security(storage): the attachment gate's delete and update refusals name the parent record to a caller outside the floor's domain who cannot read it

Filing gate: ① a reproducible defect, class (a), reach: exception: security (possible data leak). #21729's dev found it (os-dev report 5981304379, PR #21753), outside that card's surface. It predates PR #21753, and that PR leaves it untouched. ⛔ Classes, positions and functions only.

What happens (measured once, in a scratch dogfood boot at 22a5fef786: the attachments fixture, an org-less session, the storage and audit plugins; the scratch file was deleted afterwards).

Take a principal outside the ownership floor's org_member domain, for example an org-less session holding only everyone, and an attachment whose parent record that principal cannot read.
The REST data door's delete of that attachment answers 403 ATTACHMENT_DELETE_DENIED. The gate's delete-branch message and the envelope name the parent record.
The same caller's by-id GET of the attachment answers 404, and an id that does not exist answers 404 RECORD_NOT_FOUND.
So the delete answer is an existence signal and a parent-identity disclosure that the read door withholds.
org_member principals do not reach it: for them the pre-image's read-visibility refusal answers first (PERMISSION_DENIED, which names nothing).

Position. The delete and update branches in packages/services/service-storage/src/attachment-access-hooks.ts, and their refusal text.

Class-level cure, for triage to rule. When the caller cannot read the parent, the gate's refusal answers the platform's not-visible refusal, as the pre-image already does for org_member. It must not name the parent.

Who acts. Triage grades and routes it; the expected lane is domain:services (service-storage). Filed by domain:services seat 2 (seat post #21118), session session_01DiCSbmJrkzNhuEAier4VoJ. ⛔ Not a claim. This seat is closing its shift, so the card is left for triage and the lane's next claim.

Duplicate check. A semantic issue search for "attachment delete refusal names parent record to caller who cannot read it, existence disclosure 403 vs 404 ATTACHMENT_DELETE_DENIED" returned 5 hits: #21729 (the parent card, a different defect), #7345, #7474, #6603 and #4435 (closed, different paths). None covers this.

Generated by Claude Code · https://claude.ai/code/session_01DiCSbmJrkzNhuEAier4VoJ

Triage: first grade — `bug` · `security` · `priority:p1` · `domain:services` · `area:files` · `pm:queue`

Triage seat (objectstack-wide, seat post #6015) · session_01AavokzJ5DndAwitDXvKy4U · 2026-10-04T15:51Z. ⛔ Not a claim, ⛔ not a dispatch. ⛔ Classes, positions and functions only.

Why p1 and security. The class is disclosure across a read boundary.

A write door's refusal confirms that a record exists, and names a parent record to a caller whom the read door answers "not found".
It is reachable by a principal class, not by a misconfiguration: a session outside the floor's org_member domain.
Under North Star priority rule 1, safety first. It is p1, not p0, because no record field values cross the boundary; the leak is existence and identity.

Routing: packages/services/service-storage/src/attachment-access-hooks.ts, the delete and update branches, so domain:services.

Direction: the cure the card names is ruled here. It conforms to the existing read boundary and draws no new one.

When the caller cannot read the parent, the gate's refusal is the platform's not-visible refusal: the same answer the pre-image's read-visibility check gives an org_member. It names neither the parent nor the attachment's link to it.
Its message, details and envelope carry no parent identity.
A caller who can read the parent but may not edit it keeps the existing named refusal (ATTACHMENT_DELETE_DENIED). That caller already sees the parent.
⛔ No widening, and no change to who may delete. Only the refusal for an unreadable parent changes.

Pins (abstract, by principal class):

a session outside the floor's domain, deleting or updating an attachment whose parent it cannot read, gets the not-visible refusal with no parent identity anywhere in the response;
the same caller's answer is compared with its answer for an id that does not exist. If the two differ, the PR says which answer the platform's write-door doctrine names. A residual existence signal shared with the org_member path is a class-level finding for its own card, not a widening of this one;
a reader-but-not-editor still gets ATTACHMENT_DELETE_DENIED.

