#243: VS_NFD_MODE and the machine-readable hardening-profile catalog

The deployment declares through VS_NFD_MODE (off | marked | hidden |
enforced, default off) how the application treats configuration that
violates the VS-NfD reference profile — deploy-level like
BACKUP_ALLOWED_TARGETS, so a compromised Site Admin cannot widen it.
The catalog in shared (vs-nfd-profile.ts) is the single source of
truth: every profile-relevant setting with a decidable compliant value,
judgement calls in an explicit advisory list, and a fence test parsing
the hardening guide's reference tables so neither can drift (pattern
#201). The api evaluates the catalog against the typed settings
registry and validated env and exposes mode + verdict on
GET /admin/system/vs-nfd-profile; the admin settings view shows the
card whenever the mode is not off. Display only — the treatments land
with #244–#246 (ADR 0027, proposed).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AUtYMxwTCMHG9mVHnwbFg8

apps/api/src/admin/system-admin.controller.ts

@@ -10,10 +10,12 @@ import {
   type StorageOverviewView,
   type SystemBackupView,
   type SystemJobView,
+  type VsNfdProfileView,
 } from '@dorfteich/shared';
 
 import { AuthedRequest } from '../auth/auth.guard';
 import { ZodValidationPipe } from '../common/zod-validation.pipe';
+import { VsNfdProfileService } from '../settings/vs-nfd-profile.service';
 import { SiteAdminGuard } from './site-admin.guard';
 import { SystemAdminService } from './system-admin.service';
 
@@ -21,7 +23,17 @@ import { SystemAdminService } from './system-admin.service';
 @Controller('admin/system')
 @UseGuards(SiteAdminGuard)
 export class SystemAdminController {
-  constructor(private readonly system: SystemAdminService) {}
+  constructor(
+    private readonly system: SystemAdminService,
+    private readonly vsNfdProfile: VsNfdProfileService,
+  ) {}
+
+  /** Active VS-NfD mode + catalog verdict for the running configuration
+   * (issue #243, ADR 0027). Exposure only — the treatments are #244–#246. */
+  @Get('vs-nfd-profile')
+  vsNfd(): Promise<VsNfdProfileView> {
+    return this.vsNfdProfile.evaluate();
+  }
 
   @Get('jobs')
   async jobs(): Promise<SystemJobView[]> {

apps/api/src/settings/settings.module.ts

@@ -1,11 +1,12 @@
 import { Global, Module } from '@nestjs/common';
 
 import { InstanceSettingsService } from './instance-settings.service';
+import { VsNfdProfileService } from './vs-nfd-profile.service';
 
 /** Global: instance configuration is read across many feature modules. */
 @Global()
 @Module({
-  providers: [InstanceSettingsService],
+  providers: [InstanceSettingsService, VsNfdProfileService],
-  exports: [InstanceSettingsService],
+  exports: [InstanceSettingsService, VsNfdProfileService],
 })
 export class SettingsModule {}

apps/api/src/settings/vs-nfd-profile-catalogue.test.ts

@@ -0,0 +1,54 @@
+import { readFileSync } from 'node:fs';
+import { join } from 'node:path';
+
+import { VS_NFD_PROFILE, VS_NFD_PROFILE_ADVISORY } from '@dorfteich/shared';
+import { describe, expect, it } from 'vitest';
+
+/**
+ * The fence that keeps the machine-readable VS-NfD catalog (issue #243)
+ * and the hardening guide (issue #227) together — same pattern as the
+ * audit-catalogue fence (#201): every switch the guide's reference tables
+ * name must be triaged into the catalog (decidable compliant value) or
+ * the explicit advisory list (judgement call), and neither may name a
+ * switch the guide does not know. A new switch line in the guide without
+ * a triage decision fails this test.
+ */
+// __dirname, not import.meta: the api package compiles CJS.
+const doc = readFileSync(
+  join(__dirname, '../../../../docs/vs-nfd/50-haertungsleitfaden.md'),
+  'utf8',
+);
+
+/** All code spans in the first cell of each table row between two headings. */
+function guideKeys(fromHeading: string, toHeading: string): string[] {
+  const from = doc.indexOf(fromHeading);
+  const to = doc.indexOf(toHeading);
+  expect(from).toBeGreaterThan(-1);
+  expect(to).toBeGreaterThan(from);
+  const keys: string[] = [];
+  for (const line of doc.slice(from, to).split('\n')) {
+    if (!line.startsWith('|')) continue;
+    const firstCell = line.split('|')[1] ?? '';
+    for (const match of firstCell.matchAll(/`([^`]+)`/g)) {
+      keys.push(match[1]!);
+    }
+  }
+  return keys.sort();
+}
+
+function triagedKeys(scope: 'instance' | 'deploy'): string[] {
+  return [
+    ...VS_NFD_PROFILE.filter((e) => e.scope === scope).map((e) => e.key),
+    ...VS_NFD_PROFILE_ADVISORY.filter((e) => e.scope === scope).map((e) => e.key),
+  ].sort();
+}
+
+describe('VS-NfD catalog fence (issue #243)', () => {
+  it('triages every instance setting of hardening-guide §1.1', () => {
+    expect(triagedKeys('instance')).toEqual(guideKeys('### 1.1', '### 1.2'));
+  });
+
+  it('triages every deploy variable of hardening-guide §1.2', () => {
+    expect(triagedKeys('deploy')).toEqual(guideKeys('### 1.2', '### 1.3'));
+  });
+});

