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+# tracker-web — Backend Enablers
+
+> Follow-ups that **cannot ship from `dashboards/tracker-web` alone** because they require a change
+> to the shared `services/platform-service`. They are the only remaining items on the
+> [UX integration roadmap](UX_INTEGRATION_BYTELYST.md) and are **excluded from its ✅ count** until
+> the backend enabler lands.
+>
+> **Hard constraint for every item below:** `platform-service` is **shared by 9 products**
+> (LysnrAI, MindLyst, ChronoMind, JarvisJr, NomGap, PeakPulse, FlowMonk, NoteLett, ActionTrail,
+> EffoRise, LocalMemGPT — see `AGENTS.md`). Every change here **must be additive and
+> backward-compatible**: no behavioural change for products that do not opt in, existing rows/reads
+> keep working, and every persisted document keeps its `productId`.
+
+| ID   | Title                                                 | Blocks                         | Target module                                                             | Status         |
+| ---- | ----------------------------------------------------- | ------------------------------ | ------------------------------------------------------------------------- | -------------- |
+| BE-1 | Server-side HTML sanitization for item/comment bodies | UX-12.3 (rich-text)            | `services/platform-service` — items + comments write paths                | 🔒 Not started |
+| BE-2 | Tracker-event notifications feed                      | UX-13.1 (`NotificationCenter`) | `services/platform-service` — notifications module + `/api/tracker` proxy | 🔒 Not started |
+
+---
+
+## BE-1 — Server-side HTML sanitization for `items.description` + `comments.body`
+
+- **Title:** Sanitize rich HTML on the item-description and comment-body write paths.
+- **Blocking roadmap item:** [UX-12.3](UX_INTEGRATION_BYTELYST.md#ux-12--detail--board-richness-tabs--tooltip--drawer--timeline--rich-text)
+  — adopt `@bytelyst/rich-text` `RichTextEditor` / `RichTextViewer` in tracker-web.
+- **Target module:** `services/platform-service` — the **items** module (`items.description`) and the
+  **comments** module (`comments.body`), applied **server-side before persist** (create + update).
+- **Why it's blocked:** Today `TrackerItem.description` and `Comment.body` are plain `string`s
+  rendered with `whitespace-pre-wrap`; the `/api/tracker/*` proxy neither stores nor sanitizes rich
+  HTML. Adopting a rich-text editor client-side would persist attacker-controlled HTML with no
+  server-side sanitization (stored-XSS), so it must not be done until the backend guarantees safety.
+
+### Acceptance criteria
+
+- HTML is sanitized **on the server** (never trust the client) on every write to `items.description`
+  and `comments.body` (create and update).
+- **Allowlist** of formatting tags only — e.g. `p`, `br`, `strong`, `em`, `u`, `s`, `a`,
+  `ul`/`ol`/`li`, `blockquote`, `code`, `pre`, `h1`–`h3`. Everything else is stripped/escaped.
+- **Attribute allowlist:** only safe attributes survive; `a[href]` is restricted to
+  `http:` / `https:` / `mailto:` schemes (and gets `rel="noopener noreferrer"`).
+- **Stripped unconditionally:** `<script>` / `<style>` / `<iframe>` / `<object>`, all inline
+  event-handler attributes (`on*`), and `javascript:` / `data:` URLs.
+- Output is idempotent (sanitizing already-sanitized content is a no-op) and length-bounded as today.
+- **Backward-compatible:** existing plain-text rows still read correctly; products that send plain
+  text are unaffected; the response shape is unchanged. **No behavioural change for the other 8
+  products** sharing `platform-service`.
+- Unit tests cover the XSS vectors above (script injection, `onerror=`, `javascript:` href,
+  `data:` URI, mismatched/oversized tags).
+
+### Unblocks (tracker-web side, once shipped)
+
+- Swap the description/comment `<textarea>` for `RichTextEditor` (compose) and render saved content
+  with `RichTextViewer` — no client-side `dangerouslySetInnerHTML` of unsanitized content.
+
+---
+
+## BE-2 — Tracker-event notifications feed
+
+- **Title:** Emit + expose a per-user notifications feed for tracker events.
+- **Blocking roadmap item:** [UX-13.1](UX_INTEGRATION_BYTELYST.md#ux-13--notifications-surface-via-bytelystnotifications-ui-stretch--data-gated)
+  — mount `NotificationCenter` (bell + `InboxItem` rows) in tracker-web.
+- **Target module:** `services/platform-service` — its **existing notifications module** (event
+  emission) + the `/api/tracker` proxy (read surface).
