Merge pull request 'feat/r42-accuracy-and-clear-history' (#34) from feat/r42-accuracy-and-clear-history into main

Reviewed-on: #34

.github/workflows/test.yml

@@ -11,21 +11,25 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      # The test image below swaps in Caddyfile.test, so the production
-      # Caddyfile is otherwise never exercised by CI — an invalid config then
-      # only surfaces when the deploy health-gate fails, after the broken
-      # container already replaced the healthy one (issue #20/#26). Validate
-      # both files up front so a parse error fails the PR check in seconds.
-      - name: Validate Caddyfiles
-        run: |
-          docker run --rm -v "$PWD":/workspace -w /workspace caddy:2-alpine \
-            caddy validate --config Caddyfile --adapter caddyfile
-          docker run --rm -v "$PWD":/workspace -w /workspace caddy:2-alpine \
-            caddy validate --config Caddyfile.test --adapter caddyfile
-
       - name: Build Docker image
         run: docker build -t learning-platform .
 
+      # The production Caddyfile is otherwise never exercised by CI — the test
+      # image below swaps in Caddyfile.test — so a parse error only surfaced at
+      # deploy time, after the broken container had already replaced the healthy
+      # one (issue #20/#26). Validate it here, inside the freshly built image
+      # where it lives at /etc/caddy/Caddyfile. This runs caddy against the
+      # exact file that ships and needs no bind mount — a `-v "$PWD":...` mount
+      # does not propagate to the sibling Docker daemon in the Gitea runner,
+      # which is why the earlier mount-based step failed with
+      # "open Caddyfile: no such file or directory" (#26).
+      # Caddyfile.test needs no separate check: the "Test homepage" step below
+      # runs the test image and fails if that config can't serve.
+      - name: Validate production Caddyfile
+        run: |
+          docker run --rm --entrypoint caddy learning-platform \
+            validate --adapter caddyfile --config /etc/caddy/Caddyfile
+
       - name: Build test image
         run: |
           cat > Dockerfile.test <<'EOF'

docs/auth-spec.md

@@ -39,13 +39,14 @@ Browser (SPA)                PocketBase (auth)                 Entra ID
 | 001 | OIDC-provider tegen Entra v2-endpoints i.p.v. eigen MSAL-flow of header-trust | Sluit aan op "PocketBase = enige backend"; secret server-side; auto-provisioning gratis; werkt los van de perimeter-implementatie |
 | 002 | `team_members` hergebruikt als auth-collection (zelfde naam) | Alle `user_id`-referenties blijven werken; minimale blast-radius |
 | 003 | Provisioning + admin-rol via `pb_hooks/team_members.pb.js` | Rol-logica server-side, niet in de client |
-| 004 | Admin-rol via e-mail-allowlist (`ENTRA_ADMIN_EMAILS`), re-synced elke login | Geen handmatig beheer; allowlist-wijziging werkt bij volgende login |
+| 004 | Admin-rol via e-mail-allowlist (`ENTRA_ADMIN_EMAILS`), **escalate-only** bij elke login (aangepast in #27) | Allow-list garandeert admin (promotie werkt bij volgende login) maar demoteert niet meer — anders zou elke TeamManager-promotie bij de volgende login worden teruggedraaid. Demotie via TeamManager; allow-list-leden demoteer je door ze van de lijst te halen |
 | 005 | API-rules → `@request.auth.id != ""` op alle app-collecties | Geen anonieme toegang meer; admins/users zijn beide geauthenticeerd |
 | 006 | Baseline-ledger-sync migratie voor out-of-band geprovisionede DB's | Labs/prod draaide historisch zonder `--migrationsDir`; replay van de historie crashte PB (issue #18). De vroegst-sorterende migratie markeert de historie als applied wanneer schema bestaat maar de ledger leeg is |
 | 007 | Migratie = structuur, hook = configuratie | De OIDC-provider wordt bij elke start (en per cron-minuut) gereconcilieerd vanuit `ENTRA_*` env door `pb_hooks/entra_oidc.pb.js`; een one-shot migratie die van deploy-time env afhangt kan OAuth2 anders permanent uitschakelen |
 | 008 | Hook-helpers via `require(`${__hooks}/utils.js`)` | De JSVM draait elke hook-callback als geïsoleerd programma; top-level functies zijn níet in scope op call-time |
 | 009 | `createRule: '@request.context = "oauth2"'` op `team_members` | PocketBase past de createRule toe op de OAuth2-sign-up (eerste login maakt het record aan); `null` blokkeerde élke eerste login met 403 (issue #22). De context-rule staat alléén de OAuth2-flow toe — anonieme REST-creates blijven geweigerd |
 | 010 | Claims uit het Entra **id_token** (`userInfoURL: ""`) + UPN-fallback voor e-mail | Graph `/oidc/userinfo` geeft géén `email`-claim voor accounts zonder mail-attribuut → 400 bij eerste login (issue #24). Het id_token bevat altijd `preferred_username` (UPN = primair e-mailadres bij Respellion); `entra_oidc.pb.js` gebruikt die als fallback (regex-guard tegen guest-UPN's) en logt gefaalde OAuth2-pogingen naar de containerlog |
+| 011 | `updateRule: '(@request.auth.id = id && @request.body.role:isset = false) \|\| @request.auth.role = "admin"'`, `deleteRule: '@request.auth.role = "admin"'` | TeamManager-rosterbeheer werkt nu voor app-admins (issue #27). De `role:isset`-guard sluit tegelijk de privilege-escalatie waarbij een gebruiker zijn eigen `role` naar admin kon patchen; onboarding raakt `role` niet en blijft self-service |
 
 ## Bestanden
 
@@ -55,6 +56,7 @@ Browser (SPA)                PocketBase (auth)                 Entra ID
 | `pb_migrations/1781000000_team_members_to_auth.js` | Converteert relation-velden naar text (data blijft behouden), dropt de oude PIN-collection en maakt `team_members` als auth-collection. Idempotent; provider wordt alleen als fast-path meegenomen als de env al aanwezig is. |
 | `pb_migrations/1781000001_tighten_api_rules.js` | Zet alle niet-systeem-collecties op `@request.auth.id != ""`. |
 | `pb_migrations/1781000002_allow_oauth2_signup.js` | Zet `createRule = '@request.context = "oauth2"'` op reeds-gemigreerde omgevingen (issue #22). |
+| `pb_migrations/1781000003_team_members_admin_rules.js` | Admin-rosterbeheer + role-escalatie-guard op reeds-gemigreerde omgevingen (issue #27). |
 | `pb_hooks/entra_oidc.pb.js` | Reconcilieert de OIDC-provider vanuit `ENTRA_*` env bij elke start + cron-tick (compare-before-save). |
 | `pb_hooks/utils.js` | Gedeelde helpers (`resolveRole`, `reconcileEntraOidc`) — per callback binnenhalen via `require()`. |
 | `pb_hooks/team_members.pb.js` | Auto-provisioning (`role`, `enrollment_status`, naam-fallback) + admin-rol re-sync. |

docs/data-model.md

@@ -212,6 +212,34 @@ Best-effort telemetry for every Anthropic call (written by `callLLM`).
 
 ---
 
+### `onboarding_overviews`
+Cached, breadth-first per-theme overview for the onboarding track (issue #30).
+One row per theme, shared across all users. Generated lazily on first open.
+
+| Field | Type | Notes |
+|---|---|---|
+| theme | text | canonical theme name (from `topics.theme`); **unique** |
+| content | json | validated `onboardingOverviewSchema` payload (title, what_it_is, why_it_matters, key_points, topics_covered) |
+| topics_fingerprint | text | stable hash of the theme's sorted topic ids; a mismatch triggers regeneration |
+
+Unique index on `(theme)`. Rules: authenticated-only (`@request.auth.id != ""`).
+
+---
+
+### `onboarding_completions`
+Per-user, per-theme completion marker for the onboarding track (issue #30).
+
+| Field | Type | Notes |
+|---|---|---|
+| team_member_id | text | the employee — **plain text**, not a relation (admins can delete members; orphan rows are harmless) |
+| theme | text | the theme marked complete |
+
+Unique index on `(team_member_id, theme)` → idempotent. Rules: authenticated-only.
+Completion is tracked per **theme**, not per day; the 5 "days" are a read-time
+presentation grouping, so re-chunking never loses progress.
+
+---
+
 ## Dropped / legacy collections
 
 These existed in earlier iterations and have been removed. Their `db.js` helpers

docs/frontend-spec.md

@@ -10,8 +10,9 @@ A React 19 SPA built with Vite, routed by React Router 7. Entry: `src/main.jsx`
 | Route | Screen | Access |
 |---|---|---|
 | `/login` | `Login.jsx` | public |
-| `/onboarding` | `Onboarding.jsx` | logged-in, not yet enrolled |
+| `/onboarding` | `Onboarding.jsx` | logged-in, not yet enrolled (enrollment page) |
 | `/` | `Dashboard.jsx` | enrolled user |
+| `/onboarding-track` | `OnboardingTrack.jsx` | any logged-in user, **any enrollment** (`skipEnrollmentGate`) |
 | `/learn` | `Leren.jsx` | enrolled user |
 | `/test` | `Testen.jsx` | enrolled user |
 | `/leaderboard` | `Leaderboard.jsx` | enrolled user |
@@ -20,9 +21,14 @@ A React 19 SPA built with Vite, routed by React Router 7. Entry: `src/main.jsx`
 `ProtectedRoute`:
 - redirects to `/login` if not authenticated;
 - redirects to `/onboarding` if `enrollment_status !== 'active'` — **except** admins
-  heading to the admin panel, who are exempt;
+  heading to the admin panel, and routes passing `skipEnrollmentGate` (the onboarding
+  track), which are exempt;
 - enforces `requireAdmin` for `/admin`.
 
+> `/onboarding` (enrollment) and `/onboarding-track` (the 5-day theme intro) are
+> distinct. The track is decoupled from enrollment on purpose so it also works as a
+> refresher for existing staff.
+
 Navigation chrome (top bar + mobile bottom nav) is rendered by `ProtectedRoute`.
 `ChatLauncher` (R42) is mounted globally.
 
@@ -51,7 +57,17 @@ enrolled are redirected to `/`. See `docs/curriculum-spec.md`.
 ## Employee screens
 
 - **Dashboard** — current cycle/week, assigned topic, cycle progress ring, quick
-  links to Learn and Test, mini leaderboard, recent activity.
+  links to Learn and Test, mini leaderboard, recent activity. The dismissible
+  "New here?" explainer card also carries the **onboarding-track CTA** (a progress
+  chip `X/5 days` + a Start/Continue/Review button linking to `/onboarding-track`),
+  shown only when the KB has themes to introduce.
+- **Onboarding Track (`/onboarding-track`)** — a self-paced, breadth-first tour of
+  every theme, grouped into ≤5 day cards (`OnboardingTrack.jsx`). Opening a theme
+  lazily generates a short overview (what it is / why it matters for daily & weekly
+  work / key points / topics) and offers "Mark as done"; a progress ring + day bar
+  track completion, and a completion banner shows when every theme is done. Available
+  to any logged-in user regardless of enrollment; completion is stored per theme in
+  `onboarding_completions`. See `docs/generation-spec.md §D`.
 - **Learning Station (`/learn`)** — the week's required topic + the rest of the
   knowledge library; opening a topic shows the micro-learning selector
   (`src/components/micro_learning/`). Completing ≥1 micro-learning marks the week done.

docs/generation-spec.md

@@ -74,6 +74,29 @@ explanation, difficulty }`.
 
