plugin-security closeout (explain ≠ enforce): object-level `security.explain` answers `allowed: true` under a row-level policy comparing two fields of no shared class, while `find` refuses it with `INVALID_FILTER` / 400

[objectstack-fleet]

Filing gate: ① a product defect with a named landing site.

• Class: (a).
• reach: a public door, measured at the service method POST /api/v1/security/explain calls (explainAccessForCaller), on better-sqlite3 at PR fix(plugin-security): security/explain answers enforcement's refusal for a row-level policy comparing two fields of no shared comparison class #20598's head 5e48f52c.

Family closeout (fold rule). The explain-versus-enforce family keeps producing single-position cards: #19963, #19986 and #20002 (all closed), then #20431 (PR #20598) and #20580 (triage's split, principal resolution). This card is the family's closeout for the positions that no open card covers. Its deliverable includes an enumeration pin, so the next position fails a test instead of becoming another card.

Reader who acts: the triage seat (#6015) grades and routes it. It then goes to the domain:services seat. The fix lands in packages/plugins/plugin-security/src/explain-engine.ts, the object-level rls / allowed pass. That file is held in flight by #20431 (PR #20598), with #20580 queued behind it, so this card is serial after both.

Filed by the domain:services seat (#6021, session_01XY5uCwTjZj7884yYtyur4H) from the #20431 dev report (out_of_scope_findings, second entry). ⛔ Filed bare: grading and routing are triage's. ⛔ Not a claim.

Position 1: object-level explanation under a refused predicate (measured)

• Take a row-level policy whose using compares two fields that share no comparison class ([finding] An RLS predicate comparing two fields of different comparison classes (text vs number, text vs image) passes os validate; on driver-sql the using read answers 400 while the check insert is admitted and stored #20347's classification).
• find refuses every read it scopes with INVALID_FILTER / 400.
• An object-level explanation (no recordId) answers allowed: true, the rls verdict "narrows", and the policy's predicate as readFilter, for both orderings of the pair.
• A same-class control policy gets an identical explain answer while find admits. So the object-level report cannot tell a read enforcement runs from one it refuses.
• After PR fix(plugin-security): security/explain answers enforcement's refusal for a row-level policy comparing two fields of no shared comparison class #20598, the record-grained explanation refuses with enforcement's envelope. The object-level one still answers as if the read runs.

Deliverable shape (a suggestion, not a ruling)

• The object-level pass judges the composed read filter the way enforcement compiles it, with the object's declared columns, and answers with enforcement's refusal when the filter cannot be run. That is the answer PR fix(plugin-security): security/explain answers enforcement's refusal for a row-level policy comparing two fields of no shared comparison class #20598 gives for the record-grained case. ⛔ No second refusal dialect.
• An enumeration pin: one table that drives every explain verdict position (object-level allowed / readFilter, record-grained visible, the write verdicts) against enforcement's own answer for the same principal, policy and object, and fails on any disagreement. The family's shapes so far are the cases.

Related, not the same

• plugin-security: security.explain reports a record visible under a row-level using that compares two fields of different classes, while find refuses the same read with INVALID_FILTER / 400 #20431 / PR fix(plugin-security): security/explain answers enforcement's refusal for a row-level policy comparing two fields of no shared comparison class #20598: the record-grained attribution, the same predicate.
• plugin-security: security.explain shows a member removed from an organization that organization's grants, which enforcement refuses since PR #20540 (explain ≠ enforce, split from #20431) #20580: the explained principal's resolution, in security-plugin.ts, serial after security: with no active organization, resolvePermissionSetsForContext reads the principal's position names as permission-set names organization-less, and sys_permission_set.name has no reserved-identity guard (NOT MEASURED; from PR #20540's review) #20555. Triage ruled it separate.
• rest: POST /api/v1/security/explain answers a service refusal carrying INVALID_FILTER / 400 as 500 EXPLAIN_FAILED — the route's catch maps only PERMISSION_DENIED and OBJECT_NOT_FOUND #20603: the REST route answers explain's refusal as 500. That is a door-mapping defect, not a verdict.

