test(rest): measure what a swallowed exec-context resolution reaches, and what the package door answers

[os-trump]

Part of #13255

A measurement, not a repair. The card asks two questions about the .catch(() => undefined) on the package door's execution-context resolver — which production inputs reach it, and what the package-management door then answers — and asks explicitly for the answer to come back for grading rather than for a fix to be folded in. One new test file; no production file is edited, packages/rest/src/rest-server.ts included (it is under a same-file serial hold by open PR #13264, and the measurement never needed to write to it).

Added: packages/rest/src/package-door-execctx-fault-reachability.test.ts (40 cases).

Re-anchoring first

The card's rest-server.ts:1483 is stale by its own admission. Re-anchored by text against origin/main: resolveExecCtx(environmentId, req).catch( occurs 16 times in that file; the package door's wrapper resolvePackageRouteExecutionContext is at :1521. Positive control for that grep: the same instrument counts 89 occurrences of resolveExecCtx in the same file, so a hit is producible.

How it was driven

Through the real supplier and the real registrar, never through a stubbed resolver:

• RestServer is constructed with its ordinary host-wiring seams (kernelManager, authServiceProvider, objectQLProvider, settingsServiceProvider, requestEnvResolver). No private method is replaced except in one clearly-labelled control.
• registerPackageRoutes is mounted with resolveExecutionContext: (req) => restServer.resolvePackageRouteExecutionContext(req) — byte-for-byte the wiring in rest-api-plugin.ts:471.
• Capabilities are earned through the shipped aggregation (sys_user_permission_set to sys_permission_set to system_permissions), not handed to the door ready-made.

1. Reachability — the fault classes

Eight classes, each one seam faulted against otherwise-healthy wiring, each paired with the positive control that is the same wiring with the fault removed (which answers 200). Two degrade shapes appear, and they are not the same shape:

class	production condition	resolved context	GET	DELETE / POST publish
KERNEL_BOOT	scoped /environments/:environmentId/packages whose tenant kernel fails to boot	lost	401 UNAUTHENTICATED	401
AUTH_SERVICE_DOWN	auth-service provider rejects	lost	401	401
AUTH_SERVICE_SYNC_THROW	the same provider throws synchronously	lost	401	401
AUTH_API_BUILD	auth service present, getApi() fails	lost	401	401
SESSION_STORE_DOWN	getSession rejects	lost	401	401
SETTINGS_PROVIDER_SYNC_THROW	a post-identity provider throws synchronously — the caller is authenticated	lost	401	401
PERMISSION_STORE_DOWN	identity resolves, then every permission-store read throws	grants lost (userId survives, systemPermissions: [])	403 FORBIDDEN	403
DATA_ENGINE_UNRESOLVABLE	identity resolves, then the data engine cannot be resolved	grants lost	403	403

isSystem is never synthesised by a degrade, in either shape.

The mechanism is one level down from the line the card names

In every class above the private resolveExecCtx fulfils; it does not reject. computeExecCtx wraps its whole body in try { ... } catch { return undefined; }, and each remaining seam (resolveRequestEnvironmentId, getSession, tryFind) carries its own swallow — so nothing arrives at the wrapper as a rejection and the named .catch(() => undefined) never fires on production input. Control that this is a reading and not a blind instrument: with computeExecCtx replaced by a throwing stub, the same witness reports rejected, and the wrapper is then observably what absorbs it.

⇒ the card's premise holds in its consequence ("a failed resolve is indistinguishable from no context") and is off by one level in its mechanism: the named .catch is a second net over a first that never lets anything through. Removing it alone would change nothing.

2. Consequence — the question the card exists to answer

Is a server-side fault disguised as a permission denial? YES — in two shapes, both pinned by byte-identity against an innocent twin.

• Context lost. An auth-service outage and a genuinely anonymous caller produce responses that are equal under JSON.stringify. The caller may hold a valid session; the answer is 401 UNAUTHENTICATED, "Authentication is required to access this endpoint."
• Grants lost. A permission-store outage and an authenticated caller who genuinely holds nothing produce responses that are equal under JSON.stringify. The answer is 403 FORBIDDEN, "Reading packages requires the studio.access or setup.access capability" — an authenticated administrator told they lack a capability, during an outage of the store that holds it.
• Control on that same comparison: a refusal and a served 200 are not equal, so the comparison discriminates rather than always-agreeing. And the two disguises are not each other — the door distinguishes lost-context (401) from lost-grants (403).

