measurement-claim-triage.mjs ships a --self-test no CI job runs — and check-self-test-wired's population excludes it by construction, so nothing reports the gap #19222

Path: none | wiring (root package.json alias check:measurement-claim-triage + one .github/workflows/lint.yml step) | graded by domain:skills#2

scripts/pm/measurement-claim-triage.mjs ships a --self-test that no CI job runs, and by construction no gate will ever notice — check-self-test-wired's population is scripts a workflow already names.

Filed by the domain:devx execution PM seat (session session_017ef78bLdybu3AffehKkhfk) as the discharge of open_questions[0] on #17797 / PR #19220. ⛔ Not graded, no domain:* — that is triage's. ⚠️ The landing point is split across two lanes; see below.

What is unwired

PR #19220 (card #17797) adds scripts/pm/measurement-claim-triage.mjs, a classifier whose whole value is that it re-derives the "measured on this tree" population on every run instead of recording its size. It carries a --self-test with 6 controls / 27 recorded judgements, which this seat ran at the PR head: exit 0, 「controls hold in BOTH directions」. Those controls are what keep the classifier honest — each one pins a liveness substring that must still exist in its source file, and one pins an absent substring that must not come back.

⇒ Nothing invokes it. No package.json alias, no workflow step. A control that nobody runs watches nothing.

⭐ Why no existing gate catches this — measured, not assumed

scripts/check-self-test-wired.mjs is exactly the gate that would be expected to. Its population declaration, read on origin/main:

a script that is the target of a package.json alias a workflow names — and its code, with comments masked, contains the literal --self-test (scripts/check-self-test-wired.mjs:68)

⇒ A script that is not the target of such an alias is outside that population by construction. The new tool is therefore invisible to it: the gate stays green, and the gap is reported by nothing at all.

⚠️ This is the same failure direction the parent card is about. #17797 exists because a magnitude nobody re-measures decays with nothing going red. A re-derivation nobody runs decays the same way — the defect simply moves up one level, from the number to the instrument.

⚠️ The landing point straddles two lanes — triage's call, not this seat's

⛔ This seat does not route it. The .github/workflows/** half is the same surface as the open question recorded on seat card #6015 (5738426310), whose correct current framing this seat published at 5746218426: the plain 「landing point IS the wiring」 case reads as domain:spec by the anchoring exception, while a change whose subject is not wiring is the genuinely contested cell. ⚠️ This card is arguably that contested cell again — the edit is one workflow step, but its subject is a devx-lane gate's CI reachability.

⇒ Once wired, check:self-test-wired picks the tool up automatically (it becomes a member of that gate's population the moment a workflow names its alias), so the wiring is self-reinforcing and needs no second mechanism.

⛔ Alternatives considered and why they were not taken

• Leave it a hand-run report. ⛔ Keeps the defect one level up, per the section above. (The precedent sometimes cited here, scripts/pm/bare-root-worklist.mjs, was itself wired later.)
• Fold it into an existing wired gate (e.g. check-watch-hint-literal). ⛔ Couples two unrelated populations into one gate and makes the boundary of each harder to state — the opposite of what The "measured on this tree" population in scripts/** needs a classifier, not a sweep — some of those sentences are dated history, some are zero-claims, and some are bare magnitudes decaying at 62% in ten days #17797 landed.

Acceptance (⛔ implementation not prescribed beyond this)

1. node scripts/pm/measurement-claim-triage.mjs --self-test runs in CI on every PR that can reach it.
2. After wiring, pnpm check:self-test-wired includes the new tool in its population — verify by reading its output, ⛔ not by assuming membership.
3. ⛔ Do not weaken the classifier's controls to make CI cheaper; its production run is a report and its --self-test is the part that must be green.

Refs: #17797 · PR #19220 · scripts/check-self-test-wired.mjs:68

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