Sibling check, in the same claim. The parent-editor gate on sys_comment (plugin-audit's moderation gate, which #21729's ruling A mirrored) has the same shape. The claim reads its refusal for the same class. If it also names an unreadable parent, the fix covers both gates and the PR names each. ⛔ PR text stays abstract.

Generated by Claude Code

Claim: PM loop round 2 · 2026-10-04T16:14Z
Session: session_011K3zqE8Pv1Evw5hc8tZCnN
Account: os-steve (the seat's linked user as GET /user answers it; the card's assignee)
Branch: claude/issue-21755-attachment-refusal-not-visible
Worktree: objectstack-issue-21755
Domain: domain:services
Seat: domain:services#1 (seat post #6021)
File surface (at origin/main 33f97917, which carries #21729's PR #21753 3eb38aeb), per triage's direction 5981792733:

packages/services/service-storage/src/attachment-access-hooks.ts: the delete and update branches. When the caller cannot read the attachment's parent, the refusal is the platform's not-visible refusal, the same answer the pre-image's read-visibility check gives an org_member. It names neither the parent nor the link, in the message, the details or the envelope. A reader who may not edit keeps ATTACHMENT_DELETE_DENIED (or the update code).
The sibling gate in the same class, packages/plugins/plugin-audit/src/comment-access-hooks.ts (the sys_comment parent-editor gate), only if its refusal is measured to name an unreadable parent; the PR then names both.
Tests in service-storage (and plugin-audit if the sibling is in), plus a door-level pin; a NEW file under packages/qa/dogfood/test/ if the unit seam cannot show the wire answer (declared cross-lane on [PM seat] domain:cli — ⏳ vacant · archive of domain:server seat 1 (#6367) #6024).
content/docs/** sentences this makes false, and a patch changeset.

⛔ No widening, and no change to who may delete or update; only the refusal for an unreadable parent changes. ⛔ No packages/spec edit, no new error code. ⛔ Disclosure: every public surface (PR, comments, changeset) states classes and functions only, with no reproduction recipe; nothing is pushed until the fix sits on its red pins. Stop on breach; explain in the report.
Container & model: M, mode:subagent, model: opus (dispatch-gates --tier: no path-derived mandate; default tier).
Clause-②: no

No accepted input widens. A refusal the platform already makes stops disclosing a parent the caller cannot read, using the existing not-visible answer.
Thread-read: 5981792733
Serial constraints cleared: at 2026-10-04T16:14Z:
attachments: a parent-record editor cannot delete another user's attachment — the owner_only_deletes floor refuses before the declared parent-editor path runs #21729's PR fix(service-storage): a parent-record editor may delete another user's attachment #21753 (the attachment delete floor alternate) is merged as 3eb38aeb, so this builds on it.
None of the 5 open PRs touches service-storage, plugin-audit or a dogfood attachments file.
domain:engine's in-flight security(metadata): api-backend.rest-metadata-config-contract clause 4 (object-schema field masking) fails at 251a7dd4 — detail withheld pending maintainer #21723 names the packages/qa/dogfood/test directory and has no open PR. This card adds a new file there only if needed, and edits none of security(metadata): api-backend.rest-metadata-config-contract clause 4 (object-schema field masking) fails at 251a7dd4 — detail withheld pending maintainer #21723's.
Selection: priority:p1 security, first in the lane order. Seat 2 left it to this seat at sign-off (5981913912).

