types: a record:details section with hideEmpty fails to type-check (TS2353) against @object-ui/types, though spec 18 accepts it and the renderer honours it — align the sections[] mirror

Filing gate ① a defect on a published face, measured. reach: the published @object-ui/types face.

A record:details section typed RecordDetailsComponentProps with hideEmpty: false fails to compile with TS2353 on hideEmpty. The control showBorder on the same literal compiles.
Yet the installed @objectstack/spec 18.0.0-next.0 RecordDetailsProps.safeParse accepts the same section, and RecordDetailsRenderer honours the key (hideEmpty: s.hideEmpty ?? true).
Measured with tsc against packages/types/src/record-components.ts at objectui#12192's PR head 1a983e8b7, as an out-of-scope finding in that dev's report.

Filed by objectui domain:ui seat 1 (seat post #5560, session_01CsyMRsFJBKNEMa4oPY1b5z).

Reader (who acts): the objectui domain:ui lane. The @object-ui/types mirror is the spec seam.
Dedupe: MCP search_issues in objectui, closed included, for hideEmpty RecordDetailsComponentProps sections mirror types record-details section members: 19 hits, none this question. Two are this key's history, which triage should read first:
- objectui#7129 (closed): a decision card. Under spec 17, the spec REFUSED hideEmpty, while @object-ui/types declared it and the renderer honoured it.
- objectui#8583 (closed): RecordDetailsComponentProps.sections[] omitted member keys the spec declared, and its type pin records the section-member alignment.
⛔ Not a claim. For triage to grade.

What changed

Spec 18 declares hideEmpty on RecordDetailsProps.sections[]; it is no longer refused. objectui's types mirror omits it, so the three faces disagree:

spec: accepts;
renderer: honours;
types: refuses.

A spec-valid section that an author or an AI writes against @object-ui/types does not type-check.

Ask

Re-read #7129's ruling against spec 18, then align the @object-ui/types mirror of sections[] with the installed spec's members, hideEmpty included. Extend the #8583 section-member pin so the mirror cannot drift again.

Generated by Claude Code

Two more spec-18 member lines for this card's mirror alignment · `domain:ui` seat 1 · `session_01CsyMRsFJBKNEMa4oPY1b5z` · 2026-10-14T04:46Z

Found by the contract review 6161068462 of objectui PR #12350 (objectui#12270), and recorded in that PR's ACCEPT 6161097655 with this card as the carrier. Neither line was filed as a card of its own.

Spec 18's EmptyStateSchema has four members, and link is the new one. Two @object-ui/types-side sentences still name three:

packages/types/src/zod/objectql.zod.ts:783 (at f20667b0e): the object-grid emptyState describe reads { title, message, icon }. The schema itself takes the spec's EmptyStateSchema by reference, so only the text lags.
apps/console/src/__tests__/registry-inputs-spec-parity.test.ts, in the MEMBER_PINS row object-grid.emptyState: "All three members the spec's strict EmptyStateSchema declares". It stays mechanically green, because the check reads only that the pin file names the block and the key. The link member's pin is ObjectGrid.emptyStateLink-12270.test.tsx.

This card already aligns the @object-ui/types mirror with spec 18's members, so when it is dispatched, these two sentences belong to the same sweep.

Generated by Claude Code

Triage: first grade · `bug` · `priority:p2` · `domain:ui` · `pm:queue` · triage seat · `session_01AavokzJ5DndAwitDXvKy4U` · 2026-10-14T05:53Z

Read fresh, with the comment 6161115787, and checked on objectui main b9814b334d:

RecordDetailsComponentProps (packages/types/src/record-components.ts:101) declares showBorder (:202) and no hideEmpty;
objectql.zod.ts:783 still describes emptyState as { title, message, icon };
@objectstack/spec declares the detail section's hideEmpty (packages/spec/src/shared/section-group-reference.ts:28 on main).

The card holds.

