queue steward: give the cross-repo pin watch a mechanical output — file-or-refresh the bump chore when a window settles (release-lane pin watch)

[hotlong]

Problem

The required freshness gate (check:objectui-pin-fresh on the Version Packages PR, #3340) prevents loss — you cannot cut a release with a stale pin — but not lateness: the red light turns on at cut time, and the bump chore still has to be filed and driven by hand at that moment. Tonight's instance #6159 was filed manually only because the maintainer happened to ask in chat; nothing mechanical converts "the objectui window has settled" into a queued action. Coordination rule 3 (the seat accepting a repo:objectui PR files the linkage chore) is per-PR on paper but the work lands per-window in practice — it did not fire tonight.

The queue steward (#5810) already carries "cross-repo pin-chain observation" as a duty, but its only outputs are briefing mentions and a hint comment — observation with no mechanical product.

Maintainer decision (2026-08-07, in the PM session; quoted verbatim)

A. 队列管家加一条例行职责(推荐,先做)。

Selecting option A of the proposal: the steward's pin watch gains a mechanical output — file-or-refresh the bump chore when a window settles. (Option B, a standing auto-bump draft PR, stays a possible later upgrade and is blocked on #6099.)

Design

Two triggers, each producing ONE chore issue (the steward still never executes the bump — its authority face is unchanged: no code, no claims, no merges):

1. objectui → objectstack (pre-release side): .objectui-sha lags objectui main and objectui's merge queue is empty (the window-settled predicate) ⇒ file/refresh a console-bump chore in objectstack pm:queue. Template = chore(console): bump objectui pin f995a452 → a4cff5b (17 commits / 7 releasing changesets) — required before cutting rc.4 #6159 (lag readings, releasing-changeset list, bump-objectui.sh procedure, objectui pin bump 生成的 console changeset 对破坏性变更零标注 —— digest 只认 major 声明级别,而 objectui 在 v17 窗口内把破坏性声明为 minor + 正文标注 #6099 breaking-annotation re-check, ordering constraint vs the Version Packages PR).
2. objectstack → cloud (post-release side): a new rc/stable tag family is observed ⇒ file the same-shape .objectstack-sha bump chore in cloud's queue (cloud's check:pin-staleness stays advisory — the output is an issue, not a new gate).

Boundaries:

• One open chore max: search for the open same-title chore first; if it exists, refresh it with a comment updating the range — never open a second.
• Rule 3 stays the first producer: the accepting seat filing at accept time is still correct; this duty is the window-level backstop, and collisions are absorbed by the one-open-chore cap.
• New pin-toolchain findings (digest blind spots etc.) still go to the anchor issue as 提请 only.

Implementation

• .claude/skills/pm-dispatch/SKILL.md: new paragraph in 「入队与落地 B」 + the steward duty-table row + the 现役两例 enumeration (PR to follow; Fixes this issue).
• 队列管家 Routine（三仓总管）：合并队列健康专责化 —— flaky 签名分诊 / 原样重投 / 新签名拦截 / 跨仓 pin 链停滞观测（座位 Routine 化第二例，维护者 2026-08-06 拍板） #5810 body: revise prompt clause 6 (currently says hint-comment only) to match, so the copy-block stays canonical.
• Maintainer follow-through (UI-only): the live Routine's prompt was pasted from 队列管家 Routine（三仓总管）：合并队列健康专责化 —— flaky 签名分诊 / 原样重投 / 新签名拦截 / 跨仓 pin 链停滞观测（座位 Routine 化第二例，维护者 2026-08-06 拍板） #5810; after the SKILL PR merges, re-copy the revised clause 6 into the Routines UI prompt. Until then the duty still activates weakly via the prompt's standing instruction to read SKILL 「入队与落地」 A/B each fire.

Related

#5810 (steward anchor) · #6159 (tonight's hand-filed instance, template) · #6099 (digest breaking-annotation blind spot — prerequisite for any future auto-bump) · #6121 (adjacent freshness-workflow observation) · #3340 (the freshness gate this complements) · SKILL Multi-repo coordination rule 3

[hotlong]

Claim: PM session (maintainer-directed tooling change — option A execution, authorization quoted in the issue body)
Session: session_01BickTBKm2JYSNnrtPT8ysa
Branch: claude/rc4-release-tasks-analysis-2d8euw (harness-designated branch for this session)
Worktree: objectstack-rc4-steward
Domain: cross-cutting .claude/ protocol file — maintainer-authorized exception per Guardrails (#5925-6); review requires another seat or a maintainer walkthrough, no self-review-self-merge
File surface: .claude/skills/pm-dispatch/SKILL.md only (plus a body revision on anchor #5810, which is an issue edit, not a file)
Serial constraints cleared: checking open PRs for .claude/skills/pm-dispatch/SKILL.md overlap before pushing; #6131 (spec-property-retirement skill) just merged and touches a different skill directory

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