Plain docker primitives only. See ADR-0007/0008.
+set -euo pipefail
+
+here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+WEBHOOK_AUTH="${NOTIFICATION_WEBHOOK_TOKEN:-Bearer big-reference-notifications}"
+
+cleanup() { docker rm -f rr-pverify rr-pquery >/dev/null 2>&1 || true; }
+trap cleanup EXIT
+
+ip() { docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' "$1"; }
+
+oz="$(docker ps -q --filter 'name=[-_]openzaak[-_]' | head -1)"
+nrc="$(docker ps -q --filter 'name=nrc-web' | head -1)"
+es="$(docker ps -q --filter 'name=event-subscriber' | head -1)"
+proj="$(docker ps -q --filter 'name=projection-api' | head -1)"
+[ -n "$oz" ] && [ -n "$nrc" ] || { echo "ERROR: OpenZaak and/or NRC not running — bring the stack up first" >&2; exit 1; }
+[ -n "$es" ] && [ -n "$proj" ] || { echo "ERROR: event-subscriber and/or projection-api not running — bring the stack up first" >&2; exit 1; }
+net="$(docker inspect -f '{{range $k,$_ := .NetworkSettings.Networks}}{{$k}}{{"\n"}}{{end}}' "$oz" | head -1)"
+oz_ip="$(ip "$oz")"; nrc_ip="$(ip "$nrc")"; es_ip="$(ip "$es")"; proj_ip="$(ip "$proj")"
+echo ">> network=$net openzaak=$oz_ip nrc=$nrc_ip event-subscriber=$es_ip projection-api=$proj_ip"
+
+echo ">> seeding a published BIG zaaktype (idempotent)"
+sid="$(docker create --network "$net" -e "OZ_BASE=http://$oz_ip:8000" -e OZ_PUBLISH=1 \
+  python:3-slim python /seed.py)"
+docker cp "$here/openzaak/seed_catalogus.py" "$sid:/seed.py" >/dev/null
+docker start -a "$sid"
+docker rm -f "$sid" >/dev/null
+
+echo ">> registering abonnement at the Event Subscriber + creating a zaak"
+docker rm -f rr-pverify >/dev/null 2>&1 || true
+drv="$(docker create --network "$net" --name rr-pverify \
+  -e "OZ_BASE=http://$oz_ip:8000" -e "NRC_BASE=http://$nrc_ip:8000" \
+  -e "SINK_CALLBACK=http://$es_ip:8080/notifications" -e "SINK_AUTH=$WEBHOOK_AUTH" \
+  python:3-slim python /driver.py)"
+docker cp "$here/verify-notification-driver.py" "$drv:/driver.py" >/dev/null
+docker start -a "$drv"
+zaak_url="$(docker logs rr-pverify 2>/dev/null | sed -n 's/^ZAAK_CREATED //p' | head -1)"
+docker rm -f rr-pverify >/dev/null
+[ -n "$zaak_url" ] || { echo "ERROR: driver did not create a zaak" >&2; exit 1; }
+zaak_uuid="${zaak_url##*/}"
+echo ">> zaak created: $zaak_url"
+
+echo ">> polling projection-api for the projected row (status INGEDIEND)"
+for _ in $(seq 1 30); do
+  body="$(docker run --rm --network "$net" curlimages/curl:latest \
+    -fsS "http://$proj_ip:8080/register/$zaak_uuid" 2>/dev/null || true)"
+  if echo "$body" | grep -q '"INGEDIEND"'; then
+    echo "OK — projection-api serves zaak $zaak_uuid with status INGEDIEND"
+    echo "$body" | cut -c1-300
+    exit 0
+  fi
+  sleep 2
+done
+echo "FAIL — projection-api never served an INGEDIEND row for zaak $zaak_uuid" >&2
+echo "--- event-subscriber log ---" >&2; docker logs "$es" 2>&1 | tail -10 >&2
+echo "--- projection-api log ---" >&2; docker logs "$proj" 2>&1 | tail -10 >&2
+exit 1

libs/api-client/README.md

@@ -0,0 +1,7 @@
+# api-client
+
+This library was generated with [Nx](https://nx.dev).
+
+## Running unit tests
+
+Run `nx test api-client` to execute the unit tests.

libs/api-client/eslint.config.mjs

@@ -0,0 +1,34 @@
+import nx from '@nx/eslint-plugin';
+import baseConfig from '../../eslint.config.mjs';
+
+export default [
+  ...nx.configs['flat/angular'],
+  ...nx.configs['flat/angular-template'],
+  ...baseConfig,
+  {
+    files: ['**/*.ts'],
+    rules: {
+      '@angular-eslint/directive-selector': [
+        'error',
+        {
+          type: 'attribute',
+          prefix: 'lib',
+          style: 'camelCase',
+        },
+      ],
+      '@angular-eslint/component-selector': [
+        'error',
+        {
+          type: 'element',
+          prefix: 'lib',
+          style: 'kebab-case',
+        },
+      ],
+    },
+  },
+  {
+    files: ['**/*.html'],
+    // Override or add rules here
+    rules: {},
+  },
+];

libs/api-client/orval.config.ts

@@ -0,0 +1,17 @@
+import { defineConfig } from 'orval';
+
+// Generates the BFF client (Angular HttpClient service + models) from the committed
+// OpenAPI contract. Never hand-edit the generated output — re-run `nx run api-client:generate`
+// after the BFF spec changes (CLAUDE.md §10; docs/frontend-decisions.md).
+export default defineConfig({
+  bff: {
+    input: '../../services/bff/openapi.json',
+    output: {
+      target: './src/lib/generated/bff-api.ts',
+      client: 'angular',
+      mode: 'single',
+      clean: true,
+      prettier: true,
+    },
+  },
+});

libs/api-client/project.json

@@ -0,0 +1,20 @@
+{
+  "name": "api-client",
+  "$schema": "../../node_modules/nx/schemas/project-schema.json",
+  "sourceRoot": "libs/api-client/src",
+  "prefix": "lib",
+  "projectType": "library",
+  "tags": [],
+  "targets": {
+    "lint": {
+      "executor": "@nx/eslint:lint"
+    },
+    "generate": {
+      "executor": "nx:run-commands",
+      "options": {
+        "command": "orval --config orval.config.ts",
+        "cwd": "libs/api-client"
+      }
+    }
+  }
+}

libs/api-client/src/index.ts

@@ -0,0 +1,3 @@
+// The BFF API client is generated from services/bff/openapi.json (orval); never hand-edit
+// src/lib/generated. Re-run `nx run api-client:generate` after the BFF spec changes.
+export * from './lib/generated/bff-api';

libs/api-client/src/lib/bff-api.spec.ts

@@ -0,0 +1,50 @@
+import { provideHttpClient } from '@angular/common/http';
+import {
+  HttpTestingController,
+  provideHttpClientTesting,
+} from '@angular/common/http/testing';
+import { TestBed } from '@angular/core/testing';
+import {
+  BffApiV1Service,
+  type OpenbaarEntry,
+  type SubmitAccepted,
+} from '../index';
+
+describe('BffApiV1Service (generated from services/bff/openapi.json)', () => {
+  let service: BffApiV1Service;
+  let http: HttpTestingController;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [provideHttpClient(), provideHttpClientTesting()],
+    });
+    service = TestBed.inject(BffApiV1Service);
+    http = TestBed.inject(HttpTestingController);
+  });
+
+  afterEach(() => http.verify());
+
+  it('submits a registration via POST /self-service/registrations', () => {
+    let result: SubmitAccepted | undefined;
+    service.postSelfServiceRegistrations().subscribe((r) => (result = r));
+
+    const req = http.expectOne('/self-service/registrations');
+    expect(req.request.method).toBe('POST');
+    req.flush({ registrationId: 'reg-1', status: 'Ingediend' });
+
+    expect(result?.registrationId).toBe('reg-1');
+    expect(result?.status).toBe('Ingediend');
+  });
+
+  it('reads the openbaar register via GET /openbaar/register with the query', () => {
+    let rows: OpenbaarEntry[] | undefined;
+    service.getOpenbaarRegister({ q: 'abc' }).subscribe((r) => (rows = r));
+
+    const req = http.expectOne((r) => r.url === '/openbaar/register');
+    expect(req.request.method).toBe('GET');
+    expect(req.request.params.get('q')).toBe('abc');
+    req.flush([{ id: 'abc-111', status: 'INGEDIEND' }]);
+
+    expect(rows?.[0].id).toBe('abc-111');
+  });
+});