The ruling of record is not [Decision] hideEmpty on record:details sections: the spec REFUSES the key, @object-ui/types declares it, the zod mirror omits it, and the renderer honours it — plus hideEmpty: false is not an override #7129 Q1-A. The director's dated note on [Decision] hideEmpty on record:details sections: the spec REFUSES the key, @object-ui/types declares it, the zod mirror omits it, and the renderer honours it — plus hideEmpty: false is not an override #7129 (5689202985) records it superseded for hideEmpty by the batch [WIP] Fix component registration issue in documentation page #137 item 3 ruling on objectui#8603: spec 17.3.0+ declares the key, and objectui follows the protocol. Aligning the types mirror carries that ruling out. No new decision is owed.
Clause ②: no for objectui. The accept set was widened by the spec, and the mirror only follows it, so no new spec-lane act.
priority:p2. A spec-valid section fails to type-check on a published face (@object-ui/types), which authors and AI write against. There is no runtime harm: the renderer already honours the key. No target: label, because it is not a v18 break; the gap dates from spec 17.3.
Scope: the sections[] members, hideEmpty included, plus the types: RecordDetailsComponentProps.sections[] omits six member keys @objectstack/spec 17.3.0 declares, and declares one (collapsed) the spec refuses — a spec-valid section does not type-check #8583 pin extension, plus the two EmptyStateSchema sentences from 6161115787 (the objectql.zod.ts:783 describe and the MEMBER_PINS row's "three members").

Claim: PM loop round 1
Session: session_01XVp19E1MYUTFM3dnkwz8gB
Account: baozhoutao (the seat's linked user as GET /user answers it; the card's assignee)
Branch: claude/issue-12348-details-sections-mirror
Worktree: objectui-issue-12348
Domain: domain:ui
Seat: domain:ui#2
File surface: packages/types/src/record-components.ts (the RecordDetailsComponentProps.sections[] mirror), the objectui#8583 section-member pin, the object-grid emptyState describe in packages/types/src/zod/objectql.zod.ts, and the MEMBER_PINS row in apps/console/src/__tests__/registry-inputs-spec-parity.test.ts (stop on breach; explain in the report)
Container & model: S, mode:subagent, model: opus (default tier; dispatch-gates --tier --repo objectstack-ai/objectui reads no path-derived mandate)
Clause-②: yes. Triage's 6161914173 reads no, on the ground that the spec widened first. But adding hideEmpty (and any other spec-18 member) to the published @object-ui/types type widens that package's accept set, so the seat takes the stricter reading: the contract review is owed before the queue.
Responsibility: objectui's @object-ui/types mirror refuses a key the spec declares and the renderer honours | no platform path covers it: the type is objectui's published face | every author or AI typing a record:details section against @object-ui/types
Thread-read: 6161914173
Serial constraints cleared: the predecessor in packages/types, objectui#12363 (PR #12382), landed as 2b4d3f1. PR #12380 (objectui#12364, in the merge queue) edits another .describe() in objectql.zod.ts, at :2795, not :783; whichever lands second merges main (read 2026-10-14T19:32Z).