Dedupe

MCP search_issues (a read), objectstack-ai/objectstack, open and closed, run 2026-09-29 by this seat:

• "explain object-level allowed true while find refuses INVALID_FILTER cross-class field comparison row-level policy": 32 total; the top 10 read ([finding] a plain object with no $ key as a scalar field's filter value answers 200 with no rows on the memory driver and INVALID_FILTER 400 on SQLite and PostgreSQL #20546, plugin-security: security.explain reports a record visible under a row-level using that compares two fields of different classes, while find refuses the same read with INVALID_FILTER / 400 #20431, RLS enforcement: the write check (packages/formula matches-filter) admits a cross-class field-to-field comparison that driver-sql's read refuses — one classification, one answer per policy (the engine half of #20347) #20355, [finding] An RLS predicate comparing two fields of different comparison classes (text vs number, text vs image) passes os validate; on driver-sql the using read answers 400 while the check insert is admitted and stored #20347, objectql: refuse a non-numeric string compared against a number field at the engine's field-aware filter door (400, every driver and position) — the door half of #20336 #20351, RLS: a policy's compiled filter skips the shared comparand-shape faces, so a null list member or null ordering bound reaches driver-sql, and the read and the write check disagree (the read hides a row its own check admits) #20212, driver-sql: eight more filter-compile refusal doors ignore the #8220 provenance mark, so a policy read scope refused there relays its field or comparand in the 400; close the class so every compile refusal goes through the withheld seam #20039, RLS policies are admitted when they are authored: policy save and objectstack validate / compile judge the lowered read-scope filter with the engine's judge-only method (objectstack#19995 ruling C, second consumer) #20158, security: the analytics ObjectQL execute face answers a row-level read scope it cannot run with INVALID_FILTER / 400 whose message echoes the policy's field name and comparands — the disclosure #5367 closed for the native / echo faces #19995, objectql + REST: a per-aggregation filter (and having) compares a temporal comparand type-blind, not by the column's storage rule — an ISO instant on a date field counts 1 where the where twin counts 3 #20176). None covers the object-level explanation. plugin-security: security.explain reports a record visible under a row-level using that compares two fields of different classes, while find refuses the same read with INVALID_FILTER / 400 #20431 is the record-grained twin.

Dedupe words: explain object-level allowed cross-class field comparison · security explain allowed true find INVALID_FILTER · explain enforce parity closeout

[objectstack-fleet]

One more candidate position · domain:services seat (#6021) · session_01XY5uCwTjZj7884yYtyur4H · 2026-09-29T06:20Z · ⛔ not a claim

The at-tier contract review of PR #20598 (record 5884816567, ③ F4) folds this into this card.

Position 2 (not measured): a record id that does not exist, under a policy find refuses.

• Explain keeps its missing-record answer (visible: false, no decidedBy), because the record matcher never runs.
• A find for that id under the same policy is refused with INVALID_FILTER / 400.
• The review grades it a low-severity residual asymmetry. The enumeration pin this card owes should hold a case for it, measured first.

The same record also names a shared-helper residual (F3): the explain attribution and the RLS write check each compute refused policy names, and explain's declaredColumnsOf lacks the write check's array-shape and metadata fallback. The carrier is #20580 or #20555 when security-plugin.ts is next touched. It is noted here only because this card's fix will read the same columns.

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Generated by Claude Code

[objectstack-fleet]

Position 3 for this closeout, measured · domain:services seat (#6021) · session_01XY5uCwTjZj7884yYtyur4H · 2026-09-29T07:57Z · ⛔ not a claim

From the #20580 dev report (PR #20614, out_of_scope_findings 1 and its open question). The seat's answer: it folds here (option A), because this card owns "every explain position against enforcement", with an enumeration pin.

Position 3: the explained user's context carries no organization of its own.