libs/api-client/src/lib/generated/bff-api.ts

@@ -0,0 +1,216 @@
+/**
+ * Generated by orval v8.19.0 🍺
+ * Do not edit manually.
+ * Bff.Api | v1
+ * OpenAPI spec version: 1.0.0
+ */
+import {
+  HttpClient,
+  HttpHeaders,
+  HttpResponse as AngularHttpResponse
+} from '@angular/common/http';
+import type {
+  HttpContext,
+  HttpEvent,
+  HttpParams
+} from '@angular/common/http';
+
+import {
+  Injectable,
+  inject
+} from '@angular/core';
+
+import {
+  Observable
+} from 'rxjs';
+
+export interface OpenbaarEntry {
+  id: string;
+  status: string;
+}
+
+export interface SubmitAccepted {
+  registrationId: string;
+  status: string;
+}
+
+export type GetOpenbaarRegisterParams = {
+q?: string;
+};
+
+interface HttpClientOptions {
+  readonly headers?: HttpHeaders | Record<string, string | string[]>;
+  readonly context?: HttpContext;
+  readonly params?:
+        | HttpParams
+      | Record<string, string | number | boolean | Array<string | number | boolean>>;
+  readonly reportProgress?: boolean;
+  readonly withCredentials?: boolean;
+  readonly credentials?: RequestCredentials;
+  readonly keepalive?: boolean;
+  readonly priority?: RequestPriority;
+  readonly cache?: RequestCache;
+  readonly mode?: RequestMode;
+  readonly redirect?: RequestRedirect;
+  readonly referrer?: string;
+  readonly integrity?: string;
+  readonly referrerPolicy?: ReferrerPolicy;
+  readonly transferCache?: {includeHeaders?: string[]} | boolean;
+  readonly timeout?: number;
+}
+
+type HttpClientBodyOptions = HttpClientOptions & {
+  readonly observe?: 'body';
+};
+
+type HttpClientEventOptions = HttpClientOptions & {
+  readonly observe: 'events';
+};
+
+type HttpClientResponseOptions = HttpClientOptions & {
+  readonly observe: 'response';
+};
+
+type HttpClientObserveOptions = HttpClientOptions & {
+  readonly observe?: 'body' | 'events' | 'response';
+};
+
+type AngularHttpParamValue = string | number | boolean | Array<string | number | boolean>;
+type AngularHttpParamValueWithNullable = AngularHttpParamValue | null;
+
+function filterParams(
+  params: Record<string, unknown>,
+  requiredNullableKeys?: ReadonlySet<string>,
+  preserveRequiredNullables?: false,
+  passthroughKeys?: undefined,
+): Record<string, AngularHttpParamValue>;
+function filterParams(
+  params: Record<string, unknown>,
+  requiredNullableKeys: ReadonlySet<string> | undefined,
+  preserveRequiredNullables: true,
+  passthroughKeys?: undefined,
+): Record<string, AngularHttpParamValueWithNullable>;
+function filterParams(
+  params: Record<string, unknown>,
+  requiredNullableKeys: ReadonlySet<string> | undefined,
+  preserveRequiredNullables: boolean | undefined,
+  passthroughKeys: ReadonlySet<string>,
+): Record<string, unknown>;
+function filterParams(
+  params: Record<string, unknown>,
+  requiredNullableKeys: ReadonlySet<string> = new Set(),
+  preserveRequiredNullables = false,
+  passthroughKeys: ReadonlySet<string> = new Set(),
+): Record<string, unknown> {
+  const filteredParams: Record<string, unknown> = {};
+  for (const [key, value] of Object.entries(params)) {
+    if (passthroughKeys.has(key)) {
+      if (value !== undefined) {
+        filteredParams[key] = value;
+      }
+      continue;
+    }
+    if (Array.isArray(value)) {
+      const filtered = value.filter(
+        (item) =>
+          item != null &&
+          (typeof item === 'string' ||
+            typeof item === 'number' ||
+            typeof item === 'boolean'),
+      ) as Array<string | number | boolean>;
+      if (filtered.length) {
+        filteredParams[key] = filtered;
+      }
+    } else if (
+      preserveRequiredNullables &&
+      value === null &&
+      requiredNullableKeys.has(key)
+    ) {
+      filteredParams[key] = null;
+    } else if (
+      value != null &&
+      (typeof value === 'string' ||
+        typeof value === 'number' ||
+        typeof value === 'boolean')
+    ) {
+      filteredParams[key] = value;
+    }
+  }
+  return filteredParams;
+}
+
+
+
+
+
+@Injectable({ providedIn: 'root' })
+export class BffApiV1Service {
+  private readonly http = inject(HttpClient);
+ postSelfServiceRegistrations<TData = SubmitAccepted>( options?: HttpClientBodyOptions): Observable<TData>;
+ postSelfServiceRegistrations<TData = SubmitAccepted>( options?: HttpClientEventOptions): Observable<HttpEvent<TData>>;
+ postSelfServiceRegistrations<TData = SubmitAccepted>( options?: HttpClientResponseOptions): Observable<AngularHttpResponse<TData>>;
+  postSelfServiceRegistrations<TData = SubmitAccepted>(
+     options?: HttpClientObserveOptions): Observable<TData | HttpEvent<TData> | AngularHttpResponse<TData>> {
+    if (options?.observe === 'events') {
+      return this.http.post<TData>(
+      `/self-service/registrations`,
+      undefined,{
+        ...(options as Omit<NonNullable<typeof options>, 'observe'>),
+        observe: 'events',
+      }
+    );
+    }
+
+    if (options?.observe === 'response') {
+      return this.http.post<TData>(
+      `/self-service/registrations`,
+      undefined,{
+        ...(options as Omit<NonNullable<typeof options>, 'observe'>),
+        observe: 'response',
+      }
+    );
+    }
+
+    return this.http.post<TData>(
+      `/self-service/registrations`,
+      undefined,{
+        ...(options as Omit<NonNullable<typeof options>, 'observe'>),
+        observe: 'body',
+      }
+    );
+  }
+
+ getOpenbaarRegister<TData = OpenbaarEntry[]>(params?: GetOpenbaarRegisterParams, options?: HttpClientBodyOptions): Observable<TData>;
+ getOpenbaarRegister<TData = OpenbaarEntry[]>(params?: GetOpenbaarRegisterParams, options?: HttpClientEventOptions): Observable<HttpEvent<TData>>;
+ getOpenbaarRegister<TData = OpenbaarEntry[]>(params?: GetOpenbaarRegisterParams, options?: HttpClientResponseOptions): Observable<AngularHttpResponse<TData>>;
+  getOpenbaarRegister<TData = OpenbaarEntry[]>(
+    params?: GetOpenbaarRegisterParams, options?: HttpClientObserveOptions): Observable<TData | HttpEvent<TData> | AngularHttpResponse<TData>> {
+    const filteredParams = filterParams({...params, ...options?.params}, new Set<string>([]));
+
+    if (options?.observe === 'events') {
+      return this.http.get<TData>(
+      `/openbaar/register`,{
+    ...(options as Omit<NonNullable<typeof options>, 'observe'>),
+        observe: 'events',
+        params: filteredParams,}
+    );
+    }
+
+    if (options?.observe === 'response') {
+      return this.http.get<TData>(
+      `/openbaar/register`,{
+    ...(options as Omit<NonNullable<typeof options>, 'observe'>),
+        observe: 'response',
+        params: filteredParams,}
+    );
+    }
+
+    return this.http.get<TData>(
+      `/openbaar/register`,{
+    ...(options as Omit<NonNullable<typeof options>, 'observe'>),
+        observe: 'body',
+        params: filteredParams,}
+    );
+  }
+
+};

libs/api-client/src/test-setup.ts

@@ -0,0 +1,5 @@
+import '@angular/compiler';
+import '@analogjs/vitest-angular/setup-snapshots';
+import { setupTestBed } from '@analogjs/vitest-angular/setup-testbed';
+
+setupTestBed({ zoneless: false });

libs/api-client/tsconfig.json

@@ -0,0 +1,31 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "isolatedModules": true,
+    "target": "es2022",
+    "moduleResolution": "bundler",
+    "strict": true,
+    "noImplicitOverride": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "emitDecoratorMetadata": false,
+    "module": "preserve"
+  },
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictTemplates": true
+  },
+  "files": [],
+  "include": [],
+  "references": [
+    {
+      "path": "./tsconfig.lib.json"
+    },
+    {
+      "path": "./tsconfig.spec.json"
+    }
+  ]
+}

libs/api-client/tsconfig.lib.json

@@ -0,0 +1,26 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../dist/out-tsc",
+    "declaration": true,
+    "declarationMap": true,
+    "inlineSources": true,
+    "types": []
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": [
+    "src/**/*.spec.ts",
+    "src/**/*.test.ts",
+    "vite.config.ts",
+    "vite.config.mts",
+    "vitest.config.ts",
+    "vitest.config.mts",
+    "src/**/*.test.tsx",
+    "src/**/*.spec.tsx",
+    "src/**/*.test.js",
+    "src/**/*.spec.js",
+    "src/**/*.test.jsx",
+    "src/**/*.spec.jsx",
+    "src/test-setup.ts"
+  ]
+}