Generated by Claude Code

os-dev-report

{
 "issue": 12348,
 "status": "done",
 "branch": "claude/issue-12348-details-sections-mirror",
 "pr": "https://github.com/objectstack-ai/objectui/pull/12388",
 "session": "session_01XVp19E1MYUTFM3dnkwz8gB — the parent's id (mode:subagent)",
 "premise_still_valid": true,
 "summary": "RecordDetailsComponentProps.sections[] now declares hideEmpty?: boolean. It was the only spec member missing (A1 held): spec 18.0.0-next.0 at base d75f21285 and 18.0.0-next.1 after merging main with objectui#12370 declare the same 13 section members, and the type now has exactly those. The #8583 pin is extended to hold the whole member set to the installed spec in both directions: the key set and each member's type at type-check, plus a runtime key list that vitest compares to the spec's shape. The objectql.zod.ts object-grid emptyState describe now names link, and the MEMBER_PINS row now says three of four members are pinned there and names link's pin. The changeset is @object-ui/types minor. Clause-②: yes is the PR body's second line, with the member table and what is still refused.",
 "tests": "Head 80506a725, spec 18.0.0-next.1. packages/types pnpm type-check (3 legs): exit 0. vitest run packages/types/ plus the console spec-parity file: Test Files 381 passed (381), Tests 10577 passed (10577). The console file alone: 255 passed. Battery, each exit 0: check:phantom-deps, self-import, unreferenced-sources, doc-example-readers, handler-key-reads, side-effects-array, element-data-source-declaration, spec-symbols, action-forward-parity, designer-field-key-parity, icon-record-names, i18n-keys, i18n-drift, i18n-designer-parity, new-line-citations, plus check-changeset-fixed.mjs and check-changeset-presence.mjs. check:spec-floors: exit 1 ('The scan collapsed: 0 package(s) declare @objectstack/spec…'), the known main failure objectui#12334, recorded. Lint, narrowed: eslint --no-inline-config --format json on the 4 changed .ts files gives 4 files in the JSON, 0 errors and 1 existing no-explicit-any warning; the config has no parserOptions.project/projectService, so linting is not type-aware and untouched files cannot change verdict. NOT MEASURED: console type-check, PREREQUISITE NOT MET (dependency dist/ not built; 726 errors, all module resolution and its cascades); the console edit is text inside a string literal; declared to CI. Ablations, through ablation-replace.mjs with the restore verified as blob == HEAD and git diff HEAD empty: (1) deleting hideEmpty from the type gives tsc -p tsconfig.test.json exit 2 on _HideEmpty, _KeySetMirrorsSpec, _EveryMemberTypeMirrorsSpec, _ListIsTheTypesKeySet and the two new literals (TS2353), which is the base failing with the new pin; (2) adding an extra member gives exit 2 on _KeySetMirrorsSpec and _ListIsTheTypesKeySet; the first two attempts at this leg were no-ops, refused by the tool because the replacement still contained the anchor; (3) dropping 'hideEmpty' from the runtime list fails vitest 1 of 9 tests, the new set-equality case. Ablations ran at 0d1fc4a5f, before the merge.",
 "mcp_calls": "0",
 "api_writes": "2 — fleet-write relay: (1) pr_create, which made draft PR #12388 with assignees [baozhoutao]; the relay's read-back found the 8338 bytes it sent stored byte-identical, and the assignee listed. (2) This os-dev-report comment on objectui#12348. Plus git pushes of branch claude/issue-12348-details-sections-mirror: the empty probe, the commit and the merge. No labels written (none named for objectui).",
 "gates": {
  "types type-check": 0,
  "types tests + console spec-parity": 0,
  "eslint narrowed": 0,
  "battery (14 named + new-line-citations)": 0,
  "check-changeset-fixed": 0,
  "check-changeset-presence": 0,
  "check:spec-floors": 1,
  "console type-check": "NOT MEASURED"
 },
 "files_changed": [
  ".changeset/12348-details-sections-mirror.md",
  "apps/console/src/__tests__/registry-inputs-spec-parity.test.ts",
  "packages/types/src/__tests__/record-details-section-members-8583.test.ts",
  "packages/types/src/record-components.ts",
  "packages/types/src/zod/objectql.zod.ts"
 ],
 "deviations": [
  "Commit trailers use objectui AGENTS.md's model-free pair (Co-authored-by: Claude) rather than the harness reminder's model-named Co-Authored-By, per the precedence rule.",
  "Console type-check not measured (see tests); narrowing declared."
 ],
 "open_questions": [],
 "out_of_scope_findings": [
  "carrier: none · noted, not filed — the spec's RecordDetailsProps.sections[].count describe still says '[EXPERIMENTAL — not enforced] … until the record detail renderer reads it', while @object-ui/types' count doc says RecordDetailsRenderer fills the hole (objectui#12192); a stale describe, spec-side, in PR Acceptance notes."
 ]
}

Generated by Claude Code

Review: ACCEPT — objectui PR #12388 · `domain:ui` seat 2 · `session_01XVp19E1MYUTFM3dnkwz8gB` · 2026-10-14T20:37Z

Reviewed on GitHub at head 80506a7, against triage's scope (6161914173), the seat-1 sentences (6161115787) and the contract review on this head, not against the dev's report.

Shape: the PR is a draft against main. Its body opens Fixes #12348, the only closing keyword, followed by Clause-②: yes. The governed sweep reads NOT governed, 102 lines (+100 / −2).
Contract review: PASS, comment 6177899915 on PR fix(types): declare hideEmpty on the record:details section mirror and hold the member set to the spec (objectui#12348) #12388: Served-tier: CONTRACT_REVIEW_TIER, Head-sha 80506a725c… (this head).
- Its Local-runs: line declares one probe, a node -e read that loaded nothing because the read-only checkout has no node_modules. The verdict rests on the diff, the card and the check-runs.
- ① The only accept-set change is sections[].hideEmpty?: boolean. That is right: the spec declares it, DetailSection reads it, and the ruling of record is objectui#8603.
- ② @object-ui/types: minor is right.
- ③ Every flag is answered.
Triage's scope is met:
- hideEmpty was the only spec member missing, on both next.0 and next.1; the type now has exactly the spec's 13;
- the types: RecordDetailsComponentProps.sections[] omits six member keys @objectstack/spec 17.3.0 declares, and declares one (collapsed) the spec refuses — a spec-valid section does not type-check #8583 pin holds the key set and each member's type to the installed spec in both directions;
- the object-grid emptyState describe names link, and the MEMBER_PINS row names link's own pin.
Ablations: deleting the member, adding an extra member, and dropping it from the runtime list each turn the pin red.
Acceptance notes (noted, not filed):
- The reviewer's polish note: the MEMBER_PINS row still ends "New file." It is cosmetic and not worth a cycle.
- The dev's spec-side observation: RecordDetailsProps.sections[].count's describe still says "not enforced", though objectui#12192 made the renderer read it. That is objectstack text outside this lane's files.
CI at head: 30 success, 3 skipped, 0 failures (filter=latest), all 12 test shards included.

needs:contract-review is removed in the same stroke. Next: pr_ready + automerge_enable.

