land: area/client-reliability 4bc52f9ded (client-reliability)

context/CONTEXT_2026-10-20_13-30-00_client-reliability-5.md

@@ -0,0 +1,3 @@
+# client-reliability-5
+
+Investigation at0c1dd7e8:bounded active URL success/timeout cleanly settle; disposed active primary media error starts1 new mirror HEAD(expected0). Shared/rejoin and later same-source controls pass. Evidence test_logs/TEST_LOG_2026-10-20_13-30-00_client-reliability-5.md; scratch /tmp/bitvid-client-reliability-5-active-url.mjs. Await dispatch routing; no product/regression changes.

context/CONTEXT_2026-10-20_13-36-00_client-reliability-5.md

@@ -0,0 +1,3 @@
+# Item5 implementation
+
+Controller-only6-line pre-candidate ownership guard. Six new lifecycle scenarios reproduce2 baseline failures and pass18/18 fixed;6 reverted mutants rejected. Unique integrity note test_logs/TEST_INTEGRITY_client-reliability-5.md. Focused/lint/build running; awaiting explicit dispatch full-suite/browser slots and verified unstable merge before final checks/landing. No active abort/observer/cache/limit changes.

decisions/DECISIONS_2026-10-20_13-30-00_client-reliability-5.md

@@ -0,0 +1,3 @@
+# client-reliability-5
+
+Do not equate retained active work with a leak: explicit success and controlled real timeout release resources/slots and cache correctly. Route only demonstrated new mirror HEAD after disposal; guard candidate continuation in controller before considering active abort or broader resource policy. Existing observer token is sufficient.

decisions/DECISIONS_2026-10-20_13-36-00_client-reliability-5.md

@@ -0,0 +1,6 @@
+# Item5 continuation boundary
+
+- Keep bounded already-active success/failure caching. Check existing lifecycle owners only BEFORE starting each candidate in probeUrlList; zero owners marks existing record cancelled and returns explicit cancellation. No probe abort or observer/cache/TTL/concurrency change.
+- Shared and rejoining owners remain eligible because record owners are checked at continuation time. Completed final-source failure keeps original cache behavior; cancelled mirror chains never cache offline.
+- Six focused regressions exercise actual observer/controller/cache plus external IO twins; unique integrity file during parallel trial.
+- Dispatch resource coordination: local full suite is next after administrative drain but requires explicit grant; browser belongs initially to playback QA. All CLI/gate launches clear inherited NODE_TEST_CONTEXT operationally; no kit/runner change.

docs/TODO.md

@@ -28,6 +28,12 @@
 
 ## client-reliability
 
+- 2026-10-20: item5 ready atmergedf2a392fa(product12f92732):full427/427 files60s-bound exit0,focused28/lifecycle18,six reverted mutants,lint11/build-artifact/native Chromium+Firefox smoke pass;obsolete mirror HEAD1→0,shared/rejoin/retry/hidden reveal pass,0 external/pageerrors. Full-slot wait10m57s recorded;browser released,expensive slot held through normal landing. Remaining queue/durable ancestry/close;active abort/real playback/CPU unverified.
+
+- 2026-10-20: item5 routed controller-only pre-candidate guard implemented; baseline16pass/2fail→fixed18/18 lifecycle,6 rejected/reverted mutants,focused28/4files,lint11/build+artifact pass. No full/browser launch while dispatch administrative drain/QA reservation holds; slot requested13:32:54UTC,await explicit grant and verified unstable merge. No active abort/observer/cache/limits change; actual fallback/CPU unverified. Unique integrity/evidence in test_logs/*client-reliability-5*.
+
+- 2026-10-20: item5 investigation at0c1dd7e8:active URL success/real4000ms controlled timeout release media/slot correctly;disposed active primary media error starts1 obsolete mirror HEAD(expected0),strict assertion naturally exits1 after cleanup/retry. Shared/rejoin owner and later same-source controls pass. Proposed controller-only pre-candidate ownership guard + focused tests; await dispatch routing. No product/tests changed; active abort/browser/fallback/CPU unverified. See test_logs/TEST_LOG_2026-10-20_13-30-00_client-reliability-5.md.
+
 - 2026-10-20: item4 done/closed after normal landing89ccb907(submission7055496b,gate exit0,unstable ancestry exit0). Full427/427 files,focused22,lifecycle12,13 reverted mutants,lint11,build/artifact/native Chromium+Firefox controlled IO pass;obsolete starts1→0. Dispatch landing event sent; preview refresh owned by dispatch. No further item without routing. Actual media fallback/live peers/active abort/CPU and whole Stage3 unverified. Closure metadata/final event follow.
 