apps/api/src/settings/vs-nfd-profile.e2e.db.test.ts

@@ -0,0 +1,114 @@
+import { INestApplication } from '@nestjs/common';
+import { type VsNfdProfileView } from '@dorfteich/shared';
+import { PrismaClient } from '@prisma/client';
+import request from 'supertest';
+import { afterAll, beforeAll, describe, expect, it } from 'vitest';
+
+import { createTestApp, sessionCookieOf } from '../testing/test-app';
+import { createTestPrisma, hasTestDb, uniqueSuffix } from '../testing/test-db';
+import { UsersService } from '../users/users.service';
+
+import { InstanceSettingsService } from './instance-settings.service';
+
+/**
+ * The VS-NfD profile endpoint (issue #243): active mode from the env,
+ * catalog verdict from the running configuration — Site-Admin only. The
+ * mode is deploy-level, so it is fixed per app boot (env override BEFORE
+ * createTestApp, pattern local-auth-switch.e2e.db.test.ts).
+ */
+describe.skipIf(!hasTestDb)('VS-NfD profile endpoint (e2e, issue #243)', () => {
+  let app: INestApplication;
+  let prisma: PrismaClient;
+  const suffix = uniqueSuffix();
+  const password = 'profilkatalog ist wachsam 1';
+  const ids: Record<string, string> = {};
+  const cookies: Record<string, string> = {};
+
+  const api = () => request(app.getHttpServer());
+
+  async function makeUser(handle: string, siteAdmin: boolean): Promise<void> {
+    const users = app.get(UsersService);
+    const username = `nfd-${handle}-${suffix}`;
+    const user = await users.createUser({
+      username,
+      email: `${username}@example.org`,
+      displayName: `Nfd ${handle}`,
+      password,
+      locale: 'en',
+    });
+    await users.markEmailVerified(user.id);
+    if (siteAdmin)
+      await prisma.user.update({ where: { id: user.id }, data: { isSiteAdmin: true } });
+    ids[handle] = user.id;
+    cookies[handle] = sessionCookieOf(
+      await api()
+        .post('/api/v1/auth/login')
+        .send({ usernameOrEmail: username, password })
+        .expect(200),
+    );
+  }
+
+  beforeAll(async () => {
+    process.env.VS_NFD_MODE = 'marked';
+    prisma = createTestPrisma();
+    await prisma.rateLimit.deleteMany({});
+    app = await createTestApp();
+    await makeUser('admin', true);
+    await makeUser('user', false);
+  });
+
+  afterAll(async () => {
+    delete process.env.VS_NFD_MODE;
+    await prisma.instanceSetting.deleteMany({
+      where: { key: { in: ['auth.registrationMode', 'legal.imprint'] } },
+    });
+    await prisma.user.deleteMany({ where: { username: { contains: suffix } } });
+    await prisma.$disconnect();
+    await app.close();
+  });
+
+  it('is Site-Admin only', async () => {
+    await api().get('/api/v1/admin/system/vs-nfd-profile').expect(401);
+    await api().get('/api/v1/admin/system/vs-nfd-profile').set('Cookie', cookies.user!).expect(403);
+  });
+
+  it('reports the env mode and a truthful per-entry verdict', async () => {
+    const res = await api()
+      .get('/api/v1/admin/system/vs-nfd-profile')
+      .set('Cookie', cookies.admin!)
+      .expect(200);
+    const view = res.body as VsNfdProfileView;
+    expect(view.mode).toBe('marked');
+    // Fresh instance: registration open, feeds/plugins on, read trail off,
+    // legal texts empty — all violations by design of the defaults.
+    const byKey = new Map(view.entries.map((e) => [e.key, e]));
+    expect(byKey.get('auth.registrationMode')!.compliant).toBe(false);
+    expect(byKey.get('api.enabled')!.compliant).toBe(true);
+    expect(byKey.get('feeds.enabled')!.compliant).toBe(false);
+    expect(byKey.get('readTrail.enabled')!.compliant).toBe(false);
+    expect(byKey.get('legal.imprint')!.compliant).toBe(false);
+    // Deploy scope: the test env keeps the permissive defaults.
+    expect(byKey.get('AUTH_LOCAL_ENABLED')!.compliant).toBe(false);
+    expect(view.violations).toBe(view.entries.filter((e) => !e.compliant).length);
+    expect(view.violations).toBeGreaterThan(0);
+  });
+
+  it('verdict follows a settings change', async () => {
+    const settings = app.get(InstanceSettingsService);
+    const before = (
+      await api()
+        .get('/api/v1/admin/system/vs-nfd-profile')
+        .set('Cookie', cookies.admin!)
+        .expect(200)
+    ).body as VsNfdProfileView;
+    await settings.set('auth.registrationMode', 'closed', ids.admin!);
+    const after = (
+      await api()
+        .get('/api/v1/admin/system/vs-nfd-profile')
+        .set('Cookie', cookies.admin!)
+        .expect(200)
+    ).body as VsNfdProfileView;
+    expect(after.entries.find((e) => e.key === 'auth.registrationMode')!.compliant).toBe(true);
+    expect(after.violations).toBe(before.violations - 1);
+  });
+});

