[jrusso1020]

Problem

#7378 made __player.seek() asynchronous: it resolves once the preview picture is ready. seam-gate.mjs seeks and reads in the same tick, so every sample measures t=0. On a correct film, each seam fails the same way, with exit-visible op 0.00 and exit-moving 0 px/s, and probe finds no movers at all.

Found while building this week's changelog video (#7453). The committed gate reported 24 FAILs across 6 seams on a film whose frames are fine.

Changes

• The page-side seek / sample / scan helpers are now async and await the seek. The three evalJs calls that use them pass awaitPromise, which evalJs already supports.
• references/seam-gate.md gets a short note on the false-failure signature, so the next person recognizes it.
• Both mirrors (.claude/ and .agents/) are updated identically.

Verification

• On the Nov 2-9 changelog project, the committed gate reported 24 FAIL across 6 seams. This version reported 6/6 PASS with 0 warnings against the repo-local preview, on the same film.
• In headless Chrome, a seek that isn't awaited leaves the timeline at 0, and an awaited seek lands at the requested time.
• node --check passes and check-skill-mirror reports 24 files matching byte-for-byte.

— Rames

🤖 Generated with Claude Code

[heygengenesis]

Verdict: COMMENT · 0 blocker · 0 important · 1 nit
The fix itself is correct and ready to merge. I'm holding the approval only because CI on dfd2f84 is red, and that red isn't caused by this PR (see details).

• nit: changelog-video/SKILL.md:158 and references/build-spec.md:122 (both mirrors) still say to spot-check "via __player.seek(t)". An agent that seeks and reads in one Runtime.evaluate will hit the same t=0 read. Saying "await __player.seek(t)" there would close that gap.

Scope / CI

• I read all of seam-gate.mjs. All 4 __seamGate.sample/scan call sites now pass awaitPromise, and nothing else calls __seamGate.seek or __player.seek. Since #7378, __player.seek returns Promise<void> | void (HeldSeek, previewSeek.ts:340), and awaiting it works for both. evalJs already sets a 60 s CDP timeout, so a seek that never resolves fails loudly instead of hanging. node --check passes, and the two mirrors are byte-identical.
• CI: the CI, preview-regression, Player perf, PR captures and Comments runs all failed with no failing job or step (every listed job is green or skipped). Since about 18:12Z every PR CI run has failed the same way, including the unrelated renovate/terraform-monorepo. That points to a repo-wide problem, not this diff. Re-run once it's fixed. CodeQL was still running when I posted.

— Genesis

[heygengenesis]

Verdict: COMMENT · 1 resolved, 0 open, 0 new · dfd2f84 → b8a354e. The code is ready; I'll approve once Actions shows CI green on this head.

CI on b8a354e

The CI, regression, preview-regression, Player perf and PR captures runs all concluded failure with no failing job. The required jobs Typecheck, Build, Test and regression were never created: CI shows only 7 jobs, all green, and regression shows only Detect changes. CI on main push has also failed this way since 18:11Z, so the cause is repo-wide, not this diff. mergeStateStatus is BLOCKED.

— Genesis

[heygengenesis]

Verdict: APPROVE · 1 resolved, 0 open, 0 new · b8a354e (head unchanged). All 8 Actions runs on this head are now green, including the re-run CI (with Test, Test: skills, Format) and regression. Change detection skipped the package jobs because this is a skills-only diff.

— Genesis