+- **Why it's blocked:** tracker exposes **no notifications feed** — the `/api/tracker/*` proxy
+  surfaces only items / comments / votes / roadmap. `NotificationCenter`/`InboxItem` have nothing to
+  bind to, so only the client-side `BannerStack`/`Announcement` (UX-13.2) shipped.
+
+### Acceptance criteria
+
+- Tracker events emit notifications into the **existing** notifications module — at minimum:
+  **new comment**, **status change**, and **vote milestone** (e.g. crossing 10/25/50 votes).
+- Each notification is **fanned out to the item author and any subscribers/watchers** of the item,
+  and is **stamped with `productId`** so the feed is product-scoped.
+- A read API (list with pagination, unread count, mark-as-read / mark-all-read) is **exposed through
+  the `/api/tracker` proxy** so the dashboard reads it with the existing auth token.
+- Payload shape is compatible with `@bytelyst/notifications-ui` `InboxItem` (id, title/body, type,
+  timestamp, read flag, deep-link to the item).
+- **Additive / backward-compatible:** emitting these notifications causes **no behavioural change for
+  the 9 products that do not subscribe**; the notifications module contract is extended, not broken;
+  every notification document carries `productId`.
+- Tests cover emission on each event type, author/subscriber targeting, product scoping, and the
+  unread-count / mark-as-read transitions.
+
+### Unblocks (tracker-web side, once shipped)
+
+- Bind `NotificationCenter` to the feed (bell + `InboxItem` rows) in the AppShell sidebar/header,
+  reading via the `/api/tracker` proxy.
diff --git a/dashboards/tracker-web/docs/roadmaps/UX_INTEGRATION_BYTELYST.md b/dashboards/tracker-web/docs/roadmaps/UX_INTEGRATION_BYTELYST.md
index 79f6d4b4..3234ca99 100644
--- a/dashboards/tracker-web/docs/roadmaps/UX_INTEGRATION_BYTELYST.md
+++ b/dashboards/tracker-web/docs/roadmaps/UX_INTEGRATION_BYTELYST.md
@@ -275,27 +275,52 @@ pnpm build      # final gate
       activity/comment history with `Timeline`.
       (Edit + Delete now live in an `ActionMenu` in the page header; comments render via
       `Timeline`. UX-12.2 `32dac7d4`: tc/lint/test 162 ✓/build/e2e 18 ✓.)
-- [ ] **12.3** _(stretch — needs HTML-capable description/comment storage)_ Swap the plain
-      description/comment `<textarea>` for `RichTextEditor`, and render saved content with
-      `RichTextViewer`. **Only do this if** the backend stores/returns rich HTML safely;
-      otherwise leave `- [ ]` with a note. **Verify per task:** `pnpm typecheck && pnpm lint && pnpm build`.
+- [ ] 🔒 **12.3 — BLOCKED ON BACKEND** _(stretch — needs HTML-capable description/comment storage)_
+      Swap the plain description/comment `<textarea>` for `RichTextEditor`, and render saved content
+      with `RichTextViewer`. **Only do this if** the backend stores/returns rich HTML safely.
+      **Verify per task:** `pnpm typecheck && pnpm lint && pnpm build`.
       DEFERRED (data-gated): `TrackerItem.description` and `Comment.body` are plain `string`s
       rendered with `whitespace-pre-wrap`; the `/api/tracker/*` proxy does not store or sanitize
       rich HTML. Adopting `RichTextEditor` would persist HTML with no backend sanitization (XSS
       risk) and mismatch the plain-text model, so `@bytelyst/rich-text` is intentionally not
-      adopted until the backend supports safe rich HTML. No dep added.
+      adopted until the backend supports safe rich HTML. No dep added. **Kept out of the ✅ count.**
+
+      > **Required platform-service change** (see [`BACKEND_ENABLERS.md`](BACKEND_ENABLERS.md) §BE-1):
+      > Add server-side HTML sanitization on the **write** paths for `items.description` and
+      > `comments.body` in `services/platform-service` (the items + comments modules, before persist).
+      > The sanitizer must apply a strict allowlist of formatting tags (e.g. `p`, `br`, `strong`,
+      > `em`, `u`, `s`, `a`, `ul`/`ol`/`li`, `blockquote`, `code`, `pre`, headings) and safe attributes
+      > (`a[href]` restricted to `http`/`https`/`mailto`), and **strip** all `<script>`/`<style>`,
+      > inline event-handler attributes (`on*`), and `javascript:`/`data:` URLs. Sanitization must run
+      > on the server (never trust the client), preserve the existing plain-text reads for old rows,
+      > and be backward-compatible since the field is shared by every product. Once stored HTML is
+      > guaranteed safe, tracker-web can adopt `RichTextEditor` (compose) + `RichTextViewer` (render)
+      > with no client-side `dangerouslySetInnerHTML` of unsanitized content.
 