apps/api/src/settings/vs-nfd-profile.service.ts

@@ -0,0 +1,50 @@
+import { Injectable } from '@nestjs/common';
+import {
+  VS_NFD_PROFILE,
+  describeCompliance,
+  isVsNfdCompliant,
+  type ApiEnv,
+  type VsNfdProfileEntry,
+  type VsNfdProfileView,
+} from '@dorfteich/shared';
+
+import { AppConfig } from '../config/app-config.service';
+import { InstanceSettingsService, type InstanceSettings } from './instance-settings.service';
+
+/**
+ * Evaluates the running configuration against the VS-NfD reference
+ * profile (issue #243, ADR 0027). Instance entries read the settings
+ * registry, deploy entries the validated env — both through their normal
+ * typed paths, so the verdict always describes what the application
+ * actually does, not what a file claims. The three treatment modes
+ * (#244–#246) build on this evaluation; here it is exposure only.
+ */
+@Injectable()
+export class VsNfdProfileService {
+  constructor(
+    private readonly settings: InstanceSettingsService,
+    private readonly config: AppConfig,
+  ) {}
+
+  private valueOf(entry: VsNfdProfileEntry, settings: InstanceSettings): unknown {
+    return entry.scope === 'instance'
+      ? settings[entry.key as keyof InstanceSettings]
+      : this.config.env[entry.key as keyof ApiEnv];
+  }
+
+  async evaluate(): Promise<VsNfdProfileView> {
+    const settings = await this.settings.getAll();
+    const entries = VS_NFD_PROFILE.map((entry) => ({
+      scope: entry.scope,
+      key: entry.key,
+      compliant: isVsNfdCompliant(entry, this.valueOf(entry, settings)),
+      compliantValue: describeCompliance(entry.compliance),
+      hardeningRef: entry.hardeningRef,
+    }));
+    return {
+      mode: this.config.env.VS_NFD_MODE,
+      entries,
+      violations: entries.filter((entry) => !entry.compliant).length,
+    };
+  }
+}

apps/web/src/pages/AdminSettingsPage.tsx

@@ -1,5 +1,5 @@
 import { useQuery, useQueryClient } from '@tanstack/react-query';
-import { docToHtml, markdownToDoc } from '@dorfteich/shared';
+import { docToHtml, markdownToDoc, type VsNfdProfileView } from '@dorfteich/shared';
 import { useState } from 'react';
 import { useForm } from 'react-hook-form';
 import { useTranslation } from 'react-i18next';
@@ -71,6 +71,7 @@ export function AdminSettingsPage(): React.JSX.Element {
         <Link to="/admin/system">{t('system:settingsLink')} →</Link>
       </p>
       <SettingsLayout>
+        <VsNfdProfileSection />
         <section className="settings-section">
           <h2>{t('settings:admin.general')}</h2>
           <form onSubmit={onSubmit} noValidate>
@@ -152,6 +153,50 @@ export function AdminSettingsPage(): React.JSX.Element {
   );
 }
 
+/**
+ * VS-NfD hardening-profile card (issue #243, ADR 0027): active mode and
+ * the catalog verdict for the running configuration. Renders nothing in
+ * mode `off` — outside a VS context the profile is not a topic. Display
+ * only; the mode treatments land with #244–#246. Text carries the whole
+ * meaning (never colour alone, ADR 0017).
+ */
+function VsNfdProfileSection(): React.JSX.Element | null {
+  const { t } = useTranslation('settings');
+  const profile = useQuery({
+    queryKey: ['admin', 'vs-nfd-profile'],
+    queryFn: () => apiGet<VsNfdProfileView>('/admin/system/vs-nfd-profile'),
+  });
+
+  if (!profile.data || profile.data.mode === 'off') return null;
+  const violations = profile.data.entries.filter((entry) => !entry.compliant);
+
+  return (
+    <section className="settings-section">
+      <h2>{t('admin.vsNfd.title')}</h2>
+      <p>{t('admin.vsNfd.intro')}</p>
+      <p>
+        {t('admin.vsNfd.modeLabel')}: <strong>{t(`admin.vsNfd.modes.${profile.data.mode}`)}</strong>
+      </p>
+      {violations.length === 0 ? (
+        <p>{t('admin.vsNfd.compliant')}</p>
+      ) : (
+        <>
+          <p>{t('admin.vsNfd.violations', { count: violations.length })}</p>
+          <ul>
+            {violations.map((entry) => (
+              <li key={`${entry.scope}:${entry.key}`}>
+                <code>{entry.key}</code> —{' '}
+                {t('admin.vsNfd.referenceValue', { value: entry.compliantValue })} (
+                {t('admin.vsNfd.guideRef', { section: entry.hardeningRef })})
+              </li>
+            ))}
+          </ul>
+        </>
+      )}
+    </section>
+  );
+}
+
 /**
  * Upload allowlist + SVG policy (issue #61). The allowlist is an array in the
  * api but edited here as a comma-separated field; images are always allowed

deploy/compose/.env.example

@@ -105,6 +105,17 @@ SMTP_FROM=Dorfteich <wiki@example.com>
 # mirror stop. Deploy-level on purpose: Site-Admins cannot widen it.
 #BACKUP_ALLOWED_TARGETS=cloud.example.org,172.30.1.10
 