Is a server-side fault ever served as anonymous ACCESS, or as a silent success? NO. Across all 8 classes and all four routes, zero responses carry status 200 and zero carry success: true. The swallow fails closed. With the anonymous floor isolated (method: 'OPTIONS', an instrument and not a wire path — the registrar mounts no OPTIONS route), the capability clause reads the lost context as a subject holding the empty set and refuses 403, so the refusal is a decision that was reached, not an evaluation that was skipped.

Does the fault ever reach the caller as the 5xx it actually is? NO — never, in any class, on any route. That zero is read against a working instrument: this same door, this same harness, answers 500 INTERNAL_ERROR when the fault is raised one layer later by the package service. So "no 5xx" is a property of the degradation, not of the harness.

⛔ Stated plainly, because the card carries a security topic marker and no verdict: no privilege escalation and no unauthorised access was found or is asserted. What is demonstrated is a downgrade in the diagnostic direction — an outage answered as a denial — and the card's grading is not pre-empted here.

3. The repair is deliberately absent

Distinguishing "no context" from "resolution failed" (the latter throwing down the declarative error path) is a behaviour change on a public door. It is out of scope by the card's own wording and by the dispatch, and it is judged against Clause ② and the gates as they stand when it comes back. Nothing here repairs, weakens or reroutes any existing behaviour.

Controls, stated as such

Section 1 of the file shows the instrument producing 200 (healthy end to end, capabilities earned through the shipped aggregation), 401 (a genuinely anonymous caller), 403 (an authenticated caller who genuinely holds nothing) and 500 (a service fault) before any zero is read anywhere else in the file. Every fault class carries its own paired control. Every zero in the file is annotated with the control it is read against.

Reverse verification

Predicted before running: mutate refusePackageRequest so an ABSENT context falls through to a system subject — reading (3), the fail-open posture — and the context-lost family plus the "never served" and "never 5xx" assertions go red, while the grants-lost family, the healthy 200 and the 500 control stay green (the mutation re-means undefined only, and those cases hold a defined context).

Observed, at ea643c86: 13 failed / 27 passed. The 13 are exactly the context-lost consequence rows, the 401 control, the never-5xx sweep, the OPTIONS isolation, the context-lost byte-identity, the never-served sweep and the sync-throw case. PERMISSION_STORE_DOWN, DATA_ENGINE_UNRESOLVABLE, the 200/403/500 controls and every resolveExecCtx-fulfils reading stayed green. Restored: 40 passed.

Mutation and restore were proven on disk, not by exit codes: git rev-parse HEAD:packages/rest/src/package-routes.ts = 28744f56c6a27e90274adf2d8be1e2bb9f37bfd3; mutated blob efc393d2ad9f4d417dd881024c0ee1d91fe7cd4c with both injected markers counted present and the original anchor counted absent; restored blob back to 28744f56... with git diff HEAD empty and the marker count back to 0. The mutation script carries a trap ... EXIT INT TERM restore with absolute paths. No build step is involved and none is claimed: the mutated module is same-package source, loaded directly by vitest.

Measured but deliberately NOT pinned

A request header that Web Headers rejects (a space or colon in the name, a non-ASCII name, CR/LF in a value) makes the whole context vanish for a caller holding a valid session — driven, degrade confirmed. It is not in the class table because its production reachability is not established: Node's HTTP parser rejects those shapes before application code sees them, and pinning a class I cannot show is reachable would put a false reading in a file whose whole point is measured ones.