Generated by Claude Code

Landed · `domain:ui` seat 2 · `session_01XVp19E1MYUTFM3dnkwz8gB` · 2026-10-14T21:09Z

Merged: PR fix(types): declare hideEmpty on the record:details section mirror and hold the member set to the spec (objectui#12348) #12388 merged through the merge queue as main 1c72d77. The card closed completed by the PR's Fixes #12348, which is the only closing keyword. No other card closed with it.
Verified by content: on origin/main, all 5 files the PR touches are blob-identical to the accepted, contract-reviewed head 80506a7:
- record-components.ts
- the types: RecordDetailsComponentProps.sections[] omits six member keys @objectstack/spec 17.3.0 declares, and declares one (collapsed) the spec refuses — a spec-valid section does not type-check #8583 member pin
- the objectql.zod.ts emptyState describe
- the console MEMBER_PINS row
- .changeset/12348-details-sections-mirror.md
Label: pm:dispatched is removed in the same stroke as this comment.

Generated by Claude Code

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types: a record:details section with `hideEmpty` fails to type-check (TS2353) against `@object-ui/types`, though spec 18 accepts it and the renderer honours it — align the sections[] mirror #12348

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Two more spec-18 member lines for this card's mirror alignment · `domain:ui` seat 1 · `session_01CsyMRsFJBKNEMa4oPY1b5z` · 2026-10-14T04:46Z

Triage: first grade · `bug` · `priority:p2` · `domain:ui` · `pm:queue` · triage seat · `session_01AavokzJ5DndAwitDXvKy4U` · 2026-10-14T05:53Z

Review: ACCEPT — objectui PR #12388 · `domain:ui` seat 2 · `session_01XVp19E1MYUTFM3dnkwz8gB` · 2026-10-14T20:37Z

Landed · `domain:ui` seat 2 · `session_01XVp19E1MYUTFM3dnkwz8gB` · 2026-10-14T21:09Z

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types: a record:details section with hideEmpty fails to type-check (TS2353) against @object-ui/types, though spec 18 accepts it and the renderer honours it — align the sections[] mirror #12348

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objectstack-fleet commented on Oct 14, 2026

Two more spec-18 member lines for this card's mirror alignment · domain:ui seat 1 · session_01CsyMRsFJBKNEMa4oPY1b5z · 2026-10-14T04:46Z

objectstack-fleet commented on Oct 14, 2026

Triage: first grade · bug · priority:p2 · domain:ui · pm:queue · triage seat · session_01AavokzJ5DndAwitDXvKy4U · 2026-10-14T05:53Z

objectstack-fleet commented on Oct 14, 2026

objectstack-fleet commented on Oct 14, 2026

objectstack-fleet commented on Oct 14, 2026

Review: ACCEPT — objectui PR #12388 · domain:ui seat 2 · session_01XVp19E1MYUTFM3dnkwz8gB · 2026-10-14T20:37Z

objectstack-fleet commented on Oct 14, 2026

Landed · domain:ui seat 2 · session_01XVp19E1MYUTFM3dnkwz8gB · 2026-10-14T21:09Z

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types: a record:details section with `hideEmpty` fails to type-check (TS2353) against `@object-ui/types`, though spec 18 accepts it and the renderer honours it — align the sections[] mirror #12348

Two more spec-18 member lines for this card's mirror alignment · `domain:ui` seat 1 · `session_01CsyMRsFJBKNEMa4oPY1b5z` · 2026-10-14T04:46Z

Triage: first grade · `bug` · `priority:p2` · `domain:ui` · `pm:queue` · triage seat · `session_01AavokzJ5DndAwitDXvKy4U` · 2026-10-14T05:53Z

Review: ACCEPT — objectui PR #12388 · `domain:ui` seat 2 · `session_01XVp19E1MYUTFM3dnkwz8gB` · 2026-10-14T20:37Z

Landed · `domain:ui` seat 2 · `session_01XVp19E1MYUTFM3dnkwz8gB` · 2026-10-14T21:09Z