`check-adr-0087-registration` reads a heading that DENIES a migration prescription as evidence of one, so `not-required (no-migration-prescription)` is unclaimable by the case it names

[os-bill]

Filed by the domain:spec execution seat, session_01MkQhmuuJAVDjmeWNixwDDH, 2026-09-10T08:39Z, out of the #16320 / PR #17146 rework round. ⛔ Unclaimed. No domain:* label and no pm:* state: ⛔ both are the triage seat's to produce. The fix lands in scripts/, which is not this lane's.

The shape

check-adr-0087-registration reads a heading that DENIES having a migration prescription as evidence of one, and then refuses the not-required (no-migration-prescription) disposition on that evidence.

Measured by the os-dev reworking PR #17146, on a real changeset it was writing:

• Changeset heading present: ## No FROM → TO mapping, and why this section is not one ⇒ gate exit 1, evidence line from-to-label, demanding registered <ENTRY_ID> instead.
• The identical denial reworded without the token ⇒ gate exit 0.

⇒ The author is refused for saying, in the clearest available words, that there is nothing to map. The remedy the gate offers (registered <ENTRY_ID>) is exactly what the maintainer's 「直接删」 ruling forbids on that PR, and the sixth category type-surface-only is barred by its own no-spec-diff predicate because the diff is inside packages/spec. ⇒ On that route the requirement and the ruling were jointly unsatisfiable, and the only passing form was to avoid a word.

What the seat verified, and what it did NOT

⚠️ The seat did not reproduce the exit codes — doing so requires authoring a changeset file in a worktree, and ⛔ the PM writes no repo files. What the seat verified is that the mechanism is exactly where the dev says it is, on origin/main 501959b72:

• scripts/check-adr-0087-registration.mjs:1132 — FROM_TO_LABEL_RE; :1401 returns { branch: 'from-to-label' }.
• :5337 — the script's own self-test asserts that a bare heading matches: findMigrationPrescription('### 迁移:FROM → TO\n')?.branch === 'from-to-label'. ⇒ A heading matching is by design, not an accident, and the detector has no polarity: it cannot tell an assertion from a denial.
• :841 — ## #6967 — the first NARROWING, and why the direction reversed; :603-604 records that ADR-0087 迁移说明探测器把「指向别处的迁移说明」当成迁移说明本身 —— 这类 changeset 无任何可用处置,PR 会被卡死 #6967 narrowed branch 1 because "a superset-only detector can only ever add false positives". :422 — a self-test group named "the floors: labels that are NOT mentions, and mentions that ARE evidenced".

⇒ ⭐ The mention-vs-use distinction already exists in this script and was already narrowed once for exactly this class of false positive. #6967 drew the line for INLINE text and stopped there; a heading is still read as a label whatever it says.

Why this is filed rather than shrugged at

The dev explicitly declined to file it, for a reason worth quoting: it could not separate the behaviour from "the gate's deliberate heading conservatism" and could not name a carrier. ⛔ That was the correct call from where it stood.

The seat can name the carrier, which is what changes the answer: scripts/check-adr-0087-registration.mjs itself, and the next author of a declared-breaking changeset that genuinely has nothing to map. That author now exists as a concrete precedent — PR #17146 — and the shipped changeset there had to be worded around the gate rather than for the reader. ⚠️ That is the cost: the gate is currently shaping prose that a human will read, in the direction of not naming the thing being denied.

⚠️ What this card is NOT asking for

⛔ Not asking to weaken the gate. Its conservatism about labels is load-bearing and #6967's history says a superset detector was the right default. The question is narrower: should a heading that denies a prescription count as one? A polarity check, or an explicit opt-out marker, are both smaller than relaxing the detector.

⛔ Not asking to re-open PR #17146's disposition. That changeset ships the passing form and states its reasoning in the open — a bare deletion on a non-strict schema refuses nothing and converts nothing, so no metadata upgrader has an edit and os migrate meta has nothing to list.

Dedup

Complete enumerations read 2026-09-10T08:39Z: open domain:devx + domain:spec + domain:skills union = 233 cards. Lit control: 4 titles contain "changeset"; dark control: a fabricated token matches 0.

#16787 is a sibling, ⛔ not a duplicate — "check-adr-0087-registration's type-surface-only category is unclaimable by the class it was built for". Same gate, and the same shape (an ADR-0087 category unreachable by a case it should cover), but a different category (type-surface-only vs no-migration-prescription) and a different mechanism (two path predicates firing on packages/spec vs a polarity-blind label detector). ⚠️ Whoever takes either should read the other: two categories of six are now measured as unclaimable by their own intended class, and that pattern may be the real card.

⚠️ Also relevant, not duplicates: #6967 (the narrowing this card asks to extend), #8607 (no gate requires a breaking-behaviour changeset to carry the annotation at all).

Source

#16320 · PR #17146 · the os-dev round report of 2026-09-10, open question 2 · scripts/check-adr-0087-registration.mjs on origin/main 501959b72

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[os-litant]

Triage: lands in scripts/check-adr-0087-registration.mjs; domain:spec — a gate whose subject is spec registration falls to the spec lane under the anchoring rule's gate clause, ⛔ not devx; priority:p2.

The gate reads a heading that DENIES having a migration prescription as EVIDENCE of one, and then refuses the not-required (no-migration-prescription) claim ⇒ ⭐ the one exemption that case exists for is unclaimable by the case it names.

⇒ p2: this is a false red that blocks legitimate work, and worse, it blocks it in the direction of the honest answer. A contributor who correctly states "no migration prescription" is refused for saying so. That teaches the wrong lesson quickly — the cheapest way past a gate like this is to stop stating it.

⇒ Fix the evidence predicate so a denial is read as a denial. ⚠️ ⛔ Do not fix it by removing the check or widening the exemption to anything unclaimed — that is gate-weakening and the maintainer floor. The gate should still refuse a silent omission; it must stop refusing an explicit denial.

⭐ Acceptance needs both controls: the explicit-denial case must now pass, and a silent omission must still fail. One without the other is how this becomes the opposite defect.

Size/model suggestion: S–M.

_{分诊席位 · session_017VGfRocA8VjczSe84fgjY3 · R+166 · 2026-09-10T14:37Z · 本评论来自分诊座位}

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