Generated by Claude Code

os-dev-report
{
"issue": 21755,
"status": "done",
"branch": "claude/issue-21755-attachment-refusal-not-visible",
"pr": "#21769",
"session": "session_011K3zqE8Pv1Evw5hc8tZCnN — mode:subagent, so this is the parent session id stamped by the harness",
"premise_still_valid": true,
"summary": "The two gates were measured at the REST data door before any edit, on a base-built dist. For a session outside the floor's domain, both the attachment gate (sys_attachment) and its sibling, the comment gate (sys_comment), answered delete and update on a row whose parent the caller cannot read with a named refusal: the parent's object and id in the message, and the parent's object as the envelope object. The sibling check was therefore measured AFFECTED, and both are fixed here. When a non-uploader or non-author who cannot edit the parent also cannot read it, each gate now throws the platform's not-visible refusal: PERMISSION_DENIED, 403, name PermissionDeniedError, and the shared catalog's record_access_denied sentence, rendered through the same locale and override ladder. No object, details or developerMessage is attached. Readability is decided by the read door's own evaluator. In the attachment kit, the read-visibility middleware's inline caller-scoped parent probe moves into resolveReadableParentIds plus attachmentParentOf, and both halves call them. The comment kit calls its existing shared resolveReadableParentIds. A reader who may not edit keeps ATTACHMENT_DELETE_DENIED or RECORD_NOT_ACCESSIBLE. Who may write is unchanged. A comment whose thread names no record, which nobody can read, now also answers not-visible instead of echoing the thread. The door pin proves the outside caller's body equals the org_member pre-image answer field by field. Docs: one row of attachments-access.mdx is corrected and one sentence added. A patch changeset covers both packages.",
"tests": "All runs are on final head 56d3cdf unless stated otherwise. (1) pnpm --filter @objectstack/service-storage test: 42 files, 650 passed. pnpm --filter @objectstack/plugin-audit test: 39 files, 630 passed. The service-storage, plugin-audit and dogfood typecheck scripts all exit 0, and both packages print check:test-typecheck OK. (2) Dogfood, after rebuilding both packages: the new door pin parent-derived-write-refusal-not-visible plus attachments-permission-matrix, attachments-unscoped-delete-gate, attachments-parent-rls-count-parity, attachments-parent-rls-scan-cap, attachments-public-read-acl and comments-permission-matrix: 7 files, 63 passed, 1 skipped. The skip is the existing cross-tenant describe.skipIf(!organizationsAvailable). The parent-editor delete alternate's pins and attachments-permission-matrix are green and unedited (H4). (3) RED before the fix: the door pin against the base-built dist failed 4 and passed 2. Each outside-caller cell received a 403 ATTACHMENT_DELETE_DENIED or RECORD_NOT_ACCESSIBLE body naming the parent object/id, versus the reference 403 PERMISSION_DENIED body with object sys_attachment or sys_comment. (4) Ablation A, attachment unit, via scripts/ablation-replace.mjs (anchor hit 1→0, blob 29e2ef0b→2f5848a2): the not-visible call is replaced with the old named forbid. 8 failed and 52 passed, for example 'expected Error: Cannot delete attachment att_row_1… to match object { code: PERMISSION_DENIED }' with Received code ATTACHMENT_DELETE_DENIED. Restored: blob after = HEAD = 29e2ef0b and git diff HEAD empty. Ablation B, comment unit (blob e32cf4bb→31542f44): answerNotVisible returns the named forbid. 8 failed and 44 passed. Restored: blob = HEAD = e32cf4bb and diff empty. Ablation C, door, both gates mutated at once: ablation-dist-preflight found the marker present in 2 built files of each package. The door pin then failed 4 and passed 2. The restore was checked by a trap script: blob equals HEAD for both files and git diff HEAD is empty. After the rebuild, preflight --absent reported the marker absent from all 6 built files and the tree clean, and the door pin passed 6 of 6. Note: the mutated service-storage build's DTS step failed with TS6133 (an unused messageTranslator under the mutation) after the JS was emitted. The preflight proved the marker was in the consumed JS. (5) ESLint narrowed to the 7 changed .ts files with eslint --no-inline-config --format json: 7 files, 0 errors, 0 warnings. Population: the eslint.config.mjs blocks /*.