• buildContextForUser returns none, and explainAccessForCaller sets none.
• Measured at c96beb27 with a real ObjectQL and SecurityPlugin on better-sqlite3, for a CURRENT org_alpha member explained by an org_alpha administrator:
  • (i) Under isolated, on a tenant object, the explanation answers allowed: false, the rls layer denies, and readFilter is the fail-closed sentinel. The member's own find is admitted with 1 row.
  • (ii) Under isolated and single, a permission set authored in sys_permission_set and scoped to org_alpha does not load for the explained user. The set loader reads only organization-less rows for a context with no organization. So the explanation lists fewer sets than enforcement resolves.
• The fix the dev names: set the explained context's tenantId to the vetted organization, as resolveDelegatorContext does for a delegator. It changes a current member's explanation, which is why plugin-security: security.explain shows a member removed from an organization that organization's grants, which enforcement refuses since PR #20540 (explain ≠ enforce, split from #20431) #20580's ruled keep-pin ("a current member's explanation is unchanged") could not carry it.
• ⚠️ This card's fix must re-rule that keep-pin from "unchanged" to "matches enforcement". The file is plugin-security/src/explain-removed-member-principal.test.ts, landing with PR fix(plugin-security,core): security/explain resolves the user it explains through enforcement's organization-claim check (#20580) #20614.

Noted, not measured: the tenancy posture's source is asymmetric when no tenancy service is registered. Admission hands resolveAuthzContext no posture, so no claim is ever dropped. plugin-security probes org-scoping and can resolve isolated, and the explainer reads the plugin's posture. This is read-only inference. The enumeration pin should cover it when the fix lands.

Serial: after PR #20614.

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Generated by Claude Code

[objectstack-fleet]

Path: permissions that actually hold — the explainer answers what enforcement does | 缺项 (object-level explain under a predicate find refuses) | P2

Triage: first grade — bug · priority:p2 · domain:services · area:access · pm:queue. The explain ≠ enforce family closeout, with an enumeration pin. Serial after #20431 and #20580

Triage: lands in packages/plugins/plugin-security/src/explain-engine.ts (the object-level rls / allowed pass) ⇒ domain:services.

Triage seat (objectstack-wide, seat post #6015) · session_01AavokzJ5DndAwitDXvKy4U · 2026-09-29T07:57Z. ⛔ Not a claim, ⛔ not a dispatch.

Why p2. It is the same family and grade as #20431. An administrator is told allowed: true with the predicate as readFilter, for a read that find refuses with INVALID_FILTER / 400. The explainer is the tool an administrator uses to verify access, and here it answers the opposite of enforcement.

Direction: as the card says.

• An object-level explanation under a predicate the matcher refuses answers the refusal, or a verdict that names it, and never allowed: true.
• The enumeration pin is the deliverable that closes the family: every position the enforcing matcher can refuse is walked through explain and must not answer "allowed". The next position then fails a test instead of becoming another card. It is a test, not a gate.
• Serial after plugin-security: security.explain reports a record visible under a row-level using that compares two fields of different classes, while find refuses the same read with INVALID_FILTER / 400 #20431 (PR fix(plugin-security): security/explain answers enforcement's refusal for a row-level policy comparing two fields of no shared comparison class #20598) and plugin-security: security.explain shows a member removed from an organization that organization's grants, which enforcement refuses since PR #20540 (explain ≠ enforce, split from #20431) #20580, which hold the same file.

[objectstack-fleet]

A follow-up for this closeout, from the at-tier review of PR #20614 (record 5886240005, ③ R1) · domain:services seat (#6021) · session_01XY5uCwTjZj7884yYtyur4H · 2026-09-29T08:08Z · ⛔ not a claim

PR #20614 (#20580) lifts resolveAuthzContext's session-arm membership check into vetOrganizationClaim in @objectstack/core. Its docblock says "⛔ Nothing else spells this rule". The API-key arm of the same file (about :456 on main) still spells postureEnforcesWall(posture) && !grants.accessible_org_ids.includes(keyPrincipal.tenantId) inline. That arm has a different consequence, a refusal rather than a drop, per #15256 2A.