 ---
 
+## D. Onboarding overviews — `src/lib/onboardingService.js`
+
+Powers the 5-day onboarding track (issue #30): a short, breadth-first overview of
+**one theme** for a brand-new employee — deliberately light, not a deep lesson.
+
+- **Tool:** `emit_onboarding_overview` · **tier:** `fast` (Haiku) · `maxTokens: 1500`,
+  60s timeout · schema `onboardingOverviewSchema`.
+- **Shape:** `{ title, what_it_is, why_it_matters, key_points[3–5], topics_covered[{topic_id,label}] }`.
+  `why_it_matters` is framed around day-to-day / week-to-week work at Respellion.
+- **Cache:** `onboarding_overviews`, one row per theme, keyed by theme name plus a
+  `topics_fingerprint` (stable hash of the theme's sorted topic ids).
+  `getOrGenerateOnboardingOverview(theme, topics, {force})` returns the cached row when
+  the fingerprint matches; a mismatch (topic added/removed) or `force` regenerates.
+- **Simulation:** `emit_onboarding_overview` has a stub in `SIMULATION_TOOL_STUBS`.
+
+Theme ordering + day grouping are pure helpers in the same module
+(`orderThemes`, `distributeThemesIntoDays`, `computeTopicsFingerprint`,
+`computeOnboardingProgress`, `buildOnboardingPlan`), unit-tested in
+`src/lib/__tests__/onboardingService.test.js`. Completion is recorded per **theme**
+in `onboarding_completions` (`{ team_member_id, theme }`), not per day.
+
+---
+
 ## Shared infrastructure (`src/lib/llm.js`)
 
 - **Tiers:** `fast` (Haiku 4.5), `standard` (Sonnet 4.6), `reasoning` (Opus 4.7);

docs/r42-spec.md

@@ -18,6 +18,8 @@ client-side and is grounded by local TF-IDF retrieval — **no vector database**
   context is truncated with a notice.
 - A greeting message seeds an empty thread.
 - Each turn calls `callLLM` (fast/standard Claude tier — low latency matters for chat).
+- The chat header has a **clear** button (trash icon). It confirms, then wipes
+  `chat:thread:{userId}` and reseeds the greeting via `clearThread` in `useChat.js`.
 
 ---
 
@@ -25,13 +27,21 @@ client-side and is grounded by local TF-IDF retrieval — **no vector database**
 
 `buildKbContext` in `rag.js`:
 1. Build / reuse the TF-IDF index over `topics` (`src/lib/retrieval.js`).
-2. Retrieve the top **10** topics for the user's message.
+2. Retrieve the top **10** topics for the user's message. Scoring is exact-token
+   TF-IDF **plus a compound-word fallback**: an unmatched query token (≥6 chars)
+   also matches a document term when they share a ≥6-char stem or one contains
+   the other, at a reduced weight. This recovers Dutch compounds — e.g. a
+   `pensioen` query matches `pensioenregeling` and `partnerpensioen`.
 3. Always include topics whose `id` or `label` appears verbatim in the message.
 4. Include relations only when **both** endpoints are in the retrieved set.
-5. For explicitly mentioned topics, inject up to ~1200 chars of their generated
-   content.
+5. Inject up to ~1000 chars of generated content for up to **5** topics —
+   verbatim-mentioned first, then the highest-ranked retrieved ones — so a query
+   that never names a topic exactly still gets rich content for what it matched.
 6. Append a short KB hash so the cached context busts when topics change.
 
+If the summarised context is still too thin, R42 can call the `lookup_topic`
+tool to pull a topic's full description and learning content on demand.
+
 The system prompt (`prompts.js`) is assembled as cacheable blocks: a stable
 preamble (role, tasks, style, "answer only from the KB"), the KB context block, and
 a per-turn tail with the user's name and admin/non-admin flag.

knowledge-base/pensioenpremie-proforma-berekening.md

@@ -0,0 +1,118 @@
+# pensioenpremie berekenen en verwerken in een proforma-loonstrook
+
+## doel
+
+Handleiding voor het handmatig berekenen en verwerken van de pensioenpremie bij het
+opstellen van een proforma-salarisspecificatie in NMBRS, wanneer de pensioengrondslag
+niet automatisch op de proforma-berekening verschijnt.
+
+## wanneer van toepassing
+
+Bij het opstellen van een proforma-loonstrook (bijvoorbeeld ter voorbereiding van een
+aanbod aan een kandidaat) toont NMBRS geen automatische pensioenpremie-regel. Deze moet
+dan handmatig worden toegevoegd volgens onderstaande methode.
+
+## benodigde gegevens vooraf
+
+Voordat je begint moet je de volgende vier parameters hebben. Geen van deze staat op de
+proforma zelf.
+
+| parameter | waar te vinden |
+| --- | --- |
+| pensioenfranchise (Respellion / a.s.r. Doen Pensioen) | `pension-scheme-and-benefits.md` of het a.s.r.-polisblad; kan afwijken van het wettelijk minimum |
+| verdeelsleutel werkgever/werknemer | `pension-scheme-and-benefits.md` of het a.s.r.-contract |
+| definitie pensioengevend salaris | a.s.r.-polisvoorwaarden — bevestig welke looncomponenten meetellen (onkostenvergoedingen in elk geval niet) |
+| fiscaal maximum pensioengevend salaris (aftoppingsgrens) | jaarlijkse publicatie belastingdienst/SZW, zie tabel hieronder |
+
+Deze vier punten waren bij het opstellen van dit document nog niet allemaal bevestigd
+voor Respellion specifiek — zie "openstaande vragen" onderaan.
+
+## rekenstappen
+
+1. **pensioengevend salaris (jaarbasis) bepalen**
+   Standaard: 12 × maandsalaris + vakantietoeslag (8%).
+   `pensioengevend salaris = 12 × bruto maandsalaris × 1,08`
+   Onkostenvergoedingen (reiskosten, telefoonvergoeding) tellen niet mee.
+
+2. **aftoppen op het fiscaal maximum**
+   `gemaximeerd pensioengevend salaris = min(pensioengevend salaris, aftoppingsgrens)`
+
+3. **franchise aftrekken**
+   `pensioengrondslag = gemaximeerd pensioengevend salaris − franchise`
+
+4. **parttimefactor toepassen**
+   `pensioengrondslag (parttime) = pensioengrondslag × parttimefactor`
+   Parttimefactor = contracturen / 40 (of de fulltime-norm die Respellion hanteert).
+
+5. **premie berekenen**
+   `jaarpremie = pensioengrondslag (parttime) × 5%`
+   `maandpremie = jaarpremie / 12`
+
+6. **verdelen werkgever/werknemer**
+   `werknemersdeel = maandpremie × werknemerspercentage`
+   `werkgeversdeel = maandpremie − werknemersdeel`
+
+## fiscale kernbedragen 2026
+
+| bedrag | waarde 2026 | bron |
+| --- | --- | --- |
+| aftoppingsgrens pensioengevend salaris | € 137.800 | belastingdienst/SZW, voorlopige bedragen 2026 |
+| minimale AOW-franchise (Wtp-regelingen / beschikbare premieregelingen) | € 19.172 | belastingdienst/SZW, voorlopige bedragen 2026 |
+
+Deze twee bedragen worden jaarlijks (eind december) opnieuw gepubliceerd. Controleer bij
+elke proforma-berekening of de bedragen nog actueel zijn.
+
+## verwerking in NMBRS — fiscale nuance
+
+Het werknemersdeel van de pensioenpremie is een pre-tax inhouding:
+
+- het verlaagt de grondslag voor de loonheffing (de kolom "Tabel" op de proforma-uitdraai)
+- het verlaagt **niet** het SV-loon (de kolom "SVW" blijft ongewijzigd)
+
+Trek het werknemersdeel dus niet rechtstreeks af van het bestaande netto-bedrag. Voer de
+premie in met dezelfde paycode die in de reguliere (niet-proforma) loonrun voor
+pensioenpremie werknemer/werkgever is ingericht — controleer de codeconfiguratie in
+NMBRS (niet de bedragen) op de vlag "aftrekbaar voor loonheffing, niet voor SVW". Laat
+NMBRS de loonheffing zelf herberekenen over de verlaagde grondslag; reken dit niet
+handmatig na.
+
+Het werkgeversdeel is een werkgeverslast (vergelijkbaar met de bestaande WGA/Aof-regels
+op de proforma) en raakt het netto van de werknemer niet, wel de totale loonkosten.
+
+## rekenvoorbeeld
+
+Uitgangspunt: proforma fulltime (40 uur/week), bruto maandsalaris € 6.700, 100%
+dienstverband.
+
+1. Pensioengevend salaris (jaar): 12 × 6.700 × 1,08 = € 86.832
+2. Aftopping: 86.832 < 137.800 → geen aftopping
+3. Franchise (voorbeeld met het wettelijk minimum € 19.172 — niet bevestigd als
+   Respellion-waarde): 86.832 − 19.172 = € 67.660
+4. Parttimefactor: 100% → geen aanpassing
+5. Premie: 67.660 × 5% = € 3.383 per jaar = € 281,92 per maand
+6. Verdeling (voorbeeld 50/50 — verdeelsleutel niet bevestigd): € 140,96 werknemer,
+   € 140,96 werkgever
+
+Dit rekenvoorbeeld gebruikt aannames voor franchise en verdeelsleutel die nog niet
+bevestigd zijn voor Respellion — zie "openstaande vragen".
+
+## openstaande vragen
+
+- Exacte pensioenfranchise van de Respellion a.s.r. Doen Pensioen-regeling (mogelijk
+  hoger dan het wettelijk minimum van € 19.172).
+- Verdeelsleutel werkgever/werknemer voor de 5% premie.
+- Of vakantietoeslag standaard meetelt in het pensioengevend salaris volgens de
+  a.s.r.-polis, of dat er een afwijkende definitie geldt.
+- Exacte NMBRS-paycode voor pensioenpremie werknemer/werkgever (te vinden in een
+  bestaande productierun of de paycode-lijst).
+
+Zodra deze vier punten bevestigd zijn, kan dit document worden aangevuld met de
+definitieve waarden in plaats van de wettelijke minimum-aannames.
+
+## bronnen
+
+- Proforma-salarisspecificatie Respellion B.V. (voorbeeldcasus, dit document)
+- Belastingdienst/SZW: voorlopige bedragen AOW-franchise en maximum pensioengevend
+  salaris 2026
+- `pension-scheme-and-benefits.md` (Respellion-handboek) — te raadplegen voor de
+  resterende openstaande vragen

pb_hooks/team_members.pb.js

@@ -41,14 +41,17 @@ onRecordCreate(function (e) {
   e.next();
 }, "team_members");
 
-// On every successful auth (incl. OIDC): keep the admin role in sync with the
-// allow-list, so promoting/demoting an admin only requires an env change.
+// On every successful auth (incl. OIDC): guarantee the admin role for
+// allow-list members. ESCALATE-ONLY (#27): the allow-list grants admin, it no
+// longer demotes — otherwise every role promotion made through TeamManager
+// would be reverted on the member's next login. Demotion runs through
+// TeamManager; allow-list members cannot be demoted (the list wins on their
+// next login).
 onRecordAuthRequest(function (e) {
   const { resolveRole } = require(`${__hooks}/utils.js`);
   const email = e.record.get("email") || "";
-  const want = resolveRole(email);
-  if (e.record.get("role") !== want) {
-    e.record.set("role", want);
+  if (resolveRole(email) === "admin" && e.record.get("role") !== "admin") {
+    e.record.set("role", "admin");
     e.app.save(e.record);
   }
   e.next();

pb_migrations/1781000000_team_members_to_auth.js

@@ -151,8 +151,10 @@ migrate((app) => {
     listRule:   '@request.auth.id != ""',
     viewRule:   '@request.auth.id != ""',
     createRule: '@request.context = "oauth2"',
-    updateRule: '@request.auth.id = id',
-    deleteRule: null,
+    // Self-update may not touch `role` (closes self-service privilege
+    // escalation); admins manage the roster incl. roles and deletion (#27).
+    updateRule: '(@request.auth.id = id && @request.body.role:isset = false) || @request.auth.role = "admin"',
+    deleteRule: '@request.auth.role = "admin"',
     authRule:   "",
     manageRule: null,
 