 - 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.

docs/agents/backlog/client-reliability-5.json

@@ -1,9 +1,10 @@
 {
   "id": "client-reliability-5",
   "area": "client-reliability",
-  "status": "open",
+  "status": "in-progress",
   "title": "Reproduce remaining active URL or torrent probe lifecycle defect before scoping a fix",
   "blockedOn": null,
   "addedOn": "2026-10-20",
-  "filedAt": "3f627f5df3da7bcd28d910d9f8161844fa77ff74"
+  "filedAt": "3f627f5df3da7bcd28d910d9f8161844fa77ff74",
+  "evidence": "Controller guard12f92732,mergedf2a392fa:full427/427files,focused28/lifecycle18,six reverted mutants,lint11/build/browser pass;obsolete mirrorHEAD1\u21920. Slot wait10m57s respected. Normal product queue/durable ancestry pending. See test_logs/TEST_LOG_2026-10-20_13-51-00_client-reliability-5-ready.md"
 }

js/ui/urlHealthController.js

@@ -463,6 +463,12 @@ export default class UrlHealthController {
     }
     let sawTimeout = false;
     for (const url of list) {
+      // Completed active work may still cache its result, but starting another
+      // source requires a live owner (including a card that rejoined meanwhile).
+      if (options.lifecycle && !options.lifecycle.owners.size) {
+        options.lifecycle.cancelled = true;
+        return { outcome: "cancelled" };
+      }
       let result;
       try {
         result = await this.probeUrl(url, options);

