docs(pm-dispatch): fable quota-exhaustion exemption in Model tiering

[hotlong]

Fixes#8451

What

Writes the maintainer's quota-exhaustion ruling (2026-08-13, verbatim, untranslated: 「fable 如果用完了,可以用 opus」) into the Model tiering section of .claude/skills/pm-dispatch/SKILL.md, as one exemption subclause attached once to BOTH mandatory fable clauses (scope confirmed by the maintainer's on-card 「8451 同意」):

• Conditional, not a new default: only when fable is measurably unavailable (quota exhausted / rate-limited); when fable is available both clauses apply unchanged.
• Mid-card downgrade allowed: the wall kills mid-task rather than refusing to start, so the text says the downgrade may equally happen at re-dispatch time (墙杀在中途,重派时同样可降).
• Floor is opus, never lower.
• Downgrade leaves a trace: actual tier + downgrade reason recorded in the claim comment's Container & model line.

The former absolute phrase 「无向下裁量权」 is replaced by the equivalent-but-now-true framing 「两条唯一降档出口:额度耗尽豁免」 — the sole exit is named, everything else remains non-discretionary.

Line budget (ratchet ceiling 686, file was 685 — headroom 1)

File is now exactly 686 lines (check:pm-skill-ratchet green, headroom 0). The section went 14 → 15 lines; the ~3 lines of new exemption text beyond the 1-line headroom were funded by these compressions inside the Model tiering section:

1. 「政策:」 dropped (redundant lead-in).
2. 「交付物本身是协议/流程/编排结构的最重卡,按卡取用不是新默认」 → 「最重协议/流程/编排卡,按卡取用非新默认」.
3. 「⛔ 强制条款(无向下裁量权)两条」 → 「⛔ 强制条款两条」 — absoluteness now carried by the sole-exit framing above.
4. 「失败模式是漏跑门不是判断失误」 → 「失败在漏跑门不在判断」.
5. 「—— 错在唯一契约上毒化一切下游,是全仓最贵的错误类」 → 「—— 契约错毒化一切下游,全仓最贵」.
6. 「下游适配卡(消费侧清扫)」 → 「下游适配卡」.
7. 「连同尺寸写进认领评论「Container & model」行」 → 「连同尺寸写进同一行」 — the full line name lives three lines up in the exemption clause, same paragraph.

All three pre-existing ruling quotes (2026-08-10 ×2, 2026-08-12) are preserved byte-for-byte; the paragraph was rewrapped to the file's ~96-column convention.

Per the card's region discipline, references/** was NOT touched (held by a parallel card this round) — the exemption is kept compact inside the section instead of adding runbook detail.

Gates

Prompt-named list and the re-derived list (node scripts/pm/dispatch-gates.mjs .claude/skills/pm-dispatch/SKILL.md) are identical — no additional families surfaced. All six run locally, all green:

• check:doc-authoring — 376 files clean
• @objectstack/lint check:doc-formula-expressions — green after building the lint dependency closure (first run was the fresh-worktree unbuilt-deps false red)
• check:nul-bytes — 7642 files, no control bytes
• check:pm-skill-id-lint — 9 files clean (no issue IDs in the new text)
• check:pm-skill-ratchet — 686 lines, ceiling 686
• check:skill-frame-sync — 4 frame copies isomorphic

Merge path

ADR-class: draft PR, maintainer hand-merges. Not to be marked ready, queued, or armed for auto-merge by any AI seat.

Generated by Claude Code

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Generated by Claude Code

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
objectstack	Ignored		Aug 13, 2026 3:57pm