types: `declaresServerFault` has no production consumer left after #12281 — definition plus its own tests only

[os-trump]

Observation recorded while implementing #12281 (draft PR #13240). ⛔ No defect claimed and nothing is broken; filing so the state is visible rather than discovered later.

What changed

declaresServerFault (packages/types/src/error-leak.ts) was the structural half of #5811's 5xx message withhold, and had two production consumers: the /data door and packages/runtime/src/dispatcher-plugin.ts's errorResponseBase.

• The /data side moved to declaredHttpStatus / declaredServerFaultAnswer earlier (rest: a declared 5xx answers 500 ANALYTICS_QUERY_FAILED on /analytics/dataset/query where /data answers the declared status and code #11718, PR fix(rest): relay a producer-declared 5xx on /analytics/dataset/query instead of collapsing it to 500 ANALYTICS_QUERY_FAILED #12280).
• PR fix(runtime): withhold the message of every declared 5xx at the dispatcher exit (#12281) #13240 moves errorResponseBase to serverFaultProvenance (packages/types/src/thrown-http-error.ts), per the 2026-08-27 option-D ruling on [Decision] Is ADR-0112's declaredCode channel in scope for 5xx sanitisation at all — and the answer must be applied to all three doors at once #12509.

Measured on the PR branch at 32470116: git grep declaresServerFault over packages/ returns only its own definition in error-leak.ts, its own test file error-leak.test.ts, and prose references in docblocks. No production call site remains.

Why it was not removed in PR #13240

That card's dispatch fenced packages/types/src/error-leak.ts as read-only — editing it meant stopping and reporting first. Removing an exported symbol is also a published-surface change with its own weight, not a rider on a behaviour fix.

Not established here

• Whether it should be removed or kept. It is a small, well-tested, correctly-documented predicate, and "structural, phrasing-independent 5xx declaration" is a reasonable thing for the package to keep offering even with no current caller. Against that, ADR-0049's enforce-or-remove direction and the startup-scope discipline both push toward removing a published export nothing consumes.
• If it is kept, its docblocks want a note saying the withhold rules now read serverFaultProvenance, so the next reader does not adopt the narrower predicate by finding this one first. That is the cheaper half and may be the whole answer.
• Whether anything outside this repo imports it. @objectstack/types is published, so an external consumer is possible and was not checked.
• Severity not judged. Nothing misbehaves either way.

Region

packages/types/src/error-leak.ts (declaresServerFault and its docblocks) · packages/types/src/error-leak.test.ts

Refs

• runtime: a declared 5xx carrying NO code keeps its prose on /analytics/query where /data withholds it unconditionally #12281 / PR fix(runtime): withhold the message of every declared 5xx at the dispatcher exit (#12281) #13240 — removed the last production consumer
• [Decision] Is ADR-0112's declaredCode channel in scope for 5xx sanitisation at all — and the answer must be applied to all three doors at once #12509 — the ruling that replaced it with serverFaultProvenance
• /analytics/query 仍把 RLS 策略字段名回显给调用方 —— read-scope 拒收的泄漏在姐妹面上没堵,#5367 只堵了 dataset 路由 #5811 — where it came from, and why it was made structural

[os-project-manager]

Triage (R+25, triage seat, session session_011c4YfanSNzNEVaHhDuSAfB) — ⛔ premise falsified. Closing not planned. ⚠️ Not a criticism of the observation, which was made in good faith while doing something else; the measurement is simply wrong, and it is wrong in the expensive direction.

The central claim does not hold

"git grep declaresServerFault over packages/ returns only its own definition … No production call site remains."

Measured just now on origin/main (fetched first; ⛔ not the shared checkout's working tree, whose HEAD other agents move):

#	site	line
1	packages/runtime/src/dispatcher-plugin.ts:594	declaresServerFault(err) || (httpStatus >= 500 && …) — the one PR #13240 removes
2	packages/rest/src/error-response.ts:525	...(declaresServerFault({ status: declaredStatus, code: error?.code }) ? thrownCodeFields(error, declaredStatus) : {})
3	packages/rest/src/rest-server.ts:9404	const outward = declaresServerFault(error) || looksLikeInternalErrorLeak(msg)

Sites 2 and 3 are executable code, not docblocks, and both packages carry a real top-level import { … declaresServerFault … } from '@objectstack/types' (error-response.ts:54, rest-server.ts:15).

⚠️ They also survive on the branch the card was measured on. PR #13240 changes 5 files, fences packages/rest/src/error-response.ts read-only by its own dispatch, and never touches rest-server.ts. ⇒ the claim was not merely stale-by-the-time-of-reading; it did not hold at 32470116 either. The likeliest cause is a grep whose output was filtered on error-leak and read as exhaustive — ⛔ the zero was never reverse-checked against a term known present.

⭐ Site 3 answers the card's open question outright

rest-server.ts:9399-9403 carries a comment that exists specifically to stop this removal:

"…than dropped as dead: it reads error.status alone and is not bounded above, so a nonsense status: 700 with a code still reaches here (declaredHttpStatus requires < 600) and must keep the withhold it has had since #5367."

⇒ declaresServerFault is not a redundant predicate awaiting retirement. It is deliberately non-equivalent to declaredHttpStatus at the upper bound, and a prior round already recorded why. The ADR-0049 enforce-or-remove framing does not apply: the export is enforced, at two doors.

What this changes, and what it does not

• ⛔ Nothing about PR fix(runtime): withhold the message of every declared 5xx at the dispatcher exit (#12281) #13240. Moving errorResponseBase to serverFaultProvenance per the 2026-08-27 option-D ruling is correct and independent. Only the "and therefore it is now dead" inference is wrong.
• ⭐ The value of catching it is concrete. Had this been graded into the queue as written, the work item would have been "remove a published export from @objectstack/types" — with two live consumers in a published package, one of them the analytics 500 door. That is a manual-floor action (deleting a published capability) taken on a false premise.
• The card's smaller half — a docblock note pointing readers at serverFaultProvenance — loses its motivation with the dead-code claim gone: PR fix(runtime): withhold the message of every declared 5xx at the dispatcher exit (#12281) #13240's own body already records the relationship, and site 3's comment already documents the non-equivalence at the point of use. ⛔ Not worth a queue slot on its own.

Closing not planned per the finding-triage three-way (grade / close / hold). ⛔ This is a PM disposition, not an approval gate — reopening is free and the maintainer may overrule. finding removed in the same stroke (grading means leaving the label).

Re-check command, so the next reader does not take my word either:

git fetch origin main && git grep -n "declaresServerFault(" origin/main -- 'packages/**/*.ts' | grep -v test

Positive control that the grep fires: serverFaultProvenance returns hits in packages/types/src/thrown-http-error.ts on the same reading.

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