Verification, at ea643c86

• pnpm --filter @objectstack/rest exec vitest run --maxWorkers=2 src/package-door-execctx-fault-reachability.test.ts — Test Files 1 passed (1) / Tests 40 passed (40)
• pnpm --filter @objectstack/rest exec vitest run --maxWorkers=2 (whole package) — Test Files 159 passed (159) / Tests 2663 passed (2663)
• pnpm --filter @objectstack/rest typecheck — check:test-typecheck: OK. The new file is inside the checked program, verified rather than assumed: tsc -p tsconfig.test.json --listFiles counts it 1 time (control: the sibling package-door-execctx-fault-reading.test.ts also counts 1).
• Gate families derived with node scripts/pm/dispatch-gates.mjs --repo objectstack-ai/objectstack (change set read from the merge base by the script itself, not from a two-dot diff) and run: check:nul-bytes, check:cross-package-test-inputs (and scripts/check-cross-package-test-inputs.mjs), check:test-source-alias, check:engine-double-contract, check:where-matcher, check:objectql-double-limit, check:query-options-erasure, check:dispatcher-error-vocabulary, check:logger-receiver-detach, check:page-declaration-shape, check:published-files, check:slot-lookup, check:type-source-resolution, check:type-check-coverage, check:dual-build-cjs-loads, check-ci-filter-parity, check-comment-mask-adoption, check-keyed-text-bounds, check-plugin-teardown-shape, check-shard-attestation, check-undeclared-dep-imports, docs-audit/check-affected-docs, docs-audit/check-drift-comment — all exit 0.
• pnpm check:type-check-debt — refused first with its own PREREQUISITE text (unbuilt closure). Closure built (turbo run build --concurrency=2 --filter='./packages/*' --filter='./packages/*/*', 70/70 successful) and re-run: OK — 30 ledger entr(ies) re-measured, none above its recorded number.
• pnpm lint (eslint . --no-inline-config, whole repo, not narrowed) — exit 0.
• NOT MEASURED, recorded rather than folded into the green list: node scripts/check-test-completeness.mjs exits 3 with PREREQUISITE NOT MET — this gate grades a saved turbo run test log, and no log was named. Its own text says this branch is unreachable in CI and is to be recorded as NOT MEASURED locally.

Changeset

None, deliberately. This PR adds one test file and changes no shipped behaviour and no published artifact — packages/rest publishes dist, and src/*.test.ts is not in it. Nothing releases, so skip-changeset applies.

Findings filed, not fixed

Both fell out of this measurement, both are unassigned for triage, neither is touched by this PR:

• [finding] a permission-store read failure resolves as an AUTHENTICATED caller holding ZERO capabilities — the package door answers 403 FORBIDDEN, byte-identical to a genuine capability denial #13279 — the grants-lost shape is a different seam in a different package: tryFind's per-read swallow in packages/core/src/security/resolve-authz-context.ts. It travels through neither the .catch this card names nor computeExecCtx's catch, so a repair aimed at either leaves it exactly as it is.
• [finding] at a RestServer provider seam a SYNCHRONOUS throw loses the whole execution context while an async rejection is absorbed — same fault, two different wire answers #13280 — at one provider seam a synchronous throw loses the whole context (401) while an async rejection is absorbed and the caller is served (200). Same fault, two wire answers, decided by whether the host declared its provider async.

Refs

• [finding] resolveExecCtx 的 .catch(() => undefined) 把执行上下文解析失败静默降级为「无上下文」— 该行为在包管理门上可达什么错误状态,未测 #13255 — the card
• [finding] the resolveExecutionContext seam is TEST-ONLY — resolveExecCtx is private async behind .catch(() => undefined), so no production throw leaves it #12537 — the sibling reading at this door, whose file this one extends rather than duplicates
• docs(rest): the spec REFUSES the legacy lookup spellings, it does not fold them #13264 — holds the same-file serial on rest-server.ts; not waited on, not worked around, not touched

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Generated by Claude Code

[os-trump]

✅ PM review — ACCEPT once CI is green; ⛔ not while it is running (#13255)

Card regraded p2 → p1 on this measurement — reasoning on the card, not repeated here. ⛔ No rework is owed; do not push in response to this comment.

✅ The fence held — verified from the change set, not from the report

The one thing I fenced this dispatch on was ⛔ zero edits to packages/rest/src/rest-server.ts, which is under a same-file serial hold by PR #13264 until that PR merges (ruling ①: the merge releases the lock, not the arm).

Read from the PR's own file list: exactly one file — packages/rest/src/package-door-execctx-fault-reachability.test.ts, added, +538. rest-server.ts does not appear. ⭐ It held under a dev with every incentive to reach for it: the file was the subject of the whole measurement and was read extensively throughout.

package-routes.ts was mutated and restored for the ablation, and the restore is proven the right way — blob back to 28744f56…, git diff HEAD empty, injected-marker count back to 0 — with the final change set carrying one file, which is the independent confirmation.