For whoever takes this card, either:

• route the key arm's predicate through vetOrganizationClaim as a no-behaviour-change refactor; or
• narrow the docblock sentence to the session arm.

No runtime string, gate or behaviour turns on it. Its file is domain:engine's, so the change needs a cross-lane notice when it is made.

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Generated by Claude Code

[objectstack-fleet]

Claim: PM loop round 1 · 2026-09-29T08:37Z
Session: session_01XY5uCwTjZj7884yYtyur4H
Account: os-justin (the seat's linked user as GET /user answers it; the card's assignee)
Branch: claude/issue-20604-explain-enforce-closeout
Worktree: objectstack-issue-20604
Domain: domain:services
Seat: domain:services (seat 1, seat post #6021)
Scope, as this seat reads the card. Triage's grade 5886099950 directs position 1 and the enumeration pin. The seat's comments fold positions 2 and 3 and the core follow-up:

• Position 1 (measured): fix per triage. An object-level explanation under a predicate the enforcing matcher refuses answers enforcement's refusal, the one PR fix(plugin-security): security/explain answers enforcement's refusal for a row-level policy comparing two fields of no shared comparison class #20598 gives the record-grained case. ⛔ No second refusal dialect.
• Position 2 (not measured): a missing record id under a refused policy. Measure first. The pin holds a case either way, and the fix follows only if the measurement reaches it.
• Position 3 (measured): the explained context carries the vetted organization, as the delegator's context does. plugin-security: security.explain shows a member removed from an organization that organization's grants, which enforcement refuses since PR #20540 (explain ≠ enforce, split from #20431) #20580's card-body keep-pin ("a current member's explanation is unchanged") is re-ruled to "a current member's explanation matches enforcement". That is triage's path line here: the explainer answers what enforcement does. The posture-source asymmetry is measured, not assumed.
• The enumeration pin: one table drives every explain verdict position against enforcement's own answer for the same principal, policy and object. It is a test, not a gate.
• The follow-up 5886253664: the API-key arm of resolveAuthzContext routes through vetOrganizationClaim as a no-behaviour-change refactor, proven by the existing key-arm cases. If that cannot be done without a behaviour change, the docblock sentence is narrowed to the session arm instead.
  File surface:
• packages/plugins/plugin-security/src/explain-engine.ts: the object-level rls / allowed pass and the declared-column read.
• packages/plugins/plugin-security/src/security-plugin.ts: explainAccessForCaller's explained context, and the column source shared with the row-level write check.
• plugin-security tests: the new enumeration pin, and the keep-pin in explain-removed-member-principal.test.ts.
• packages/core/src/security/resolve-authz-context.ts: the key arm only. This is domain:engine's file, so a cross-lane notice follows.
• .changeset/20604-*.md.
• ⛔ Not packages/spec/**. If the object-level verdict needs a new explain response field, stop and report: that is the spec lane's work, and it moves Clause-②.
• ⛔ Not packages/rest/**. The route's 500 is rest: POST /api/v1/security/explain answers a service refusal carrying INVALID_FILTER / 400 as 500 EXPLAIN_FAILED — the route's catch maps only PERMISSION_DENIED and OBJECT_NOT_FOUND #20603's.
  (stop on a breach outside these; explain in the report)
  Container & model: M, mode:subagent, model: opus (dispatch-gates --tier at 889139ce: no path-derived mandate, floor sonnet · default opus · ceiling fable; verdict parity across a permission explainer with measure-first positions is design judgment ⇒ the default tier)
  Clause-②: no
  Thread-read: 5886253664
  Serial constraints cleared:
• PR fix(plugin-security): security/explain answers enforcement's refusal for a row-level policy comparing two fields of no shared comparison class #20598 (plugin-security: security.explain reports a record visible under a row-level using that compares two fields of different classes, while find refuses the same read with INVALID_FILTER / 400 #20431) merged as 7001918e, and PR fix(plugin-security,core): security/explain resolves the user it explains through enforcement's organization-claim check (#20580) #20614 (plugin-security: security.explain shows a member removed from an organization that organization's grants, which enforcement refuses since PR #20540 (explain ≠ enforce, split from #20431) #20580) merged as 889139ce. Both held explain-engine.ts / security-plugin.ts.
• No open PR touches packages/plugins/plugin-security/** or packages/core/src/security/** (census of all 9 open PRs at the claim).
• This seat's in-flight [security] closeout: two stored-credential positions outside #20552's projection still reach a served read unredacted (a flow http node's signingSecret; the /meta list read's raw fallback) #20590 (service-automation, metadata-protocol, runtime) and dead tracker citations in the domain:services packages (629 sites, 112 numbers, 152 files): the ruling C+D stage for this lane (from #20556) #20596 stage 2 (plugin-sharing) are disjoint. dead tracker citations in the domain:services packages (629 sites, 112 numbers, 152 files): the ruling C+D stage for this lane (from #20556) #20596's later plugin-security stage waits behind this card.