libs/api-client/tsconfig.spec.json

@@ -0,0 +1,29 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../dist/out-tsc",
+    "types": [
+      "vitest/globals",
+      "vitest/importMeta",
+      "vite/client",
+      "node",
+      "vitest"
+    ]
+  },
+  "include": [
+    "vite.config.ts",
+    "vite.config.mts",
+    "vitest.config.ts",
+    "vitest.config.mts",
+    "src/**/*.test.ts",
+    "src/**/*.spec.ts",
+    "src/**/*.test.tsx",
+    "src/**/*.spec.tsx",
+    "src/**/*.test.js",
+    "src/**/*.spec.js",
+    "src/**/*.test.jsx",
+    "src/**/*.spec.jsx",
+    "src/**/*.d.ts"
+  ],
+  "files": ["src/test-setup.ts"]
+}

libs/api-client/vite.config.mts

@@ -0,0 +1,28 @@
+/// <reference types='vitest' />
+import { defineConfig } from 'vite';
+import angular from '@analogjs/vite-plugin-angular';
+import { nxViteTsPaths } from '@nx/vite/plugins/nx-tsconfig-paths.plugin';
+import { nxCopyAssetsPlugin } from '@nx/vite/plugins/nx-copy-assets.plugin';
+
+export default defineConfig(() => ({
+  root: __dirname,
+  cacheDir: '../../node_modules/.vite/libs/api-client',
+  plugins: [angular(), nxViteTsPaths(), nxCopyAssetsPlugin(['*.md'])],
+  // Uncomment this if you are using workers.
+  // worker: {
+  //   plugins: () => [ nxViteTsPaths() ],
+  // },
+  test: {
+    name: 'api-client',
+    watch: false,
+    globals: true,
+    environment: 'jsdom',
+    include: ['{src,tests}/**/*.{test,spec}.{js,mjs,cjs,ts,mts,cts,jsx,tsx}'],
+    setupFiles: ['src/test-setup.ts'],
+    reporters: ['default'],
+    coverage: {
+      reportsDirectory: '../../coverage/libs/api-client',
+      provider: 'v8' as const,
+    },
+  },
+}));

libs/auth/README.md

@@ -0,0 +1,7 @@
+# auth
+
+This library was generated with [Nx](https://nx.dev).
+
+## Running unit tests
+
+Run `nx test auth` to execute the unit tests.

libs/auth/eslint.config.mjs

@@ -0,0 +1,34 @@
+import nx from '@nx/eslint-plugin';
+import baseConfig from '../../eslint.config.mjs';
+
+export default [
+  ...nx.configs['flat/angular'],
+  ...nx.configs['flat/angular-template'],
+  ...baseConfig,
+  {
+    files: ['**/*.ts'],
+    rules: {
+      '@angular-eslint/directive-selector': [
+        'error',
+        {
+          type: 'attribute',
+          prefix: 'lib',
+          style: 'camelCase',
+        },
+      ],
+      '@angular-eslint/component-selector': [
+        'error',
+        {
+          type: 'element',
+          prefix: 'lib',
+          style: 'kebab-case',
+        },
+      ],
+    },
+  },
+  {
+    files: ['**/*.html'],
+    // Override or add rules here
+    rules: {},
+  },
+];

libs/auth/project.json

@@ -0,0 +1,13 @@
+{
+  "name": "auth",
+  "$schema": "../../node_modules/nx/schemas/project-schema.json",
+  "sourceRoot": "libs/auth/src",
+  "prefix": "lib",
+  "projectType": "library",
+  "tags": [],
+  "targets": {
+    "lint": {
+      "executor": "@nx/eslint:lint"
+    }
+  }
+}

libs/auth/src/index.ts

@@ -0,0 +1,4 @@
+export * from './lib/auth.service';
+export * from './lib/digid-auth.service';
+export * from './lib/digid-auth.providers';
+export * from './lib/authenticated.guard';

libs/auth/src/lib/auth.service.ts

@@ -0,0 +1,16 @@
+import { Signal } from '@angular/core';
+
+/**
+ * The portal's view of the signed-in user. An abstraction over the OIDC library so components and
+ * guards depend on a small, mockable surface (the real implementation is DigiadAuthService).
+ */
+export abstract class AuthService {
+  /** Whether a DigiD session is active. */
+  abstract readonly isAuthenticated: Signal<boolean>;
+  /** The citizen-service number from the DigiD token, once authenticated. */
+  abstract readonly bsn: Signal<string | undefined>;
+  /** Start the DigiD login (redirects to Keycloak). */
+  abstract login(): void;
+  /** End the session. */
+  abstract logout(): void;
+}

libs/auth/src/lib/authenticated.guard.spec.ts

@@ -0,0 +1,42 @@
+import { signal } from '@angular/core';
+import { TestBed } from '@angular/core/testing';
+import { AuthService } from './auth.service';
+import { authenticatedGuard } from './authenticated.guard';
+
+class FakeAuth extends AuthService {
+  readonly isAuthenticated = signal(false);
+  readonly bsn = signal<string | undefined>(undefined);
+  login(): void {
+    /* spied in tests */
+  }
+  logout(): void {
+    /* noop */
+  }
+}
+
+function runGuard(authenticated: boolean) {
+  const auth = new FakeAuth();
+  auth.isAuthenticated.set(authenticated);
+  const loginSpy = vi.spyOn(auth, 'login');
+  TestBed.configureTestingModule({
+    providers: [{ provide: AuthService, useValue: auth }],
+  });
+  const result = TestBed.runInInjectionContext(() =>
+    authenticatedGuard(null as never, null as never),
+  );
+  return { result, loginSpy };
+}
+
+describe('authenticatedGuard', () => {
+  it('allows the route for an authenticated user', () => {
+    const { result, loginSpy } = runGuard(true);
+    expect(result).toBe(true);
+    expect(loginSpy).not.toHaveBeenCalled();
+  });
+
+  it('blocks and starts DigiD login when not authenticated', () => {
+    const { result, loginSpy } = runGuard(false);
+    expect(result).toBe(false);
+    expect(loginSpy).toHaveBeenCalledTimes(1);
+  });
+});

libs/auth/src/lib/authenticated.guard.ts

@@ -0,0 +1,13 @@
+import { inject } from '@angular/core';
+import { CanActivateFn } from '@angular/router';
+import { AuthService } from './auth.service';
+
+/** Allow the route only when a DigiD session is active; otherwise start the login. */
+export const authenticatedGuard: CanActivateFn = () => {
+  const auth = inject(AuthService);
+  if (auth.isAuthenticated()) {
+    return true;
+  }
+  auth.login();
+  return false;
+};

libs/auth/src/lib/digid-auth.providers.ts

@@ -0,0 +1,55 @@
+import { EnvironmentProviders, makeEnvironmentProviders } from '@angular/core';
+import {
+  authInterceptor,
+  LogLevel,
+  provideAuth,
+  withAppInitializerAuthCheck,
+} from 'angular-auth-oidc-client';
+import { AuthService } from './auth.service';
+import { DigiadAuthService } from './digid-auth.service';
+
+export interface DigiadAuthOptions {
+  /** The Keycloak `digid` realm issuer, as reachable from the browser. */
+  authority: string;
+  /** Where Keycloak redirects back to after login (usually the app origin). */
+  redirectUrl: string;
+  /**
+   * Route prefixes whose requests get the bearer token attached. The api-client calls the BFF with
+   * **relative** URLs (same-origin via the nginx proxy), so these must be relative path prefixes
+   * (e.g. `/self-service/`) — angular-auth-oidc-client matches `req.url.startsWith(route)`, and a
+   * relative `req.url` never starts with an absolute origin.
+   */
+  secureRoutes: string[];
+}
+
+/**
+ * Configure DigiD login (Keycloak `digid` realm, public client `big-portal`, auth-code + PKCE) and
+ * bind {@link AuthService} to the OIDC-backed implementation. Register {@link authInterceptor} in the
+ * app's HttpClient so BFF calls carry the token.
+ */
+export function provideDigiadAuth(options: DigiadAuthOptions): EnvironmentProviders {
+  return makeEnvironmentProviders([
+    provideAuth(
+      {
+        config: {
+          authority: options.authority,
+          redirectUrl: options.redirectUrl,
+          postLogoutRedirectUri: options.redirectUrl,
+          clientId: 'big-portal',
+          scope: 'openid profile',
+          responseType: 'code',
+          silentRenew: true,
+          useRefreshToken: true,
+          secureRoutes: options.secureRoutes,
+          logLevel: LogLevel.Warn,
+        },
+      },
+      // Run checkAuth() at startup so the DigiD callback (?code=…) is processed before the router
+      // and guard run — without it the guard sees "not authenticated" and re-triggers login (loop).
+      withAppInitializerAuthCheck(),
+    ),
+    { provide: AuthService, useClass: DigiadAuthService },
+  ]);
+}
+
+export { authInterceptor };