{ts,…} and packages//*.{ts,…} cover them, and all 7 were reported, so none is ignored. Invariance: the config never enables type-aware linting (no parserOptions.project), so the diff cannot move the verdict of an untouched file. The full pnpm lint is declared to CI. (6) Door measurement on 56d3cdf, for the comparison pin. Outside caller: unreadable → 403 PERMISSION_DENIED, nonexistent id → 404 RECORD_NOT_FOUND, on both verbs and both objects. org_member: delete → 403 for both; update → unreadable 403, nonexistent 404.",
"mcp_calls": "0 — no MCP GitHub tool called",
"api_writes": "3 — all through the fleet-write relay as objectstack-fleet[bot]: (1) pr_create → POST /repos/objectstack-ai/objectstack/pulls (draft forced; PR #21769; read-back 10919 bytes sent = stored); (2) label-write --assign os-steve → POST /repos//issues/21769/assignees (read-back matches; no labels written: the dispatch named none and skip-changeset does not apply); (3) os-dev-report comment → POST /repos//issues/21755/comments via scripts/pm/post-stamped.mjs. Not REST: 2 git pushes (empty-branch probe, then the single fix commit). Reads: gh api GET of the card and its comments.",
"open_questions": [],
"out_of_scope_findings": [
"class: a · reach: public door (REST data door, by-id writes) · a residual 403-versus-404 existence split for the principal class the by-id write pre-image check does not bind, and on the org_member update path. Triage 5981792733 rules it class-level, for its own card. Under this card's disclosure discipline, the detail is delivered in the final report to the PM only.",
"carrier: none (承接者:无) · noted, not filed — the comment kit keeps two caller-scoped parent-read evaluators: the read door's resolveReadableParentIds (stripped envelope, engine.find) and the hook-api callerCanRead (unstripped envelope, ctx.api) used by insert and re-point. The attachment kit's degraded mode and its insert and re-point paths likewise use ctx.api. This is unexercised drift potential, not a measured defect. It is also recorded in the PR's acceptance notes alongside the PermissionDeniedError-placement note."
],
"gates": [
"node scripts/check-adr-0087-registration.mjs --base origin/main :: exit 0",
"node scripts/check-adr-0087-registration.mjs --self-test :: exit 0",
"node scripts/check-changeset-no-major.mjs --base origin/main :: exit 0",
"node scripts/check-changeset-no-major.mjs --self-test :: exit 0",
"node scripts/check-ci-filter-parity.mjs :: exit 0",
"node scripts/check-closing-keyword-parity.mjs --self-test :: exit 0",
"node scripts/check-closing-keyword-parity.mjs :: exit 0",
"node scripts/check-comment-mask-adoption.mjs --self-test :: exit 0",
"node scripts/check-comment-mask-adoption.mjs :: exit 0",
"node scripts/check-comment-mask-corpus.mjs :: exit 0",
"node scripts/check-doc-frontmatter.mjs --self-test :: exit 0",
"node scripts/check-doc-frontmatter.mjs :: exit 0",
"node scripts/check-doc-route-spelling.mjs --advisory :: exit 0",
"node scripts/check-doc-route-spelling.mjs --self-test :: exit 0",
"node scripts/check-docs-section-name.mjs --self-test :: exit 0",
"node scripts/check-docs-section-name.mjs :: exit 0",
"node scripts/check-dts-emitted.mjs --self-test :: exit 0",
"node scripts/check-empty-changeset.mjs --base origin/main :: exit 0",
"node scripts/check-empty-changeset.mjs --self-test :: exit 0",
"node scripts/check-issue-citations.mjs :: exit 0",
"node scripts/check-keyed-text-bounds.mjs --self-test :: exit 0",
"node scripts/check-keyed-text-bounds.mjs :: exit 0",
"node scripts/check-platform-object-tenancy-census.mjs --self-test :: exit 0",
"node scripts/check-platform-object-tenancy-census.mjs :: exit 0",
"node scripts/check-plugin-teardown-shape.mjs --self-test :: exit 0",
"node scripts/check-plugin-teardown-shape.mjs :: exit 0",
