docs(pm-dispatch): spec-semantic fable clause, native issue-typing + Bug-first tiebreaker, retire shift-end skill-suggestion list

[os-zhuang]

Fixes #7945
Fixes #7947
Fixes #7950

Closing consolidated skills batch — three maintainer rulings of 2026-08-12, all fully ruled, zero design freedom. ADR-class (.claude/skills/**): draft PR, human merge only — no queue, no auto-merge.

Per-member checklist

• pm-dispatch SKILL Model tiering: mandatory claude-fable-5 for spec SEMANTIC cards — accept/reject behavior or public-surface change (maintainer ruling 2026-08-12) #7945 — landed in SKILL.md § 派发 › Model tiering: the mandatory-clause block now has two clauses; new clause ② mandates claude-fable-5 for any card that alters the contract's accept/reject behavior or grows its public surface (the domain:spec semantic lane), same no-downward-discretion form as clause ①. The criterion cites the existing adjudication boundary test (§ 分诊代裁) and the one-package-three-seats split (§ Domain lanes) — no second copy written. Explicitly unchanged and stated so: spec-surface stays sonnet/opus; spec-tooling stays opus default, fable when designing a gate's semantics; downstream-adaptation stays opus default. Ruling quoted verbatim, untranslated: 「同意,就按语义面收窄,立卡并通知 spec 席」.
• pm-dispatch SKILL: native issue-typing at triage (Bug/Feature/Task) + Bug-first tiebreaker in ordinary-queue selection (maintainer ruling 2026-08-12) #7947 — landed in two places. (a) SKILL.md § 分诊座位职责: new paragraph making the triage seat the single authoritative producer of the native type field (Bug/Feature/Task; filers may pre-set, triage corrects), with the mechanical criterion citing the same boundary test (wrong behavior against the declared contract ⇒ Bug; grows the accept-set/public surface ⇒ Feature; else Task), the Bug-repro discipline (no named location or repro path ⇒ does not enter pm:queue, flagged for repro), the no-mass-backfill rule, and the three named consumers (adjudication routing with Feature mechanically on the human floor; release-board type:Bug is:open query — also wired into the release-board paragraph's defect class ①… the query itself is named in the consumers list; the selection tiebreaker). (b) SKILL.md § 候选与批次 › 选择优先级: within ordinary queue items, Bug outranks Feature/Task — stated as a tiebreaker, explicitly not a priority ladder (P1–P5 gradations tried and rejected). Ruling: 「同意」.
• pm-dispatch SKILL: retire the mandatory shift-end SKILL-suggestion list — narrow the channel to three report classes, default zero (maintainer ruling 2026-08-12) #7950 — landed in two places. (a) references/seat-post-protocol.md exit-checklist item ⑦: the mandatory tenure SKILL update-suggestion list is retired; shift-end reporting narrows to the three classes (① wrong/missing principle → skills seat via the 专题 channel; ② mechanizable item — a gate or script, never prose — → a normal card; ③ platform-fact change → one references/ fact-table row), arriving as finding-class items in the skills lane, default disposition outside the three classes = close not-planned; lessons-learned prose no longer admissible into skill texts. (b) SKILL.md § 座位贴协议: the corresponding principle line (换班报告默认零建议) with the ruling quoted verbatim: 「还有各车道下班时会提交 skills 建议有必要吗?就是那些搞得后来skills越来越乱。」. This delta is net-negative and funds the batch's line budget.

Ratchet accounting (ceiling 686, headroom 0 — ceiling untouched)

check:pm-skill-ratchet is green at exactly 686/686. All additions were offset inside the touched sections by compressing prose whose operational detail already lives, verbatim, in references/ (verified before each cut):

• 座位贴协议: six-segment enumeration, title format, liveness thresholds → seat-post-protocol.md carries them.
• 发版板: producer mapping, three-repo query, board-clearing three-way, pin precondition → seat-post-protocol.md § 发版板运维细则.
• 云卡四课 / 资源与后端: per-lesson parentheticals and the contention argument → dispatch-runbook.md (grep-verified: outcome_branch, 自驱/回合终点, 轮询负债, build+test 争用, 事件驱动 all present there).
• Model tiering: the four-step model resolution order → authoritative in the os-dev definition's frontmatter comment, now cited instead of restated.
• Plus ragged-wrap repacks with no wording change (代裁置信门, 三分区, sweep 段落).

Nothing from the three cards was dropped. No card substance is obsolete; the dropped-with-rationale list is empty.

Gates (run locally, honest readings)

• check:pm-skill-ratchet — green (686/686, self-test 5/5)
• check:pm-skill-id-lint — green (9 files clean, zero issue-ID citations in operative text; self-test 9/9)
• check:skill-frame-sync — green (4 copies isomorphic; self-test 12/12)
• check:doc-authoring — green (375 files clean; self-test green)
• check:nul-bytes — green (7283 files, no raw control bytes; plus a targeted control-char self-scan of both edited files: clean)

Docs-only: no changeset (skip-changeset applied). Branch is merged up past PR #7948's landing (AGENTS.md/CLAUDE.md — no file overlap; ratchet and id-lint re-run green on the merge result).

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Project	Deployment	Actions	Updated (UTC)
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[os-zhuang]

同意合并