test_logs/TEST_INTEGRITY_client-reliability-5.md

@@ -0,0 +1,50 @@
+# Item5 integrity note
+
+```yaml
+test_integrity_note:
+  change_type: ["new_tests"]
+  scenarios:
+    - id: SCN-active-primary-disposed-mirror
+      given: "primary media is active, with an alternate mirror"
+      when: "the last owner disposes then primary media errors"
+      then: "no mirror HEAD starts; chain settles null without cache or stale UI, later fresh request succeeds"
+    - id: SCN-active-shared-mirror
+      given: "two registrations share active media"
+      when: "one owner disposes and primary errors"
+      then: "ordered mirror serves live owner, healthy cache avoids later requests, disposed badge stays unchanged"
+    - id: SCN-active-rejoin-mirror
+      given: "primary active media survives last-owner disposal"
+      when: "same-source live owner rejoins before primary error"
+      then: "dedup survives and ordered mirror serves new owner without duplicate primary IO"
+    - id: SCN-active-later-mirror-disposal
+      given: "first mirror media is active and another mirror exists"
+      when: "last owner disposes then first mirror errors"
+      then: "next mirror HEAD does not start, cancellation settles without cache or stale UI"
+    - id: SCN-active-timeout-cleanup-retry
+      given: "media is active with real configured initial and longer retry deadlines"
+      when: "last owner disposes and controlled clock reaches initial timeout"
+      then: "slot/source clear, no new retry resources or cache, later fresh request is healthy"
+    - id: SCN-completed-active-final-error-cache
+      given: "active primary has no further candidate"
+      when: "last owner disposes then media errors"
+      then: "completed active failure keeps existing offline cache result without stale UI"
+  observable_outcomes:
+    - "fetch/media starts, source cleanup, slot release, promise settlement and actual cache/inflight records"
+    - "live/disposed connected badge state and ordered mirror requests"
+  determinism_controls:
+    - "Real observer/controller/cache with controlled IntersectionObserver, jsdom native media event APIs and stubbed external fetch/media IO"
+    - "node:test mock clock advances configured4000ms timeout; no sleeps, retries, public network or forced exit"
+  anti_cheat_rationale:
+    prevents:
+      - "returning cancelled for live shared/rejoining owners"
+      - "guarding only first mirror or discarding completed active results"
+      - "caching cancellation as offline or starting obsolete retry resources"
+      - "over-mocking queue/controller instead of service boundaries"
+  relaxation:
+    did_relax_any_assertion: false
+    if_true_explain_spec_basis: ""
+```
+
+Existing assertions unchanged; six new scenarios (18 total lifecycle scenarios). Baseline before guard naturally exits1 with new primary/later-mirror failures (16pass/2fail/0cancelled). Fixed18pass/0fail/0cancelled. Unique note avoids shared integrity-file writes during parallel trial.
+
+`python3 /tmp/item5-mutants.py`: six deliberately broken variants each naturally exit1 with named assertion failures,0 cancelled, restored in finally before gates. Missing candidate guard kills primary/later-mirror scenarios; cancelling live mirrors kills shared+rejoin controls; checking only first mirror kills later-mirror case; caching cancellation kills null/cache expectations; discarding final active errors kills existing-offline-cache scenario; removing both media no-owner checks kills timeout cleanup/retry. Results `/tmp/item5-mutants.json` and `/tmp/item5-mutant-*.log`. No gate/test-registration changes or timed-out mutants counted.