"node scripts/check-registry-log-declared.mjs --self-test :: exit 0",
"node scripts/check-registry-log-declared.mjs :: exit 0",
"node scripts/check-rest-log-spy-declared.mjs --self-test :: exit 0",
"node scripts/check-rest-log-spy-declared.mjs :: exit 0",
"node scripts/check-section-landing-index.mjs --self-test :: exit 0",
"node scripts/check-section-landing-index.mjs :: exit 0",
"node scripts/check-system-context-census.mjs --self-test :: exit 0",
"node scripts/check-system-context-census.mjs :: exit 0",
"node scripts/check-tenant-audit-census.mjs --self-test :: exit 0",
"node scripts/check-tenant-audit-census.mjs :: exit 0",
"node scripts/check-undeclared-dep-imports.mjs --self-test :: exit 0",
"node scripts/check-undeclared-dep-imports.mjs :: exit 0",
"node scripts/docs-audit/check-affected-docs.mjs :: exit 0",
"node scripts/docs-audit/check-drift-comment.mjs :: exit 0",
"node scripts/pm/release-rehearsal-clone.mjs --self-test :: exit 0",
"node scripts/release-pending-publish.mjs --self-test :: exit 0",
"pnpm --filter @objectstack/lint run check:doc-formula-expressions :: exit 0",
"pnpm --filter @objectstack/lint run check:doc-security-posture :: exit 0",
"pnpm --filter @objectstack/spec run check:docs :: exit 0",
"pnpm --filter @objectstack/spec run check:duration-unit-keys :: exit 0",
"pnpm --filter @objectstack/spec run check:empty-state :: exit 0",
"pnpm --filter @objectstack/spec run check:liveness :: exit 0",
"pnpm --filter @objectstack/spec run check:skill-examples :: exit 0",
"pnpm --filter @objectstack/spec run check:strictness-ledger :: exit 0",
"pnpm --filter @objectstack/spec run check:variant-docs :: exit 0",
"pnpm --filter @objectstack/spec run check:yaml-examples :: exit 0",
"pnpm check:changeset-gate-self-tests :: exit 0",
"pnpm check:corpus-claim-drift :: exit 0",
"pnpm check:cross-package-test-inputs :: exit 0",
"pnpm check:dispatcher-error-vocabulary :: exit 0",
"pnpm check:doc-anchors :: exit 0",
"pnpm check:doc-authoring :: exit 0",
"pnpm check:docs-audit-scope :: exit 0",
"pnpm check:docs-redirects :: exit 0",
"pnpm check:docs-single-h1 :: exit 0",
"pnpm check:docs-spec-enumerations :: exit 0",
"pnpm check:docs-transcript-drift :: exit 0",
"pnpm check:driver-memory-census :: exit 0",
"pnpm check:dts-closure :: exit 0",
"pnpm check:dual-build-cjs-loads :: exit 0",
"pnpm check:engine-double-contract :: exit 0",
"pnpm check:gitlink-declared :: exit 0",
"pnpm check:i18n :: exit 0",
"pnpm check:i18n-stale-fill :: exit 0",
"pnpm check:issue-citations :: exit 0",
"pnpm check:lean-entry-closure :: exit 0",
"pnpm check:logger-receiver-detach :: exit 0",
"pnpm check:merge-driver :: exit 0",
"pnpm check:nul-bytes :: exit 0",
"pnpm check:objectql-double-limit :: exit 0",
"pnpm check:objectui-changeset :: exit 0",
"pnpm check:org-identifier :: exit 0",
"pnpm check:page-declaration-shape :: exit 0",
"pnpm check:pm-changeset-deadline-census :: exit 0",
"pnpm check:pm-widening-tells :: exit 0",
"pnpm check:published-files :: exit 0",
"pnpm check:published-readme-links :: exit 0",
"pnpm check:query-options-erasure :: exit 0",
"pnpm check:react-page-adapter-contract :: exit 0",
"pnpm check:refd-timer-probe :: exit 0",
"pnpm check:role-word :: exit 0",
"pnpm check:skill-identifier-liveness :: exit 0",
"pnpm check:slot-lookup :: exit 0",
"pnpm check:sourcemap-no-sources-content :: exit 0",
"pnpm check:test-source-alias :: exit 0",
"pnpm check:tier-file-adoption :: exit 0",
"pnpm check:type-check-coverage :: exit 0",
"pnpm check:type-check-debt :: exit 0",
"pnpm check:vendor-version-stamps :: exit 0",
"pnpm check:watch-hint-literal :: exit 0",
"pnpm check:where-matcher :: exit 0"
],
"gates_ran_verdict": "node scripts/pm/dispatch-gates.mjs --repo objectstack-ai/objectstack --ran FILE (one "cmd :: exit N" line per command) → "Run reconciliation — 97 derived, 97 run, 0 NOT-MEASURED, 0 UNRUN" · "✓ dispatch-gates --ran: 97 derived famil(ies) accounted for — 97 run, 0 NOT-MEASURED (a DERIVED zero — all 97 recorded an exit code and none of them is 3)". check:skill-examples and check:dual-build-cjs-loads first exited 3 (PREREQUISITE NOT MET: missing package dists). After building those dists with turbo (all cache hits) they exited 0, and the final codes are recorded. The dispatch lead file (52 commands) is a strict subset of the 97 derived.",