pb_migrations/1781000003_team_members_admin_rules.js

@@ -0,0 +1,52 @@
+/// <reference path="../pb_data/types.d.ts" />
+//
+// Issue #27 — TeamManager roster management + close role self-escalation.
+//
+// The collection shipped with `updateRule: '@request.auth.id = id'` and
+// `deleteRule: null`. That broke the TeamManager admin panel (admins could
+// not change roles or remove members) AND left a privilege escalation open:
+// the self-update rule did not restrict fields, so any authenticated user
+// could PATCH their own `role` to "admin".
+//
+// New rules:
+//   update — a user may update their own record but NOT the `role` field
+//            (onboarding only touches enrollment fields); admins may update
+//            anyone, including `role`.
+//   delete — admins only.
+//
+// Environments that have not applied 1781000000 yet get these rules directly
+// from that (updated) migration; this follow-up exists for databases where it
+// already ran (Labs). Applying both is harmless (same values).
+const UPDATE_RULE = '(@request.auth.id = id && @request.body.role:isset = false) || @request.auth.role = "admin"';
+const DELETE_RULE = '@request.auth.role = "admin"';
+
+migrate((app) => {
+  let col;
+  try {
+    col = app.findCollectionByNameOrId("team_members");
+  } catch (_) {
+    console.log("team_members_admin_rules: team_members does not exist — skipping.");
+    return;
+  }
+  if (col.type !== "auth") {
+    console.log("team_members_admin_rules: team_members is not an auth collection — skipping.");
+    return;
+  }
+  col.updateRule = UPDATE_RULE;
+  col.deleteRule = DELETE_RULE;
+  app.save(col);
+}, (app) => {
+  // Down: restore the previous (self-update only, superuser delete) rules.
+  let col;
+  try {
+    col = app.findCollectionByNameOrId("team_members");
+  } catch (_) {
+    return;
+  }
+  if (col.type !== "auth") {
+    return;
+  }
+  col.updateRule = '@request.auth.id = id';
+  col.deleteRule = null;
+  app.save(col);
+});

pb_migrations/1781200000_created_onboarding.js

@@ -0,0 +1,189 @@
+/// <reference path="../pb_data/types.d.ts" />
+//
+// Issue #30 — Onboarding track (5-day, theme-level introduction).
+//
+// Two collections:
+//   onboarding_overviews    — cached per-theme overview content (one row per theme),
+//                             keyed by the theme name, with a topics_fingerprint for
+//                             staleness detection / regeneration.
+//   onboarding_completions  — per-user, per-theme completion marker.
+//
+// Design notes (consistent with issues #18/#27):
+//   * team_member_id is a plain TEXT field, NOT a relation — admins can delete
+//     team_members, and a relation with cascadeDelete would otherwise block that
+//     delete / drag the collection into the migration graph. Completions are keyed
+//     by (team_member_id, theme); orphan rows after a member delete are harmless.
+//   * API rules are set EXPLICITLY to authenticated-only. The tighten-rules
+//     migration (1781000001) already ran against the collections that existed then,
+//     so new collections must lock themselves down or they default to public.
+const AUTHED = '@request.auth.id != ""';
+
+migrate((app) => {
+  const overviews = new Collection({
+    "id": "pbc_onboarding_overviews0",
+    "name": "onboarding_overviews",
+    "type": "base",
+    "system": false,
+    "fields": [
+      {
+        "autogeneratePattern": "[a-z0-9]{15}",
+        "hidden": false,
+        "id": "text_id_oov",
+        "max": 15,
+        "min": 15,
+        "name": "id",
+        "pattern": "^[a-z0-9]+$",
+        "presentable": false,
+        "primaryKey": true,
+        "required": true,
+        "system": true,
+        "type": "text"
+      },
+      {
+        "system": false,
+        "id": "text_theme_oov",
+        "name": "theme",
+        "type": "text",
+        "required": true,
+        "presentable": false,
+        "max": 0,
+        "min": 0,
+        "pattern": ""
+      },
+      {
+        "system": false,
+        "id": "json_content_oov",
+        "name": "content",
+        "type": "json",
+        "required": true,
+        "presentable": false
+      },
+      {
+        "system": false,
+        "id": "text_fingerprint_oov",
+        "name": "topics_fingerprint",
+        "type": "text",
+        "required": true,
+        "presentable": false,
+        "max": 0,
+        "min": 0,
+        "pattern": ""
+      },
+      {
+        "hidden": false,
+        "id": "autodate_created_oov",
+        "name": "created",
+        "onCreate": true,
+        "onUpdate": false,
+        "presentable": false,
+        "system": true,
+        "type": "autodate"
+      },
+      {
+        "hidden": false,
+        "id": "autodate_updated_oov",
+        "name": "updated",
+        "onCreate": true,
+        "onUpdate": true,
+        "presentable": false,
+        "system": true,
+        "type": "autodate"
+      }
+    ],
+    "indexes": [
+      "CREATE UNIQUE INDEX `idx_onboarding_overviews_theme` ON `onboarding_overviews` (`theme`)"
+    ],
+    "listRule": AUTHED,
+    "viewRule": AUTHED,
+    "createRule": AUTHED,
+    "updateRule": AUTHED,
+    "deleteRule": AUTHED
+  });
+
+  app.save(overviews);
+
+  const completions = new Collection({
+    "id": "pbc_onboarding_completions0",
+    "name": "onboarding_completions",
+    "type": "base",
+    "system": false,
+    "fields": [
+      {
+        "autogeneratePattern": "[a-z0-9]{15}",
+        "hidden": false,
+        "id": "text_id_ocp",
+        "max": 15,
+        "min": 15,
+        "name": "id",
+        "pattern": "^[a-z0-9]+$",
+        "presentable": false,
+        "primaryKey": true,
+        "required": true,
+        "system": true,
+        "type": "text"
+      },
+      {
+        "system": false,
+        "id": "text_ocp_team_member",
+        "name": "team_member_id",
+        "type": "text",
+        "required": true,
+        "presentable": false,
+        "max": 0,
+        "min": 0,
+        "pattern": ""
+      },
+      {
+        "system": false,
+        "id": "text_ocp_theme",
+        "name": "theme",
+        "type": "text",
+        "required": true,
+        "presentable": false,
+        "max": 0,
+        "min": 0,
+        "pattern": ""
+      },
+      {
+        "hidden": false,
+        "id": "autodate_created_ocp",
+        "name": "created",
+        "onCreate": true,
+        "onUpdate": false,
+        "presentable": false,
+        "system": true,
+        "type": "autodate"
+      },
+      {
+        "hidden": false,
+        "id": "autodate_updated_ocp",
+        "name": "updated",
+        "onCreate": true,
+        "onUpdate": true,
+        "presentable": false,
+        "system": true,
+        "type": "autodate"
+      }
+    ],
+    "indexes": [
+      "CREATE UNIQUE INDEX `idx_onboarding_completions_user_theme` ON `onboarding_completions` (`team_member_id`, `theme`)"
+    ],
+    "listRule": AUTHED,
+    "viewRule": AUTHED,
+    "createRule": AUTHED,
+    "updateRule": AUTHED,
+    "deleteRule": AUTHED
+  });
+
+  app.save(completions);
+
+}, (app) => {
+  const completions = app.findCollectionByNameOrId("onboarding_completions");
+  if (completions) {
+    app.delete(completions);
+  }
+  const overviews = app.findCollectionByNameOrId("onboarding_overviews");
+  if (overviews) {
+    app.delete(overviews);
+  }
+})

scripts/setup-pb-collections.mjs

@@ -14,6 +14,8 @@ if (!ADMIN_EMAIL || !ADMIN_PASSWORD) {
 }
 
 const OPEN_RULES = { listRule: '', viewRule: '', createRule: '', updateRule: '', deleteRule: '' };
+const AUTHED = '@request.auth.id != ""';
+const AUTHED_RULES = { listRule: AUTHED, viewRule: AUTHED, createRule: AUTHED, updateRule: AUTHED, deleteRule: AUTHED };
 
 // PocketBase v0.23: created/updated must be explicitly defined as autodate fields
 const AUTODATE_FIELDS = [
@@ -114,6 +116,10 @@ const COLLECTIONS = [
     // Mirror of pb_migrations/1781000002: creation only via the OAuth2
     // sign-up flow (issue #22).
     createRule: '@request.context = "oauth2"',
+    // Mirror of pb_migrations/1781000003: self-update without role changes;
+    // roster management (incl. role/delete) is admin-only (issue #27).
+    updateRule: '(@request.auth.id = id && @request.body.role:isset = false) || @request.auth.role = "admin"',
+    deleteRule: '@request.auth.role = "admin"',
     passwordAuth: { enabled: false, identityFields: ['email'] },
     fields: [
       { name: 'name', type: 'text', required: false },
@@ -200,6 +206,32 @@ const COLLECTIONS = [
       ...AUTODATE_FIELDS,
     ],
   },
+  // Onboarding track (issue #30). Owned by pb_migrations/1781200000; these are a
+  // fallback for envs where migrations have not run. Authenticated-only rules
+  // (mirrors the migration) — do NOT use OPEN_RULES here.
+  {
+    name: 'onboarding_overviews',
+    type: 'base',
+    ...AUTHED_RULES,
+    fields: [
+      { name: 'theme',              type: 'text', required: true },
+      { name: 'content',            type: 'json', required: true },
+      { name: 'topics_fingerprint', type: 'text', required: true },
+      ...AUTODATE_FIELDS,
+    ],
+    indexes: ['CREATE UNIQUE INDEX `idx_onboarding_overviews_theme` ON `onboarding_overviews` (`theme`)'],
+  },
+  {
+    name: 'onboarding_completions',
+    type: 'base',
+    ...AUTHED_RULES,
+    fields: [
+      { name: 'team_member_id', type: 'text', required: true },
+      { name: 'theme',          type: 'text', required: true },
+      ...AUTODATE_FIELDS,
+    ],
+    indexes: ['CREATE UNIQUE INDEX `idx_onboarding_completions_user_theme` ON `onboarding_completions` (`team_member_id`, `theme`)'],
+  },
 ];
 
 async function post(path, body, token) {

src/App.jsx

@@ -7,6 +7,7 @@ import ChatLauncher from './components/chat/ChatLauncher'
 
 import Login from './pages/Login'
 import Onboarding from './pages/Onboarding'
+import OnboardingTrack from './pages/OnboardingTrack'
 import Dashboard from './pages/Dashboard'
 
 import Admin from './pages/Admin'
@@ -106,6 +107,10 @@ function App() {
         <Route path="/login" element={<Login />} />
         <Route path="/onboarding" element={<Onboarding />} />
         <Route path="/" element={<ProtectedRoute><Dashboard /></ProtectedRoute>} />
+        {/* Onboarding track is available to any logged-in user, regardless of
+            enrollment — hence skipEnrollmentGate (distinct from /onboarding, the
+            enrollment page). */}
+        <Route path="/onboarding-track" element={<ProtectedRoute skipEnrollmentGate><OnboardingTrack /></ProtectedRoute>} />
         <Route path="/learn" element={<ProtectedRoute><Leren /></ProtectedRoute>} />
         <Route path="/test" element={<ProtectedRoute><Testen /></ProtectedRoute>} />
         <Route path="/topic-test" element={<ProtectedRoute><TopicTest /></ProtectedRoute>} />

src/components/admin/TeamManager.jsx

@@ -8,10 +8,11 @@ import { useApp } from '../../store/AppContext';
 
 // Users are provisioned automatically on first Azure (Entra ID) login — admins
 // no longer create them by hand. This panel lets an admin review the roster,
-// switch a member between user/admin, and remove members. The admin role is
-// also re-synced from the ENTRA_ADMIN_EMAILS allow-list on every login (see
-// pb_hooks/team_members.pb.js), so a manual change here can be overridden on
-// the member's next sign-in if their e-mail is on/off that list.
+// switch a member between user/admin, and remove members. The
+// ENTRA_ADMIN_EMAILS allow-list is escalate-only (see
+// pb_hooks/team_members.pb.js): it guarantees admin for its members on every
+// login, so promotions made here stick, but demoting an allow-list member is
+// undone on their next sign-in — remove them from the list instead.
 const TeamManager = () => {
   const { state } = useApp();
   const [users, setUsers] = useState([]);
@@ -67,8 +68,9 @@ const TeamManager = () => {
         <p className="text-sm text-fg-muted flex items-start gap-2">
           <Info size={16} className="mt-0.5 shrink-0 text-teal" />
           Team members are created automatically when they first sign in with their
-          Microsoft account. Admins are granted via the <code>ENTRA_ADMIN_EMAILS</code>{' '}
-          allow-list and re-synced on each login.
+          Microsoft account. Members of the <code>ENTRA_ADMIN_EMAILS</code> allow-list
+          are always admin; promotions made here stick, but demoting an allow-list
+          member is undone on their next sign-in.
         </p>
       </Card>
 

src/components/chat/ChatWindow.jsx

@@ -1,4 +1,5 @@
 import { useCallback, useEffect, useRef, useState } from 'react';
+import { Trash2 } from 'lucide-react';
 import Mark from '../ui/Mark';
 import ChatMessage from './ChatMessage';
 import { useChat } from './useChat';
@@ -6,7 +7,7 @@ import { kbStore } from '../../lib/kbStore';
 import { BOT_NAME, STRINGS } from './prompts';
 
 export default function ChatWindow({ user, isAdmin, onClose }) {
-  const { messages, isThinking, send } = useChat({ user, isAdmin });
+  const { messages, isThinking, send, clearThread } = useChat({ user, isAdmin });
   const [draft, setDraft] = useState('');
   const bodyRef = useRef(null);
   const inputRef = useRef(null);
@@ -60,6 +61,14 @@ export default function ChatWindow({ user, isAdmin, onClose }) {
     setDecided(prev => ({ ...prev, [msgId]: 'rejected' }));
   }, []);
 