libs/auth/src/lib/digid-auth.service.ts

@@ -0,0 +1,29 @@
+import { inject, Injectable, Signal } from '@angular/core';
+import { toSignal } from '@angular/core/rxjs-interop';
+import { OidcSecurityService } from 'angular-auth-oidc-client';
+import { map } from 'rxjs';
+import { AuthService } from './auth.service';
+
+/** DigiD-backed AuthService over angular-auth-oidc-client (Keycloak `digid` realm). */
+@Injectable()
+export class DigiadAuthService extends AuthService {
+  private readonly oidc = inject(OidcSecurityService);
+
+  readonly isAuthenticated: Signal<boolean> = toSignal(
+    this.oidc.isAuthenticated$.pipe(map((result) => result.isAuthenticated)),
+    { initialValue: false },
+  );
+
+  readonly bsn: Signal<string | undefined> = toSignal(
+    this.oidc.userData$.pipe(map((data) => (data.userData as { bsn?: string } | null)?.bsn)),
+    { initialValue: undefined },
+  );
+
+  override login(): void {
+    this.oidc.authorize();
+  }
+
+  override logout(): void {
+    this.oidc.logoff().subscribe();
+  }
+}

libs/auth/src/test-setup.ts

@@ -0,0 +1,5 @@
+import '@angular/compiler';
+import '@analogjs/vitest-angular/setup-snapshots';
+import { setupTestBed } from '@analogjs/vitest-angular/setup-testbed';
+
+setupTestBed({ zoneless: false });

libs/auth/tsconfig.json

@@ -0,0 +1,31 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "isolatedModules": true,
+    "target": "es2022",
+    "moduleResolution": "bundler",
+    "strict": true,
+    "noImplicitOverride": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "emitDecoratorMetadata": false,
+    "module": "preserve"
+  },
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictTemplates": true
+  },
+  "files": [],
+  "include": [],
+  "references": [
+    {
+      "path": "./tsconfig.lib.json"
+    },
+    {
+      "path": "./tsconfig.spec.json"
+    }
+  ]
+}

libs/auth/tsconfig.lib.json

@@ -0,0 +1,26 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../dist/out-tsc",
+    "declaration": true,
+    "declarationMap": true,
+    "inlineSources": true,
+    "types": []
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": [
+    "src/**/*.spec.ts",
+    "src/**/*.test.ts",
+    "vite.config.ts",
+    "vite.config.mts",
+    "vitest.config.ts",
+    "vitest.config.mts",
+    "src/**/*.test.tsx",
+    "src/**/*.spec.tsx",
+    "src/**/*.test.js",
+    "src/**/*.spec.js",
+    "src/**/*.test.jsx",
+    "src/**/*.spec.jsx",
+    "src/test-setup.ts"
+  ]
+}

libs/auth/tsconfig.spec.json

@@ -0,0 +1,29 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../dist/out-tsc",
+    "types": [
+      "vitest/globals",
+      "vitest/importMeta",
+      "vite/client",
+      "node",
+      "vitest"
+    ]
+  },
+  "include": [
+    "vite.config.ts",
+    "vite.config.mts",
+    "vitest.config.ts",
+    "vitest.config.mts",
+    "src/**/*.test.ts",
+    "src/**/*.spec.ts",
+    "src/**/*.test.tsx",
+    "src/**/*.spec.tsx",
+    "src/**/*.test.js",
+    "src/**/*.spec.js",
+    "src/**/*.test.jsx",
+    "src/**/*.spec.jsx",
+    "src/**/*.d.ts"
+  ],
+  "files": ["src/test-setup.ts"]
+}

libs/auth/vite.config.mts

@@ -0,0 +1,28 @@
+/// <reference types='vitest' />
+import { defineConfig } from 'vite';
+import angular from '@analogjs/vite-plugin-angular';
+import { nxViteTsPaths } from '@nx/vite/plugins/nx-tsconfig-paths.plugin';
+import { nxCopyAssetsPlugin } from '@nx/vite/plugins/nx-copy-assets.plugin';
+
+export default defineConfig(() => ({
+  root: __dirname,
+  cacheDir: '../../node_modules/.vite/libs/auth',
+  plugins: [angular(), nxViteTsPaths(), nxCopyAssetsPlugin(['*.md'])],
+  // Uncomment this if you are using workers.
+  // worker: {
+  //   plugins: () => [ nxViteTsPaths() ],
+  // },
+  test: {
+    name: 'auth',
+    watch: false,
+    globals: true,
+    environment: 'jsdom',
+    include: ['{src,tests}/**/*.{test,spec}.{js,mjs,cjs,ts,mts,cts,jsx,tsx}'],
+    setupFiles: ['src/test-setup.ts'],
+    reporters: ['default'],
+    coverage: {
+      reportsDirectory: '../../coverage/libs/auth',
+      provider: 'v8' as const,
+    },
+  },
+}));

libs/ui/README.md

@@ -0,0 +1,7 @@
+# ui
+
+This library was generated with [Nx](https://nx.dev).
+
+## Running unit tests
+
+Run `nx test ui` to execute the unit tests.

libs/ui/eslint.config.mjs

@@ -0,0 +1,34 @@
+import nx from '@nx/eslint-plugin';
+import baseConfig from '../../eslint.config.mjs';
+
+export default [
+  ...nx.configs['flat/angular'],
+  ...nx.configs['flat/angular-template'],
+  ...baseConfig,
+  {
+    files: ['**/*.ts'],
+    rules: {
+      '@angular-eslint/directive-selector': [
+        'error',
+        {
+          type: 'attribute',
+          prefix: 'lib',
+          style: 'camelCase',
+        },
+      ],
+      '@angular-eslint/component-selector': [
+        'error',
+        {
+          type: 'element',
+          prefix: 'lib',
+          style: 'kebab-case',
+        },
+      ],
+    },
+  },
+  {
+    files: ['**/*.html'],
+    // Override or add rules here
+    rules: {},
+  },
+];

libs/ui/project.json

@@ -0,0 +1,13 @@
+{
+  "name": "ui",
+  "$schema": "../../node_modules/nx/schemas/project-schema.json",
+  "sourceRoot": "libs/ui/src",
+  "prefix": "lib",
+  "projectType": "library",
+  "tags": [],
+  "targets": {
+    "lint": {
+      "executor": "@nx/eslint:lint"
+    }
+  }
+}

libs/ui/src/index.ts

@@ -0,0 +1,11 @@
+// NL Design System building blocks — Utrecht is NL DS's reference Angular implementation
+// (docs/frontend-decisions.md). The portals depend on the design system through this one lib.
+// The design tokens/theme CSS is imported once, at the app level (apps/*/src/styles.css).
+//
+// The Utrecht v3 components are NgModule-based (not standalone), so we re-export the module.
+// A standalone component consumes them by importing UtrechtComponentsModule in its `imports`
+// (CLAUDE.md §10 forbids *declaring* NgModules in our code, not consuming a third-party one).
+// Re-export the whole Utrecht package: importing UtrechtComponentsModule pulls every component it
+// exports into the compiler's scope, so the AOT build needs all of them resolvable through this
+// barrel (a partial re-export fails with NG3004 for the first unused component).
+export * from '@utrecht/component-library-angular';

libs/ui/src/lib/ui.spec.ts

@@ -0,0 +1,7 @@
+import { UtrechtComponentsModule } from '../index';
+
+describe('ui barrel', () => {
+  it('re-exports the NL Design System (Utrecht) module', () => {
+    expect(UtrechtComponentsModule).toBeTruthy();
+  });
+});

libs/ui/src/test-setup.ts

@@ -0,0 +1,5 @@
+import '@angular/compiler';
+import '@analogjs/vitest-angular/setup-snapshots';
+import { setupTestBed } from '@analogjs/vitest-angular/setup-testbed';
+
+setupTestBed({ zoneless: false });

libs/ui/tsconfig.json

@@ -0,0 +1,31 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "isolatedModules": true,
+    "target": "es2022",
+    "moduleResolution": "bundler",
+    "strict": true,
+    "noImplicitOverride": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "emitDecoratorMetadata": false,
+    "module": "preserve"
+  },
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictTemplates": true
+  },
+  "files": [],
+  "include": [],
+  "references": [
+    {
+      "path": "./tsconfig.lib.json"
+    },
+    {
+      "path": "./tsconfig.spec.json"
+    }
+  ]
+}