+# VS-NfD hardening-profile mode (issue #243, ADR 0027): how the application
+# treats configuration that violates the reference profile of
+# docs/vs-nfd/50-haertungsleitfaden.md. off (default) = VS-NfD is not a
+# topic, no marking anywhere; marked = violations are marked in the admin
+# UI; hidden = violating options disappear (the hiding is marked);
+# enforced = violating writes are rejected server-side. The treatments
+# roll out with #244–#246; until then every non-off mode shows the profile
+# card in the admin settings. Deploy-level on purpose: Site-Admins cannot
+# widen it.
+#VS_NFD_MODE=marked
+
 # Optional rsync mirror of the backup sets to a private host (issue #84):
 # rsync-over-ssh target plus the private key file INSIDE the container —
 # put the key on the secrets volume (docker compose cp), never in the repo.

deploy/compose/docker-compose.yml

@@ -58,6 +58,9 @@ services:
       # Must match the backup service's value — the api validates admin
       # backup settings against the same allowlist (issue #192).
       BACKUP_ALLOWED_TARGETS: ${BACKUP_ALLOWED_TARGETS:-}
+      # VS-NfD hardening-profile mode (issue #243, ADR 0027):
+      # off | marked | hidden | enforced. Empty = off — no marking anywhere.
+      VS_NFD_MODE: ${VS_NFD_MODE:-}
       # SMTP relay. Empty (= unset in .env) is fine: the setup wizard writes
       # the relay to the secret store on the `secrets` volume (issue #80);
       # values set here in the stage .env always win over the store.

docs/architecture/adr/0027-vs-nfd-hardening-profile-mode.md

@@ -0,0 +1,66 @@
+# ADR 0027: VS-NfD hardening-profile mode and configuration catalog
+
+- Status: proposed
+- Date: 2026-07-31
+
+## Context
+
+The hardening guide (issue #227, `docs/vs-nfd/50-haertungsleitfaden.md`)
+names a reference configuration for VS-NfD operation, but it is prose: the
+application cannot answer whether the running configuration matches it,
+and an operator flipping a switch in the admin UI gets no hint that the
+choice leaves the profile. Requested by the operator (2026-07-30) as a
+follow-up to the M24/M25 switches: the application itself should know
+which options violate the profile — while deployments outside any VS
+context stay entirely unaffected.
+
+## Decision
+
+1. **A deploy-level mode, not a runtime setting.** `VS_NFD_MODE`
+   (`off | marked | hidden | enforced`) is an environment variable,
+   validated in the shared env schema and passed through compose — for the
+   same reason as `BACKUP_ALLOWED_TARGETS` (#192, ADR 0026): a
+   compromised Site-Admin account must not be able to widen it. The modes
+   escalate: `marked` shows violations at the point of decision (#244),
+   `hidden` removes violating options and marks the hiding (#245),
+   `enforced` additionally rejects violating writes server-side (#246) —
+   hiding alone is UI cosmetics a scripted client bypasses.
+2. **`off` is the default.** Outside a VS context the profile is not a
+   topic: no marking, no card, no behavioural difference. Existing
+   deployments upgrade without noticing the feature exists.
+3. **The machine-readable catalog is the single source of truth**
+   (`packages/shared/src/vs-nfd-profile.ts`): every profile-relevant
+   setting with a decidable compliant value (a tiny predicate model —
+   equals, upper bound, non-empty) and its hardening-guide section.
+   Judgement-call entries ("only what the service needs") live in an
+   explicit advisory list. A fence test (pattern of the audit-catalogue
+   fence #201) parses the guide's reference tables and fails when a
+   switch is neither in the catalog nor in the advisory list — the guide
+   keeps its binding maintenance rule, the catalog can never silently lag.
+4. **Pond-level opt-ins are deliberately absent** (`apiEnabled`,
+   `mcpEnabled`): their instance master switches govern; a pond opt-in
+   under a compliant master switch cannot violate the profile on its own.
+   The evaluation and enforcement paths are scope-generic, so pond
+   entries can be added if that judgement changes.
+5. **Exposure first** (#243): the api evaluates the catalog against the
+   typed settings registry and the validated env and reports mode +
+   verdict on `GET /admin/system/vs-nfd-profile`; the admin settings view
+   shows the card whenever the mode is not `off`. The three treatments
+   build on exactly this evaluation.
+
+## Consequences
+
+- The guide gains a second consumer: every new switch line must be
+  triaged (catalog or advisory) or CI fails — a deliberate speed bump,
+  same trade-off as the audit-catalogue fence.
+- Deploy-level means changing the mode requires a deployment change and
+  an api restart; that is the point (role separation, operations
+  handbook §6).
+- The verdict describes decidable entries only; advisory entries remain
+  an assessor's reading of the guide. The card says what deviates, the
+  guide says why it matters.
+
+## Implementing issues
+
+#243 (mode, catalog, fence, exposure), #244 (`marked`), #245 (`hidden`),
+#246 (`enforced`).

