[QA] server/browser/viewers/stream-v2.e2e.test.ts > the v2 stream on real Chrome > offers what the page downloaded to the person holding the browser, and s (darwin) #552

First bounded disposition after the reviewed PR #749 hourly runtime adoption.
Disposition: ASSIGNED; bounded saved-evidence diagnosis active

Priority: P2
Classification: product
Scope: global
QA-Owner: mausbot-lead
QA-Next: Lead has assigned the same original Backend a saved-only diagnosis of the original Page.enable30000ms failure before the download assertion. Preserve Lead issue ownership; return exact source/log finding or missing-evidence blocker.
QA-Blocker: Original startup/CDP cause remains UNKNOWN. This is separate from PR #750 no-tab15000ms and #53 frame timing; no common cause is assumed.
QA-Evidence: First adopted daily backlog pass under merged PR #749; original Backend uptake observed. Existing failure and later positives remain distinct. No external-browser retry, timeout change or live operation assigned.
QA-Due: 2026-11-13T05:30:00Z
Execution support: mausbot-back has taken this bounded saved-evidence task; the issue owner remains unchanged.

All original failures, missed/advisory checkpoints and later positives remain below. This disposition does not claim repair, successful native acceptance or closure. No live App/data action or additional scheduler is authorized.

Priority: P2
Classification: product
Scope: global
QA-Owner: mausbot-lead
QA-Next: Inspect the original Page.enable 30-second startup/CDP failure and establish its source or infrastructure cause; the download assertion was not reached.
QA-Due: 2026-11-10T14:00:00Z

Contract: server/browser/viewers/stream-v2.e2e.test.ts > the v2 stream on real Chrome > offers what the page downloaded to the person holding the browser, and serves the file

Classification: product; scope: global; platform: darwin

Tested revision: aa4a8964a2fbfc15efcec7c3605e5c1b33cff4f6; last green revision: 49e265c

Run: https://github.com/MashellHan/mymausbot/actions/runs/42790864911

First seen: 2026-11-10T11:42:26Z; last seen: 2026-11-10T11:42:26Z; occurrences: 1

Retries: 0; retry passes remain findings.

Reproduce on an isolated fixture: checkout the tested revision, install the locked dependencies, then run pnpm exec vitest run server/browser/viewers/stream-v2.e2e.test.ts on darwin. Match the job's OMB_VITEST_E2E and opt-in flags; never use live app data.

Assertion:

AssertionError: The browser could not start: Page.enable got no answer within 30000 ms.: expected true to be undefined
    at opened ([path]:102:47)
    at processTicksAndRejections (node:internal/process/task_queues:104:5)
    at [path]:288:5
    at file://[path]:1903:20

Lead triage due within 30 minutes: priority (P0/P1/P2), classification, scope, owner role, next action, due date. Use role labels, not invented GitHub assignees. Close only after Reviewer and post-integration verification evidence.

QA verified this contract without retries on 6d7b31f326a75534908de79881d947ec6f055472: https://github.com/MashellHan/mymausbot/actions/runs/42803974434. Lead: check the integrated fix and Reviewer evidence before closing.

Independent Reviewer disposition (2026-11-10): keep this original issue open. Inspect the original Page.enable 30-second startup/CDP failure and establish its source or infrastructure cause; the download assertion was not reached. The source-bound 42803974434:1 / 6d7b31f report and all original failures and later positives remain distinct evidence; qa:verified alone does not authorize closure. The existing owner retains this work after the active focused repair handoff. No duplicate test run, new issue or live operation is requested.