test_logs/TEST_LOG_2026-10-20_13-30-00_client-reliability-5.md

@@ -0,0 +1,28 @@
+# client-reliability-5 active URL investigation
+
+## Scope and source
+
+- HEAD `0c1dd7e86be3e28edc96aca47f7753a98990dde0`; compared filedAt `3f627f5df3da7bcd28d910d9f8161844fa77ff74`: no observer/controller product differences. Claimed item5 after merge/read updated routing; no product or regression changes.
+- Scratch `/tmp/bitvid-client-reliability-5-active-url.mjs`, SHA256 `31c7fa62c306b28008ee663fc69d25834904ee38cbf34711230ff0d3cdc66fd7`.
+- Real attachUrlHealthBadges/cardObserver/controller/probeUrlList/probeUrl/media wait queue and actual state/cache functions. Callback shape matches VideoListView and feedCoordinator. jsdom/native DOM event APIs; only external fetch responses and media load/pause are controlled. Deferred fetch records and explicit loadeddata/error events; node:test mock clock advances the real configured4000ms deadline. No sleeps/retries/live network/forced exit. Mock timers reset and DOM closed before failing assertion. Real media decoding/resources are virtualized; counts describe IO boundary retention, not CPU/RSS.
+- First mailbox_read hit automatic approval-review deadline, not rejection; one allowed retry succeeded. Pickup reported to dispatch; no bypass/control change.
+
+## Commands and observations
+
+All commands use `env -u NODE_TEST_CONTEXT node /tmp/bitvid-client-reliability-5-active-url.mjs <mode>`. Each uses one event/source, optional mirror and actual in-flight deduplication. Initial primary HEAD is explicitly resolved to create one active media probe before disposal. Disposed DOM stays connected to expose stale UI. Before/after disposal: HEAD starts1, media resource1, active slot1, queued0, settled0, no cache. Observer disconnect confirmed.
+
+- `success`: natural exit0. Explicit loadeddata after disposal releases resource/slot to0, settles1, stores healthy once; old connected badge remains checking. Later same-source registration uses healthy cache, adds0 HEAD requests and paints healthy. This is intentional bounded active caching, not a demonstrated leak.
+- `timeout`: natural exit0. Advancing real4000ms media deadline with mock clock releases resource/slot to0, settles1, no health cache or additional media. Existing longer retry option is configured via actual cache constants, but no-owner lifecycle prevents another media start. Later same source starts1 fresh HEAD/media and paints healthy; final settled2, one healthy store from retry only.
+- `mirror-disposed --expect-no-obsolete-head`: natural exit1 AFTER cleanup/retry, AssertionError `1 !== 0` at line50, message `disposed last-owner active failure must not start a fresh mirror HEAD`. Primary media error after disposal starts mirror HEAD2: obsolete new HEAD count1(expected0), unresolved HEAD1, media resource0, active slot0, queued0, unsettled original promise. Resolving that controlled mirror HEAD eventually settles original null with no cache and no new media/stale badge. Later retry starts1 fresh primary HEAD/media, healthy cache/badge, all media/slots0; final settled2.
+- `mirror-shared`: natural exit0. A second live registration requests same event/source before original disposal: still1 initial HEAD and1 in-flight promise. Primary error starts one ordered mirror HEAD; resolving it starts one mirror media and loadeddata settles healthy for live badge; disposed badge stays checking. Final initial-chain media/slots0, settled1, healthy cache, later retry adds0 HEAD.
+- `mirror-rejoin`: natural exit0. Same as shared control, but the second same-source registration arrives AFTER original disposal while its primary media remains active. It deduplicates onto original promise, restores live ownership, and mirror success paints healthy; no duplicated primary request, stale badge or retained media/slot after completion.
+
+## Smallest reproduced defect and proposed routing
+
+Active primary media failure after the LAST owner is disposed starts a NEW mirror HEAD request. This is additional obsolete work and promise retention, distinct from allowing an already-active bounded probe to settle/cache. `probeUrlList` moves from a completed error result to the next candidate without checking live ownership; the media-stage guard is later, after that mirror HEAD has started.
+
+Proposed scope: `js/ui/urlHealthController.js` lifecycle check BEFORE starting a subsequent candidate, focused URL lifecycle regression scenarios, Test Integrity Note and evidence. Existing observer token/unregister hook is sufficient. No active HEAD/media/HLS/torrent abort, shared observer/app/cache-module edits, TTL/limit changes or broad Stage3 work proposed.
+
+Acceptance:0 new mirror HEAD starts after last-owner active error; cancelled chain settles without negative cache/stale effects; active healthy caching remains; shared live/rejoining owner still gets ordered mirror success; timeout and later same-source requests retain slot/cache/inflight safety. Preserve existing mirror fallthrough for live owners.
+
+Unverified: active HEAD/HLS/torrent teardown, real media decoding/network/browser fallback/live peers, CPU/RSS and whole Stage3. No browser/full-suite/lint/build reruns for evidence-only investigation; prior item4 qualification not repeated. Preview3000 untouched. Await dispatch independent assessment and routing before product/tests.

