docs(pm): adopt the Restart-touch: hold channel and converge the pre-dispatch must-check to the H17 anchor index

[os-warren]

Fixes#10043

Governed surface (.claude/skills/pm-dispatch/**), text-only adoption of the two A rulings from the on-hold trigger-index card's review. The extractor half already ships in the patrol PR (check-half-states.mjs, in the merge queue); this card is the protocol half, so the two land in either order with no gap: the mechanism deliberately preceded the convention.

What changed (2 files, 3 lines edited, net 0 lines)

1. .claude/skills/pm-dispatch/SKILL.md — state model pm:on-hold row: the hold's machine-readable line family gains the canonical channel Restart-touch: (one repo-relative path per line, case-sensitive, line-anchored, same single-channel body discipline as Blocked-by:/Restart-when:; backtick/bullet tolerated, value must be a tracked file — matching the shipped extractor exactly). States what it feeds: the patrol's H17 on-hold trigger-file index. States that existing holds are NOT migrated and produce NO finding — prose-anchor extraction covers them (so nobody "cleans up" the legacy holds; manufacturing warnings for them is the disease the originating card measured).
2. SKILL.md — 标签纪律, the pre-dispatch must-check clause: rewritten to ONE obligation — write side is the state model's Restart-touch: line; at dispatch/fold-check time, read the half-state patrol anchor's H17 on-hold trigger-file index (anchor named structurally: half-state-patrol.yml's ANCHOR_ISSUE pinned issue — no bare issue numbers, per the id-lint rule) and intersect it with the dispatch's file surface; a hit is handled per the hold comment's rider/restart clause. The old text told seat posts to carry a 「派发前必查」 section with per-seat trigger-file lists — a duty the seat-post four-section fixed template never actually carried; the index replaces it. The anchor-first patrol duty already in lanes/*.md is not restated — pointed at, not duplicated.
3. references/lanes/spec.md: its pointer said the must-check follows the seat post's current text; now points at SKILL.md 标签纪律 (the anchor-index intersection). One line, in place.

Note: references/seat-post-protocol.md needed no edit — the card guessed the section might live there; it does not (grep of the whole references tree: the duty lived in the SKILL.md clause plus the spec-lane pointer, both rewritten here).

Line budgets (ratchet)

file	before	after	ceiling
.claude/skills/pm-dispatch/SKILL.md	681	681	682
references/lanes/spec.md	44	44	44

Net zero — both edited clauses were already single physical lines (a table row and an unwrapped bullet tail); no payment owed, no re-wrap performed.

Gates (all at f6af0de41, exit codes captured before any pipe)

Derivation: node scripts/pm/dispatch-gates.mjs (no args, real diff vs merge base f4c2eef46) — 7 families matched; all run locally, all green:

✓ check-skill-line-ratchet: .claude/skills/pm-dispatch/SKILL.md is 681 lines (ceiling 682; headroom 1).
✓ check-skill-line-ratchet: .claude/skills/pm-dispatch/references/lanes/spec.md is 44 lines (ceiling 44; headroom 0).
✓ check-skill-id-lint: 15 file(s) clean (pattern /#[0-9]{3,}/g).
✓ check-governed-prose: 2 instruction surface(s) name all 5 registered governed surfaces (docs/adr/** · .claude/** · skills/** · AGENTS.md · CLAUDE.md) and claim no others.
✓ check-skill-frame-sync: 4 copies of the decision frame are structurally isomorphic across 3 files
✓ doc authoring guard: 379 files clean — no bare metadata literals.
✓ check:doc-formula-expressions: 22 record-scoped formula example(s) across 404 files / 1414 TS blocks judged clean by @objectstack/formula.
check-nul-bytes: OK (scanned 6362 text file(s) -- 6362 tracked, 0 untracked-not-ignored; skipped 5 binary; no raw ASCII control bytes).

check:pm-governed-merges self-test green (81 assertions). Exit codes: all 0, captured via redirect-then-$?, never through a pipe.

Reverse verification (both legs on the committed state; directions predicted in writing first)

• Ratchet ablation — predicted red naming the file: appended 2 lines (681 → 683, over the 682 ceiling) ⇒ exit 1, ✗ check-skill-line-ratchet: .claude/skills/pm-dispatch/SKILL.md is 683 lines; the ratchet ceiling is 682. … Restored via git checkout BRANCH -- PATH (BRANCH = this PR's branch, PATH = the file); sha256 identical before/after (893d5169…), git status --porcelain clean.
• id-lint mutation control — predicted: shipped text stays green (anchor named structurally), and injecting a bare #-number into the new clause turns it red naming SKILL.md, proving the gate reads the exact added text ⇒ exit 1, ✗ check-skill-id-lint: .claude/skills/pm-dispatch/SKILL.md: 1 issue-ID citation(s) — … Restored byte-identical (same sha256), same pattern.
• Both gates read the markdown source directly from the working tree — no dist/ in the resolution path, so no rebuild step applies to these legs.

Tests/docs-only for publishing purposes: .claude/-only diff, publishes nothing — skip-changeset applied (union write + read-back).

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