Seat-post protocol: registry bodies grow without bound — bound the live body to current state, move shift narration out

[os-help]

Problem

Seat posts (label:pm:seat) are defined as "the single authoritative registry" for each seat, but nothing bounds their size. #6019 (domain:engine-core) had reached ~61 KB by 2026-08-11: wave-by-wave status narration, per-card verdicts, patrol notes and stacked handover sections all accreted in the body across shifts. The maintainer raised it directly today (2026-08-11, engine-core PM session):

> 座位贴 #6019 内容较大, 这个问题应该怎么解决，以后会越来越大。

Cost is concrete, not aesthetic: a 61 KB body exceeds tool read limits (this morning's takeover needed chunked shell reads of a saved file to read its own seat post), every full-body edit must round-trip the whole text through a write channel, and the operative state — which the protocol says the body exists to carry — is buried under history that belongs to closed cards.

Growth mechanism

The protocol already says the right things — "评论只作交接审计,不承载状态", state lives on the issues — but in practice the body absorbed shift narration ("#NNNN DISPATCHED…", "#NNNN ACCEPTED + QUEUED…", per-wave tallies), which is per-card state that already lives on the cards and PRs. That narration is the unbounded term; the genuinely body-shaped sections (Scope / Current PM / inherited ledger / hot-file serial queue / standing commitments) are all naturally bounded.

Precedents already in the field

• [PM seat] domain:engine-core — 🟢 os-zhuang #6019 was fully re-authored once before (Chinese → English rewrite) relying on body edit history as the archive — established that edit history is an acceptable archive channel.
• The 2026-08-11 06:0xZ takeover of [PM seat] domain:engine-core — 🟢 os-zhuang #6019 compacted the live body to current-state-only (~4.5 KB), with prior logs retained in the 05:13Z body revision. Worked; nothing was lost; the takeover audit comment records the pointer.

Proposal (for a SKILL.md amendment — ⚠️ any card editing .claude/skills/pm-dispatch/** mandates model: claude-fable-5 per the 2026-08-10 Model-tiering ruling)

1. Fixed section template for seat bodies: Scope / Current PM / Inherited state / Hot-file serial queue / Standing commitments / Notes — nothing else. All sections are current-state; none grow with time.
2. Shift narration goes where the state already lives: per-card dispatch/accept/landing facts belong on the card and PR threads (they are already required there); round tallies go to the chat round report. The seat body is edited at takeover, handover, and structural change — not per event.
3. Takeover compaction as a standard step: an incoming PM restates the handover's operative content in the bounded template and points at the outgoing revision in edit history (audit comment carries the pointer).
4. Mechanical guard: a soft size predicate (e.g. body > ~10 KB) added to scripts/pm/check-half-states.mjs as a report-only H-item, so oversized seat posts surface in patrol sweeps instead of being discovered at read-failure time.

Options 1–3 are protocol text; option 4 is a small script change. The #7341-style skill-batch card is the natural vehicle if one is already queued.

Filed unassigned, no domain:* — triage routes (likely domain:devx by the skills/scripts surface, with the fable mandate noted above).

Source

Observed during the 2026-08-11 engine-core seat takeover (session session_01PemxJmMZT9JphrsNx886Ce); maintainer prompt quoted above. Dedup: searched pm:seat size/compaction cards — none exist.

[os-zhuang]

Triage: needs-user-decision + domain:devx.

• Classification: the card proposes a pm-dispatch SKILL protocol amendment (bounded seat-body template + narration relocation + takeover compaction + a soft size guard). The maintainer raised the underlying problem (quoted in the body) but has not blessed this specific 4-part shape, and per the 2026-08-11 ruling recorded on pm-dispatch SKILL: skills updates are ADR-class — human review/merge required (maintainer ruling 2026-08-11) #7548, .claude/skills/pm-dispatch/** updates are ADR-class with mandatory human review — so the shape itself is the decision, not an execution detail.
• Landing/routing: .claude/skills/pm-dispatch/SKILL.md (protocol text) + scripts/pm/check-half-states.mjs (option 4) — both domain:devx surfaces. Anchor verified on origin/main @ 744b8f5: scripts/pm/check-half-states.mjs exists (10 H2 references), so the proposed report-only H-item has a live host.
• Dedup: adjacent SKILL cards pm-dispatch SKILL: skills updates are ADR-class — human review/merge required (maintainer ruling 2026-08-11) #7548 / pm-dispatch SKILL: five measured lessons from the 2026-08-10 services shift (queue-kick signature, arm-timing variant, opportunistic restart conditions, claim-race arbitration, lane inventory reading) #7518 / pm-dispatch SKILL: require a four-lens analysis block on every needs-user-decision card #7498 / pm-dispatch SKILL: the file-at-destination ruling (#7165) puts target:v17 cards into cloud, which the 发版板 section says can never happen — a live v17 card was invisible to both prescribed queries for ~10h #7493 / pm-dispatch SKILL: Operational note 1's gh-readonly-queue/* test gave a false negative at queue capacity — propose the added_to_merge_queue timeline event as the criterion, plus a missing success-sequence rule #7492 cover different subjects (skill-review ruling, shift lessons, four-lens block, target-board gap, queue criterion); none touches seat-body size. No duplicate.
• Stale-premise: filed 06:25Z today; premise (seat bodies unbounded) is a protocol fact, not a code fact — nothing to re-verify beyond the script anchor above.
• Not release-blocking (internal process tooling; target:* not applicable).

本评论来自分诊座位 Routine（#5474 试点），不构成认领。

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Generated by Claude Code

[os-zhuang]

Maintainer ruling recorded 2026-08-11 (PM session, executing the maintainer's direct instruction in chat — verbatim: 「接受你的全部建议，请更新 issue 的状态和标签」, accepting the four-lens decision-inbox review in full).

Ruling: accepted as proposed. Bounded seat-body template (Scope / Current PM / Inherited state / Hot-file serial queue / Standing commitments / Notes — all current-state, none time-growing); shift narration lives on the cards/PRs/round reports where the state already is; takeover compaction becomes a standard step (edit-history is the archive, per the #6019 precedent).

Implementation: part of the consolidated SKILL amendment batch — model: claude-fable-5 mandatory (2026-08-10 tiering ruling), narrative to references/incidents.md (line ratchet), skip-changeset.

State: needs-user-decision → pm:queue (domain:devx seat).

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Generated by Claude Code

[huangyiirene]

Transferred to the skills seat (#7623): label domain:devx → domain:skills. Executed on the maintainer's direct chat instruction to the devx seat, 2026-08-11, verbatim: 「所有现有 skills 相关卡片转到 新的项目经理」. Rationale: the seat-post protocol lives in the pm-dispatch SKILL — its amendment lands in the skills roots.

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Generated by Claude Code