Tick the server batched-VAD plan up to the committed Bun and sidecar work

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/plans/001-5-server-batched-vad.md

@@ -47,8 +47,10 @@ Bun side: `SidecarTranscribeRequest.mode`, `createSidecar` forwards it, `live.ts
 **Files:** `/home/user/ws5-bench/bench.py` (not committed).
 
 - [x] Venv `/home/user/venvs/faster-whisper` with requirements + jiwer (under lock); confirm API.
-- [ ] large-v3-turbo, both clips: `base` (current sidecar), `vad`, `batched` (vad+bs8),
+- [x] large-v3-turbo, both clips: `base` (current sidecar), `vad`, `batched` (vad+bs8),
       `batched_b1` (beam 1). Record wall, WER (repo normalize), first-segment time, max gap.
+      Done 2026-10-29 (`/home/user/ws5-bench/turbo-*.jsonl`); VAD-parameter follow-up in
+      `diag2.out` / `round3-*.jsonl` (threshold 0.2 + pad 800 ms recovers most deletions).
 - [ ] Live-style passes (clip sliced into 6 s pieces): `live_seq` vs `live_batched` vs `live_vad`.
 - [ ] medium.en on en_alien: `base` vs `batched` if time allows.
 - [ ] Decide: beam size, live mode routing.
@@ -69,24 +71,24 @@ Bun side: `SidecarTranscribeRequest.mode`, `createSidecar` forwards it, `live.ts
   inherits env; set `process.env.PYTHONPATH` around the test or pass `env` — add optional
   `env` arg only if needed).
 
-- [ ] Failing tests: default/`file` → batched with `vad_filter=True batch_size=8`; `live` →
+- [x] Failing tests: default/`file` → batched with `vad_filter=True batch_size=8`; `live` →
       sequential, no `vad_filter`; model switch reloads and pipeline wraps the new model, same model
       doesn't reload; `slow` + abort → `cancelled: true`, < 20 segments; `silence` → done, 0 segments.
-- [ ] Implement in `sidecar.py`; update docstring protocol; cite D-WS5a.
-- [ ] Green; commit.
+- [x] Implement in `sidecar.py`; update docstring protocol; cite D-WS5a.
+- [x] Green; commit.
 
 ### Task 3: Bun side — `mode` field, live sends `"live"`, heartbeat test
 
 **Files:** `src/server/transcribe.ts`, `src/server/live.ts`, `tests/fixtures/fake_sidecar.py`,
 `tests/transcribe.test.ts`, `tests/server-live.test.ts`
 
-- [ ] Failing tests: fake sidecar "ok" echoes `mode=`; `createSidecar` default sends `file`, explicit
+- [x] Failing tests: fake sidecar "ok" echoes `mode=`; `createSidecar` default sends `file`, explicit
       `live` forwarded; server-live test asserts the request has `mode: "live"`; HTTP handler passes
       no mode (⇒ file) — assert `requests[0].mode` undefined or `"file"`.
-- [ ] Heartbeat: `TranscribeDeps.heartbeatIntervalMs?` (default 5000); test with 20 ms and a fake
+- [x] Heartbeat: `TranscribeDeps.heartbeatIntervalMs?` (default 5000); test with 20 ms and a fake
       sidecar that waits ~120 ms before the first segment; the response text contains ≥ 2 blank
       lines before the first segment line.
-- [ ] Implement; typecheck; commit.
+- [x] Implement; typecheck; commit.
 
 ### Task 4: Real-model verification + docs