 ## UX-13 — Notifications surface via `@bytelyst/notifications-ui` (stretch / data-gated)
 
 > **Gate:** only build this if tracker has (or will get) a notifications data source. If there
 > is no feed, ship just the `BannerStack` for client-side system messages and leave the rest `- [ ]`.
 
-- [ ] **13.1** Add `@bytelyst/notifications-ui`; mount a `NotificationCenter` bell in the header
-      (or AppShell from UX-8) fed by the notifications API, with `InboxItem` rows.
+- [ ] 🔒 **13.1 — BLOCKED ON BACKEND** Add `@bytelyst/notifications-ui`; mount a `NotificationCenter`
+      bell in the header (or AppShell from UX-8) fed by the notifications API, with `InboxItem` rows.
       DEFERRED (data-gated): tracker exposes no notifications feed — the `/api/tracker/*` proxy
       surfaces only items/comments/votes/roadmap, with no notifications endpoint. Per the wave
       gate, `NotificationCenter`/`InboxItem` are left unbuilt until a feed exists. The dep is
       added and the imports are smoke-tested so a future feed wiring starts from green.
+      **Kept out of the ✅ count.**
+
+      > **Required platform-service change** (see [`BACKEND_ENABLERS.md`](BACKEND_ENABLERS.md) §BE-2):
+      > Emit notifications into platform-service's **existing notifications module** on tracker
+      > events — at minimum **new comment**, **status change**, and **vote milestones** — fanned out
+      > to the item author and any subscribers/watchers, each stamped with `productId` so the feed
+      > stays product-scoped. Expose the resulting feed (list + unread count + mark-as-read) through
+      > the `/api/tracker` proxy so the dashboard can read it with the existing token, and keep the
+      > payload shape compatible with `@bytelyst/notifications-ui` `InboxItem`. The change must be
+      > additive/backward-compatible (platform-service is shared by 9 products — no behavioural change
+      > for products that do not subscribe). Once the feed exists, tracker-web binds `NotificationCenter`
+      > to it (bell + `InboxItem` rows) in the AppShell sidebar/header.
+
 - [x] **13.2** Use `BannerStack` for top-of-page system/maintenance messages and `Announcement`
       for a dismissible "what's new" pill. **Verify:** `pnpm typecheck && pnpm lint && pnpm build`.
       (Added `@bytelyst/notifications-ui` workspace dep with a minimal `link:` lockfile entry;
@@ -348,9 +373,17 @@ pnpm build      # final gate
 
 ```
 Core   : UX-1 ✅  UX-2 ✅  UX-3 ✅  UX-4 ✅  UX-5 ✅  UX-6 ✅  UX-7 ✅  UX-8 ✅
-Expand : UX-9 ✅  UX-10 ✅  UX-11 ✅  UX-12 ✅  UX-13 ✅   (stretch: 12.3, 13.1 deferred — see notes)
+Expand : UX-9 ✅  UX-10 ✅  UX-11 ✅  UX-12 ✅  UX-13 ✅
+Backend-blocked (not in ✅ count) : UX-12.3 🔒  UX-13.1 🔒   (see BACKEND_ENABLERS.md)
 ```
 
+**All client-only waves are complete.** Every task that can ship from `dashboards/tracker-web`
+alone (Core UX-2 … UX-8 and Expand UX-9 … UX-13) is done. The only remaining items — **UX-12.3**
+(rich-text) and **UX-13.1** (notifications feed) — are **🔒 blocked on a shared `platform-service`
+change**, not on tracker-web. They are tracked as follow-ups in
+[`BACKEND_ENABLERS.md`](BACKEND_ENABLERS.md) and are intentionally excluded from the ✅ count until
+the backend enabler lands.
+
 **UX-1 is done** (token bridge + Primitives adapter, commit `dc01dd02`) — the `--bl-*` bridge is
 live, so shared components already inherit tracker's theme. **Start with UX-2.** Before editing,
 read `src/app/globals.css` (the `--bl-*` bridge), `src/components/ui/Primitives.tsx` (the adapter
@@ -379,8 +412,12 @@ conventional commit referencing its roadmap ID:
 | UX-12.2     | `32dac7d4` | item-detail `ActionMenu` + `Timeline` comments             |
 | UX-13.2     | `3d22c303` | `BannerStack` + `Announcement` system messaging            |
 
-**Deferred (data-gated, documented above):** UX-12.3 (`RichTextEditor` — backend stores plain
-text, no HTML sanitization) and UX-13.1 (`NotificationCenter` — no notifications feed). Both deps
-that are needed are wired/smoke-tested so a future enablement starts from green.
+**🔒 Blocked on backend (data-gated, not in the ✅ count):** UX-12.3 (`RichTextEditor` — needs
+server-side HTML sanitization on `items.description` + `comments.body`) and UX-13.1
+(`NotificationCenter` — needs a real notifications feed). Both are owned follow-ups tracked in
+[`BACKEND_ENABLERS.md`](BACKEND_ENABLERS.md); the needed client deps are already wired/smoke-tested
+so enablement starts from green once the shared `platform-service` change ships.
 
-**Out of scope for this run:** the **Core** waves UX-2 … UX-8 remain `⬜`.
+**Core waves UX-2 … UX-8 are complete** (see the per-item SHAs above) — every wave that can ship
+from `dashboards/tracker-web` alone is done. Nothing in this roadmap remains that is unblocked at
+the tracker-web layer.