+  const handleClear = useCallback(() => {
+    if (isThinking) return;
+    if (!window.confirm(STRINGS.clearConfirm)) return;
+    setDecided({});
+    clearThread();
+    inputRef.current?.focus();
+  }, [isThinking, clearThread]);
+
   const renderedMessages = messages.map(m => {
     if (!m.suggestion) return m;
     const status = decided[m.id] || m.suggestion.status || 'pending';
@@ -81,14 +90,26 @@ export default function ChatWindow({ user, isAdmin, onClose }) {
           <div className="r42-window-hd-name">{BOT_NAME}</div>
           <div className="r42-window-hd-status"><i /> {STRINGS.status}</div>
         </div>
-        <button
-          type="button"
-          className="r42-window-hd-x"
-          onClick={onClose}
-          aria-label={STRINGS.closeAria}
-        >
-          ×
-        </button>
+        <div className="r42-window-hd-actions">
+          <button
+            type="button"
+            className="r42-window-hd-clear"
+            onClick={handleClear}
+            disabled={isThinking}
+            aria-label={STRINGS.clearAria}
+            title={STRINGS.clearAria}
+          >
+            <Trash2 size={16} />
+          </button>
+          <button
+            type="button"
+            className="r42-window-hd-x"
+            onClick={onClose}
+            aria-label={STRINGS.closeAria}
+          >
+            ×
+          </button>
+        </div>
       </header>
 
       <div className="r42-window-body" ref={bodyRef}>

src/components/chat/__tests__/rag.test.js

@@ -0,0 +1,63 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+// In-memory KB the mocked db serves from.
+const store = {
+  topics: [],
+  relations: [],
+  content: new Map(),
+};
+
+vi.mock('../../../lib/db', () => ({
+  getTopics: vi.fn(async () => store.topics),
+  getRelations: vi.fn(async () => store.relations),
+  getContent: vi.fn(async (id) => store.content.get(id) ?? null),
+}));
+
+import { buildKbContext } from '../rag';
+
+beforeEach(() => {
+  store.topics = [];
+  store.relations = [];
+  store.content = new Map();
+});
+
+describe('buildKbContext', () => {
+  it('reports an empty graph', async () => {
+    const { context, allTopics } = await buildKbContext('pensioen');
+    expect(context).toMatch(/leeg/);
+    expect(allTopics).toEqual([]);
+  });
+
+  it('injects deep content for a retrieved topic that is not named verbatim', async () => {
+    store.topics = [
+      { id: 'pensioenregeling', label: 'Pensioenregeling', type: 'concept', description: 'De beschikbare premieregeling.' },
+      { id: 'onboarding-buddy', label: 'Onboarding Buddy', type: 'role', description: 'Begeleidt nieuwe medewerkers.' },
+    ];
+    store.content.set('pensioenregeling', {
+      article: 'De premie is 10% van de pensioengrondslag; werkgever en werknemer betalen elk 50%.',
+    });
+
+    // "pensioen" is never a verbatim topic id/label, but the compound-word
+    // matching should retrieve pensioenregeling and pull its article body in.
+    const { context, retrievedTopics } = await buildKbContext('wat dekt mijn pensioen?');
+
+    expect(retrievedTopics.map(t => t.id)).toContain('pensioenregeling');
+    expect(context).toMatch(/DIEPERE INHOUD/);
+    expect(context).toMatch(/10% van de pensioengrondslag/);
+  });
+
+  it('only includes relations whose endpoints are both in the selection', async () => {
+    store.topics = [
+      { id: 'pensioenregeling', label: 'Pensioenregeling', type: 'concept', description: 'De beschikbare premieregeling.' },
+      { id: 'partnerpensioen', label: 'Partnerpensioen', type: 'concept', description: 'Uitkering aan de partner.' },
+    ];
+    store.relations = [
+      { source: 'partnerpensioen', target: 'pensioenregeling', type: 'part_of' },
+      { source: 'pensioenregeling', target: 'iets-anders', type: 'related_to' },
+    ];
+
+    const { context } = await buildKbContext('pensioen');
+    expect(context).toMatch(/partnerpensioen --part_of--> pensioenregeling/);
+    expect(context).not.toMatch(/iets-anders/);
+  });
+});

src/components/chat/chat.css

@@ -87,8 +87,13 @@
   border-radius: 999px;
   background: var(--sage);
 }
-.r42-window-hd-x {
+.r42-window-hd-actions {
   margin-left: auto;
+  display: flex;
+  align-items: center;
+  gap: 2px;
+}
+.r42-window-hd-x {
   color: rgba(236, 233, 233, 0.7);
   background: transparent;
   border: none;
@@ -99,6 +104,18 @@
   border-radius: var(--r-sm);
 }
 .r42-window-hd-x:hover { background: rgba(236, 233, 233, 0.1); }
+.r42-window-hd-clear {
+  color: rgba(236, 233, 233, 0.7);
+  background: transparent;
+  border: none;
+  cursor: pointer;
+  padding: 6px;
+  border-radius: var(--r-sm);
+  display: grid;
+  place-items: center;
+}
+.r42-window-hd-clear:hover { background: rgba(236, 233, 233, 0.1); }
+.r42-window-hd-clear:disabled { opacity: 0.4; cursor: default; }
 
 .r42-window-body {
   flex: 1;

src/components/chat/prompts.js

@@ -21,6 +21,8 @@ export const STRINGS = {
   suggestionDismissed: 'Oké, niets gedaan.',
   closeAria: 'Sluit chatvenster',
   openAria: 'Open R42 chatbot',
+  clearAria: 'Wis gesprek',
+  clearConfirm: 'Dit gesprek wissen? Dit kan niet ongedaan worden gemaakt.',
 };
 
 const STABLE_PREAMBLE = [
@@ -35,11 +37,16 @@ const STABLE_PREAMBLE = [
   `JE KENNIS:`,
   `Je kennis is beperkt tot de Respellion-kennisgraaf die hieronder volgt. Als een vraag duidelijk buiten dit bereik valt, zeg dat dan eerlijk en stel voor dat de gebruiker de bron toevoegt via Admin → Sources.`,
   ``,
+  `NAUWKEURIGHEID (belangrijk):`,
+  `- Baseer je antwoord uitsluitend op de KENNISGRAAF en DIEPERE INHOUD hieronder; verzin niets.`,
+  `- Gebruik ALLE relevante feiten die daar staan. Bij een vraag om details, bedragen, percentages, voorwaarden of een opsomming: noem elk relevant feit — vat niet samen ten koste van volledigheid.`,
+  `- Als de samenvattende KENNISGRAAF te dun is om de vraag volledig te beantwoorden, roep dan éérst de tool "lookup_topic" aan (met het exacte topic-id) voordat je concludeert dat je het niet weet.`,
+  ``,
   `KENNISGRAAF VERFIJNEN:`,
   `Wanneer de gebruiker iets noemt dat duidelijk een nieuw topic, nieuwe relatie, proces of rol is — en dat nog niet in de kennisgraaf staat — gebruik dan de tool "propose_graph_delta" om een voorstel te maken. Verzin niets: stel alleen iets voor als de gebruiker het concreet noemt. Stel maximaal 3 topics en 5 relaties per beurt voor.`,
   ``,
   `STIJL:`,
-  `- Houd antwoorden onder de 4 zinnen tenzij de gebruiker om uitleg vraagt.`,
+  `- Zo kort als kan, zo volledig als nodig: houd eenvoudige antwoorden onder de 4 zinnen, maar som bij details- of opsommingsvragen álle relevante feiten op (desnoods als korte lijst met streepjes).`,
   `- Geen markdown-headers; gewone Nederlandse tekst.`,
   `- Bij onzekerheid: "Ik weet het niet zeker — controleer dit in het handboek."`,
 ].join('\n');

src/components/chat/rag.js

@@ -2,6 +2,13 @@ import * as db from '../../lib/db';
 import { buildIndex, retrieveTopK } from '../../lib/retrieval';
 
 const TOP_K = 10;
+// How many topics get their full article body injected (not just the short
+// description). Verbatim-mentioned topics come first, then the highest-ranked
+// retrieved ones, so a query that never names a topic exactly still gets rich
+// content for what it matched.
+const DEEP_CONTENT_LIMIT = 5;
+const DEEP_SNIPPET_CHARS = 1000;
+const DESC_SNIPPET_CHARS = 320;
 
 async function sha256Hex(input) {
   const enc = new TextEncoder().encode(input);
@@ -71,7 +78,7 @@ export async function buildKbContext(userMessage = '') {
   const included = [...includedById.values()];
 
   const topicLines = included.map(t => {
-    const desc = (t.description || '').replace(/\s+/g, ' ').trim().slice(0, 200);
+    const desc = (t.description || '').replace(/\s+/g, ' ').trim().slice(0, DESC_SNIPPET_CHARS);
     return `- ${t.id} (${t.type || 'concept'}) "${t.label}": ${desc}`;
   });
 
@@ -85,19 +92,30 @@ export async function buildKbContext(userMessage = '') {
     }
   }
 
-  const mentionedDeepContent = [];
-  for (const id of mentionedIds) {
-    const t = includedById.get(id);
-    if (!t) continue;
-    const content = await db.getContent(t.id).catch(() => null);
-    if (!content) continue;
-    let raw;
-    if (typeof content === 'string') raw = content;
-    else if (content.article) raw = typeof content.article === 'string' ? content.article : JSON.stringify(content.article);
-    else raw = JSON.stringify(content);
-    const snippet = raw.replace(/\s+/g, ' ').trim().slice(0, 1200);
-    mentionedDeepContent.push(`### ${t.label}\n${snippet}`);
+  // Pick which topics get their full article body: verbatim mentions first,
+  // then the highest-ranked retrieved topics, capped at DEEP_CONTENT_LIMIT.
+  const deepIds = [];
+  for (const id of mentionedIds) deepIds.push(id);
+  for (const t of retrieved) {
+    if (deepIds.length >= DEEP_CONTENT_LIMIT) break;
+    if (!mentionedIds.has(t.id)) deepIds.push(t.id);
   }
+  const deepBlocks = await Promise.all(
+    deepIds.slice(0, DEEP_CONTENT_LIMIT).map(async (id) => {
+      const t = includedById.get(id);
+      if (!t) return null;
+      const content = await db.getContent(id).catch(() => null);
+      if (!content) return null;
+      let raw;
+      if (typeof content === 'string') raw = content;
+      else if (content.article) raw = typeof content.article === 'string' ? content.article : JSON.stringify(content.article);
+      else raw = JSON.stringify(content);
+      const snippet = raw.replace(/\s+/g, ' ').trim().slice(0, DEEP_SNIPPET_CHARS);
+      if (!snippet) return null;
+      return `### ${t.label}\n${snippet}`;
+    }),
+  );
+  const mentionedDeepContent = deepBlocks.filter(Boolean);
 
   const context = [
     `KENNISGRAAF — RELEVANTE TOPICS (top ${included.length} van ${allTopics.length}):`,
@@ -106,7 +124,7 @@ export async function buildKbContext(userMessage = '') {
     `KENNISGRAAF — RELATIES (binnen deze selectie):`,
     relLines.length ? relLines.join('\n') : '(geen relaties binnen deze selectie)',
     mentionedDeepContent.length
-      ? `\n\nDIEPERE INHOUD (voor genoemde topics):\n${mentionedDeepContent.join('\n\n')}`
+      ? `\n\nDIEPERE INHOUD (volledige leerinhoud van de meest relevante topics — gebruik álle feiten hieruit die de vraag beantwoorden):\n${mentionedDeepContent.join('\n\n')}`
       : '',
     ``,
     `Als de relevante context hierboven te beperkt is, gebruik dan de tool "lookup_topic" om de volledige beschrijving en eventuele leerinhoud van een specifiek topic op te halen.`,

src/components/chat/useChat.js

@@ -92,6 +92,19 @@ export function useChat({ user, isAdmin }) {
     setMessages(prev => prev.map(m => (m.id === id ? { ...m, ...patch } : m)));
   }, []);
 