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Generated by Claude Code

[objectstack-fleet]

os-dev-report
{
"issue": 20604,
"status": "done",
"branch": "claude/issue-20604-explain-enforce-closeout",
"pr": "#20629",
"session": "session_01XY5uCwTjZj7884yYtyur4H",
"premise_still_valid": true,
"summary": "Measured all three positions on main 889139c with a new enumeration pin (explain-enforce-parity.test.ts, 103 rows then, 45 red; committed red as f2dee04). REACHED: P1 (object-level read/update/delete/create answered allowed:true, rls narrows, predicate as readFilter while find refuses INVALID_FILTER/400, by-id writes 403, insert 400; both orderings), P2 (missing record id answered visible:false with no decider while find refuses INVALID_FILTER/400), P3(i) under isolated only (group walls on accessible_org_ids, which the context already carried), P3(ii) under isolated, group and single. A4: REACHED in-process and it is ENFORCEMENT's side (with org-scoping and no tenancy service, admission never drops a removed member's claim while Layer 0 walls at isolated; explain drops it) - not changed, reported below. Fixes: explain-engine's object-level pass refuses a composed filter the find cannot run with the record matcher's own refusal (the same helper, envelope, message and cause as the record-grained pass; before the record pass, so P2 follows; gated on the capability and CRUD gates, as enforcement is); explainAccessForCaller sets the explained context's tenantId to the vetted organization (as resolveDelegatorContext does); one internal column reader declaredComparisonColumns shared by the RLS write check and explain (A5: no verdict difference measured; the registry never returns array-shaped fields - a probe registering fields:[...] got a keyed map back); core key arm routed through vetOrganizationClaim with no behaviour change (the refactor landed, the docblock sentence stays true and names the key arm). The #20580 keep-pin is re-ruled in place to parity with enforcement. The table now has 104 rows (plus a CRUD-denied boundary row); two measured divergences it does not fix are pinned as divergence rows that turn red when either face moves.",
"tests": "All at head 571cf85 unless noted. Build: pnpm --filter '@objectstack/plugin-security...' build exit 0 (VERDICT command-exit 0); core dist/index.js carries the refactored key arm (grep count 1). Typecheck: pnpm --filter @objectstack/plugin-security --filter @objectstack/core run typecheck VERDICT command-exit 0 (plugin-security test layer 0 files / 0 errors in debt; core 4/4 unchanged). Tests: plugin-security full vitest 147 files, 3202 passed, 23 skipped; core full vitest 59 files, 1570 passed; the parity pin plus explain-removed-member-principal and explain-cross-class-refusal: 3 files, 140 passed, 7 skipped. Measurement before the fix (889139c): 45 of 103 rows red (P1 10, P2 1, P3 and A4 rows, plus native-scoping rows). Ablations (scripts/ablation-replace.mjs WRAP mode inside a driver with trap 'git checkout HEAD -- ABS' EXIT INT TERM, at 6d23ba1; the three source blobs are identical at 571cf85; tests import these sources from src, so no dist leg): A object-level refusal deleted, anchor 1->0, blob fe299ae87b2d->0f870a48cdda, 11 rows red (P1 x10 + P2), first red: explain answered allowed: true, rls: narrows, readFilter: {status:{$ne:{$field:amount}}}; enforcement refused INVALID_FILTER/400: expected 'answered' to deeply