docs/vs-nfd/50-haertungsleitfaden.md

@@ -48,7 +48,7 @@ Settings-Cache ist in-process (operations.md).
 ### 1.2 Deploy-Konfiguration (`.env` / Compose — nur Plattformzugriff, bewusst nicht per Admin-UI)
 
 | Variable                                                                                                        | Referenzwert                                                  | Warum                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
-| --------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
+| --------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
 | `BACKUP_ALLOWED_TARGETS`                                                                                        | leer lassen **oder** exakt der eine freigegebene Spiegel-Host | leere Allowlist schaltet ALLE Fernziele hart ab (ADR 0026, #192) — „Backup nur lokal" ist damit deploy-seitig erzwungen und vom Site-Admin nicht aufweichbar (Rollentrennung, Betriebshandbuch §6).                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
 | `SESSION_ABSOLUTE_HOURS`                                                                                        | `12` (Default 168)                                            | eine Sitzung überdauert keinen Arbeitstag; Neuanmeldung am nächsten Tag ist der Preis.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
 | `SESSION_IDLE_HOURS`                                                                                            | `2` (Default 72)                                              | unbeaufsichtigte, noch angemeldete Arbeitsplätze fallen schnell zurück auf die Anmeldemaske.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
@@ -58,6 +58,7 @@ Settings-Cache ist in-process (operations.md).
 | `OIDC_ISSUER`, `OIDC_CLIENT_ID`, `OIDC_CLIENT_SECRET`, `OIDC_SCOPES`, `OIDC_PROVIDER_LABEL`                     | IdP der Behörde konfigurieren                                 | Fremdauthentisierung (#214, ADR 0021): Authorization Code + PKCE gegen den IdP der Umgebung; deploy-seitig, weil die Authentisierungshoheit Plattformsache ist. Erst-Login legt Konten just-in-time an; bestehende lokale Konten werden NIE stillschweigend per E-Mail übernommen (expliziter Link-Flow). Konfigurationsdetails: security.md §External authentication.                                                                                                                                                                                                                                                                                 |
 | `AUTH_PROXY_HEADER`, `AUTH_PROXY_TRUSTED_PEERS`, `AUTH_PROXY_MAP`, `AUTH_PROXY_MODE`, `AUTH_PROXY_DN_ATTRIBUTE` | nur bei Perimeter-Authentisierung setzen                      | Alternativpfad (#215): Identität aus dem Proxy-Header, gültig NUR vom TCP-Peer der Allowlist; fremder Peer mit Header wird abgewiesen und auditiert (`auth.proxy_rejected`). Der Proxy MUSS den Header aus eingehendem Verkehr strippen. mTLS-Variante über weitergereichten Zertifikats-DN (`mtls-dn`). Ohne Perimeter-Auth: unkonfiguriert lassen (Header wirkungslos).                                                                                                                                                                                                                                                                              |
 | `AUTH_LOCAL_ENABLED`                                                                                            | `false` (Default `true`)                                      | **der** harte Schalter aus ADR 0021 (#216, deploy-seitige Realisierung von `auth.local.enabled`): `false` schaltet JEDEN lokalen Credential-Flow auf 404 (Login, Signup, Verifikation, Passwort vergessen/zuruecksetzen/aendern) — Anmeldung ausschliesslich ueber OIDC (#214) bzw. Perimeter-Auth (#215). Deploy-seitig, damit ein kompromittierter Site-Admin ihn nicht zurueckdrehen kann. Reihenfolge: erst Setup/Bootstrap (SETUP_ADMIN_*), dann auf `false`. PAT-/Feed-Token-Ausgabe bleibt fuer IdP-authentisierte Nutzer verfuegbar (eigene Schalter `api.enabled`/`feeds.enabled`; bewusste Entscheidung #216).                               |
+| `VS_NFD_MODE`                                                                                                   | `marked` (Default `off`; Ziel `enforced`)                     | Härtungsprofil-Modus (#243, ADR 0027): die Anwendung kennt diese Referenzkonfiguration als maschinenlesbaren Katalog und bewertet die laufende Konfiguration dagegen (Site-Admin → Einstellungen). `marked` markiert Abweichungen, `hidden` blendet abweichende Optionen aus, `enforced` weist abweichende Schreibzugriffe serverseitig ab — die drei Behandlungsstufen rollen mit #244–#246 aus; bis dahin ist `marked` der empfohlene Wert (reine Anzeige). Deploy-seitig wie `BACKUP_ALLOWED_TARGETS`: ein kompromittierter Site-Admin kann den Modus nicht aufweichen. Außerhalb von VS-Kontexten bleibt der Default `off` — keinerlei Markierung. |
 
 ### 1.3 Noch nicht verfügbar (Regel: landet hier im selben PR)
 

packages/shared/i18n/de/settings.json

@@ -56,7 +56,22 @@
     "uploadPolicy": "Datei-Uploads auf eingestufte Seiten",
     "uploadPolicyHelp": "Anhänge erben die Einstufung der Seite, tragen selbst aber keine Kennzeichnung im Inhalt. „Blockieren\" lehnt Uploads auf eingestufte Seiten serverseitig ab.",
     "uploadPolicyWarn": "Warnen — Upload mit deutlichem Hinweis erlauben",
-    "uploadPolicyBlock": "Blockieren — Uploads auf eingestufte Seiten ablehnen"
+    "uploadPolicyBlock": "Blockieren — Uploads auf eingestufte Seiten ablehnen",
+    "vsNfd": {
+      "title": "VS-NfD-Profil",
+      "intro": "Das Deployment vergleicht die laufende Konfiguration mit der Referenzkonfiguration des Härtungsleitfadens (Deploy-Variable VS_NFD_MODE).",
+      "modeLabel": "Aktiver Modus",
+      "modes": {
+        "marked": "markiert — Abweichungen werden angezeigt",
+        "hidden": "ausgeblendet — abweichende Optionen werden nicht angeboten",
+        "enforced": "erzwungen — abweichende Konfiguration wird serverseitig abgewiesen"
+      },
+      "compliant": "Die laufende Konfiguration entspricht der Referenzkonfiguration.",
+      "violations_one": "{{count}} Einstellung weicht von der Referenzkonfiguration ab:",
+      "violations_other": "{{count}} Einstellungen weichen von der Referenzkonfiguration ab:",
+      "referenceValue": "Referenzwert: {{value}}",
+      "guideRef": "Härtungsleitfaden §{{section}}"
+    }
   },
   "landing": {
     "title": "Startseite",

