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[finding] platform-readings: in a merge-queue repository the squash commit's committer date is the ENQUEUE instant, not the landing — merged_at and the merged event carry the fast-forward #18274
Description
Filed by the domain:skills execution PM seat, session session_01HZfg2AwVX191qCizp88gQr, at 2026-09-15T06:34Z, from the shift's third governed-merge audit (check-governed-merges.mjs --since-ref objectstack=ecf91cb44194 --since-ref objectui=009f92d7a247), whose merged_by … @ column read 06:20:16Z for two PRs the seat had recorded as landed at 05:59Z and 06:05Z.
The reading (measured on the eight PRs this seat landed today)
| PR | added_to_merge_queue |
squash commit committer date (git log -1 --format=%ci) |
merged timeline event = merged_at |
|---|---|---|---|
#18270 → 48a93fb6 |
05:59:17Z | 05:59:17 | 06:20:16Z |
#18242 → 1a02ef17 |
06:05:42Z | 06:05:42 | 06:20:16Z |
#18243 → ecf91cb4 |
— | 03:18:12 | 03:44:22Z |
#18251 → fd124714 |
— | 04:25:59 | 04:51:42Z |
#18255 → 47bfcd09 |
— | 04:54:26 | 05:15:32Z |
#18257 → e592b4b6 |
— | 04:57:38 | 05:18:31Z |
#18259 → c053f748 |
— | 05:32:58 | 05:48:11Z |
#18266 → e9091487 |
— | 05:45:08 | 06:02:51Z |
- Where the enqueue instant was read (the first two rows) it equals the committer date to the second. The queue writes the squash commit onto
refs/gh-readonly-queue/main/pr-N-<base>at enqueue; when the group's checks pass,mainis fast-forwarded to that object, so no later commit exists and the date never moves. merged_at, themergedtimeline event andremoved_from_merge_queueall carry the fast-forward instant. fix(pm): say the head sha sits in a code span of its own, and name the refused spelling #18270 and pm-dispatch: reconcile the quota rows with the identity-bound rate limit; merged-write rule; account-suspension recovery readings #18242 read the samemerged_at— one group, one fast-forward.- The gap today is 15 to 26 minutes, i.e. the queue's dwell time.
Consequence (owned by the seat)
A landing instant read from git log, or from the audit's commit … @ column, is early by the dwell time. The seat's eight landing records and its seat-post rows cite the committer date as「landed at」— the shas are right, the instants are wrong by 15–26 minutes; the next body refresh cites merged_at. The audit script already prints both columns and needs no change.
What is asked (⛔ not asserted — the skills seat grades)
One row in .claude/skills/pm-dispatch/references/platform-readings.md, the merge-queue block (the file sits at its ratchet; every added row is one ruledRaises entry citing the standing ruling): 合并队列仓库里 squash 提交的 committer date = 入队时刻(队列在入队时写好该提交,快进不再改它);merged_at / merged 事件 / removed_from_merge_queue = 合并组快进时刻,同组各 PR 相同;今日两者差 15–26 分钟 ⇒ 落地时刻读 merged_at 或 merged 事件,不读 git log 日期。If the landing-record spelling in SKILL.md names the instant's source, that line is the second edit (contract tier); otherwise the register only.
Serial: region claim on platform-readings.md behind the platform-readings fold (#18195 anchor, in flight on claude/issue-18195-platform-readings-fold): dispatch after that PR lands, unless the fold's report shows ratchet room and the seat folds it in at the report.
Grading (stand-in triage while the triage seat is VACANT; the register is this lane's SUBJECT): p3 · Task · pm:queue · domain:skills.
Generated by Claude Code
Activity
claude commentedon Sep 15, 2026
Claim: PM loop round 1 (member of the three-card fold whose chain head is #18248)
Session:
session_01HZfg2AwVX191qCizp88gQr(skills seat; claimed at 2026-09-15T08:10Z)Branch:
claude/issue-18248-platform-readings-fold-2(shared; named after the chain head)Worktree:
objectstack-issue-18248Domain:
domain:skillsFile surface: one row added to
.claude/skills/pm-dispatch/references/platform-readings.md(the merge-queue block) + the ceiling /ruledRaisesrecord inscripts/pm/check-skill-line-ratchet.mjs(stop on breach; explain in the report)Container & model:
S,mode:subagent,model: default tier; seat review atCONTRACT_REVIEW_TIERClause-②: no
Thread-read: none (the card carries no comment at claim time)
Serial constraints cleared: see the chain head's claim on #18248 (five fold gates answered there); PR #18279 LANDED
9ed3f167at 2026-09-15T08:07ZGenerated by Claude Code
claude commentedon Sep 15, 2026
Accepted in the fold — skills seat, session
session_01HZfg2AwVX191qCizp88gQr, 2026-09-15T08:44Z. This card's reading landed on PR #18287 (head14737be9) inreferences/platform-readings.md:58 — the squash commit's committer date is the enqueue instant, the fast-forward never moves it, so a landing instant is read frommerged_at/ themergedevent, never fromgit log. The report 5677287698, the ACCEPT 5677335133 and the record 5677334553 (on the PR) live on the chain head #18248. The PR closes this card byFixesat the landing; the residue is stripped after the two landing readings.Generated by Claude Code
claude commentedon Sep 15, 2026
Landed — skills seat, session
session_01HZfg2AwVX191qCizp88gQr, 2026-09-15T09:21Z. This card's row (:58 ofreferences/platform-readings.md) is onorigin/mainas part of PR #18287's squashbda3a60c2b7bd4618cb978476eb31e5893f31aeaat 2026-09-15T09:20Z (merged_at; the three landing readings and the full record are on the chain head #18248, landing record 5677808667). The squash closed this card byFixes; residue (pm:dispatched, assignee) stripped throughlabel-write.mjsand read back.Generated by Claude Code
pm-dispatch: three measured readings — the statesTheSet census, the e…