libs/ui/tsconfig.lib.json

@@ -0,0 +1,26 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../dist/out-tsc",
+    "declaration": true,
+    "declarationMap": true,
+    "inlineSources": true,
+    "types": []
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": [
+    "src/**/*.spec.ts",
+    "src/**/*.test.ts",
+    "vite.config.ts",
+    "vite.config.mts",
+    "vitest.config.ts",
+    "vitest.config.mts",
+    "src/**/*.test.tsx",
+    "src/**/*.spec.tsx",
+    "src/**/*.test.js",
+    "src/**/*.spec.js",
+    "src/**/*.test.jsx",
+    "src/**/*.spec.jsx",
+    "src/test-setup.ts"
+  ]
+}

libs/ui/tsconfig.spec.json

@@ -0,0 +1,29 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../dist/out-tsc",
+    "types": [
+      "vitest/globals",
+      "vitest/importMeta",
+      "vite/client",
+      "node",
+      "vitest"
+    ]
+  },
+  "include": [
+    "vite.config.ts",
+    "vite.config.mts",
+    "vitest.config.ts",
+    "vitest.config.mts",
+    "src/**/*.test.ts",
+    "src/**/*.spec.ts",
+    "src/**/*.test.tsx",
+    "src/**/*.spec.tsx",
+    "src/**/*.test.js",
+    "src/**/*.spec.js",
+    "src/**/*.test.jsx",
+    "src/**/*.spec.jsx",
+    "src/**/*.d.ts"
+  ],
+  "files": ["src/test-setup.ts"]
+}

libs/ui/vite.config.mts

@@ -0,0 +1,28 @@
+/// <reference types='vitest' />
+import { defineConfig } from 'vite';
+import angular from '@analogjs/vite-plugin-angular';
+import { nxViteTsPaths } from '@nx/vite/plugins/nx-tsconfig-paths.plugin';
+import { nxCopyAssetsPlugin } from '@nx/vite/plugins/nx-copy-assets.plugin';
+
+export default defineConfig(() => ({
+  root: __dirname,
+  cacheDir: '../../node_modules/.vite/libs/ui',
+  plugins: [angular(), nxViteTsPaths(), nxCopyAssetsPlugin(['*.md'])],
+  // Uncomment this if you are using workers.
+  // worker: {
+  //   plugins: () => [ nxViteTsPaths() ],
+  // },
+  test: {
+    name: 'ui',
+    watch: false,
+    globals: true,
+    environment: 'jsdom',
+    include: ['{src,tests}/**/*.{test,spec}.{js,mjs,cjs,ts,mts,cts,jsx,tsx}'],
+    setupFiles: ['src/test-setup.ts'],
+    reporters: ['default'],
+    coverage: {
+      reportsDirectory: '../../coverage/libs/ui',
+      provider: 'v8' as const,
+    },
+  },
+}));

mkdocs.yml

@@ -29,7 +29,12 @@ nav:
       - "ADR-0005: Mutation testing": architecture/adr-0005-mutation-testing.md
       - "ADR-0006: ACL integration test provisioning": architecture/adr-0006-integration-test-provisioning.md
       - "ADR-0007: OpenZaak → NRC notification wiring": architecture/adr-0007-notification-wiring.md
+      - "ADR-0008: Read projection store": architecture/adr-0008-read-projection-store.md
+      - "ADR-0009: External-task job worker": architecture/adr-0009-external-task-job-worker.md
+      - "ADR-0010: BFF OIDC validation": architecture/adr-0010-bff-oidc.md
   - Working in Gitea: gitea-workflow.md
+  - Frontend decisions: frontend-decisions.md
+  - Demo script: demo-script.md
   - Runbooks:
       - CI: runbooks/ci.md
 

nx.json

@@ -0,0 +1,120 @@
+{
+  "$schema": "./node_modules/nx/schemas/nx-schema.json",
+  "namedInputs": {
+    "default": [
+      "{projectRoot}/**/*",
+      "sharedGlobals"
+    ],
+    "production": [
+      "default",
+      "!{projectRoot}/.eslintrc.json",
+      "!{projectRoot}/eslint.config.mjs",
+      "!{projectRoot}/**/?(*.)+(spec|test).[jt]s?(x)?(.snap)",
+      "!{projectRoot}/tsconfig.spec.json",
+      "!{projectRoot}/src/test-setup.[jt]s",
+      "!{projectRoot}/jest.config.[jt]s",
+      "!{projectRoot}/test-setup.[jt]s"
+    ],
+    "sharedGlobals": []
+  },
+  "targetDefaults": {
+    "@angular/build:application": {
+      "cache": true,
+      "dependsOn": [
+        "^build"
+      ],
+      "inputs": [
+        "production",
+        "^production"
+      ]
+    },
+    "@nx/eslint:lint": {
+      "cache": true,
+      "inputs": [
+        "default",
+        "^default",
+        "{workspaceRoot}/.eslintrc.json",
+        "{workspaceRoot}/.eslintignore",
+        "{workspaceRoot}/eslint.config.mjs",
+        "{workspaceRoot}/tools/eslint-rules/**/*"
+      ]
+    },
+    "@nx/esbuild:esbuild": {
+      "cache": true,
+      "dependsOn": [
+        "^build"
+      ],
+      "inputs": [
+        "production",
+        "^production"
+      ]
+    },
+    "@nx/js:tsc": {
+      "cache": true,
+      "dependsOn": [
+        "^build"
+      ],
+      "inputs": [
+        "production",
+        "^production"
+      ]
+    },
+    "@nx/vitest:test": {
+      "cache": true,
+      "inputs": [
+        "default",
+        "^production"
+      ]
+    },
+    "@angular/build:unit-test": {
+      "cache": true,
+      "inputs": [
+        "default",
+        "^production"
+      ]
+    }
+  },
+  "plugins": [
+    {
+      "plugin": "@nx/eslint/plugin",
+      "options": {
+        "targetName": "lint"
+      }
+    },
+    {
+      "plugin": "@nx/vite/plugin",
+      "options": {
+        "buildTargetName": "build",
+        "serveTargetName": "serve",
+        "devTargetName": "dev",
+        "previewTargetName": "preview",
+        "serveStaticTargetName": "serve-static",
+        "typecheckTargetName": "typecheck",
+        "buildDepsTargetName": "build-deps",
+        "watchDepsTargetName": "watch-deps"
+      }
+    },
+    {
+      "plugin": "@nx/vitest",
+      "options": {
+        "testTargetName": "test"
+      }
+    }
+  ],
+  "generators": {
+    "@nx/angular:application": {
+      "e2eTestRunner": "playwright",
+      "linter": "eslint",
+      "style": "css",
+      "unitTestRunner": "vitest-analog"
+    },
+    "@nx/angular:library": {
+      "linter": "eslint",
+      "unitTestRunner": "vitest-analog"
+    },
+    "@nx/angular:component": {
+      "style": "css"
+    }
+  },
+  "analytics": false
+}

package.json

@@ -0,0 +1,71 @@
+{
+  "name": "register-referentie",
+  "version": "0.0.0",
+  "license": "MIT",
+  "scripts": {},
+  "private": true,
+  "dependencies": {
+    "@angular-devkit/build-angular": "21.2.7",
+    "@angular/common": "21.2.9",
+    "@angular/compiler": "21.2.9",
+    "@angular/core": "21.2.9",
+    "@angular/forms": "21.2.9",
+    "@angular/platform-browser": "21.2.9",
+    "@angular/router": "21.2.9",
+    "@utrecht/component-library-angular": "^3.0.2",
+    "@utrecht/design-tokens": "^6.2.1",
+    "angular-auth-oidc-client": "^21.0.2",
+    "rxjs": "~7.8.0",
+    "zone.js": "0.16.0"
+  },
+  "devDependencies": {
+    "@analogjs/vite-plugin-angular": "2.2.0",
+    "@analogjs/vitest-angular": "2.2.0",
+    "@angular-devkit/core": "21.2.7",
+    "@angular-devkit/schematics": "21.2.7",
+    "@angular/build": "21.2.7",
+    "@angular/cli": "21.2.7",
+    "@angular/compiler-cli": "21.2.9",
+    "@angular/language-service": "21.2.9",
+    "@eslint/js": "^9.8.0",
+    "@nx/angular": "23.0.1",
+    "@nx/devkit": "23.0.1",
+    "@nx/esbuild": "23.0.1",
+    "@nx/eslint": "23.0.1",
+    "@nx/eslint-plugin": "23.0.1",
+    "@nx/js": "23.0.1",
+    "@nx/vite": "23.0.1",
+    "@nx/vitest": "23.0.1",
+    "@nx/web": "23.0.1",
+    "@nx/workspace": "23.0.1",
+    "@oxc-project/runtime": "^0.115.0",
+    "@schematics/angular": "21.2.7",
+    "@swc-node/register": "1.11.1",
+    "@swc/core": "1.15.8",
+    "@swc/helpers": "0.5.18",
+    "@testing-library/angular": "^19.4.1",
+    "@types/node": "20.19.9",
+    "@typescript-eslint/utils": "^8.40.0",
+    "@vitest/coverage-v8": "~4.1.0",
+    "@vitest/ui": "~4.1.0",
+    "angular-eslint": "21.3.1",
+    "axe-core": "^4.12.1",
+    "esbuild": "^0.27.0",
+    "eslint": "^9.8.0",
+    "eslint-config-prettier": "^10.0.0",
+    "jiti": "2.4.2",
+    "jsdom": "~22.1.0",
+    "jsonc-eslint-parser": "^2.1.0",
+    "nx": "23.0.1",
+    "orval": "^8.19.0",
+    "prettier": "^3.8.1",
+    "ts-node": "10.9.1",
+    "tslib": "^2.3.0",
+    "typescript": "~5.9.2",
+    "typescript-eslint": "^8.40.0",
+    "vite": "8.0.9",
+    "vite-tsconfig-paths": "^5.1.4",
+    "vitest": "~4.1.0",
+    "vitest-axe": "^0.1.0"
+  }
+}