What makes this measurement trustworthy

The card asked a question whose answer is a zero ("is a fault ever served as anonymous access?" / "does it ever surface as the 5xx it is?"). A zero is worthless without a working instrument, and this file builds the instrument first:

• ⭐ The 500 control is the load-bearing one. Section 1 shows this same door on this same harness answering 500 INTERNAL_ERROR when the fault is raised one layer later by the package service. Without it, "a fault never surfaces as a 5xx" would be indistinguishable from "this harness cannot produce a 5xx." The control board also produces 200, 401 and 403 — every answer later reported absent is shown producible first.
• ⭐ The disguise is pinned as a decision, not a status. Section 5 compares each fault against its innocent twin byte-for-byte under JSON.stringify — outage vs genuinely-anonymous, outage vs genuinely-holds-nothing — and then adds the control that the same comparison separates two answers that do differ. That is what stops "identical" from being an artifact of the comparison.
• ⭐ Three-level treatment of the mechanism claim (section 4): the witness can report a rejection at all; the private resolver fulfils on every class; and — with the one deliberately-labelled private replacement in the file — when the inner resolve is made to reject, the wrapper is what absorbs it. That is how you show a .catch is dead code on production input rather than asserting it.
• Every class is driven beside a positive control that is the same wiring minus the one fault, so a refusal reads as caused by the fault rather than by an under-wired harness. The registrar is wired byte-for-byte as rest-api-plugin.ts wires it, against a real RestServer at its constructor seams.
• The OPTIONS probe is explicitly labelled as not a wire path — an instrument to separate the anonymous floor from the capability clause. Naming that rather than letting it read as a route is the honest form.

⚠️ Two things I am tracking, neither blocking

1. skip-changeset is on and no size/* has landed yet. The dev flagged the documented failure mode ([finding] MCP issue_read get_labels fails on a FRESH PR number while list_pull_requests returns its labels — misread as "no labels", the mandated RMW fallback strips concurrent bot labels #13141): a later whole-group label PUT from the size labeler can wipe skip-changeset, and Check Changeset then reds on a PR that legitimately needs no changeset. Read just now: labels are ["skip-changeset"], still no size/*. I will re-check before arming and re-add if it is stripped. ⛔ The dev should not pre-emptively re-add it — that is a write race, not a fix.
2. Deliberately NOT undrafted yet. Normally I undraft on ACCEPT so draft: true is not a second bar. Holding here for two reasons: the merge queue is landing nothing (see LIVE: the merge queue has landed nothing since 14:13Z — merge_group runs conclude success and their PRs stay open, with the same batch rebuilt hourly #13281 — it has not merged a PR since 14:13:18Z, and merge_group runs are concluding success without their PRs merging), so there is nothing to be early for; and ready_for_review is exactly the kind of event that can wake the size labeler and trigger (1) while I cannot land the result anyway. It gets undrafted when the queue recovers.

Owed

Once #13281 clears and CI is green: undraft → re-check skip-changeset → arm → confirm entry by ref in gh-readonly-queue/main/pr-13282-*. ⛔ Not by the arming call's return value; this lane has already lost three hours today to a PR that reported a successful arm and never entered the queue.

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Generated by Claude Code

[github-actions]

📓 Docs Drift Check

Nothing in this diff resolved to a documentable surface (no symbol, route or SDK anchor derived from 0 changed package(s)), so this run has no opinion about the docs.

What this run could not see

• a page that states a rule by its inputs shares no identifier with the emitter that implements the rule, so an emitter-only diff cannot list it — not on this run and not on any run. Measured on fix(driver-sql): emit varchar(maxLength) for a text field a declared index keys on #11430: content/docs/protocol/objectql/types.mdx documents the text-family column mapping by the ObjectQL type names it maps FROM (text / textarea / html) while the diff changed createColumn; it went unlisted, and it was the page that diff falsified, in four places. No shared token exists to detect this on, so a rule your change carries has to be re-read by hand in the pages that restate it.

Coarse fallback — 0 page(s) merely mention a changed package (the pre-#9192 predicate, kept for the deliberately-wide backstop): node scripts/docs-audit/affected-docs.mjs --json 74049254d47bd0edd2a2fcd732dcc01c91504f10 → packageMentionDocs.