test_logs/TEST_LOG_2026-10-20_13-36-00_client-reliability-5.md

@@ -0,0 +1,10 @@
+# Item5 precommit evidence
+
+- `env -u NODE_TEST_CONTEXT node tests/url-health-lifecycle.test.mjs` before guard: natural exit1,16pass/2fail/0cancelled, disposed active primary and later-mirror cases fail. After guard and formatting: natural exit0,18/18,0 failed/cancelled/skipped (`/tmp/item5-lifecycle-final.log`).
+- `python3 /tmp/item5-mutants.py`: six/six reverted variants naturally exit1 with named assertion failures,0 cancelled; no timeouts or survivors. Unique integrity mapping test_logs/TEST_INTEGRITY_client-reliability-5.md.
+- `env -u NODE_TEST_CONTEXT node scripts/run-unit-tests.mjs url-health health-disposal`: natural exit0,4 files/28 scenarios (lifecycle18,controller4,multisource4,view lifecycle2). `/tmp/item5-focused.log`.
+- `env -u NODE_TEST_CONTEXT npm run lint` with approved git subprocess access: exit0,11 stages (`/tmp/item5-lint.log`).
+- `env -u NODE_TEST_CONTEXT npm run build`: exit0 including artifact verification (`/tmp/item5-build.log`). No dependency/runner/gate changes.
+- First mailbox_read tool review hit its deadline; accumulated visible tool waits at least57s, exact approval wall duration not separately instrumented. It was a tool/approval stall, not product failure or rejection. One permitted retry succeeded; pickup mailbox sent13:27:49 UTC.
+- Full-suite/browser slots requested13:32:54 UTC. Dispatch queued local full slot behind administrative drain and reserves initial browser to QA; no full/browser launches made. Full-slot wait duration will be measured through grant, not inferred from silence.
+- Current code/tests based on0c1dd7e8 plus notes-only140618f8; final verified unstable merge, full/browser grants/checks, unchanged normal landing/durable ancestry remain. Active abort,real decoding/playback/live peers/CPU and whole Stage3 unverified.

test_logs/TEST_LOG_2026-10-20_13-51-00_client-reliability-5-ready.md

@@ -0,0 +1,11 @@
+# Item5 ready on merged f2a392fa3b969a66cdaca2ee5e8877c72658bcdf
+
+- Product12f927321fdd0a945f3bdcfb3a618ef16b54ff7c; non-destructive merge of verified unstableb922c186 printedf2a392fa. Tree clean through checks; product/controller diff remains6lines.
+- Resource request13:32:54UTC; dispatch explicit exclusive full→browser→product-landing grant13:43:51.426UTC:10m57s waiting. Merge completed13:44:06,check-start event13:44:28. Full pass/browser-start event13:50:44,browser done by13:50:49. No full/browser launched before grant. Initial pickup13:27:49; approval-review deadline stall is tooling, not product failure/rejection (see precommit note).
+- `env -u NODE_TEST_CONTEXT UNIT_TEST_TIMEOUT_MS=60000 npm test`: natural exit0,427/427 files,0 quarantined; log `/tmp/item5-full-merged.log`. No aggregate scenario count exposed by runner.
+- `env -u NODE_TEST_CONTEXT npm run lint` with approved git subprocess access: exit0,11stages (`/tmp/item5-lint-merged.log`).
+- `env -u NODE_TEST_CONTEXT npm run build`: exit0 including artifact verification (`/tmp/item5-build-merged.log`).
+- Relevant focused4files/28scenarios pass,including18 lifecycle; six new scenarios baseline16pass/2fail→fixed18pass/0fail/0cancelled; six restored mutants naturally exit1 with named failures/0cancelled. Unique integrity note `test_logs/TEST_INTEGRITY_client-reliability-5.md`.
+- `env -u NODE_TEST_CONTEXT node /tmp/item5-browser.mjs` with approved private loopback/browser access: exit0, Chromium+Firefox built-dist/native IntersectionObserver, external media/fetch IO virtualized. Each obsolete mirror HEAD0 vs baseline1; cancelled result null/no cache/old connected badge checking; later same-source retry healthy; shared/rejoin controls each one ordered mirror with live healthy/old checking and resource/slot0; hidden reveal works; external requests0/pageerrors0. Browser cache is a twin, unit uses actual cache module. Owned server/browser closed and preview3000 untouched.
+- Browser released after smoke,exclusive expensive slot retained through normal product landing as granted. Next normal CLI submit clears NODE_TEST_CONTEXT without changing gate/runner/assertions; durable landing/unstable ancestry/close/final events remain.
+- Out of scope/unverified: active HEAD/media/HLS/torrent abort, actual media decoding/playback fallback/live peers,CPU-RSS/full Stage3,production/signers/wallet/deploy.