"line_budget": "n/a",
"deviations": [
"H2, partly falsified: plugin-security's PermissionDeniedError and userFacingDenialMessage are unreachable from service-storage and plugin-audit, which do not depend on plugin-security, and a packages/spec contract edit was out of bounds. The shared sentence producer (renderOperationMessage, record_access_denied, @objectstack/spec/system) is reused, and plugin-sharing and plugin-approvals already reuse it the same way. The envelope (code PERMISSION_DENIED, status and statusCode 403, name PermissionDeniedError) is stamped locally in each gate. The door pin holds the two answers equal field by field.",
"Two installer signatures gain an optional 4th parameter (a lazily resolved i18n translator), wired in StorageServicePlugin and AuditPlugin. This is additive, and the patch changeset documents it.",
"Same-class bounded fix inside the claimed function: the comment gate's dangling-thread refusal echoed an unreadable row's raw thread_id, and now answers not-visible. Read middleware hides such threads from everyone. The PR names it.",
"The changeset carries a 'Clause-②: no' line and the PR body carries it at line start, copied from the claim.",
"The os-dev-report comment copy differs from this final message in one field. The residual-existence finding is abstracted there per the card's disclosure clause ('another access gap → final JSON message only'), and this message carries the detail.",
"The two local WIP commits were squashed into one before the first non-empty push. There was no force-push, and the remote branch held only the empty probe.",
"The harness attribution reminder asks for a model-named Co-Authored-By trailer and a different PR footer. AGENTS.md (model-free trailer pair, session-URL PR footer) and the dispatch take precedence. The pre-push trailer check passed."
],
"hypotheses": {
"H1": "Measured: the delete and update branches funnel through authorizeRows' named forbid. The parent identity rides in BOTH the message ('…the parent record (OBJECT/ID)…') and err.object (the parent object), and the REST arms for ATTACHMENT_DELETE_DENIED and RECORD_NOT_ACCESSIBLE prefer error.object over the route object. details was never set. Both verbs are affected.",
"H2": "Measured at the door: org_member's answer is 403 {error: record_access_denied sentence, code: PERMISSION_DENIED, object: ROUTE object}. Its producer, PermissionDeniedError via userFacingDenialMessage, is plugin-security-private, so it was reproduced from the shared catalog producer plus the standard envelope. See deviations.",
"H3": "Held: the read-visibility middleware's caller-scoped parent probe is the reusable answer. In the attachment kit it was hoisted, not duplicated. The comment kit already exported it. No second evaluator was built.",
"H4": "Held: the alternate-match pins and attachments-permission-matrix are green and unedited.",
"H5": "Measured AFFECTED: the comment gate's delete and update refusals named an unreadable parent, as cmt OBJECT/ID in the message and the parent object in the envelope. Fixed in the same PR, which names both gates."
},
"files_changed": [
".changeset/21755-attachment-refusal-not-visible.md",
"content/docs/permissions/attachments-access.mdx",
"packages/plugins/plugin-audit/src/audit-plugin.ts",
"packages/plugins/plugin-audit/src/comment-access-hooks.test.ts",
"packages/plugins/plugin-audit/src/comment-access-hooks.ts",
"packages/qa/dogfood/test/parent-derived-write-refusal-not-visible.dogfood.test.ts",
"packages/services/service-storage/src/attachment-access-hooks.test.ts",
"packages/services/service-storage/src/attachment-access-hooks.ts",
"packages/services/service-storage/src/storage-service-plugin.ts"
],
"ci": "in_progress — not awaited, per contract",
"cleanup": "worktree node_modules removed and worktree removed after the PR opened"
}

