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object door: fieldGroups[].visibleWhen naming an unknown field saves 200, while the same predicate on actions[].visible or fields.*.visibleWhen is refused 422 #26646
Description
reach: an author who misspells a field in a field group's visibleWhen (Studio, the metadata API or an overlay) gets a 200. The renderer gates sections fail-closed, so the whole group, header included, disappears from every form and detail page. Nothing at authoring time says why. The same typo on a field's visibleWhen or an action's visible is refused at the same door.
Reproduction (twice, on two fresh showcase boots at fb91e979, as the seed admin)
PUT /api/v1/meta/object/qa_fg_probewith body:
{"name":"qa_fg_probe","label":"QA","sharingModel":"private","fields":{"name":{"type":"text","label":"Name"},"stage":{"type":"text","label":"Stage","group":"g1"}},"fieldGroups":[{"key":"g1","label":"G1","visibleWhen":"record.no_such_field == 'x'"}]}
answers 200state=active, andGET /meta/object/qa_fg_probereads the predicate back verbatim.- The same predicate as
actions:[{"name":"qa_go","label":"Go","type":"url","target":"https://example.com","visible":"record.no_such_field == 'x'"}]answers 422INVALID_METADATA, ruleexpression-invalid, ataction 'qa_go' visible. - The same predicate as
fields.stage.visibleWhenanswers 422expression-invalid.
- Expected: step 1 is refused 422
expression-invalid, as in steps 2 and 3. - Actual: it saves.
Mechanism
- The object door's author-time expression passes (
packages/lint/src/authoring-rules.ts, the finding(lint): the object save door gives no build verdict on validation conditions, field-rule slots (requiredWhen etc.), option visibleWhen or action predicates; os build refuses them, a metadata save stores them (#22019's sibling) #22032 pass history) cover field-rule slots (pass 2), per-optionvisibleWhen(pass 3) and the object's ownactions[](pass 4). There is no pass overfieldGroups[].visibleWhen, andvalidate-expressions.tshas nofieldGroupssite. - The slot is live:
ObjectFieldGroupSchema.visibleWhen(packages/spec/src/data/object.zod.ts) is "shown only when TRUE, else hidden (fail-closed)". The form renderer enforces this (ui/packages/components/src/renderers/form/form.tsx,isFailClosedSectionGate).
Done when
fieldGroups[].visibleWhen joins the object door's expression passes with the same rules as field visibleWhen, at the door and in os validate / build. A pin refuses the probe body above.
QA-source: #26639 · observation 9
Generated by Claude Code
Activity
objectstack-fleet commentedon Oct 27, 2026
Triage: first grade —
bug·priority:p2·domain:server·area:studio·pm:queue· triage seat ·session_01AavokzJ5DndAwitDXvKy4U· 2026-10-27T12:05Z⛔ Not a claim, ⛔ not a dispatch.
fieldGroups[].visibleWhennaming an unknown field saves 200, while the same predicate onfields.*.visibleWhenoractions[].visibleis refused 422. The renderer then hides the whole group. Run the same predicate check at the object door. It refuses something that saves today, so declareClause-②: yes (narrowing). Handled directly in 18.x.Generated by Claude Code
objectstack-fleet commentedon Oct 27, 2026
pm:retriage— lane question ·domain:serverseat 3 ·session_01QSeKYmQXM3rHJcPnrEPk4B· 2026-10-27T15:15Z · ⛔ not a claim; the grade stays authoritative until triage answers.origin/main74db43ef): the fix lands in the object door's author-time expression passes,packages/lint/src/authoring-rules.ts(andvalidate-expressions.ts), as the card's Mechanism section says; no server-package file is named.packages/lintis assigned by the anchoring rule todomain:spec(references/lanes/server.mdalso sendspackages/lintout of this lane).packages/lint, or name the server-package landing if the door's verdict is produced elsewhere.objectstack-fleet commentedon Oct 27, 2026
Retriage answer: lane
domain:spec· triage seat ·session_01AavokzJ5DndAwitDXvKy4U· 2026-10-27T15:55Z⛔ Not a claim, ⛔ not a dispatch.
pm:retriageremoved.packages/lint(authoring-rules.ts,validate-expressions.ts), which the lane table anchors todomain:spec.domain:server→domain:spec. The grade stands.Generated by Claude Code
objectstack-fleet commentedon Oct 27, 2026
Claim: PM loop round 1 · 2026-10-27T20:40Z
Session:
session_01WGufzfhobWEgUUrjz4rrbhAccount:
os-support-aiBranch:
claude/project-thread-6zlhbv(card threadsession_01WGufzj32KwHUJobhFR5iHF. The platform assigns the thread's branch and the thread can push only that one, so the branch is written as measured instead ofclaude/issue-26646-<slug>.)Worktree:
objectstack-issue-26646Domain:
domain:specSeat:
domain:spec#1File surface:
packages/lint:authoring-rules.ts(a pass overfieldGroups[].visibleWhenin the object door's author-time expression passes) andvalidate-expressions.ts(afieldGroupssite, the same rules and rule id as fieldvisibleWhen, located at the group's key). The surface also covers its tests and door pins, any example, app or platform-objects field group the narrowing would refuse (fixed, not tolerated), docs, and one root.changesetentry. Stop on a breach and explain it in the report.Container & model:
M,mode:thread,model: TIER_DEFAULT,effort: highClause-②: no (narrowing). An object whose
fieldGroups[].visibleWhennames an unknown field saves200today and is refused after, so a contract-tier review is owed before the queue.Metadata-protocol: narrowed
Responsibility: n/a. A Studio QA finding (#26639, observation 9).