pnpm-workspace.yaml

@@ -0,0 +1,10 @@
+packages: []
+allowBuilds:
+  '@parcel/watcher': true
+  less: true
+  esbuild: true
+  '@swc/core': true
+  nx: true
+  unrs-resolver: true
+  lmdb: true
+  msgpackr-extract: true

register-referentie.slnx

@@ -7,10 +7,26 @@
     <Project Path="services/acl/Acl.IntegrationTests/Acl.IntegrationTests.csproj" />
     <Project Path="services/acl/Acl.Tests/Acl.Tests.csproj" />
   </Folder>
+  <Folder Name="/services/domain/">
+    <Project Path="services/domain/Big.Domain/Big.Domain.csproj" />
+    <Project Path="services/domain/Big.Application/Big.Application.csproj" />
+    <Project Path="services/domain/Big.Infrastructure/Big.Infrastructure.csproj" />
+    <Project Path="services/domain/Big.Api/Big.Api.csproj" />
+    <Project Path="services/domain/Big.Tests/Big.Tests.csproj" />
+  </Folder>
   <Folder Name="/services/bff/">
     <Project Path="services/bff/Bff.Api/Bff.Api.csproj" />
     <Project Path="services/bff/Bff.Tests/Bff.Tests.csproj" />
   </Folder>
+  <Folder Name="/services/event-subscriber/">
+    <Project Path="services/event-subscriber/EventSubscriber.Api/EventSubscriber.Api.csproj" />
+    <Project Path="services/event-subscriber/EventSubscriber.Application/EventSubscriber.Application.csproj" />
+    <Project Path="services/event-subscriber/EventSubscriber.Tests/EventSubscriber.Tests.csproj" />
+  </Folder>
+  <Folder Name="/services/projection-api/">
+    <Project Path="services/projection-api/Projection.ReadModel/Projection.ReadModel.csproj" />
+    <Project Path="services/projection-api/ProjectionApi.Api/ProjectionApi.Api.csproj" />
+  </Folder>
   <Folder Name="/tests/">
     <Project Path="tests/acceptance/Acceptance.csproj" />
   </Folder>

services/bff/Bff.Api/Bff.Api.csproj

@@ -6,4 +6,10 @@
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
 
+  <ItemGroup>
+    <!-- OIDC/JWT validation of Keycloak-issued tokens (ADR-0010) and OpenAPI generation. -->
+    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="10.0.8" />
+    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.8" />
+  </ItemGroup>
+
 </Project>

services/bff/Bff.Api/DownstreamClients.cs

@@ -0,0 +1,47 @@
+using System.Net.Http.Json;
+
+namespace Bff.Api;
+
+/// <summary>What the self-service submit returns to the portal (the domain's registration id + status).</summary>
+public sealed record SubmitAccepted(string RegistrationId, string Status);
+
+/// <summary>A projection row as the projection-api serves it. <c>Bsn</c>/<c>NaamPlaceholder</c> are
+/// read but never surfaced by the openbaar endpoint (public-safe filtering, ADR-0010/S-09).</summary>
+public sealed record ProjectionEntry(string Id, string Status, string? Bsn, string? NaamPlaceholder);
+
+/// <summary>A public-safe openbaar register row — only non-sensitive fields leave the BFF.</summary>
+public sealed record OpenbaarEntry(string Id, string Status);
+
+/// <summary>Port to the Domain Service (§8.3: the BFF is the portals' only backend; it fans out).</summary>
+public interface IDomainClient
+{
+    Task<SubmitAccepted> SubmitRegistrationAsync(string bsn, CancellationToken ct = default);
+}
+
+/// <summary>Port to the read projection.</summary>
+public interface IProjectionClient
+{
+    Task<IReadOnlyList<ProjectionEntry>> GetRegisterAsync(CancellationToken ct = default);
+}
+
+/// <summary>Calls the Domain Service's <c>POST /registrations</c>.</summary>
+public sealed class DomainClient(HttpClient http) : IDomainClient
+{
+    public async Task<SubmitAccepted> SubmitRegistrationAsync(string bsn, CancellationToken ct = default)
+    {
+        using var response = await http.PostAsJsonAsync("registrations", new { bsn }, ct);
+        response.EnsureSuccessStatusCode();
+        var dto = await response.Content.ReadFromJsonAsync<DomainResponse>(ct)
+            ?? throw new InvalidOperationException("The Domain Service returned an empty registration response.");
+        return new SubmitAccepted(dto.RegistrationId, dto.Status);
+    }
+
+    private sealed record DomainResponse(string RegistrationId, string Status, string? ZaakUrl);
+}
+
+/// <summary>Calls the projection-api's <c>GET /register</c>.</summary>
+public sealed class ProjectionClient(HttpClient http) : IProjectionClient
+{
+    public async Task<IReadOnlyList<ProjectionEntry>> GetRegisterAsync(CancellationToken ct = default)
+        => await http.GetFromJsonAsync<List<ProjectionEntry>>("register", ct) ?? [];
+}

services/bff/Bff.Api/OpenbaarProjection.cs

@@ -0,0 +1,18 @@
+namespace Bff.Api;
+
+/// <summary>
+/// The public view of the read projection: filters rows by the openbaar search term and maps each to
+/// a public-safe <see cref="OpenbaarEntry"/> (only <c>id</c> + <c>status</c> — bsn/naam never leave the
+/// BFF). Pure so it is unit- and mutation-tested directly (ADR-0010).
+/// </summary>
+public static class OpenbaarProjection
+{
+    public static IReadOnlyList<OpenbaarEntry> PublicView(IReadOnlyList<ProjectionEntry> entries, string? q)
+    {
+        var filtered = string.IsNullOrWhiteSpace(q)
+            ? entries
+            : entries.Where(e => e.Id.Contains(q, StringComparison.OrdinalIgnoreCase));
+
+        return [.. filtered.Select(e => new OpenbaarEntry(e.Id, e.Status))];
+    }
+}

services/bff/Bff.Api/Program.cs

@@ -1,10 +1,72 @@
+using System.Security.Claims;
+using Bff.Api;
+using Microsoft.AspNetCore.Authentication.JwtBearer;
+
 var builder = WebApplication.CreateBuilder(args);
+
+var keycloakAuthority = builder.Configuration["Keycloak:Authority"]
+    ?? throw new InvalidOperationException("Missing configuration 'Keycloak:Authority'");
+var domainBaseUrl = builder.Configuration["Downstream:Domain:BaseUrl"]
+    ?? throw new InvalidOperationException("Missing configuration 'Downstream:Domain:BaseUrl'");
+var projectionBaseUrl = builder.Configuration["Downstream:Projection:BaseUrl"]
+    ?? throw new InvalidOperationException("Missing configuration 'Downstream:Projection:BaseUrl'");
+
+// Validate Keycloak-issued tokens (ADR-0010). Audience validation is off for the walking skeleton —
+// Keycloak's audience mapping is a later hardening; signature/issuer/expiry are validated.
+builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
+    .AddJwtBearer(options =>
+    {
+        options.Authority = keycloakAuthority;
+        options.RequireHttpsMetadata = false;
+        options.TokenValidationParameters.ValidateAudience = false;
+    });
+builder.Services.AddAuthorization();
+
+// The BFF is the portals' only backend; it fans out to the domain and projection (§8.3).
+builder.Services.AddHttpClient<IDomainClient, DomainClient>(c => c.BaseAddress = new Uri(domainBaseUrl));
+builder.Services.AddHttpClient<IProjectionClient, ProjectionClient>(c => c.BaseAddress = new Uri(projectionBaseUrl));
+
 builder.Services.AddHealthChecks();
+// Clear the auto-populated `servers` block so the committed spec is stable regardless of the host
+// the doc was generated from (the client sets its own base URL). Keeps the drift guard deterministic.
+builder.Services.AddOpenApi(options =>
+    options.AddDocumentTransformer((document, _, _) =>
+    {
+        document.Servers?.Clear();
+        return Task.CompletedTask;
+    }));
 
 var app = builder.Build();
 