tests/url-health-lifecycle.test.mjs

@@ -436,3 +436,144 @@ test("shared inflight ownership also survives a second controller using the same
   assert.equal(badge.dataset.urlHealthState, "healthy");
   assert.equal(f.heads.length, 4);
 });
+
+test("active primary error after last-owner disposal starts no mirror HEAD and permits a fresh request", async (t) => {
+  const f = fixture(t),
+    v = f.video("disposed-active-mirror");
+  v.sources = [{ url: "https://mirror.invalid/obsolete.mp4" }];
+  const old = f.feed([v]);
+  old.observer.show();
+  await flush();
+  assert.equal(f.heads.length, 1);
+  assert.equal(f.media.length, 1);
+  old.dispose();
+  f.done(f.media[0], "error");
+  await flush();
+  assert.equal(
+    f.heads.length,
+    1,
+    "disposed chain must not start a mirror HEAD"
+  );
+  assert.equal(await f.promises[0], null);
+  assert.equal(cache.getCachedUrlHealth(v.id, v.url), null);
+  assert.equal(f.controller.activeVideoProbes, 0);
+  assert.equal(f.media[0].getAttribute("src"), null);
+  assert.equal(old.badges[0].dataset.urlHealthState, "checking");
+  const fresh = f.feed([v]);
+  fresh.observer.show();
+  await flush();
+  assert.equal(f.heads.length, 2);
+  assert.equal(f.media.length, 2);
+  f.done(f.media[1]);
+  await flush();
+  assert.equal(fresh.badges[0].dataset.urlHealthState, "healthy");
+  assert.equal(cache.getCachedUrlHealth(v.id, v.url).status, "healthy");
+});
+
+for (const timing of ["shared", "rejoin"]) {
+  test(`active primary error preserves ordered mirror for a ${timing} live owner`, async (t) => {
+    const f = fixture(t),
+      v = f.video(`active-${timing}`);
+    v.sources = [
+      { url: "https://mirror.invalid/live-first.mp4" },
+      { url: "https://mirror.invalid/unused-second.mp4" }
+    ];
+    const old = f.feed([v]);
+    old.observer.show();
+    await flush();
+    if (timing === "rejoin") old.dispose();
+    const live = f.feed([v]);
+    live.observer.show();
+    await flush();
+    if (timing === "shared") old.dispose();
+    assert.equal(f.heads.length, 1);
+    assert.equal(f.promises.length, 1);
+    f.done(f.media[0], "error");
+    await flush();
+    assert.equal(f.heads.length, 2);
+    assert.equal(f.heads[1].source, v.sources[0].url);
+    assert.equal(f.media.length, 2);
+    f.done(f.media[1]);
+    await flush();
+    assert.equal(f.heads.length, 2, "healthy first mirror must stop fallback");
+    assert.equal(live.badges[0].dataset.urlHealthState, "healthy");
+    assert.equal(old.badges[0].dataset.urlHealthState, "checking");
+    assert.equal(f.controller.activeVideoProbes, 0);
+    const cached = f.feed([v]);
+    cached.observer.show();
+    await flush();
+    assert.equal(f.heads.length, 2);
+    assert.equal(cached.badges[0].dataset.urlHealthState, "healthy");
+  });
+}
+
+test("active first mirror error after disposal does not start the next mirror", async (t) => {
+  const f = fixture(t),
+    v = f.video("later-mirror");
+  v.sources = [
+    { url: "https://mirror.invalid/first.mp4" },
+    { url: "https://mirror.invalid/obsolete-second.mp4" }
+  ];
+  const old = f.feed([v]);
+  old.observer.show();
+  await flush();
+  f.done(f.media[0], "error");
+  await flush();
+  assert.equal(f.heads.length, 2);
+  old.dispose();
+  f.done(f.media[1], "error");
+  await flush();
+  assert.equal(f.heads.length, 2);
+  assert.equal(f.media.length, 2);
+  assert.equal(await f.promises[0], null);
+  assert.equal(cache.getCachedUrlHealth(v.id, v.url), null);
+  assert.equal(f.controller.activeVideoProbes, 0);
+  assert.equal(old.badges[0].dataset.urlHealthState, "checking");
+});
+
+test("disposed active media timeout releases its slot without retry resources and later requests remain playable", async (t) => {
+  const f = fixture(t),
+    v = f.video("active-timeout");
+  f.controller.constants = {
+    URL_PROBE_TIMEOUT_MS: cache.URL_PROBE_TIMEOUT_MS,
+    urlHealthConstants: cache.urlHealthConstants
+  };
+  t.mock.timers.enable({ apis: ["setTimeout"] });
+  const old = f.feed([v]);
+  old.observer.show();
+  await flush();
+  old.dispose();
+  t.mock.timers.tick(cache.URL_PROBE_TIMEOUT_MS);
+  await flush();
+  assert.equal(f.heads.length, 1);
+  assert.equal(f.media.length, 1);
+  assert.equal(f.controller.activeVideoProbes, 0);
+  assert.equal(f.media[0].getAttribute("src"), null);
+  assert.equal(await f.promises[0], null);
+  assert.equal(cache.getCachedUrlHealth(v.id, v.url), null);
+  assert.equal(old.badges[0].dataset.urlHealthState, "checking");
+  const fresh = f.feed([v]);
+  fresh.observer.show();
+  await flush();
+  assert.equal(f.heads.length, 2);
+  assert.equal(f.media.length, 2);
+  f.done(f.media[1]);
+  await flush();
+  assert.equal(fresh.badges[0].dataset.urlHealthState, "healthy");
+  assert.equal(f.controller.activeVideoProbes, 0);
+});
+
+test("completed active failure without another candidate preserves its existing offline cache result", async (t) => {
+  const f = fixture(t),
+    v = f.video("final-active-failure"),
+    old = f.feed([v]);
+  old.observer.show();
+  await flush();
+  old.dispose();
+  f.done(f.media[0], "error");
+  await flush();
+  assert.equal(f.heads.length, 1);
+  assert.equal(f.controller.activeVideoProbes, 0);
+  assert.equal(cache.getCachedUrlHealth(v.id, v.url).status, "offline");
+  assert.equal(old.badges[0].dataset.urlHealthState, "checking");
+});