packages/shared/i18n/en/settings.json

@@ -56,7 +56,22 @@
     "uploadPolicy": "File uploads to classified pages",
     "uploadPolicyHelp": "Attachments inherit the page’s classification but carry no marking in their content. “Block” rejects uploads to classified pages server-side.",
     "uploadPolicyWarn": "Warn — allow the upload with a clear notice",
-    "uploadPolicyBlock": "Block — reject uploads to classified pages"
+    "uploadPolicyBlock": "Block — reject uploads to classified pages",
+    "vsNfd": {
+      "title": "VS-NfD profile",
+      "intro": "The deployment compares the running configuration against the hardening guide's reference configuration (deploy variable VS_NFD_MODE).",
+      "modeLabel": "Active mode",
+      "modes": {
+        "marked": "marked — deviations are shown",
+        "hidden": "hidden — deviating options are not offered",
+        "enforced": "enforced — deviating configuration is rejected server-side"
+      },
+      "compliant": "The running configuration matches the reference configuration.",
+      "violations_one": "{{count}} setting deviates from the reference configuration:",
+      "violations_other": "{{count}} settings deviate from the reference configuration:",
+      "referenceValue": "Reference value: {{value}}",
+      "guideRef": "Hardening guide §{{section}}"
+    }
   },
   "landing": {
     "title": "Landing page",

packages/shared/src/env.ts

@@ -1,6 +1,7 @@
 import { z } from 'zod';
 
 import { parseBackupTargetAllowlist } from './backup-target-policy';
+import { vsNfdModeSchema } from './vs-nfd-profile';
 
 /**
  * Environment schemas live here so api, collab, and tooling validate their
@@ -208,6 +209,14 @@ export const apiEnvSchema = z.object({
    * proxy forwards it) and the identity is the configured attribute. */
   AUTH_PROXY_MODE: z.enum(['plain', 'mtls-dn']).default('plain'),
   AUTH_PROXY_DN_ATTRIBUTE: z.string().min(1).default('CN'),
+  /**
+   * How the UI and API treat configuration options violating the VS-NfD
+   * reference profile (issue #243, ADR 0027): off | marked | hidden |
+   * enforced. Default `off` — outside a VS context the profile is not a
+   * topic and nothing is marked. Deploy-level like BACKUP_ALLOWED_TARGETS:
+   * a compromised Site Admin must not be able to widen the mode.
+   */
+  VS_NFD_MODE: vsNfdModeSchema.default('off'),
 });
 
 export type ApiEnv = z.infer<typeof apiEnvSchema>;

packages/shared/src/index.ts

@@ -36,4 +36,5 @@ export * from './quotas';
 export * from './text-diff';
 export * from './theme';
 export * from './tree';
+export * from './vs-nfd-profile';
 export * from './watches';

packages/shared/src/vs-nfd-profile.test.ts

@@ -0,0 +1,59 @@
+import { describe, expect, it } from 'vitest';
+
+import {
+  VS_NFD_PROFILE,
+  VS_NFD_PROFILE_ADVISORY,
+  describeCompliance,
+  isVsNfdCompliant,
+  vsNfdModeSchema,
+} from './vs-nfd-profile';
+
+describe('vsNfdModeSchema (issue #243)', () => {
+  it('accepts the four modes and rejects anything else', () => {
+    for (const mode of ['off', 'marked', 'hidden', 'enforced']) {
+      expect(vsNfdModeSchema.parse(mode)).toBe(mode);
+    }
+    expect(() => vsNfdModeSchema.parse('strict')).toThrow();
+  });
+});
+
+describe('isVsNfdCompliant', () => {
+  const entry = (compliance: (typeof VS_NFD_PROFILE)[number]['compliance']) =>
+    ({ scope: 'instance', key: 'x', compliance, hardeningRef: '1.1' }) as const;
+
+  it('equals compares strictly — no truthiness shortcuts', () => {
+    expect(isVsNfdCompliant(entry({ kind: 'equals', value: false }), false)).toBe(true);
+    expect(isVsNfdCompliant(entry({ kind: 'equals', value: false }), 'false')).toBe(false);
+    expect(isVsNfdCompliant(entry({ kind: 'equals', value: 'closed' }), 'closed')).toBe(true);
+    expect(isVsNfdCompliant(entry({ kind: 'equals', value: 'closed' }), 'open')).toBe(false);
+  });
+
+  it('maxNumber bounds numeric values and rejects non-numbers', () => {
+    expect(isVsNfdCompliant(entry({ kind: 'maxNumber', value: 12 }), 12)).toBe(true);
+    expect(isVsNfdCompliant(entry({ kind: 'maxNumber', value: 12 }), 13)).toBe(false);
+    expect(isVsNfdCompliant(entry({ kind: 'maxNumber', value: 12 }), '2')).toBe(false);
+  });
+
+  it('nonEmpty requires actual text', () => {
+    expect(isVsNfdCompliant(entry({ kind: 'nonEmpty' }), 'Impressum')).toBe(true);
+    expect(isVsNfdCompliant(entry({ kind: 'nonEmpty' }), '   ')).toBe(false);
+    expect(isVsNfdCompliant(entry({ kind: 'nonEmpty' }), undefined)).toBe(false);
+  });
+});
+
+describe('catalog shape', () => {
+  it('lists every key at most once per scope, disjoint from the advisory list', () => {
+    const keyOf = (e: { scope: string; key: string }) => `${e.scope}:${e.key}`;
+    const catalog = VS_NFD_PROFILE.map(keyOf);
+    const advisory = VS_NFD_PROFILE_ADVISORY.map(keyOf);
+    expect(new Set(catalog).size).toBe(catalog.length);
+    expect(new Set(advisory).size).toBe(advisory.length);
+    expect(catalog.filter((key) => advisory.includes(key))).toEqual([]);
+  });
+
+  it('describes every predicate for display', () => {
+    for (const entry of VS_NFD_PROFILE) {
+      expect(describeCompliance(entry.compliance)).not.toBe('');
+    }
+  });
+});