+  /** Wipe the persisted thread and reset to a fresh greeting. */
+  const clearThread = useCallback(() => {
+    seenDeltaKeys.current = new Set();
+    const greeting = {
+      id: `m_${Date.now()}`,
+      role: 'assistant',
+      content: STRINGS.greeting(user?.name || 'daar'),
+      ts: Date.now(),
+    };
+    setMessages([greeting]);
+    if (threadKey) storage.set(threadKey, [greeting]);
+  }, [user, threadKey]);
+
   const send = useCallback(async (text) => {
     const trimmed = (text || '').trim();
     if (!trimmed || !user) return;
@@ -225,5 +238,6 @@ export function useChat({ user, isAdmin }) {
     errored,
     send,
     updateMessage,
+    clearThread,
   };
 }

src/lib/__tests__/llmSchemas.test.js

@@ -9,6 +9,7 @@ import {
   customTopicSchema,
   graphActionsSchema,
   proposeGraphDeltaSchema,
+  onboardingOverviewSchema,
 } from '../llmSchemas';
 
 const sampleTopic = {
@@ -192,3 +193,56 @@ describe('proposeGraphDeltaSchema', () => {
     ).toThrow();
   });
 });
+
+describe('onboardingOverviewSchema (issue #32 — fast-tier stringified arrays)', () => {
+  const base = {
+    title: 'Privacy',
+    what_it_is: 'How we handle data.',
+    why_it_matters: 'You touch personal data weekly.',
+  };
+  const points = ['Point one', 'Point two', 'Point three'];
+  const topics = [{ topic_id: 'avg', label: 'AVG' }];
+
+  it('accepts well-formed output', () => {
+    const r = onboardingOverviewSchema.parse({ ...base, key_points: points, topics_covered: topics });
+    expect(r.key_points).toEqual(points);
+    expect(r.topics_covered).toEqual(topics);
+  });
+
+  it('coerces JSON-stringified arrays back to arrays (the exact #32 failure)', () => {
+    const r = onboardingOverviewSchema.parse({
+      ...base,
+      key_points: JSON.stringify(points),
+      topics_covered: JSON.stringify(topics),
+    });
+    expect(r.key_points).toEqual(points);
+    expect(r.topics_covered).toEqual(topics);
+  });
+
+  it('splits a bullet/newline string of key points as a fallback', () => {
+    const r = onboardingOverviewSchema.parse({
+      ...base,
+      key_points: '- Point one\n• Point two\n3. Point three',
+      topics_covered: topics,
+    });
+    expect(r.key_points).toEqual(points);
+  });
+
+  it('keeps the first 5 key points instead of failing on overage', () => {
+    const seven = Array.from({ length: 7 }, (_, i) => `P${i + 1}`);
+    const r = onboardingOverviewSchema.parse({ ...base, key_points: seven, topics_covered: topics });
+    expect(r.key_points).toEqual(['P1', 'P2', 'P3', 'P4', 'P5']);
+  });
+
+  it('still rejects genuinely bad output', () => {
+    expect(() =>
+      onboardingOverviewSchema.parse({ ...base, key_points: ['only', 'two'], topics_covered: topics }),
+    ).toThrow();
+    expect(() =>
+      onboardingOverviewSchema.parse({ ...base, key_points: points, topics_covered: 'not json at all' }),
+    ).toThrow();
+    expect(() =>
+      onboardingOverviewSchema.parse({ ...base, key_points: 42, topics_covered: topics }),
+    ).toThrow();
+  });
+});

src/lib/__tests__/onboardingService.test.js

@@ -0,0 +1,152 @@
+import { describe, expect, it } from 'vitest';
+import {
+  ONBOARDING_DAY_COUNT,
+  orderThemes,
+  distributeThemesIntoDays,
+  computeTopicsFingerprint,
+  computeOnboardingProgress,
+  buildOnboardingPlan,
+} from '../onboardingService';
+
+const sizes = (days) => days.map((d) => d.themes.length);
+
+describe('onboardingService pure helpers', () => {
+  it('exposes a 5-day guideline', () => {
+    expect(ONBOARDING_DAY_COUNT).toBe(5);
+  });
+
+  describe('orderThemes', () => {
+    const kb = ['Governance', 'Culture', 'Privacy', 'Process'];
+
+    it('orders by first appearance in the schedule, then appends the rest alphabetically', () => {
+      const schedule = [{ theme: 'Privacy' }, { theme: 'Governance' }];
+      expect(orderThemes(kb, schedule)).toEqual(['Privacy', 'Governance', 'Culture', 'Process']);
+    });
+
+    it('de-duplicates repeated schedule labels', () => {
+      const schedule = [{ theme: 'Privacy' }, { theme: 'Privacy' }, { theme: 'Culture' }];
+      expect(orderThemes(kb, schedule)).toEqual(['Privacy', 'Culture', 'Governance', 'Process']);
+    });
+
+    it('ignores schedule labels that are not real KB themes (e.g. merged-week labels)', () => {
+      const schedule = [{ theme: 'Privacy & Governance (merged)' }, { theme: 'Culture' }];
+      expect(orderThemes(kb, schedule)).toEqual(['Culture', 'Governance', 'Privacy', 'Process']);
+    });
+
+    it('falls back to pure alphabetical when the schedule is null/empty', () => {
+      expect(orderThemes(kb, null)).toEqual(['Culture', 'Governance', 'Privacy', 'Process']);
+      expect(orderThemes(kb, [])).toEqual(['Culture', 'Governance', 'Privacy', 'Process']);
+    });
+  });
+
+  describe('distributeThemesIntoDays', () => {
+    const themes = (n) => Array.from({ length: n }, (_, i) => `T${i + 1}`);
+
+    it('splits 10 themes evenly across 5 days', () => {
+      expect(sizes(distributeThemesIntoDays(themes(10)))).toEqual([2, 2, 2, 2, 2]);
+    });
+
+    it('front-loads the remainder (12 -> 3,3,2,2,2)', () => {
+      expect(sizes(distributeThemesIntoDays(themes(12)))).toEqual([3, 3, 2, 2, 2]);
+    });
+
+    it('handles 7 -> 2,2,1,1,1', () => {
+      expect(sizes(distributeThemesIntoDays(themes(7)))).toEqual([2, 2, 1, 1, 1]);
+    });
+
+    it('uses fewer days than the cap when there are fewer themes', () => {
+      const days = distributeThemesIntoDays(themes(3));
+      expect(sizes(days)).toEqual([1, 1, 1]);
+      expect(days.map((d) => d.day)).toEqual([1, 2, 3]);
+    });
+
+    it('returns [] for no themes', () => {
+      expect(distributeThemesIntoDays([])).toEqual([]);
+    });
+
+    it('preserves order and loses nothing', () => {
+      const input = themes(12);
+      const flat = distributeThemesIntoDays(input).flatMap((d) => d.themes);
+      expect(flat).toEqual(input);
+    });
+  });
+
+  describe('computeTopicsFingerprint', () => {
+    it('is order-independent', () => {
+      const a = computeTopicsFingerprint([{ id: 'x' }, { id: 'y' }, { id: 'z' }]);
+      const b = computeTopicsFingerprint([{ id: 'z' }, { id: 'x' }, { id: 'y' }]);
+      expect(a).toBe(b);
+    });
+
+    it('changes when a topic is added or removed', () => {
+      const base = computeTopicsFingerprint([{ id: 'x' }, { id: 'y' }]);
+      expect(computeTopicsFingerprint([{ id: 'x' }])).not.toBe(base);
+      expect(computeTopicsFingerprint([{ id: 'x' }, { id: 'y' }, { id: 'z' }])).not.toBe(base);
+    });
+
+    it('handles empty input', () => {
+      expect(typeof computeTopicsFingerprint([])).toBe('string');
+    });
+  });
+
+  describe('computeOnboardingProgress', () => {
+    const days = [
+      { day: 1, themes: ['A', 'B'] },
+      { day: 2, themes: ['C'] },
+    ];
+
+    it('does not count a partially-done day as complete', () => {
+      const p = computeOnboardingProgress(days, new Set(['A']));
+      expect(p).toMatchObject({ themesTotal: 3, themesDone: 1, dayCount: 2, daysCompleted: 0, allDone: false });
+      expect(p.percentage).toBe(33);
+    });
+
+    it('counts a fully-done day', () => {
+      const p = computeOnboardingProgress(days, new Set(['A', 'B']));
+      expect(p).toMatchObject({ themesDone: 2, daysCompleted: 1, allDone: false });
+    });
+
+    it('reports allDone only when every theme is complete', () => {
+      const p = computeOnboardingProgress(days, new Set(['A', 'B', 'C']));
+      expect(p).toMatchObject({ themesDone: 3, daysCompleted: 2, percentage: 100, allDone: true });
+    });
+
+    it('accepts an array as well as a Set', () => {
+      expect(computeOnboardingProgress(days, ['A', 'B', 'C']).allDone).toBe(true);
+    });
+
+    it('returns zeros for an empty plan', () => {
+      expect(computeOnboardingProgress([], new Set())).toEqual({
+        themesTotal: 0, themesDone: 0, dayCount: 0, daysCompleted: 0, percentage: 0, allDone: false,
+      });
+    });
+  });
+
+  describe('buildOnboardingPlan', () => {
+    const topics = [
+      { id: 't1', label: 'T1', theme: 'Privacy', complexity_weight: 2 },
+      { id: 't2', label: 'T2', theme: 'Culture', complexity_weight: 1 },
+      { id: 'f1', label: 'F1', theme: 'Privacy', type: 'fact' }, // excluded by buildThemeTopicMap
+    ];
+
+    it('builds themes (schedule-ordered), days, and a theme→topics map', () => {
+      const activeVersion = { schedule: [{ theme: 'Privacy' }, { theme: 'Culture' }] };
+      const plan = buildOnboardingPlan(topics, activeVersion);
+      expect(plan.themes).toEqual(['Privacy', 'Culture']);
+      expect(sizes(plan.days)).toEqual([1, 1]);
+      expect(plan.themeTopicMap.get('Privacy').map((t) => t.id)).toEqual(['t1']); // fact excluded
+    });
+
+    it('tolerates a stringified schedule and a missing version', () => {
+      const stringified = { schedule: JSON.stringify([{ theme: 'Culture' }]) };
+      expect(buildOnboardingPlan(topics, stringified).themes).toEqual(['Culture', 'Privacy']);
+      expect(buildOnboardingPlan(topics, null).themes).toEqual(['Culture', 'Privacy']);
+    });
+
+    it('returns an empty plan for an empty KB', () => {
+      const plan = buildOnboardingPlan([], null);
+      expect(plan.themes).toEqual([]);
+      expect(plan.days).toEqual([]);
+    });
+  });
+});

src/lib/__tests__/retrieval.test.js

@@ -50,6 +50,31 @@ describe('buildIndex / retrieveTopK', () => {
     expect(retrieveTopK(idx, 'kwantumfysica raketten')).toEqual([]);
   });
 
