fix(pm): the half-state patrol reads a seat post's NEWEST comment page, and H44 knows the current marker spelling - #18322

Contract review

Served-tier: CONTRACT_REVIEW_TIER
Head-sha: d625971c1160add8f38265c0e6c490c2af088e11

Reviewing seat: domain:skills, in-seat review at the contract-review tier — get_session read at 2026-09-15T07:15Z: configured_model = session_context.model = last_served_model, the constant's tier, no fallback notice this round. Card #18312, claim 5684219721, report 5684847182 (posted through the tool; read back footer-appended); Clause-②: no on the claim; default-tier build, seat review at tier.

① Derived judgments

• Accept set / public surface: none moves — scripts/pm/check-half-states.mjs (+388/−56, the only file; the head is a merge of origin/main 863c7c44 whose four spec-liveness files are outside this PR's diff; the patrol file's blob b4268071 is identical on both heads) against merge-base 863c7c44; nothing published; skip-changeset read back. Non-governed ⇒ in-seat landing.
• The change, read in full on a detached worktree of the first head (blob-identical): design (b) — ONE shared memo seatPostRowsFor declares which page is a seat post's window (the LAST page, located from the carrier's own comments count through H65's two exported helpers); H44's seat leg takes it and lands it in commentCache before the judging loop, so H56 and H64 inherit it by construction; H65 consumes the same memo at the foot instead of a second purchase; a single-page thread reuses the rows already in hand; an unlocatable count falls back to page 1 and is counted separately (readingSeatNewest); a multi-page seat post is marked an INCOMPLETE walk so H52 stays unjudged. H44 recognises the current marker spelling through H65's declared shapes filtered to ROUND_OPEN_ARTEFACT_KIND (headline-only, H65's false-positive control), its owned regex kept body-wide and unchanged; seatWindowAudit reads the file's own source and pins ONE page-less comment read (the card window), ONE purchase site, two readers. The seat took the pure readings on the head: the two live markers 5682407231 / 5681229485 → h44IsRoundOpenMarker true, shape 「a round-open marker」 (the owned regex still false on both; origin/main exports no such predicate); the audit reads 1 / 1 / 2 / 4. Self-test 4196 / main → 4235 / head (+39; one H65 case rewritten because its pinned phrase 「never cached」 became false — split into two pins on the new statement); ESLint 0/0; check-self-test-wired OK; --pair 18322 0; the battery 1730 pass on the seat's detached run (exit 0).
• Gates 41 / 41 / 0 / 0 by --ran on the merge head (the union and the battery run twice, 453.5 s / 460.0 s). Reverse verification by the dev: three ablation legs from the committed state with blob hashes (the located page back to page-less → 3 red by name; the seat leg back to the card window → 1 red; the headline leg disabled → 3 red = the base tree's reading; restored, git diff HEAD empty; one non-unique anchor refused and re-anchored rather than retried blind); the live patrol before/after (base 10a7b9fa vs 09026edf, both exit 0): three H44 rows on multi-page HELD seat posts moved from August artefacts to September ones ([PM seat] domain:services — 🟢 held by session_01F3AM5NxtQbfV8pddEkXJ7o · seated 2026-09-15T23:18Z · predecessor session_01URLHobLUJB9K1ABV6ofdjj closed out on harness STALE #6021, [PM seat] domain:devx @ objectstack — 🟢 os-project-manager · session_017ef78bLdybu3AffehKkhfk · R1 wave 2 · 继承落地债 4/4 已清 · PR #18162 #18165 已入队 · 2 在飞(#17330 #17739)· 1 等人工合 #18096 · 新立 3 卡 #6023, [PM seat] domain:engine — 🟢 os-musk · session_01RuoNSXUbBoWHkNS4AknTrM · R2 · 31 landed · 1 in flight · 1 → 决策箱 #6367), the two single-page posts byte-identical, row counts unchanged (H44 26 / H56 6 / H64 10 / H65 1), the corpus SMALLER (1184 → 958 comments — a tail page is shorter than a full first page, the trade the card bought) and the clause now says which window it is.

② Semver level

Not applicable — nothing published moves; skip-changeset measured.

③ Boundary flags

open_questions: none. One seat premise refuted, owned here: 「H44's seat leg reaches the triage post」 — true as a header claim, false live: the leg's gate needs seatIsHeld, which excludes a 🟢 Routine or vacant seat, and #6015 read 🔴 空缺 during both live runs, so the before/after on the triage post itself could not be taken — filed below. Four deviations answered: origin/main merged in (never rebased) with the union and the battery re-run on the merge commit — accepted; the PR body not re-sent after the merge (every number unchanged) — accepted; the live before/after taken on the three multi-page held seat posts rather than #6015 — accepted, stated; one H65 case rewritten, not deleted — accepted. Out of scope, FILED by the seat as three cards: (1) H44_READING_TIMESTAMP rejects a minute-precision ISO stamp because the preceding T is a word character (the ruled spelling itself reads false); (2) H44's seat-leg population excludes a Routine / vacant triage seat, so the window fix is inert on #6015 until a session holds it; (3) H32 / H38 still read the seat post's OLDEST page for the idle clock and T_seat. Noted, not filed: an artefact between the first and the last page is read by neither window — visible in the clause every run. Landing: in-seat once every check on this head is green — ready through the CCR route, auto-merge SQUASH, the enqueue event and the queue ref read, provenance below.

Implemented-by: claude/issue-18312-h44-seat-leg-newest-page
Reviewed-by: session_01HZfg2AwVX191qCizp88gQr

VERDICT: PASS

Generated by Claude Code

Landing provenance — skills seat, session session_01HZfg2AwVX191qCizp88gQr, 2026-09-15T17:35Z. Non-governed landing (scripts/pm/check-half-states.mjs only): review of record 5684896900 PASS on head d625971c1160add8f38265c0e6c490c2af088e11, ACCEPT 5684897383 on #18312; every check on that head read green at 2026-09-15T17:34Z (25 success / 8 skipped / running none / failed none; combined status success). The seat flipped the PR ready through POST …/pulls/18322/ccr/ready_for_review and armed auto-merge SQUASH through PUT …/pulls/18322/ccr/auto_merge; the ready_for_review event reads 2026-09-15T17:34Z and the added_to_merge_queue event one second later, both by claude[bot]; the queue ref refs/heads/gh-readonly-queue/main/pr-18322-82b3032c… read 1 twenty-three seconds after the enqueue (a lone entry, chained on 82b3032c). Landing is confirmed by the three readings (merged_at + git log origin/main carrying (#18322) single-parent + the queue ref gone) at the next wake; then #18312's residue is stripped and the landing record posted; #18323 / #18324 / #18325 (same file) stay serial behind this PR until then.

Generated by Claude Code