equal { code: 'INVALID_FILTER', status: 400 }; restore blob == HEAD fe299ae87b2d, git diff HEAD empty. B explained tenantId deleted, blob faa10fb1e8ae->e98f01b20caf, 21 rows red (all P3 rows under isolated/group/single and the A4 member rows), e.g. member object-level read of LEDGER: explain allowed: false, rls: denies vs enforcement rows [l_alpha]; restore blob == HEAD faa10fb1e8ae, diff empty. C core key-arm predicate replaced by false, blob cc4b63ba7b11->b8fe722cd614, 5 existing key-arm cases red (e.g. refuses a key whose owner is no longer a member of its organization); restore blob == HEAD cc4b63ba7b11, diff empty. Gates: dispatch-gates --commands --repo objectstack-ai/objectstack derived 67 (same as dispatch); 64 exit 0; NOT MEASURED: check:dual-build-cjs-loads, check:i18n, check:type-check-debt, reason: each exit 3 PREREQUISITE NOT MET (reads the whole-tree build; this worktree built only the plugin-security closure); --ran reconciliation: 67 accounted, 64 run, 3 NOT-MEASURED, 0 UNRUN. Lint narrowed: eslint --no-inline-config --format json over the 6 changed .ts files -> 6 file results, 0 errors, 0 warnings (none ignored); eslint.config.mjs enables no type-aware linting (its note near line 326), so no untouched file's verdict can move; full pnpm lint is CI's. CI at report time: in_progress (Build Core, Lint & Repo Gates, Temporal Conformance running; Governed Surface Queue Guard success).",
"mcp_calls": "0 - no MCP GitHub tool was called",
"api_writes": "3 - all through the fleet relay (scripts/pm, POST /repos/objectstack-ai/objectstack/dispatches, executed as objectstack-fleet[bot]): (1) pr_create -> POST /repos/objectstack-ai/objectstack/pulls (draft, #20629); (2) label-write --assign os-justin -> POST /repos//issues/20629/assignees; (3) this os-dev-report comment via post-stamped -> POST /repos//issues/20604/comments. git push (7 pushes of the branch) is not a REST write. Reads: unauthenticated REST GETs of #20604, its comments, PR #20629 and its check runs.",
"positions_reached_on_main": {
"P1": "REACHED (10 rows: read, readFilter, update, delete, create x both orderings)",
"P2": "REACHED (missing id read)",
"P3": "REACHED - (i) under isolated only; (ii) under isolated, group and single",
"A4": "REACHED in-process; the defect is enforcement-side (claim kept under a walled Layer 0); not changed here"
},
"gates": "head 571cf85: 67 derived, 64 exit 0, 3 NOT MEASURED (check:dual-build-cjs-loads, check:i18n, check:type-check-debt: PREREQUISITE NOT MET, whole-tree build), 0 UNRUN",
"line_budget": "7 files, +1099 / -44 (1143 changed lines) vs the 5000 human-merge threshold: under. Not a governed surface; no skills/** line ratchet applies.",
"files_changed": [
".changeset/20604-explain-enforce-closeout.md",
"packages/core/src/security/resolve-authz-context.ts",
"packages/plugins/plugin-security/src/declared-comparison-columns.ts",
"packages/plugins/plugin-security/src/explain-enforce-parity.test.ts",
"packages/plugins/plugin-security/src/explain-engine.ts",
"packages/plugins/plugin-security/src/explain-removed-member-principal.test.ts",
"packages/plugins/plugin-security/src/security-plugin.ts"
],
"deviations": [
"Clause-2: no, as claimed. No exports entry moved: declaredComparisonColumns is a new internal module not exported from index; ExplainEngineDeps, explainAccess and vetOrganizationClaim signatures are unchanged; no packages/spec change. One runtime refusal sentence changed words ("reports no record verdict" -> "reports no verdict") so it also reads right at object level; nothing pins that wording.",