+  it('matches Dutch compound words on a shared stem', () => {
+    const pensionTopics = [
+      { id: 'pensioenregeling', label: 'Pensioenregeling', description: 'De beschikbare premieregeling bij a.s.r. Doen Pensioen.' },
+      { id: 'partnerpensioen', label: 'Partnerpensioen', description: 'Uitkering aan de partner bij overlijden.' },
+      { id: 'reiskostenvergoeding', label: 'Reiskostenvergoeding', description: 'EUR 0,23 per kilometer voor woon-werkverkeer.' },
+    ];
+    const idx = buildIndex(pensionTopics);
+    // "pensioen" never appears as a standalone token in a label, yet the stem is
+    // a prefix of "pensioenregeling" and an infix of "partnerpensioen".
+    const hits = retrieveTopK(idx, 'wat dekt mijn pensioen?', 3).map(h => h.id);
+    expect(hits).toContain('pensioenregeling');
+    expect(hits).toContain('partnerpensioen');
+    expect(hits).not.toContain('reiskostenvergoeding');
+  });
+
+  it('does not partial-match on short shared prefixes', () => {
+    const topics = [
+      { id: 'onderhoud', label: 'Onderhoud', description: 'Technisch beheer van systemen.' },
+    ];
+    const idx = buildIndex(topics);
+    // "onderneming" shares only "onder" (5) with "onderhoud" — below the overlap
+    // needed for a query token this size to count.
+    expect(retrieveTopK(idx, 'onderneming')).toEqual([]);
+  });
+
   it('caches the index per topics array reference', () => {
     const idx1 = buildIndex(sampleTopics);
     const idx2 = buildIndex(sampleTopics);

src/lib/db.js

@@ -406,6 +406,49 @@ export async function setThemeSessionCompletion(userId, themeSessionId, sessionW
   );
 }
 
+// ── Onboarding track ─────────────────────────────────────────────────────────
+
+/**
+ * Cached onboarding overview for a theme, or null. `theme` is free text →
+ * use pb.filter() bindings so quotes/specials can't break the filter.
+ */
+export async function getOnboardingOverview(theme) {
+  try {
+    return await pb.collection('onboarding_overviews').getFirstListItem(
+      pb.filter('theme = {:theme}', { theme }),
+    );
+  } catch {
+    return null;
+  }
+}
+
+/** Upsert the cached overview for a theme (keyed by theme). */
+export async function setOnboardingOverview(theme, content, fingerprint) {
+  return pbUpsert(
+    'onboarding_overviews',
+    pb.filter('theme = {:theme}', { theme }),
+    { content, topics_fingerprint: fingerprint },
+    { theme, content, topics_fingerprint: fingerprint },
+  );
+}
+
+/** All onboarding-completion rows for a user (each has a `theme`). */
+export async function getCompletedOnboardingThemes(userId) {
+  return pb.collection('onboarding_completions').getFullList({
+    filter: pb.filter('team_member_id = {:userId}', { userId }),
+  });
+}
+
+/** Mark a theme complete for the user. Idempotent (unique on user+theme). */
+export async function setOnboardingCompletion(userId, theme) {
+  return pbUpsert(
+    'onboarding_completions',
+    pb.filter('team_member_id = {:userId} && theme = {:theme}', { userId, theme }),
+    { team_member_id: userId, theme },
+    { team_member_id: userId, theme },
+  );
+}
+
 // ── Leaderboard ───────────────────────────────────────────────────────────────
 
 export async function getLeaderboard() {

src/lib/llm.js

@@ -213,6 +213,13 @@ const SIMULATION_TOOL_STUBS = {
   },
   emit_graph_actions: { merges: [], deletions: [], newRelations: [], relevanceUpdates: [] },
   set_intro: { intro: 'Bijgewerkte intro (simulatie).' },
+  emit_onboarding_overview: {
+    title: 'Voorbeeldthema',
+    what_it_is: 'Een korte simulatie-omschrijving van dit thema.',
+    why_it_matters: 'In simulatiemodus laat dit zien hoe de onboarding-overview eruitziet zonder de API te raken.',
+    key_points: ['Kernpunt één', 'Kernpunt twee', 'Kernpunt drie'],
+    topics_covered: [{ topic_id: 'sim-topic', label: 'Simulatie onderwerp' }],
+  },
 };
 
 function stubResponse({ stopReason = 'end_turn', text = '', toolUses = [] }) {

src/lib/llmSchemas.js

@@ -229,6 +229,45 @@ export const themeSessionSchema = z.object({
   keyTakeaways: z.array(z.string().min(1)).min(3),
 });
 
+// Fast-tier models occasionally emit array tool fields as a JSON-encoded
+// string ("[\"a\",\"b\"]") instead of a real array (issue #32). Parse those
+// back to arrays before validating; leave anything else untouched so real
+// type errors still fail validation.
+function coerceStringifiedArray(v) {
+  if (typeof v === 'string') {
+    const s = v.trim();
+    if (s.startsWith('[')) {
+      try { return JSON.parse(s); } catch { /* keep original, let Zod report */ }
+    }
+  }
+  return v;
+}
+
+const onboardingKeyPoints = z.preprocess((v) => {
+  let out = coerceStringifiedArray(v);
+  // Fallback: a bullet/newline list as one string → split into points.
+  if (typeof out === 'string' && out.includes('\n')) {
+    out = out
+      .split('\n')
+      .map((line) => line.replace(/^\s*[-•*\d.]+\s*/, '').trim())
+      .filter(Boolean);
+  }
+  // Overage is trivial — keep the first 5 rather than failing the user.
+  if (Array.isArray(out) && out.length > 5) out = out.slice(0, 5);
+  return out;
+}, z.array(z.string().min(1)).min(3).max(5));
+
+export const onboardingOverviewSchema = z.object({
+  title: z.string().min(1),
+  what_it_is: z.string().min(1),
+  why_it_matters: z.string().min(1),
+  key_points: onboardingKeyPoints,
+  topics_covered: z.preprocess(
+    coerceStringifiedArray,
+    z.array(z.object({ topic_id: z.string().min(1), label: z.string().min(1) })).min(1),
+  ),
+});
+
 /**
  * Registry mapping known tool names to their input schemas. `callLLM`
  * consults this when the caller does not pass an explicit `toolSchemas`
@@ -252,4 +291,5 @@ export const toolSchemaRegistry = {
   remove_section: removeSectionPatchSchema,
   replace_takeaways: replaceTakeawaysPatchSchema,
   emit_theme_session: themeSessionSchema,
+  emit_onboarding_overview: onboardingOverviewSchema,
 };

src/lib/llmTools.js

@@ -454,3 +454,39 @@ export const EMIT_THEME_SESSION_TOOL = {
   },
 };
 
+// ── Onboarding overview (breadth-first, one theme) ───────────────────────────
+
+export const EMIT_ONBOARDING_OVERVIEW_TOOL = {
+  name: 'emit_onboarding_overview',
+  description: 'Return a SHORT, breadth-first onboarding overview of ONE theme for a brand-new Respellion employee. This is a light introduction, NOT a deep lesson: what the theme is in plain language, why it matters for day-to-day and week-to-week work at Respellion, a few key points, and which topics belong to it. Keep it skimmable.',
+  input_schema: {
+    type: 'object',
+    properties: {
+      title: { type: 'string', description: 'Learner-facing theme title, 2–6 words.' },
+      what_it_is: { type: 'string', description: '1–2 plain-language sentences defining what this theme is about.' },
+      why_it_matters: { type: 'string', description: '1–3 sentences on why this theme matters for a new employee\'s daily and weekly work at Respellion.' },
+      key_points: {
+        type: 'array',
+        items: { type: 'string' },
+        minItems: 3,
+        maxItems: 5,
+        description: '3–5 short, concrete takeaways a newcomer should remember about this theme. Must be a JSON array of strings — never a single string.',
+      },
+      topics_covered: {
+        type: 'array',
+        description: 'The topics that make up this theme. Reuse the exact topic_id you were given so the UI can link back. Must be a JSON array of objects — never a string.',
+        items: {
+          type: 'object',
+          properties: {
+            topic_id: { type: 'string', description: 'The id of the topic (must match one of the ids provided).' },
+            label: { type: 'string', description: 'The topic label, as provided.' },
+          },
+          required: ['topic_id', 'label'],
+        },
+        minItems: 1,
+      },
+    },
+    required: ['title', 'what_it_is', 'why_it_matters', 'key_points', 'topics_covered'],
+  },
+};
+