packages/shared/src/vs-nfd-profile.ts

@@ -0,0 +1,225 @@
+import { z } from 'zod';
+
+/**
+ * The VS-NfD hardening-profile mode and the machine-readable configuration
+ * catalog (issue #243, ADR 0027).
+ *
+ * The deployment declares through `VS_NFD_MODE` how the application treats
+ * configuration options that violate the VS-NfD reference profile
+ * (docs/vs-nfd/50-haertungsleitfaden.md):
+ *
+ * - `off`      — VS-NfD is not a topic; no marking anywhere (the default).
+ * - `marked`   — options stay available, violations are marked (#244).
+ * - `hidden`   — violating options disappear, the hiding is marked (#245).
+ * - `enforced` — violating writes are rejected server-side (#246).
+ *
+ * Deploy-level (env) on purpose, like BACKUP_ALLOWED_TARGETS (#192): a
+ * compromised Site Admin must not be able to widen the mode at runtime.
+ *
+ * The catalog below is the single source of truth for "profile-relevant":
+ * every entry names the setting, the machine-checkable compliant value and
+ * the hardening-guide section it comes from. A fence test keeps catalog
+ * and guide from drifting (vs-nfd-profile-catalogue.test.ts, pattern
+ * #201): every switch listed in the guide is either here or in the
+ * explicit advisory list — never silently absent.
+ */
+export const VS_NFD_MODES = ['off', 'marked', 'hidden', 'enforced'] as const;
+export type VsNfdMode = (typeof VS_NFD_MODES)[number];
+export const vsNfdModeSchema = z.enum(VS_NFD_MODES);
+
+/**
+ * The decidable compliance predicates. Deliberately tiny: a catalog entry
+ * must be checkable without prose interpretation, or it belongs in the
+ * advisory list instead.
+ */
+export type VsNfdCompliance =
+  | { kind: 'equals'; value: boolean | string }
+  | { kind: 'maxNumber'; value: number }
+  | { kind: 'nonEmpty' };
+
+export interface VsNfdProfileEntry {
+  /** `instance` = instance_settings key; `deploy` = env variable. */
+  scope: 'instance' | 'deploy';
+  key: string;
+  compliance: VsNfdCompliance;
+  /** Section of docs/vs-nfd/50-haertungsleitfaden.md the value comes from. */
+  hardeningRef: '1.1' | '1.2';
+}
+
+/**
+ * Profile entries with a machine-checkable compliant value. Order mirrors
+ * the hardening guide. Pond-level opt-ins (`apiEnabled`, `mcpEnabled`)
+ * are deliberately absent: their instance master switches govern, so a
+ * pond opt-in cannot violate the profile on its own (ADR 0027).
+ */
+export const VS_NFD_PROFILE: readonly VsNfdProfileEntry[] = [
+  {
+    scope: 'instance',
+    key: 'auth.registrationMode',
+    compliance: { kind: 'equals', value: 'closed' },
+    hardeningRef: '1.1',
+  },
+  {
+    scope: 'instance',
+    key: 'api.enabled',
+    compliance: { kind: 'equals', value: false },
+    hardeningRef: '1.1',
+  },
+  {
+    scope: 'instance',
+    key: 'mcp.enabled',
+    compliance: { kind: 'equals', value: false },
+    hardeningRef: '1.1',
+  },
+  {
+    scope: 'instance',
+    key: 'feeds.enabled',
+    compliance: { kind: 'equals', value: false },
+    hardeningRef: '1.1',
+  },
+  {
+    scope: 'instance',
+    key: 'plugins.enabled',
+    compliance: { kind: 'equals', value: false },
+    hardeningRef: '1.1',
+  },
+  {
+    scope: 'instance',
+    key: 'classification.newPageDefault',
+    compliance: { kind: 'equals', value: 'vs_nfd' },
+    hardeningRef: '1.1',
+  },
+  {
+    scope: 'instance',
+    key: 'classification.uploadPolicy',
+    compliance: { kind: 'equals', value: 'block' },
+    hardeningRef: '1.1',
+  },
+  {
+    scope: 'instance',
+    key: 'upload.svgPolicy',
+    compliance: { kind: 'equals', value: 'reject' },
+    hardeningRef: '1.1',
+  },
+  {
+    scope: 'instance',
+    key: 'backup.nextcloud.enabled',
+    compliance: { kind: 'equals', value: false },
+    hardeningRef: '1.1',
+  },
+  {
+    scope: 'instance',
+    key: 'readTrail.enabled',