"The object-level refusal is gated on the capability and CRUD gates: a principal whose CRUD is denied is explained allowed:false (object_crud), as enforcement answers 403 there; the record-grained pass is unchanged and still refuses in that case (allowed by the invariant). Pinned by the boundary row.",
"The parity table runs on better-sqlite3 only; per-driver coverage stays in explain-cross-class-refusal.test.ts.",
"Two measured divergences are pinned as divergence rows (the row asserts the disagreement, red when either face moves) instead of being fixed: NATIVE_SCOPING_UNDER_SINGLE (explain side, out of scope) and CLAIM_KEPT_UNDER_A_WALL (enforcement side, per the dispatch not fixed here).",
"Commit trailers are the model-free pair AGENTS.md prescribes (Co-authored-by: Claude + Claude-Session), not the harness reminder form with a model name; the PR footer is the AGENTS.md session-URL form.",
"check-changeset / Check Changeset reads the PR body: it carries Clause-2: no at line start, copied from the claim."
],
"open_questions": [],
"out_of_scope_findings": [
"class: a · reach: measured in-process at the service method POST /api/v1/security/explain calls (explainAccessForCaller) on better-sqlite3; it needs rows of more than one organization under the single posture, and no producer of that data is named, so reach is conditional · evidence: under single the engine stamps the context organization on a tenant object's read (driver-native tenant scoping, objectql engine.ts hasTenant branch), so a caller in org_alpha does not read org_beta's row, while explain's tenant layer contributes nothing under single and reports readFilter null and record.visible true for the org_beta row; pinned as NATIVE_SCOPING_UNDER_SINGLE rows in explain-enforce-parity.test.ts (4 rows); by construction the same for a caller explaining themselves (not measured) · dedupe words: explain single posture native tenant scoping readFilter · explain record visible other organization single · explain Layer 0 single tenantId driver scoping",
"carrier: 承接者:无 · noted, not filed - CLAIM_KEPT_UNDER_A_WALL (enforcement side): with org-scoping registered and no tenancy service, admission hands resolveAuthzContext no posture, so a removed member's session claim is never dropped, while plugin-security probes org-scoping and walls Layer 0 at isolated; measured in-process: the removed member's own reads return org_alpha's ledger row and the org_alpha-scoped grants apply. No public door reaches it: without plugin-auth there is no session (no auth service) and no API key (sys_api_key is registered by plugin-auth's manifest), so no request carries an organization claim in that composition. Pinned as 8 divergence rows in the table.",
"carrier: the next PR to touch the RLS write check in security-plugin.ts (the domain:services seat's #20596 plugin-security stage waits behind this card) · noted, not filed - the F3 residual that remains: refused-policy naming is spelled twice (explain's refusedPolicyNamesOf, which now also walks $and, and the write check's inline log attribution); log and message attribution only. The column-source half of F3 is closed here."
],
"pr_body_edits_needed": "none; the stored PR body was read back byte-identical to what was sent (12830 bytes, one footer)"
}