src/lib/onboardingService.js

@@ -0,0 +1,233 @@
+import * as db from './db';
+import { callLLM, cachedSystem } from './llm';
+import { buildThemeTopicMap } from './curriculumService';
+import { EMIT_ONBOARDING_OVERVIEW_TOOL } from './llmTools';
+
+// The onboarding track introduces a new employee to every KB theme in breadth,
+// spread over a guideline of 5 "days". A theme is the unit we track completion
+// on; "days" are only a presentation grouping computed at read time, so
+// re-chunking (e.g. when the theme set changes) never loses a user's progress.
+export const ONBOARDING_DAY_COUNT = 5;
+
+// ── Pure helpers (unit-tested) ───────────────────────────────────────────────
+
+/**
+ * Order theme names by their first appearance in the active curriculum schedule
+ * (a pedagogical order), then append any KB themes the schedule never names,
+ * alphabetically. Schedule labels that aren't real KB themes (e.g. merged-week
+ * labels) are ignored. De-duplicated.
+ *
+ * @param {string[]} themeNames — canonical theme names present in the KB
+ * @param {Array<{theme?: string}>|null} schedule — active curriculum schedule
+ * @returns {string[]}
+ */
+export function orderThemes(themeNames, schedule) {
+  const known = new Set(themeNames);
+  const ordered = [];
+  const seen = new Set();
+
+  if (Array.isArray(schedule)) {
+    for (const week of schedule) {
+      const theme = week && week.theme;
+      if (theme && known.has(theme) && !seen.has(theme)) {
+        seen.add(theme);
+        ordered.push(theme);
+      }
+    }
+  }
+
+  const remaining = themeNames
+    .filter((t) => !seen.has(t))
+    .sort((a, b) => a.localeCompare(b));
+
+  return [...ordered, ...remaining];
+}
+
+/**
+ * Split an ordered theme list into balanced, order-preserving day buckets.
+ * Uses at most `dayCount` days; with fewer themes than days it uses `N` days.
+ * The first `remainder` days get one extra theme.
+ *
+ * @param {string[]} orderedThemes
+ * @param {number} [dayCount=5]
+ * @returns {Array<{ day: number, themes: string[] }>} non-empty days only
+ */
+export function distributeThemesIntoDays(orderedThemes, dayCount = ONBOARDING_DAY_COUNT) {
+  const themes = Array.isArray(orderedThemes) ? orderedThemes : [];
+  const n = themes.length;
+  if (n === 0) return [];
+
+  const effectiveDays = Math.min(dayCount, n);
+  const base = Math.floor(n / effectiveDays);
+  const remainder = n % effectiveDays;
+
+  const days = [];
+  let idx = 0;
+  for (let d = 0; d < effectiveDays; d++) {
+    const size = base + (d < remainder ? 1 : 0);
+    days.push({ day: d + 1, themes: themes.slice(idx, idx + size) });
+    idx += size;
+  }
+  return days;
+}
+
+/**
+ * Stable, order-independent fingerprint over a theme's topic ids. Changes when
+ * a topic is added to or removed from the theme, so cached overviews can be
+ * detected as stale and regenerated.
+ *
+ * @param {Array<{id?: string}>} topics
+ * @returns {string}
+ */
+export function computeTopicsFingerprint(topics) {
+  const ids = (Array.isArray(topics) ? topics : [])
+    .map((t) => t && t.id)
+    .filter(Boolean)
+    .sort();
+  const joined = ids.join(',');
+  let h = 5381;
+  for (let i = 0; i < joined.length; i++) {
+    h = ((h << 5) + h + joined.charCodeAt(i)) >>> 0; // djb2, unsigned
+  }
+  return `${ids.length}:${h.toString(16)}`;
+}
+
+/**
+ * Derive progress from the plan's days and the set of completed themes.
+ *
+ * @param {Array<{ day: number, themes: string[] }>} days
+ * @param {Set<string>|string[]} completedThemeSet
+ * @returns {{ themesTotal:number, themesDone:number, dayCount:number, daysCompleted:number, percentage:number, allDone:boolean }}
+ */
+export function computeOnboardingProgress(days, completedThemeSet) {
+  const set = completedThemeSet instanceof Set
+    ? completedThemeSet
+    : new Set(completedThemeSet || []);
+  const allThemes = (days || []).flatMap((d) => d.themes);
+  const themesTotal = allThemes.length;
+  const themesDone = allThemes.filter((t) => set.has(t)).length;
+  const dayCount = (days || []).length;
+  const daysCompleted = (days || []).filter(
+    (d) => d.themes.length > 0 && d.themes.every((t) => set.has(t)),
+  ).length;
+  const percentage = themesTotal === 0 ? 0 : Math.round((themesDone / themesTotal) * 100);
+  const allDone = themesTotal > 0 && themesDone === themesTotal;
+  return { themesTotal, themesDone, dayCount, daysCompleted, percentage, allDone };
+}
+
+/**
+ * Build the onboarding plan from already-loaded topics + active curriculum version.
+ *
+ * @param {Array} topics — all topics (db.getTopics())
+ * @param {object|null} activeVersion — active curriculum_versions row (for schedule order)
+ * @returns {{ themes: string[], days: Array<{day:number,themes:string[]}>, themeTopicMap: Map<string, Array> }}
+ */
+export function buildOnboardingPlan(topics, activeVersion) {
+  const themeTopicMap = buildThemeTopicMap(topics || []);
+
+  let schedule = activeVersion && activeVersion.schedule ? activeVersion.schedule : null;
+  if (typeof schedule === 'string') {
+    try { schedule = JSON.parse(schedule); } catch { schedule = null; }
+  }
+
+  const themes = orderThemes([...themeTopicMap.keys()], schedule);
+  const days = distributeThemesIntoDays(themes);
+  return { themes, days, themeTopicMap };
+}
+
+// ── I/O + generation ─────────────────────────────────────────────────────────
+
+const ONBOARDING_OVERVIEW_SYSTEM = `You are an onboarding guide for Respellion, an internal IT company.
+You introduce a brand-new employee to ONE theme from the company knowledge base.
+This is a breadth-first introduction, not a deep lesson: keep it short, plain and skimmable, and always connect the theme to how work actually happens day-to-day and week-to-week at Respellion.
+Write in clear, professional English. Emit content only through the emit_onboarding_overview tool.`;
+
+function buildOverviewPrompt(theme, topics) {
+  const topicLines = topics
+    .map((t, idx) => `${idx + 1}. id=${t.id} | label="${t.label}" | type=${t.type || '—'} | description=${t.description || '—'}`)
+    .join('\n');
+
+  return `Theme: ${theme}
+
+Topics that make up this theme (reuse the exact topic_id for each entry in topics_covered):
+${topicLines || '(no topics listed)'}
+
+Write a short, breadth-first onboarding overview of this theme for a new employee's first week: what it is, why it matters for their daily and weekly work at Respellion, 3–5 key points, and the list of topics it covers.`;
+}
+
+/**
+ * Load everything needed to render the track.
+ * @returns {Promise<{themes:string[], days:Array, themeTopicMap:Map}>}
+ */
+export async function getOnboardingPlan() {
+  const [topics, activeVersion] = await Promise.all([
+    db.getTopics(),
+    db.getActiveCurriculumVersion(),
+  ]);
+  return buildOnboardingPlan(topics, activeVersion);
+}
+
+/**
+ * Get the cached onboarding overview for a theme, or generate + cache it.
+ * Regenerates when the theme's topic set has changed (fingerprint mismatch).
+ *
+ * @param {string} theme
+ * @param {Array} topicsForTheme — topics belonging to the theme
+ * @param {object} [opts]
+ * @param {boolean} [opts.force=false]
+ */
+export async function getOrGenerateOnboardingOverview(theme, topicsForTheme, { force = false } = {}) {
+  if (!theme) throw new Error('Onboarding overview requires a theme.');
+  const topics = Array.isArray(topicsForTheme) ? topicsForTheme : [];
+  const fingerprint = computeTopicsFingerprint(topics);
+
+  if (!force) {
+    const cached = await db.getOnboardingOverview(theme);
+    if (cached && cached.topics_fingerprint === fingerprint) return cached;
+  }
+
+  const result = await callLLM({
+    task: 'onboarding.overview',
+    tier: 'fast',
+    system: cachedSystem(ONBOARDING_OVERVIEW_SYSTEM),
+    user: buildOverviewPrompt(theme, topics),
+    tools: [EMIT_ONBOARDING_OVERVIEW_TOOL],
+    toolChoice: { type: 'tool', name: EMIT_ONBOARDING_OVERVIEW_TOOL.name },
+    maxTokens: 1500,
+    timeoutMs: 60_000,
+  });
+
+  const emitted = result.toolUses[0]?.input;
+  if (!emitted) throw new Error('AI did not return an onboarding overview. Please try again.');
+
+  return db.setOnboardingOverview(theme, emitted, fingerprint);
+}
+
+/**
+ * Set of theme names the user has marked complete.
+ * @param {string} userId
+ * @returns {Promise<Set<string>>}
+ */
+export async function getCompletedThemes(userId) {
+  const rows = await db.getCompletedOnboardingThemes(userId);
+  return new Set(rows.map((r) => r.theme));
+}
+
+/**
+ * Mark a theme complete for the user. Idempotent.
+ */
+export async function markThemeCompleted(userId, theme) {
+  return db.setOnboardingCompletion(userId, theme);
+}
+
+/**
+ * Progress summary for the Dashboard chip.
+ * @param {string} userId
+ */
+export async function getOnboardingSummary(userId) {
+  const [plan, completed] = await Promise.all([
+    getOnboardingPlan(),
+    getCompletedThemes(userId),
+  ]);
+  return computeOnboardingProgress(plan.days, completed);
+}

src/lib/retrieval.js

@@ -63,6 +63,29 @@ export function buildIndex(topics) {
   return index;
 }
 
+// Compound-word matching. Dutch is heavily compounding, so a user's word
+// (`pensioenafspraken`) is a *different* token than the graph's labels
+// (`pensioenregeling`, `partnerpensioen`), even though they share the stem
+// `pensioen`. Exact TF-IDF scores those pairs at 0, so the relevant topics are
+// never retrieved. These heuristics recover that recall at a reduced weight,
+// so exact matches still dominate the ranking.
+const PARTIAL_MIN_QUERY_LEN = 6; // only expand meaty query tokens
+const PARTIAL_MIN_OVERLAP = 6;   // shared stem / substring must be this long
+const PARTIAL_WEIGHT = 0.4;      // discount vs. an exact term hit
+
+/** True when two distinct tokens share a long stem or one contains the other. */
+function partialMatch(q, d) {
+  if (q === d) return false;
+  const shorter = q.length <= d.length ? q : d;
+  const longer = q.length <= d.length ? d : q;
+  if (shorter.length < PARTIAL_MIN_OVERLAP) return false;
+  if (longer.includes(shorter)) return true;
+  let n = 0;
+  const m = shorter.length;
+  while (n < m && q[n] === d[n]) n++;
+  return n >= PARTIAL_MIN_OVERLAP;
+}
+
 export function retrieveTopK(index, query, k = 10) {
   if (!index || !index.N || !query) return [];
   const qTokens = tokenize(query);
@@ -80,8 +103,19 @@ export function retrieveTopK(index, query, k = 10) {
     let s = 0;
     for (const t of qTokens) {
       const f = tf.get(t);
-      if (!f) continue;
-      s += (1 + Math.log(f)) * idf(t);
+      if (f) {
+        s += (1 + Math.log(f)) * idf(t);
+        continue;
+      }
+      // No exact hit — try a compound-word match against this doc's terms.
+      if (t.length < PARTIAL_MIN_QUERY_LEN) continue;
+      let best = 0;
+      for (const [term, tf2] of tf) {
+        if (!partialMatch(t, term)) continue;
+        const w = PARTIAL_WEIGHT * (1 + Math.log(tf2)) * idf(term);
+        if (w > best) best = w;
+      }
+      s += best;
     }
     scores[i] = s;
   }

src/pages/Dashboard.jsx

@@ -1,6 +1,6 @@
 import { useState, useEffect } from 'react';
 import { Link } from 'react-router-dom';
-import { BookOpen, CheckSquare, Trophy, Sparkles, X, HelpCircle } from 'lucide-react';
+import { BookOpen, CheckSquare, Trophy, Sparkles, X, HelpCircle, Rocket, ArrowRight } from 'lucide-react';
 import { useApp } from '../store/AppContext';
 import Card from '../components/ui/Card';
 import Button from '../components/ui/Button';
@@ -9,6 +9,7 @@ import * as db from '../lib/db';
 import { storage } from '../lib/storage';
 import { getAssignedTopic } from '../lib/learningService';
 import { getYearProgress, getCurriculumCycle, getCurriculumWeek, getActiveVersion } from '../lib/curriculumService';
+import { getOnboardingSummary } from '../lib/onboardingService';
 
 const Dashboard = () => {
   const { state } = useApp();
@@ -25,6 +26,7 @@ const Dashboard = () => {
     yearProgress: null,
     hasCurriculum: false,
     theme: '',
+    onboarding: null,
   });
 
   useEffect(() => {
@@ -69,6 +71,15 @@ const Dashboard = () => {
         console.warn('[Dashboard] Could not load curriculum data:', e.message);
       }
 
+      // Onboarding-track progress (independent of enrollment/curriculum). Guarded
+      // so a missing collection or empty KB never breaks the dashboard.
+      let onboarding = null;
+      try {
+        onboarding = await getOnboardingSummary(currentUser.id);
+      } catch (e) {
+        console.warn('[Dashboard] Could not load onboarding summary:', e.message);
+      }
+
       setDashData({
         topic,
         learnDone,
@@ -80,13 +91,19 @@ const Dashboard = () => {
         yearProgress,
         hasCurriculum: curriculumExists,
         theme: topic?.theme || '',
+        onboarding,
       });
     };
 
     load();
   }, [currentUser, weekNumber]);
 
-  const { topic, learnDone, testResult, top3, myRank, myPoints, activity, yearProgress, hasCurriculum: curriculumActive, theme } = dashData;
+  const { topic, learnDone, testResult, top3, myRank, myPoints, activity, yearProgress, hasCurriculum: curriculumActive, onboarding } = dashData;
+  const onboardingLabel = onboarding
+    ? (onboarding.allDone
+        ? 'Review onboarding'
+        : onboarding.daysCompleted > 0 ? 'Continue onboarding' : 'Start onboarding')
+    : 'Start onboarding';
   const currentCycle = getCurriculumCycle(weekNumber);
   const currWeek = getCurriculumWeek(weekNumber);
 
