docs: record client-reliability-4 merged-tree validation

docs/TODO.md

@@ -16,6 +16,8 @@
 
 ## client-reliability
 
+- 2026-10-20: item4 ready atce1381f5; full427/427 file exits0 with60s/file bound,focused22/22,lifecycle12/12,13 rejected/reverted mutants,lint11/11,build/artifact and Chromium+Firefox controlled native-observer smoke pass (obsolete starts0). Remaining normal queue/durable landing/ancestry then close/report. Actual fallback/live IO/active abort/CPU remain unverified.
+
 - 2026-10-20: item4 routed implementation in URL observer/controller complete locally;12 lifecycle scenarios and13 reverted mutants, focused/lint/build pass. Queued last-owner work settles without cache/mirror/stale UI; shared owners, immediate retry and hidden reveal covered. Remaining: native browser smoke/full merged-tree gate/normal landing/closure; active abort/fallback/CPU unverified.
 
 - 2026-10-20: client-reliability-4 investigation at4c54858c reproduces queued URL media start after feed disposal: active3/queued1 before and after disposal, then1 obsolete start(expected0); shared live-owner control deduplicates and receives healthy badge. Strict assertion exits1, diagnostic/control naturally exit0. No product/tests changed; awaiting dispatch fix routing. Active abort/browser/fallback/CPU unverified. Evidence: test_logs/TEST_LOG_2026-10-20_03-10-00_client-reliability-4.md.

docs/agents/backlog/client-reliability-4.json

@@ -1,9 +1,10 @@
 {
- "id": "client-reliability-4",
- "area": "client-reliability",
- "status": "in-progress",
- "title": "Reproduce remaining source-health cancellation defect at current HEAD before scoping a fix",
- "blockedOn": null,
- "addedOn": "2026-10-20",
- "filedAt": "604c8c61f4783717eb0cff7ca7ca33efb59aac8a"
+  "id": "client-reliability-4",
+  "area": "client-reliability",
+  "status": "in-progress",
+  "title": "Reproduce remaining source-health cancellation defect at current HEAD before scoping a fix",
+  "blockedOn": null,
+  "addedOn": "2026-10-20",
+  "filedAt": "604c8c61f4783717eb0cff7ca7ca33efb59aac8a",
+  "evidence": "Reproduced at4c54858c; bounded queued URL owner fix ce1381f5. Full427/427 files,focused22,new lifecycle12,13 reverted mutants,lint11,build and Chromium+Firefox controlled native observer smoke pass. Normal landing and closure pending; evidence test_logs/TEST_LOG_2026-10-20_03-23-30_client-reliability-4-ready.md"
 }

test_logs/TEST_LOG_2026-10-20_03-23-30_client-reliability-4-ready.md

@@ -0,0 +1,10 @@
+# client-reliability-4 ready on ce1381f50011aa71986b53c27def1b4f5aa33a44
+
+- `git merge unstable`: already up to date; product/tests unchanged after commit. No rebase.
+- `env -u NODE_TEST_CONTEXT UNIT_TEST_TIMEOUT_MS=60000 npm test`: natural exit0, all427/427 unit files,0 quarantined. `/tmp/item4-full.log` contains427 Running entries and final all-pass. Aggregate scenario count is not exposed by runner.
+- `npm run lint` on committed merged tree with approved git subprocess access: exit0, all11 stages (`/tmp/item4-lint-committed.log`). Original sandbox attempt failed EPERM, no gate relaxed.
+- `npm run build` on committed merged tree: exit0 including deploy-artifact verification (`/tmp/item4-build-committed.log`).
+- Focused4 files/22 scenarios pass; new lifecycle12/12,0 failed/cancelled/skipped.13 deliberately broken variants rejected/reverted; full mapping in TEST_INTEGRITY.md. Initial incorrect inherited --test-context invocation not counted.
+- `node /tmp/item4-browser.mjs` with approved loopback/browser access: exit0, Chromium+Firefox built-dist/native IntersectionObserver and controlled external media/fetch boundary. Each0 obsolete starts,3 initial media and final active0/queued0; shared live badge healthy/disposed checking; hidden reveal and hosted/torrent source-health visibility pass;0 page errors/external requests. Browser cache is a service twin; unit uses actual state/cache. Closed owned resources, released reservation, preview3000 untouched.
+- Baseline at4c54858c: queued obsolete starts1(expected0), independent dispatch reproduction confirmed. Regression fixed0; no CPU/RSS measurement/claim.
+- Remaining before completion: normal landq/durable landed status/unstable ancestry, backlog close and dispatch events. Unverified/out of scope: active HEAD/media/HLS/torrent abort, native media decoding/playback fallback/live peers, full Stage3, production/signers/wallet/deploy.

todo/TODO_2026-10-20_03-23-30_client-reliability-4-ready.md

@@ -0,0 +1,7 @@
+# client-reliability-4
+
+- [x] Reproduce and route bounded fix.
+- [x] Implement observer/controller ownership,12 lifecycle regressions and13 rejected mutants.
+- [x] Focused22,full427 files,lint11,build/artifact,native Chromium+Firefox controlled smoke.
+- [ ] Normal queue/durable landing and ancestry.
+- [ ] Close backlog, dispatch landing/final report; no next item.