docs: record client-reliability-4 URL queue reproduction

docs/TODO.md

@@ -13,6 +13,8 @@
 
 ## client-reliability
 
+- 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.
+
 - 2026-10-19: client-reliability-1 assigned: reproduce/classify and fix profile-modal suite hang without weakening assertions. Initial evidence: three isolated 60s timeouts (one clean environment), full baseline stopped at file 220/425; read docs/agents/prompts/client-reliability.md and claim the item. Scope excludes app.js and unrelated subsystems.
 
 - 2026-10-19: client-reliability-1 fix committed at dbdac18d (test-only fixture, original assertions preserved; native focus contract and both mutants fail when broken). Isolated27/27 natural exit2.44s, lint11/11. Full60s/file run passed226/425 files including profile-modal; file227 tests/race/nostr-client-init-race.test.mjs timed out;198 later files untested. Await dispatch routing for this unowned blocker before normal landing/close. No product/browser/build qualification or landing claimed. See test_logs/TEST_LOG_2026-10-19_20-13-00_client-reliability-final.md.

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

@@ -1,9 +1,9 @@
 {
-  "id": "client-reliability-4",
-  "area": "client-reliability",
-  "status": "open",
-  "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"
 }