-app.MapGet("/", () => "BFF placeholder");
+app.UseAuthentication();
+app.UseAuthorization();
+
 app.MapHealthChecks("/health");
+app.MapOpenApi();
+
+// Self-service submit: requires a valid digid token; the bsn comes from the token, not the body,
+// and is forwarded to the domain (ADR-0010). Returns 202 — the zaak is opened asynchronously (S-05).
+app.MapPost("/self-service/registrations", async (ClaimsPrincipal user, IDomainClient domain, CancellationToken ct) =>
+{
+    var bsn = user.FindFirstValue("bsn");
+    if (string.IsNullOrWhiteSpace(bsn))
+        return Results.BadRequest("The token carries no bsn claim.");
+
+    var accepted = await domain.SubmitRegistrationAsync(bsn, ct);
+    return Results.Accepted($"/self-service/registrations/{accepted.RegistrationId}", accepted);
+})
+    .RequireAuthorization()
+    .Produces<SubmitAccepted>(StatusCodes.Status202Accepted)
+    .Produces(StatusCodes.Status400BadRequest)
+    .Produces(StatusCodes.Status401Unauthorized);
+
+// Openbaar register: an anonymous public lookup that exposes only public-safe fields (S-09).
+app.MapGet("/openbaar/register", async (string? q, IProjectionClient projection, CancellationToken ct) =>
+{
+    var entries = await projection.GetRegisterAsync(ct);
+    return Results.Ok(OpenbaarProjection.PublicView(entries, q));
+})
+    .Produces<IReadOnlyList<OpenbaarEntry>>(StatusCodes.Status200OK);
 
 app.Run();
 

services/bff/Bff.Api/appsettings.json

@@ -5,5 +5,12 @@
       "Microsoft.AspNetCore": "Warning"
     }
   },
-  "AllowedHosts": "*"
+  "AllowedHosts": "*",
+  "Keycloak": {
+    "Authority": "http://localhost:8180/realms/digid"
+  },
+  "Downstream": {
+    "Domain": { "BaseUrl": "http://localhost:8130/" },
+    "Projection": { "BaseUrl": "http://localhost:8120/" }
+  }
 }

services/bff/Bff.Tests/BffFactory.cs

@@ -0,0 +1,78 @@
+using System.Text;
+using Bff.Api;
+using Microsoft.AspNetCore.Authentication.JwtBearer;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Mvc.Testing;
+using Microsoft.AspNetCore.TestHost;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.IdentityModel.Protocols.OpenIdConnect;
+using Microsoft.IdentityModel.Tokens;
+
+namespace Bff.Tests;
+
+/// <summary>
+/// Test host for the BFF. It swaps the downstream clients for in-memory fakes and reconfigures the
+/// JWT bearer to validate against a local test key (no live Keycloak) — so token validation is
+/// exercised in-process with tokens the tests mint (ADR-0010).
+/// </summary>
+internal sealed class BffFactory : WebApplicationFactory<Program>
+{
+    public static readonly SymmetricSecurityKey TestSigningKey =
+        new(Encoding.UTF8.GetBytes("bff-test-signing-key-that-is-at-least-256-bits-long!"));
+
+    public FakeDomainClient Domain { get; } = new();
+    public FakeProjectionClient Projection { get; } = new();
+
+    protected override void ConfigureWebHost(IWebHostBuilder builder)
+    {
+        builder.UseSetting("Keycloak:Authority", "https://keycloak.invalid/realms/digid");
+        builder.UseSetting("Downstream:Domain:BaseUrl", "http://domain.invalid/");
+        builder.UseSetting("Downstream:Projection:BaseUrl", "http://projection.invalid/");
+
+        builder.ConfigureTestServices(services =>
+        {
+            services.AddSingleton<IDomainClient>(Domain);
+            services.AddSingleton<IProjectionClient>(Projection);
+
+            services.Configure<JwtBearerOptions>(JwtBearerDefaults.AuthenticationScheme, options =>
+            {
+                // Validate locally against the test key; never reach out for OIDC metadata.
+                options.Authority = null;
+                options.MetadataAddress = null!;
+                options.RequireHttpsMetadata = false;
+                options.Configuration = new OpenIdConnectConfiguration();
+                options.TokenValidationParameters = new TokenValidationParameters
+                {
+                    ValidateIssuer = false,
+                    ValidateAudience = false,
+                    ValidateLifetime = true,
+                    ValidateIssuerSigningKey = true,
+                    IssuerSigningKey = TestSigningKey,
+                    ClockSkew = TimeSpan.Zero,
+                };
+            });
+        });
+    }
+}
+
+/// <summary>Captures the bsn the BFF forwarded and returns a canned acceptance.</summary>
+internal sealed class FakeDomainClient : IDomainClient
+{
+    public string? SubmittedBsn { get; private set; }
+    public SubmitAccepted Result { get; set; } = new("reg-123", "Ingediend");
+
+    public Task<SubmitAccepted> SubmitRegistrationAsync(string bsn, CancellationToken ct = default)
+    {
+        SubmittedBsn = bsn;
+        return Task.FromResult(Result);
+    }
+}
+
+/// <summary>Serves a configurable set of projection rows.</summary>
+internal sealed class FakeProjectionClient : IProjectionClient
+{
+    public List<ProjectionEntry> Entries { get; } = [];
+
+    public Task<IReadOnlyList<ProjectionEntry>> GetRegisterAsync(CancellationToken ct = default)
+        => Task.FromResult<IReadOnlyList<ProjectionEntry>>(Entries);
+}

services/bff/Bff.Tests/OpenApiSpecTests.cs

@@ -0,0 +1,34 @@
+using System.Runtime.CompilerServices;
+using System.Text.Json;
+
+namespace Bff.Tests;
+
+/// <summary>
+/// Guards the committed OpenAPI contract (<c>services/bff/openapi.json</c>) against drift: it must
+/// equal the document the running BFF serves. S-08's Angular client is generated from this file, so a
+/// stale spec is a bug. To regenerate: run the BFF and save <c>/openapi/v1.json</c> over the file.
+/// </summary>
+public class OpenApiSpecTests
+{
+    [Fact]
+    public async Task Committed_openapi_spec_matches_the_served_document()
+    {
+        using var factory = new BffFactory();
+
+        var served = await factory.CreateClient().GetStringAsync("/openapi/v1.json");
+        var committed = await File.ReadAllTextAsync(SpecPath());
+
+        Assert.Equal(Canonical(committed), Canonical(served));
+    }
+
+    // Reformat both sides identically so the comparison is about content, not whitespace.
+    private static string Canonical(string json)
+    {
+        using var doc = JsonDocument.Parse(json);
+        return JsonSerializer.Serialize(doc.RootElement, new JsonSerializerOptions { WriteIndented = true });
+    }
+
+    // The committed spec sits at services/bff/openapi.json — one level up from this test file.
+    private static string SpecPath([CallerFilePath] string thisFile = "")
+        => Path.Combine(Path.GetDirectoryName(thisFile)!, "..", "openapi.json");
+}

services/bff/Bff.Tests/OpenbaarEndpointTests.cs

@@ -0,0 +1,38 @@
+using System.Net;
+using System.Net.Http.Json;
+using Bff.Api;
+
+namespace Bff.Tests;
+
+public class OpenbaarEndpointTests
+{
+    [Fact]
+    public async Task Serves_public_safe_rows_anonymously()
+    {
+        using var factory = new BffFactory();
+        factory.Projection.Entries.Add(new ProjectionEntry("abc-111", "INGEDIEND", "123456782", "Jan"));
+
+        // No Authorization header — the openbaar register is a public lookup (ADR-0010/S-09).
+        var response = await factory.CreateClient().GetAsync("/openbaar/register");
+
+        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+        var body = await response.Content.ReadAsStringAsync();
+        Assert.Contains("abc-111", body);
+        Assert.Contains("INGEDIEND", body);
+        // The bsn must never appear in a public response.
+        Assert.DoesNotContain("123456782", body);
+    }
+
+    [Fact]
+    public async Task Filters_by_the_query_parameter()
+    {
+        using var factory = new BffFactory();
+        factory.Projection.Entries.Add(new ProjectionEntry("abc-111", "INGEDIEND", null, null));
+        factory.Projection.Entries.Add(new ProjectionEntry("def-222", "INGEDIEND", null, null));
+
+        var rows = await factory.CreateClient()
+            .GetFromJsonAsync<List<OpenbaarEntry>>("/openbaar/register?q=abc");
+
+        Assert.Equal("abc-111", Assert.Single(rows!).Id);
+    }
+}

