diff --git a/PLAN.md b/PLAN.md
index 81a2473..efd7759 100644
--- a/PLAN.md
+++ b/PLAN.md
@@ -1,5 +1,9 @@
 # Plan — UI/UX polish bundle (items 1–4 + 7)
 
+**STATUS: complete** — every item below shipped (see git log, c2461f8 and
+friends). Kept as the planning record; the "deferred" list at the bottom
+is stale (favicon, a11y pass, autoplay-next were all done afterwards).
+
 The agreed bundle from the polish list:
 
 1. **Loading states** — skeleton cards + player spinner
diff --git a/README.md b/README.md
index e132064..5b9e6ae 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ Account management (no self-signup by design):
 ```
 
 Security: passwords are PBKDF2-SHA256 (210k iters, per-user salts) in
-`server/data/users.json` (0600). Sessions are signed 30-day `HttpOnly`
+`server/data/aniweb.db` (SQLite, 0600). Sessions are signed 30-day `HttpOnly`
 `SameSite=Lax` cookies; `run.sh` sets `ANIWEB_SECURE=1` so cookies are
 `Secure` and only work through your HTTPS proxy. Accounts deleted via
 the app or CLI are rejected immediately, even with an old cookie.
@@ -45,7 +45,7 @@ the app or CLI are rejected immediately, even with an old cookie.
 Accounts are created from the CLI only — there is no signup screen,
 because the app is meant to sit behind your proxy on the open
 internet. Each user gets a fully isolated watch history
-(`server/data/history/<user>.json`): nothing is stored in the browser,
+(`server/data/aniweb.db`, SQLite): nothing is stored in the browser,
 so a new device picks up your exact watch state after login. Deleting
 an account (hamburger menu → delete, or `server.users rm`) kills its
 session cookies immediately and removes its history.
@@ -77,10 +77,20 @@ detail view: synopsis, stats, season tabs, and filler badges.
 
 Playback is HLS through a backend proxy (`/stream/{token}`) — the
 video CDN sends no CORS headers, so the browser can't fetch it
-directly. hls.js handles ABR across 1080/720/360p.
+directly. The CDN serves a single quality (no ABR); the proxy pulls
+each segment across 16 parallel byte-range lanes (falling back to a
+single stream if the CDN refuses ranges), so a slow connection doesn't
+stall playback.
 
 - **Resume** — autoplay on open, resumes at the saved position; the
   position is saved every ~10s
+- **Skip intro** — MAL/Jikan intro timings (30-day cache) drive a
+  "skip intro ⏭" pill while the intro window is on screen
+- **Episode names** — MAL titles (via keyless Jikan) in the episode
+  tooltips and the "now playing" line
+- **Buffering UI** — spinner overlay, a buffer-ahead gauge under the
+  video, and a CDN chip (live KB/s from `/api/cdn`, amber when the CDN
+  is degraded)
 - **Dub/sub toggle**, **playback speed** (0.5–2×, remembered), and a
   **hide fillers** switch (fillers are badged and skipped by
   prev/next/auto-next)
@@ -117,6 +127,16 @@ SPEC.md   design + the verified anidb.app data flow
   backend HLS proxy (`/stream/{token}`), which rewrites playlist URIs.
 - `.venv/bin/python server/upstream.py` runs a self-check of the
   fetchers (search → details → episodes → dub stream for Chainsaw Man).
+- A background probe fetches 64KB from the CDN every 3 min and logs
+  state flips to `server.log`; `GET /api/cdn` (public) returns the
+  latest throughput + ~1h history. Use it to check if "playback
+  broken" is the CDN again.
+- The front-end is version-pinned: bump `?v=N` on `app.js`/`style.css`
+  in `index.html` on every static change — phones/proxies otherwise
+  serve stale JS (index.html itself is `no-store`).
+- Playback failures self-report: the client posts a step timeline +
+  capability fingerprint to `/api/events` (see the `events` table),
+  so a broken browser is diagnosable from the server.
 - `.venv/bin/pytest tests/ -q` runs the full test suite against a
   throwaway server (:8399, temp data dir — never touches the real
   data). The API tests use stdlib only; the browser tests need
diff --git a/SPEC.md b/SPEC.md
index 6adefb2..00e9a22 100644
--- a/SPEC.md
+++ b/SPEC.md
@@ -18,7 +18,7 @@ last 20), and the front-end lives in `static/` with the server code in
 | 3. Episodes | `GET anidb.app/api/frontend/anime/{id}/episodes` | JSON `{episodes: [{id, number, number2, filler}]}` |
 | 4. Languages | `GET anidb.app/api/frontend/episode/{ep_id}/languages` | JSON `{languages: [{code: "jpn"\|"eng", name, embed_url}]}` — `jpn`=sub, `eng`=dub |
 | 5. Embed page | `GET {embed_url}` | JS blob containing `file: '<master m3u8>'` |
-| 6. Master playlist | `GET {master m3u8}` (hls.anidb.app) | variants: 1080p / 720p / 360p |
+| 6. Master playlist | `GET {master m3u8}` (hls.anidb.app) | single rendition (v1) — no ABR ladders |
 | 7. Variants + segments | `GET ...m3u8`, `.ts` | streamable HLS — **NO CORS headers** |
 
 Key constraint: anidb.app sits behind Cloudflare (plain curl → 403).
@@ -85,7 +85,8 @@ produced black screens.
 Flow: search box → results grid (poster + title, click) → detail view
 (synopsis under the episode grid, season tabs) → episode grid (number
 + filler badge, sub/dub toggle) → `<video>` with hls.js pointed at
-`/stream/{token}`; quality follows the master playlist (auto ABR).
+`/stream/{token}`; single quality — the proxy fetches each segment
+across parallel byte-range lanes (single-stream fallback).
 
 - Default play: opening an anime resumes the last watched episode of
   the season (seeking to the saved position unless ≥95% through),