+    compliance: { kind: 'equals', value: true },
+    hardeningRef: '1.1',
+  },
+  {
+    scope: 'instance',
+    key: 'legal.imprint',
+    compliance: { kind: 'nonEmpty' },
+    hardeningRef: '1.1',
+  },
+  {
+    scope: 'instance',
+    key: 'legal.privacyPolicy',
+    compliance: { kind: 'nonEmpty' },
+    hardeningRef: '1.1',
+  },
+  {
+    scope: 'deploy',
+    key: 'SESSION_ABSOLUTE_HOURS',
+    compliance: { kind: 'maxNumber', value: 12 },
+    hardeningRef: '1.2',
+  },
+  {
+    scope: 'deploy',
+    key: 'SESSION_IDLE_HOURS',
+    compliance: { kind: 'maxNumber', value: 2 },
+    hardeningRef: '1.2',
+  },
+  {
+    scope: 'deploy',
+    key: 'LOG_LEVEL',
+    compliance: { kind: 'equals', value: 'info' },
+    hardeningRef: '1.2',
+  },
+  {
+    scope: 'deploy',
+    key: 'AUTH_LOCAL_ENABLED',
+    compliance: { kind: 'equals', value: false },
+    hardeningRef: '1.2',
+  },
+] as const;
+
+/**
+ * Guide entries whose reference value is a judgement call ("only what the
+ * service needs", "configure the agency IdP", "leave unset or one host") —
+ * profile-relevant, but not machine-checkable. Listed explicitly so the
+ * fence test still notices when the guide gains a switch nobody triaged.
+ */
+export const VS_NFD_PROFILE_ADVISORY: readonly { scope: 'instance' | 'deploy'; key: string }[] = [
+  { scope: 'instance', key: 'upload.allowedExtensions' },
+  { scope: 'instance', key: 'trash.retentionDays' },
+  { scope: 'instance', key: 'audit.retentionDays' },
+  { scope: 'instance', key: 'conversion.payloadRetentionDays' },
+  { scope: 'instance', key: 'mail.outboxRetentionDays' },
+  { scope: 'instance', key: 'readTrail.dedupWindowMinutes' },
+  { scope: 'instance', key: 'readTrail.retentionDays' },
+  { scope: 'instance', key: 'idpMapping.rules' },
+  { scope: 'deploy', key: 'VS_NFD_MODE' },
+  { scope: 'deploy', key: 'BACKUP_ALLOWED_TARGETS' },
+  { scope: 'deploy', key: 'SMTP_HOST' },
+  { scope: 'deploy', key: 'WEB_PORT' },
+  { scope: 'deploy', key: 'API_PORT' },
+  { scope: 'deploy', key: 'COLLAB_PORT' },
+  { scope: 'deploy', key: 'OIDC_ISSUER' },
+  { scope: 'deploy', key: 'OIDC_CLIENT_ID' },
+  { scope: 'deploy', key: 'OIDC_CLIENT_SECRET' },
+  { scope: 'deploy', key: 'OIDC_SCOPES' },
+  { scope: 'deploy', key: 'OIDC_PROVIDER_LABEL' },
+  { scope: 'deploy', key: 'AUTH_PROXY_HEADER' },
+  { scope: 'deploy', key: 'AUTH_PROXY_TRUSTED_PEERS' },
+  { scope: 'deploy', key: 'AUTH_PROXY_MAP' },
+  { scope: 'deploy', key: 'AUTH_PROXY_MODE' },
+  { scope: 'deploy', key: 'AUTH_PROXY_DN_ATTRIBUTE' },
+] as const;
+
+/** True when `value` satisfies the entry's compliance predicate. */
+export function isVsNfdCompliant(entry: VsNfdProfileEntry, value: unknown): boolean {
+  switch (entry.compliance.kind) {
+    case 'equals':
+      return value === entry.compliance.value;
+    case 'maxNumber':
+      return typeof value === 'number' && value <= entry.compliance.value;
+    case 'nonEmpty':
+      return typeof value === 'string' && value.trim().length > 0;
+  }
+}
+
+/** One evaluated catalog row, as the admin endpoint reports it (#243). */
+export interface VsNfdProfileEntryView {
+  scope: 'instance' | 'deploy';
+  key: string;
+  compliant: boolean;
+  /** The compliant value, rendered for display (booleans/numbers stringified). */
+  compliantValue: string;
+  hardeningRef: '1.1' | '1.2';
+}
+
+export interface VsNfdProfileView {
+  mode: VsNfdMode;
+  entries: VsNfdProfileEntryView[];
+  violations: number;
+}
+
+/** Display form of a predicate — shared so api and web render it alike. */
+export function describeCompliance(compliance: VsNfdCompliance): string {
+  switch (compliance.kind) {
+    case 'equals':
+      return String(compliance.value);
+    case 'maxNumber':
+      return `<= ${compliance.value}`;
+    case 'nonEmpty':
+      return 'non-empty';
+  }
+}