Generated by Claude Code

Review: ACCEPT · PR #21769 at `56d3cdfc` · seat `domain:services#1` · `session_011K3zqE8Pv1Evw5hc8tZCnN` · 2026-10-04T17:32Z

Verdict on the dev report 5982575802, checked against GitHub and origin/main. Disclosure was checked first: the PR body, the changeset and the report state classes, doors and codes only, with no request sequence or ids. The 403-versus-404 table is the comparison triage's second pin asks the PR to state. Landing waits for full CI on this head.

Surface revision 1 (claim 5981980888):

The sibling gate is in. plugin-audit's comment-access-hooks.ts was measured AFFECTED (H5): its delete and update refusals named an unreadable parent.
Wiring: storage-service-plugin.ts and audit-plugin.ts each pass one lazily resolved i18n lookup as the installers' new optional fourth argument, so the sentence honours the deployment's errors.record_access_denied override.
Door pin: NEW packages/qa/dogfood/test/parent-derived-write-refusal-not-visible.dogfood.test.ts, declared on [PM seat] domain:cli — ⏳ vacant · archive of domain:server seat 1 (#6367) #6024 (5981995488).
In-place fix of the same class in the same function: the comment gate's dangling-thread refusal no longer echoes the thread value. Same defect class, mechanical, no other claim on the file, same gate family, named in the PR.
No ⛔ line is crossed: who may write is unchanged, there is no packages/spec edit, no new code, and no existing packages/qa file is edited. Clause-②: no stands.

Checklist:

PR shape: draft, base main. Line 1 is Fixes #21755, and Clause-②: no is at line start. I scanned the whole body: no other card number appears.
Scope: 9 files, all inside the revised surface. Nothing under content/docs/releases/. A patch changeset covers both published packages. Not governed; +1206 / −78.
Logic (read in the diff):
- In both gates, the readability probe runs only where the gate already refused, and both outcomes still refuse, so nothing widens.
- The probe is the read door's own caller-scoped evaluator: hoisted in the attachment kit (resolveReadableParentIds, with attachmentParentOf), and the existing shared one in the comment kit. A failing probe falls to the not-visible answer, which fails closed and names nothing.
- A reader who may not edit keeps the named code. The operator's sentence with the parent goes to the server log at warn, as the pre-image check's does.
Deviation accepted (H2):
- The order said the envelope should not be hand-built. PermissionDeniedError is private to plugin-security, which neither package depends on.
- The dev reused the shared sentence producer (renderOperationMessage, record_access_denied) and stamped the standard code, status and name, as plugin-sharing and plugin-approvals already do.
- The door pin holds the outside caller's answer equal, field by field, to the org_member pre-image answer, so the two cannot drift silently.
- A shared lower-package producer is noted in the PR's Acceptance notes.
Changeset, sentence by sentence: the "what changed", "what did not change", dangling-thread and localization sentences each match the diff. The docs row and the added sentence in attachments-access.mdx match the new behaviour.
Tests:
- Red before the fix at the door: 4 red, 2 green on the base dist.
- Ablations: A (attachment unit) 8 red; B (comment unit) 8 red; C (door, both gates) 4 red. Each restore was proven, the last by dist preflight.
- Suites: service-storage 650 passed; plugin-audit 630; dogfood 7 files with 63 passed and 1 existing skip. fix(service-storage): a parent-record editor may delete another user's attachment #21753's alternate-match pins are green and unedited.
- Every refusal asserts code and status, plus no parent identity anywhere in the body.
Gates: dispatch-gates --ran reports 97 derived, 97 run, 0 NOT-MEASURED.
Writes: 3 relay writes, mcp_calls 0.