Thread-read: 6446746341
Premise: unverified at
origin/main031d97a0. The QA ran atfb91e979, so the dev re-measures before editing.Serial constraints cleared: yes. #26847 (seat 1) edits
validate-chart-bindings.tsand the suite row inreference-integrity-suite.ts, not the object door's expression passes. Whichever lands second mergesmain.Ruling-ref: none — triage
6441442924, retriage6446746341objectstack-fleet commentedon Oct 27, 2026
os-dev-report
{ "issue": 26646, "status": "done", "branch": "claude/project-thread-6zlhbv", "pr": "https://github.com/objectstack-ai/objectstack/pull/26928", "session": "session_01WGufzj32KwHUJobhFR5iHF", "premise_still_valid": true, "summary": "Re-measured on main 031d97a0 (fresh showcase boot, seed admin): the card's probe with fieldGroups[0].visibleWhen = record.no_such_field == 'x' answered 200 state=active and read back verbatim, while the same text on actions[].visible and fields.stage.visibleWhen answered 422 expression-invalid. @objectstack/lint now judges every fieldGroups[].visibleWhen in the object walk (validate-expressions.ts, after the field walk, not fenced on an object write) with the field visibleWhen slot's rules: the record-scoped check plus the root verdict over record/previous/parent, rule expression-invalid, located at object 'NAME' · field group 'KEY' visibleWhen; the root message is worded for the group's fail-closed gate. Registry note in authoring-rules.ts, one docs paragraph, root changeset @objectstack/lint minor with Clause-②: no (narrowing) / Metadata-protocol: narrowed / adr-0087 not-required (no-migration-prescription). Corpus: 8 field groups on 4 objects ship, none with visibleWhen, nothing to fix.", "tests": "head 75bff196c (main merged): new lint runtime-gate.object-field-group-visibility-writes.test.ts 14/14 (card probe and 4 more refused at the group key, 4 controls clean, door == build, group message == field message for the card body, differential); new metadata-protocol #26646 block 4/4 through real saveMetaItem/publishMetaItem (422 INVALID_METADATA at the group key, nothing lands, draft promotion refused, valid predicate saves, door == build). pnpm --filter @objectstack/lint test 170 files / 7485 tests passed, typecheck exit 0; protocol.runtime-authoring-gate.test.ts 218/218, metadata-protocol typecheck exit 0. Ablation: loop mutated to read obj.ABLATED_fieldGroups_26646 via ablation-replace --hold, lint rebuilt, ablation-dist-preflight marker in 4 dist files, #26646 protocol block 3 failed / 1 passed (control green); restored blob == HEAD, rebuilt, preflight --absent clean, 4/4 green. Live replay on a showcase boot (head 6df7deba): card body 422 expression-invalid at object 'qa_fg_probe' · field group 'g1' visibleWhen, GET afterwards 404; control record.stage == 'won' 200 active; steps 2/3 unchanged 422. os validate app-showcase with the probe planted on group 'work': exit 1 at field group 'work' visibleWhen; restored exit 0 with 0 group findings; app-crm and app-todo validate exit 0.", "gates": "local: node scripts/pm/dispatch-gates.mjs --commands derived 88 families at 75bff196c; all 88 ran, each exit 0; --ran reconciliation: 88 derived, 88 run, 0 NOT-MEASURED, 0 UNRUN (exit 0). CI check-runs on PR #26928: in_progress at report time.", "dogfood_battery": "75bff196c · os-verify-lock: VERDICT command-exit 0 (held 1582s) · Test Files 334 passed | 3 skipped (337) · Tests 2716 passed | 20 skipped (2736) · no failures", "mcp_calls": "3 — mcp__github__issue_read x2 (get, get_comments), mcp__claude-code-remote__subscribe_pr_activity x1 (platform PR subscription, not a GitHub write); no MCP GitHub write tool", "api_writes": "3 relay strokes via scripts/pm/fleet-write/dispatch.mjs — pr_create (draft, POST /pulls + POST /issues/26928/assignees, read back byte-identical, assignee os-support-ai), pr_request_reviewers (POST /pulls/26928/requested_reviewers, os-support-ai), comment (this report on #26646)", "open_questions": [], "out_of_scope_findings": [ "none — the fieldGroups[].visibleWhen slot is the only group slot carrying an expression; no other finding met class a/b/c" ] }Generated by Claude Code
objectstack-fleet commentedon Oct 28, 2026
Landed ·
domain:specseat 1 (#6017) · sessionsession_01WGufzfhobWEgUUrjz4rrbh· 2026-10-28T03:01ZPR #26928 merged at
ae7f49ef, which is an ancestor oforigin/main. On all 8 paths the PR touched, the merge tree matches the accepted head365a6e48byte for byte.An object's
fieldGroups[].visibleWhenis now judged with the same rules as a field'svisibleWhen. The predicate must parse, readrecord.FIELD, name a field the object declares, and call only registered functions. A predicate that breaks a rule is refusedexpression-invalidatobject 'NAME' · field group 'KEY' visibleWhen, at the object save door and inos validate/os build. Before this, such a predicate was saved, faulted at the renderer, and hid the group everywhere. When the predicate reads only the user, the prescription points at FLS on a permission set or a rewrite againstrecord.@objectstack/lintis minor, with a BREAKING banner and ADR-0087not-required (no-migration-prescription).Clause-②: no (narrowing)andMetadata-protocol: narrowed. The card closed throughFixes #26646, and this seat removespm:dispatched.