@@ -174,6 +191,31 @@ const Dashboard = () => {
               </div>
             ))}
           </div>
+
+          {/* Onboarding track CTA — only when there are themes to introduce. */}
+          {onboarding && onboarding.themesTotal > 0 && (
+            <div className="mt-5 pt-5 border-t border-bg-warm flex flex-col sm:flex-row sm:items-center justify-between gap-3">
+              <div className="flex items-center gap-3">
+                <div className="w-9 h-9 rounded-[var(--r-org)] bg-teal/10 text-teal flex items-center justify-center shrink-0">
+                  <Rocket size={18} />
+                </div>
+                <div>
+                  <p className="font-bold flex items-center gap-2">
+                    New here? Take the 5-day onboarding
+                    <Tag variant={onboarding.allDone ? 'success' : 'accent'} className="text-[10px]">
+                      {onboarding.allDone ? 'Onboarding complete' : `${onboarding.daysCompleted}/${onboarding.dayCount} days`}
+                    </Tag>
+                  </p>
+                  <p className="text-sm text-fg-muted">A light tour of every theme — how Respellion works day to day and week to week.</p>
+                </div>
+              </div>
+              <Link to="/onboarding-track" className="shrink-0">
+                <Button variant="outline" className="whitespace-nowrap">
+                  {onboardingLabel} <ArrowRight size={16} className="ml-1" />
+                </Button>
+              </Link>
+            </div>
+          )}
         </Card>
       )}
 

src/pages/OnboardingTrack.jsx

@@ -0,0 +1,326 @@
+import { useEffect, useMemo, useState } from 'react';
+import { Link } from 'react-router-dom';
+import {
+  Loader, Rocket, ArrowLeft, ChevronRight, CheckCircle2, Circle,
+  Sparkles, ListChecks, PartyPopper,
+} from 'lucide-react';
+import Card from '../components/ui/Card';
+import Button from '../components/ui/Button';
+import Tag from '../components/ui/Tag';
+import { useApp } from '../store/AppContext';
+import {
+  getOnboardingPlan,
+  getCompletedThemes,
+  getOrGenerateOnboardingOverview,
+  markThemeCompleted,
+  computeOnboardingProgress,
+} from '../lib/onboardingService';
+
+function normalizeContent(raw) {
+  if (!raw) return null;
+  if (typeof raw === 'string') {
+    try { return JSON.parse(raw); } catch { return null; }
+  }
+  return raw;
+}
+
+// ── Per-theme overview view ──────────────────────────────────────────────────
+function OnboardingThemeView({ theme, topics, done, onBack, onDone }) {
+  const [record, setRecord] = useState(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState(null);
+  const [marked, setMarked] = useState(done);
+
+  useEffect(() => {
+    let cancelled = false;
+    setLoading(true);
+    setError(null);
+    getOrGenerateOnboardingOverview(theme, topics)
+      .then((rec) => { if (!cancelled) setRecord(rec); })
+      .catch((err) => { if (!cancelled) setError(err.message || 'Failed to load the overview.'); })
+      .finally(() => { if (!cancelled) setLoading(false); });
+    return () => { cancelled = true; };
+  }, [theme]); // eslint-disable-line react-hooks/exhaustive-deps
+
+  const content = normalizeContent(record?.content);
+
+  const handleDone = async () => {
+    if (marked) return;
+    setMarked(true);
+    await onDone(theme);
+  };
+
+  return (
+    <div className="space-y-6">
+      <button
+        type="button"
+        onClick={onBack}
+        className="inline-flex items-center text-teal font-medium text-sm hover:underline"
+      >
+        <ArrowLeft size={16} className="mr-1" /> Back to overview
+      </button>
+
+      {loading && (
+        <Card className="w-full text-center py-16">
+          <Loader size={48} className="mx-auto text-teal animate-spin mb-4" />
+          <p className="font-medium text-lg">Preparing this theme…</p>
+          <p className="text-fg-muted text-sm mt-2">This may take 10–30 seconds the first time — the result is cached.</p>
+        </Card>
+      )}
+
+      {!loading && error && (
+        <Card className="w-full border border-red-200 bg-red-50 text-red-900 p-6">
+          <p className="font-bold mb-1">Could not load this theme</p>
+          <p className="text-sm">{error}</p>
+        </Card>
+      )}
+
+      {!loading && !error && content && (
+        <>
+          <Card className="w-full p-6">
+            <div className="flex items-center gap-2 mb-3">
+              <Sparkles size={18} className="text-teal" />
+              <Tag variant="dark" className="text-[10px] uppercase tracking-wide">Theme</Tag>
+              {marked && <Tag variant="success" className="text-[10px]">Done</Tag>}
+            </div>
+            <h2 className="text-2xl md:text-3xl font-bold text-teal mb-2">{content.title}</h2>
+            <p className="text-fg-muted">{content.what_it_is}</p>
+          </Card>
+
+          <Card className="w-full p-6">
+            <h3 className="text-lg font-bold mb-2">Why it matters here</h3>
+            <p className="text-fg-muted">{content.why_it_matters}</p>
+          </Card>
+
+          <Card className="w-full p-6">
+            <h3 className="text-lg font-bold mb-3">Key points</h3>
+            <ul className="list-disc pl-5 space-y-1 text-sm">
+              {(content.key_points || []).map((p, i) => <li key={i}>{p}</li>)}
+            </ul>
+          </Card>
+
+          {Array.isArray(content.topics_covered) && content.topics_covered.length > 0 && (
+            <Card className="w-full p-6">
+              <h3 className="text-lg font-bold mb-3">Topics in this theme</h3>
+              <div className="flex flex-wrap gap-2">
+                {content.topics_covered.map((t) => (
+                  <Tag key={t.topic_id} variant="default" className="text-xs">{t.label}</Tag>
+                ))}
+              </div>
+            </Card>
+          )}
+
+          <div className="flex justify-end">
+            <Button onClick={handleDone} disabled={marked}>
+              {marked
+                ? <span className="flex items-center"><CheckCircle2 size={16} className="mr-2" /> Marked as done</span>
+                : 'Mark as done'}
+            </Button>
+          </div>
+        </>
+      )}
+    </div>
+  );
+}
+
+// ── Progress ring ─────────────────────────────────────────────────────────────
+function ProgressRing({ percentage }) {
+  return (
+    <div className="relative w-20 h-20 shrink-0">
+      <svg viewBox="0 0 36 36" className="w-20 h-20 -rotate-90">
+        <circle cx="18" cy="18" r="15.9155" fill="none" stroke="var(--bg-warm)" strokeWidth="3" />
+        <circle
+          cx="18" cy="18" r="15.9155" fill="none" stroke="var(--teal)" strokeWidth="3"
+          strokeDasharray={`${percentage} 100`} strokeLinecap="round"
+        />
+      </svg>
+      <div className="absolute inset-0 flex items-center justify-center text-sm font-bold">{percentage}%</div>
+    </div>
+  );
+}
+
+// ── Page ──────────────────────────────────────────────────────────────────────
+export default function OnboardingTrack() {
+  const { state } = useApp();
+  const { currentUser } = state;
+
+  const [plan, setPlan] = useState(null);
+  const [completed, setCompleted] = useState(new Set());
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState(null);
+  const [selectedTheme, setSelectedTheme] = useState(null);
+
+  useEffect(() => {
+    if (!currentUser) return;
+    let cancelled = false;
+    setLoading(true);
+    Promise.all([getOnboardingPlan(), getCompletedThemes(currentUser.id)])
+      .then(([p, done]) => { if (!cancelled) { setPlan(p); setCompleted(done); } })
+      .catch((err) => { if (!cancelled) setError(err.message || 'Failed to load the onboarding track.'); })
+      .finally(() => { if (!cancelled) setLoading(false); });
+    return () => { cancelled = true; };
+  }, [currentUser]);
+
+  const progress = useMemo(
+    () => computeOnboardingProgress(plan?.days || [], completed),
+    [plan, completed],
+  );
+
+  const handleThemeDone = async (theme) => {
+    await markThemeCompleted(currentUser.id, theme);
+    setCompleted((prev) => new Set(prev).add(theme));
+    setSelectedTheme(null);
+  };
+
+  if (loading) {
+    return (
+      <div className="p-6 md:p-10">
+        <Card className="w-full text-center py-16">
+          <Loader size={48} className="mx-auto text-teal animate-spin mb-4" />
+          <p className="font-medium text-lg">Loading your onboarding track…</p>
+        </Card>
+      </div>
+    );
+  }
+
+  if (error) {
+    return (
+      <div className="p-6 md:p-10">
+        <Card className="w-full border border-red-200 bg-red-50 text-red-900 p-6">
+          <p className="font-bold mb-1">Could not load the onboarding track</p>
+          <p className="text-sm">{error}</p>
+        </Card>
+      </div>
+    );
+  }
+
+  // Empty KB → friendly empty state.
+  if (!plan || plan.themes.length === 0) {
+    return (
+      <div className="p-6 md:p-10 space-y-6">
+        <header>
+          <h1 className="text-3xl md:text-4xl font-bold mb-2 flex items-center gap-3"><Rocket size={28} className="text-teal" /> Onboarding</h1>
+        </header>
+        <Card className="w-full p-8 text-center">
+          <p className="text-fg-muted">There are no themes to introduce yet. Once the knowledge base has content, your 5-day onboarding track will appear here.</p>
+          <div className="mt-4"><Link to="/"><Button variant="outline">Back to dashboard</Button></Link></div>
+        </Card>
+      </div>
+    );
+  }
+
+  const themeTopics = (theme) => plan.themeTopicMap.get(theme) || [];
+
+  if (selectedTheme) {
+    return (
+      <div className="p-6 md:p-10 animate-in fade-in slide-in-from-bottom-4 duration-500">
+        <OnboardingThemeView
+          theme={selectedTheme}
+          topics={themeTopics(selectedTheme)}
+          done={completed.has(selectedTheme)}
+          onBack={() => setSelectedTheme(null)}
+          onDone={handleThemeDone}
+        />
+      </div>
+    );
+  }
+
+  return (
+    <div className="p-6 md:p-10 space-y-8 animate-in fade-in slide-in-from-bottom-4 duration-500">
+      <header className="flex items-start justify-between gap-4">
+        <div>
+          <h1 className="text-3xl md:text-4xl font-bold mb-2 flex items-center gap-3"><Rocket size={28} className="text-teal" /> Onboarding</h1>
+          <p className="text-fg-muted text-lg max-w-2xl">
+            A light, self-paced tour of every theme at Respellion, spread over about five days.
+            It gives you the breadth you need to understand how we work day to day and week to week —
+            you can go faster if you like.
+          </p>
+        </div>
+      </header>
+
+      <Card className="border border-bg-warm">
+        <div className="flex items-center gap-5">
+          <ProgressRing percentage={progress.percentage} />
+          <div className="flex-1">
+            <p className="font-bold text-lg">
+              {progress.allDone
+                ? 'Onboarding complete'
+                : `${progress.daysCompleted}/${progress.dayCount} days complete`}
+            </p>
+            <p className="text-fg-muted text-sm">{progress.themesDone} of {progress.themesTotal} themes done</p>
+            <div className="flex gap-1.5 mt-3">
+              {plan.days.map((d) => {
+                const dayDone = d.themes.every((t) => completed.has(t));
+                return (
+                  <div
+                    key={d.day}
+                    title={`Day ${d.day}`}
+                    className={`h-2 flex-1 rounded-full ${dayDone ? 'bg-teal' : 'bg-bg-warm'}`}
+                  />
+                );
+              })}
+            </div>
+          </div>
+        </div>
+      </Card>
+
+      {progress.allDone && (
+        <Card className="w-full p-6 border border-teal/30 bg-sage/40">
+          <div className="flex items-start gap-3">
+            <PartyPopper size={24} className="text-teal shrink-0 mt-0.5" />
+            <div>
+              <h3 className="text-lg font-bold">You've completed the onboarding track 🎉</h3>
+              <p className="text-fg-muted text-sm mt-1">
+                You've been introduced to every theme. You're ready to pick up a first assignment —
+                and you can revisit any theme below whenever you want a refresher.
+              </p>
+              <div className="mt-3"><Link to="/"><Button>Back to dashboard</Button></Link></div>
+            </div>
+          </div>
+        </Card>
+      )}
+
+      <div className="space-y-6">
+        {plan.days.map((d) => {
+          const doneCount = d.themes.filter((t) => completed.has(t)).length;
+          return (
+            <Card key={d.day} className="p-0 border border-bg-warm overflow-hidden">
+              <div className="flex items-center justify-between px-5 py-3 bg-bg-warm/40 border-b border-bg-warm">
+                <div className="flex items-center gap-2">
+                  <Tag variant="dark" className="text-[10px] uppercase tracking-wide">Day {d.day}</Tag>
+                  <ListChecks size={16} className="text-fg-muted" />
+                </div>
+                <span className="text-sm text-fg-muted">{doneCount}/{d.themes.length} done</span>
+              </div>
+              <div className="divide-y divide-bg-warm">
+                {d.themes.map((theme) => {
+                  const isDone = completed.has(theme);
+                  const count = themeTopics(theme).length;
+                  return (
+                    <button
+                      key={theme}
+                      type="button"
+                      onClick={() => setSelectedTheme(theme)}
+                      className="w-full flex items-center justify-between p-4 text-left hover:bg-bg-warm/30 transition-colors"
+                    >
+                      <div className="flex items-center gap-3">
+                        {isDone
+                          ? <CheckCircle2 size={20} className="text-teal shrink-0" />
+                          : <Circle size={20} className="text-fg-muted/40 shrink-0" />}
+                        <div>
+                          <p className="font-medium">{theme}</p>
+                          <p className="text-sm text-fg-muted">{count} {count === 1 ? 'topic' : 'topics'}</p>
+                        </div>
+                      </div>
+                      <ChevronRight size={18} className="text-fg-muted" />
+                    </button>
+                  );
+                })}
+              </div>
+            </Card>
+          );
+        })}
+      </div>
+    </div>
+  );
+}