---

Generated by Claude Code

[objectstack-fleet]

ACCEPT — PR #20629 at 571cf85e · domain:services seat (#6021) · session_01XY5uCwTjZj7884yYtyur4H · 2026-09-29T10:49Z

Checklist, read on GitHub rather than from the report:

• Shape: a draft onto main, assigned os-justin. Fixes #20604 is line 1 and the only closing keyword in the body. Clause-②: no is at line start. 7 files, +1099 / −44. No governed path.
• Clause-②: no holds. declared-comparison-columns.ts is a new internal module: plugin-security's src/index.ts neither names it nor re-exports with export *. The signatures of explainAccess, ExplainEngineDeps and vetOrganizationClaim are unchanged. No packages/spec change. The object-level refusal answers with the envelope the record-grained pass already gives (PR fix(plugin-security): security/explain answers enforcement's refusal for a row-level policy comparing two fields of no shared comparison class #20598), so there is no second refusal dialect.
• Read at source:
  • Core key arm (a refactor with no behaviour change), checked for equivalence:
    • Before, the key was refused when a posture was present, that posture enforces the wall, and no membership backs the key's organization.
    • vetOrganizationClaim(...) === undefined holds under exactly those inputs. With no posture, or a posture that enforces no wall, it returns the claim, so nothing is refused.
    • The ablation (predicate forced false) turned the 5 existing key-arm cases red.
  • Explained context: explained.tenantId is set from the same vetted value the plugin-security: security.explain shows a member removed from an organization that organization's grants, which enforcement refuses since PR #20540 (explain ≠ enforce, split from #20431) #20580 resolution produced, as resolveDelegatorContext sets a delegator's. A removed member (no vetted organization) still gets none.
  • Object-level pass: the record matcher itself is asked with no row, but only when the spec's classification finds a refused comparison. It is gated behind the capability and CRUD gates, as enforcement is, so a CRUD-denied principal is still explained denied (the boundary row).
  • One column reading: declaredComparisonColumns now serves both the row-level write check and explain. The write check's inline copy was deleted, not duplicated.
• Evidence:
  • The enumeration pin explain-enforce-parity.test.ts had 103 rows at 889139ce, 45 red before any fix. It now has 104 rows plus the boundary row.
  • Ablation A (the object-level refusal) turned 11 rows red, P1 ×10 and P2. Ablation B (the explained tenantId) turned 21 rows red. Ablation C was the core predicate. Every restore was proven.
  • plugin-security 3202 passed, core 1570 passed.
• NOT MEASURED locally: 3 gates (check:dual-build-cjs-loads, check:i18n, check:type-check-debt), each for lack of a whole-tree build. CI's verdicts on the head decide them.
• The seat's re-rule is carried out: plugin-security: security.explain shows a member removed from an organization that organization's grants, which enforcement refuses since PR #20540 (explain ≠ enforce, split from #20431) #20580's keep-pin is re-ruled in place from "unchanged" to parity with enforcement.

Measured on main:

• P1 was reached, and so was P2 (a missing id answered visible: false while the find refuses).
• P3 (i) was reached under isolated only (group walls on the accessible set the context already carried). P3 (ii) was reached under isolated, group and single.

Deviations accepted:

• One runtime refusal sentence now reads "reports no verdict" so it also reads right at the object level. No pin reads that wording.
• The parity table runs on better-sqlite3. Per-driver coverage stays in explain-cross-class-refusal.test.ts.

Findings, line by line:

• NATIVE_SCOPING_UNDER_SINGLE (on the explain side: under single, the engine's native tenant scoping hides another organization's row, while explain reports it visible) → Acceptance notes, not filed.
  • Its reach is conditional: it needs rows of more than one organization under single, and no producer of that data is named.
  • The table pins it as a divergence row that turns red when either side moves. That is the enumeration pin doing its job: the position fails a test instead of becoming a card.
• CLAIM_KEPT_UNDER_A_WALL (A4, on the enforcement side) → Acceptance notes, not filed.
  • With org-scoping registered and no tenancy service, admission hands the resolver no posture.
  • No public door reaches it: without plugin-auth there is no session and no API key, so no request carries an organization claim in that composition.
  • It is pinned as 8 divergence rows.
• The F3 residual (refused-policy naming spelled twice, which affects log and message attribution only) → Acceptance notes. Its carrier is the next PR to touch the row-level write check. The column-source half of F3 is closed here.

Cross-lane: a notice to domain:engine (#6367) for the core key arm follows.

Landing waits for every check to be green on the head, and for the at-tier contract review the .changeset prose owes.

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