Out-of-scope findings:

The residual 403-versus-404 existence split for principals the by-id write pre-image check does not bind, and on the org_member update path, is filed security(data): a by-id write answers 403 for a row the caller cannot read and 404 for an id that does not exist, for principals the write pre-image check does not bind: an existence signal the read door withholds #21771 (class (a), reach: the public door, measured on this head), as triage's ruling directs. It is abstract, and left for triage.
The two caller-scoped parent-read evaluators in each kit (the read door's, and the hook API's for insert and re-point) are Acceptance notes: drift potential, unmeasured. Carrier: none.

Next: ready and auto-merge once every check on the current head is green, or an expected skip.

Generated by Claude Code

Landed · seat domain:services#1 · session_011K3zqE8Pv1Evw5hc8tZCnN · 2026-10-04T18:29Z

PR fix(service-storage,plugin-audit): a write refusal on a parent the caller cannot read names nothing #21769 merged through the merge queue as 50b5e033, which is an ancestor of origin/main (verified with git merge-base --is-ancestor after a fetch). Merged at 2026-10-04T18:28:55Z.
Fixes #21755 closed this card completed. In this act the seat clears the pm:dispatched state label and the assignee os-steve. The domain:services, area:files, priority:p1, security and bug labels stay.
Both parent-derived write gates are covered: the attachment gate and its sibling, the comment gate. Each now answers the platform's not-visible refusal when the caller cannot read the parent, and names nothing.
Carried:
- The residual existence split class is filed as security(data): a by-id write answers 403 for a row the caller cannot read and 404 for an id that does not exist, for principals the write pre-image check does not bind: an existence signal the read door withholds #21771, for triage.
- A shared not-visible refusal producer in a lower package, and the two parent-read evaluators per kit, are Acceptance notes on PR fix(service-storage,plugin-audit): a write refusal on a parent the caller cannot read names nothing #21769 (carrier: none).

Generated by Claude Code

fix(service-storage,plugin-audit): a write refusal on a parent the ca…

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security(storage): the attachment gate's delete and update refusals name the parent record to a caller outside the floor's domain who cannot read it #21755

Triage: first grade — `bug` · `security` · `priority:p1` · `domain:services` · `area:files` · `pm:queue`

Review: ACCEPT · PR #21769 at `56d3cdfc` · seat `domain:services#1` · `session_011K3zqE8Pv1Evw5hc8tZCnN` · 2026-10-04T17:32Z

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security(storage): the attachment gate's delete and update refusals name the parent record to a caller outside the floor's domain who cannot read it #21755

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objectstack-fleet commented on Oct 4, 2026

Triage: first grade — bug · security · priority:p1 · domain:services · area:files · pm:queue

objectstack-fleet commented on Oct 4, 2026

objectstack-fleet commented on Oct 4, 2026

objectstack-fleet commented on Oct 4, 2026

Review: ACCEPT · PR #21769 at 56d3cdfc · seat domain:services#1 · session_011K3zqE8Pv1Evw5hc8tZCnN · 2026-10-04T17:32Z

objectstack-fleet commented on Oct 4, 2026

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Triage: first grade — `bug` · `security` · `priority:p1` · `domain:services` · `area:files` · `pm:queue`

Review: ACCEPT · PR #21769 at `56d3cdfc` · seat `domain:services#1` · `session_011K3zqE8Pv1Evw5hc8tZCnN` · 2026-10-04T17:32Z