services/bff/Bff.Tests/OpenbaarProjectionTests.cs

@@ -0,0 +1,48 @@
+using Bff.Api;
+
+namespace Bff.Tests;
+
+public class OpenbaarProjectionTests
+{
+    private static readonly ProjectionEntry[] Sample =
+    [
+        new("abc-111", "INGEDIEND", "123456782", "Jan"),
+        new("def-222", "INGEDIEND", "987654321", "Piet"),
+    ];
+
+    [Fact]
+    public void Maps_every_row_to_public_safe_fields_when_no_query()
+    {
+        var view = OpenbaarProjection.PublicView(Sample, null);
+
+        Assert.Equal(2, view.Count);
+        Assert.Equal("abc-111", view[0].Id);
+        Assert.Equal("INGEDIEND", view[0].Status);
+    }
+
+    [Fact]
+    public void Public_view_exposes_only_id_and_status()
+    {
+        // OpenbaarEntry structurally carries only Id + Status — bsn/naam can never leak.
+        var props = typeof(OpenbaarEntry).GetProperties().Select(p => p.Name).ToArray();
+        Assert.Equal(["Id", "Status"], props);
+    }
+
+    [Theory]
+    [InlineData("abc", 1)]
+    [InlineData("ABC", 1)]
+    [InlineData("2", 1)]
+    [InlineData("zzz", 0)]
+    public void Filters_by_id_containing_the_query_case_insensitively(string q, int expected)
+    {
+        var view = OpenbaarProjection.PublicView(Sample, q);
+
+        Assert.Equal(expected, view.Count);
+    }
+
+    [Fact]
+    public void Blank_query_is_treated_as_no_filter()
+    {
+        Assert.Equal(2, OpenbaarProjection.PublicView(Sample, "   ").Count);
+    }
+}

services/bff/Bff.Tests/SelfServiceEndpointTests.cs

@@ -0,0 +1,75 @@
+using System.Net;
+using System.Net.Http.Headers;
+using System.Net.Http.Json;
+
+namespace Bff.Tests;
+
+public class SelfServiceEndpointTests
+{
+    private static HttpRequestMessage Submit(string? bearer)
+    {
+        var request = new HttpRequestMessage(HttpMethod.Post, "/self-service/registrations")
+        {
+            Content = JsonContent.Create(new { }),
+        };
+        if (bearer is not null)
+            request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", bearer);
+        return request;
+    }
+
+    [Fact]
+    public async Task Rejects_a_request_without_a_token()
+    {
+        using var factory = new BffFactory();
+        var client = factory.CreateClient();
+
+        var response = await client.SendAsync(Submit(bearer: null));
+
+        Assert.Equal(HttpStatusCode.Unauthorized, response.StatusCode);
+        Assert.Null(factory.Domain.SubmittedBsn);
+    }
+
+    [Theory]
+    [InlineData("not-a-jwt")]
+    public async Task Rejects_a_malformed_token(string bearer)
+    {
+        using var factory = new BffFactory();
+        var response = await factory.CreateClient().SendAsync(Submit(bearer));
+
+        Assert.Equal(HttpStatusCode.Unauthorized, response.StatusCode);
+    }
+
+    [Fact]
+    public async Task Rejects_a_token_signed_with_the_wrong_key()
+    {
+        using var factory = new BffFactory();
+        var response = await factory.CreateClient().SendAsync(Submit(TestTokens.WrongKey("123456782")));
+
+        Assert.Equal(HttpStatusCode.Unauthorized, response.StatusCode);
+    }
+
+    [Fact]
+    public async Task Rejects_an_expired_token()
+    {
+        using var factory = new BffFactory();
+        var response = await factory.CreateClient().SendAsync(Submit(TestTokens.Expired("123456782")));
+
+        Assert.Equal(HttpStatusCode.Unauthorized, response.StatusCode);
+    }
+
+    [Fact]
+    public async Task Accepts_a_valid_token_and_forwards_the_bsn_to_the_domain()
+    {
+        using var factory = new BffFactory();
+        var client = factory.CreateClient();
+
+        var response = await client.SendAsync(Submit(TestTokens.Valid("123456782")));
+
+        Assert.Equal(HttpStatusCode.Accepted, response.StatusCode);
+        Assert.Equal("123456782", factory.Domain.SubmittedBsn);
+        var body = await response.Content.ReadFromJsonAsync<SubmitAcceptedDto>();
+        Assert.Equal("reg-123", body!.RegistrationId);
+    }
+
+    private sealed record SubmitAcceptedDto(string RegistrationId, string Status);
+}

services/bff/Bff.Tests/TestTokens.cs

@@ -0,0 +1,30 @@
+using System.Text;
+using Microsoft.IdentityModel.JsonWebTokens;
+using Microsoft.IdentityModel.Tokens;
+
+namespace Bff.Tests;
+
+/// <summary>Mints JWTs for the BFF tests — signed with the factory's test key (valid) or otherwise
+/// (a wrong key / expired) to exercise the bearer validation the BFF configures.</summary>
+internal static class TestTokens
+{
+    public static string Valid(string bsn) => Create(bsn, BffFactory.TestSigningKey, expired: false);
+
+    public static string Expired(string bsn) => Create(bsn, BffFactory.TestSigningKey, expired: true);
+
+    public static string WrongKey(string bsn) => Create(
+        bsn,
+        new SymmetricSecurityKey(Encoding.UTF8.GetBytes("a-different-signing-key-256-bits-long-indeed-yes!")),
+        expired: false);
+
+    private static string Create(string bsn, SymmetricSecurityKey key, bool expired)
+    {
+        var handler = new JsonWebTokenHandler();
+        return handler.CreateToken(new SecurityTokenDescriptor
+        {
+            Claims = new Dictionary<string, object> { ["bsn"] = bsn },
+            Expires = DateTime.UtcNow.AddMinutes(expired ? -5 : 30),
+            SigningCredentials = new SigningCredentials(key, SecurityAlgorithms.HmacSha256),
+        });
+    }
+}

services/bff/openapi.json

@@ -0,0 +1,104 @@
+{
+  "openapi": "3.1.1",
+  "info": {
+    "title": "Bff.Api | v1",
+    "version": "1.0.0"
+  },
+  "paths": {
+    "/self-service/registrations": {
+      "post": {
+        "tags": [
+          "Bff.Api"
+        ],
+        "responses": {
+          "202": {
+            "description": "Accepted",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/SubmitAccepted"
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "Bad Request"
+          },
+          "401": {
+            "description": "Unauthorized"
+          }
+        }
+      }
+    },
+    "/openbaar/register": {
+      "get": {
+        "tags": [
+          "Bff.Api"
+        ],
+        "parameters": [
+          {
+            "name": "q",
+            "in": "query",
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "array",
+                  "items": {
+                    "$ref": "#/components/schemas/OpenbaarEntry"
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "OpenbaarEntry": {
+        "required": [
+          "id",
+          "status"
+        ],
+        "type": "object",
+        "properties": {
+          "id": {
+            "type": "string"
+          },
+          "status": {
+            "type": "string"
+          }
+        }
+      },
+      "SubmitAccepted": {
+        "required": [
+          "registrationId",
+          "status"
+        ],
+        "type": "object",
+        "properties": {
+          "registrationId": {
+            "type": "string"
+          },
+          "status": {
+            "type": "string"
+          }
+        }
+      }
+    }
+  },
+  "tags": [
+    {
+      "name": "Bff.Api"
+    }
+  ]
+}

services/bff/stryker-config.json

@@ -0,0 +1,16 @@
+{
+  "stryker-config": {
+    "solution": "Bff.slnx",
+    "test-projects": ["Bff.Tests/Bff.Tests.csproj"],
+    "reporters": ["progress", "html"],
+    "mutate": [
+      "!**/Program.cs",
+      "!**/DownstreamClients.cs"
+    ],
+    "thresholds": {
+      "high": 95,
+      "low": 90,
+      "break": 90
+    }
+  }
+}

services/domain/.dockerignore

@@ -0,0 +1,4 @@
+**/bin
+**/obj
+**/*.user
+StrykerOutput