todo/TODO_2026-10-20_13-30-00_client-reliability-5.md

@@ -0,0 +1,8 @@
+# client-reliability-5
+
+- [x] Merge rules/brief,check filedAt,claim.
+- [x] Actual observer/controller/cache active success/timeout resource measurements.
+- [x] Reproduce obsolete mirror HEAD1(expected0),assertion after cleanup naturally exits1.
+- [x] Shared owner,rejoin and later same-source controls naturally exit0.
+- [x] Report smallest scope/acceptance to dispatch.
+- [ ] Dispatch independent assessment/routing before product/regression changes.

todo/TODO_2026-10-20_13-36-00_client-reliability-5.md

@@ -0,0 +1,7 @@
+# Item5
+
+- [x] Reproduce/independent route.
+- [x] Controller-only guard/six scenarios and six rejected mutants.
+- [ ] Focused/lint/build results and committed merged-tree checks.
+- [ ] Explicit full-suite slot and browser slot/QA coverage.
+- [ ] Normal clean-env queue,durable status/ancestry/close/dispatch events.

todo/TODO_2026-10-20_13-51-00_client-reliability-5-ready.md

@@ -0,0 +1,7 @@
+# Item5
+
+- [x] Controller pre-candidate guard,six new regressions/six restored mutants.
+- [x] Focused28,lifecycle18,full427files,lint11,build/artifact,native Chromium+Firefox controlled smoke.
+- [x] Respect/measured full/browser wait10m57s;browser released.
+- [ ] Normal clean-env product queue,durable landed status/unstable ancestry.
+- [ ] Close metadata,dispatch landing/final/slot-release.