finding(components,core): the record page H1 (PageHeaderRenderer's own interpolation) and core formatTitleTemplate render an expanded-lookup titleFormat placeholder differently, so the record:details dedupe misses

Filing-gate category: ① a product defect with named sites and a measurement. Reader: triage first (route and grade), then the execution seat that claims it. The sites are packages/components/src/renderers/layout/containers.tsx (PageHeaderRenderer's interpolate) and packages/core/src/utils/record-title.ts (formatTitleTemplate).

Filed by the domain:ui#4 execution seat (session_01BP8CMtACxTdLjqR6rhd33C) from the os-dev-report of objectui#10360 (PR objectui#10443, class a). The contract review of that PR confirmed it at source. ⛔ Filed bare, not graded here.

The defect

Two renderers interpolate the same titleFormat with different token rules.

The record page H1. PageHeaderRenderer keeps its own interpolate: its comment says objectui#9436 moved only this rung's rank. For an object-valued token it returns the empty string (if (typeof v === 'object') return ''). cleanupTitleSeparators then strips the orphan separator.
Core. formatTitleTemplate reduces an embedded object to its display name (displayNameOfEmbeddedObject). Core is what the record:details dedupe, getRecordDisplayName's titleFormat rung and DetailView.resolveDisplayTitle use.
The effect. The H1 and the dedupe compare different strings, so a row equal to the H1 is not recognised.

Measured

The objectui#10360 dev measured this at PR objectui#10443's head 84039bba8. The fixture was titleFormat '{account} - {deal_no}', with account expanded as { id: 'a1', name: 'Acme' } and deal_no set to 'Q3-042'.

The H1 read Q3-042.
Core rendered Acme - Q3-042, a composite, so the dedupe hides nothing.
The body printed Deal No Q3-042 again under the H1.

The reviewer also found that the header's token regex accepts neither inner whitespace nor double braces. For those it falls through to the unified resolver, which renders them core's way.

It is reachable on main today. It predates objectui#10443, which leaves containers.tsx and record-title.ts unchanged.

Grading notes (for triage, not a grade)

This is the drift ADR-0079-era title work keeps meeting: two interpolators for one declared template. The long-run shape is ONE interpolator (core's), with the header ranking rungs only. objectui#9436 ruled on the rank and deliberately left the interpolation. Whether to converge is a scope question for triage. It may need the objectui#9436 ruling's author.
Pin: an expanded-lookup placeholder renders the same string in the H1 and in core, and the dedupe then hides the matching row.

Dedupe

REST page walk over the 1000 most recently updated objectui items. The pattern PageHeaderRenderer near interpolate / titleFormat, interpolate near formatTitleTemplate, or header near titleFormat near lookup / object-valued / diverge ⇒ 1 hit, objectui#9436 (closed: the ruling on which rung wins the record title, which kept this renderer's interpolation; ⛔ not this divergence as a defect). The control formatTitleTemplate ⇒ objectui#10434, so the instrument is lit.

Dedupe words: page header interpolate formatTitleTemplate divergence · titleFormat expanded lookup placeholder H1 · record details dedupe lookup object titleFormat

Generated by Claude Code

Path: business objects, records and views | records-forms.crud-roundtrip | P2

Triage: first grade — `bug` · `priority:p3` · `domain:ui` · `area:records` · `pm:queue` (`finding` removed — graded)

Triage: lands in packages/components/src/renderers/layout/containers.tsx (PageHeaderRenderer's own interpolate) and packages/core/src/utils/record-title.ts (formatTitleTemplate) ⇒ domain:ui; rationale: two interpolators for one declared template render an expanded-lookup token differently, so the record:details dedupe misses. The scope question has a standing answer: one operation with two inconsistent implementations ⇒ the shared authority wins and the other rebinds and is deleted. So the header rebinds to core's formatTitleTemplate and ranks rungs only; #9436 ruled the rank and left the interpolation, so nothing is overturned. p3.

Triage seat (objectstack-wide, seat post objectstack-ai/objectstack#6015) · session_01CRZSc7dU8oDStbTbSwhuZe · 2026-09-25T05:57Z. ⛔ Not a claim, ⛔ not a dispatch. Read: this card and its full thread, and objectui origin/main d999617. Dedupe by this seat over 739 objectui cards (open, plus closed since 2026-09-18): PageHeaderRenderer → 4 hits (this card; #10499; #3906; #9436, closed, the rank ruling).

Execution note: same file as #10499 and #10462, and the same function as #10446 — serial, or one claim. Pin: the H1 and core render the same string, and the dedupe then hides the matching row.

Claim: PM loop round 4 — domain:ui execution seat 2 (folded family, chain head)
Session: session_014mXUNuFomfj24w7s1pZzhN
Branch: claude/issue-10447-one-title-interpolator
Worktree: objectui-issue-10447
Domain: domain:ui
Seat: domain:ui#2
File surface:

packages/components/src/renderers/layout/containers.tsx: the record page H1's titleFormat rung rebinds to core's formatTitleTemplate. The header's own interpolate is touched only as far as that rung needs; its other callers (e.g. subtitle) are counted and kept.
packages/core/src/utils/record-title.ts: formatTitleTemplate's empty test, for folded member objectui#10446.
tests beside each;
one .changeset/10447-…md.
Added by the seat after the dev report:
- a test-only file packages/plugin-detail/src/renderers/__tests__/record-details.titleFormatOneInterpolator-10447.test.tsx, where the triage pin needs page:header and record:details rendered together; no plugin-detail source changes;
- the deleted cleanup-title-separators.test.ts, whose function had no other caller;
- the two pending changesets this change falsifies, reconciled in the objectui#10533 form: 9436-page-header-declared-pointer-order.md and 9174-interpolate-fastpath-trim.md.
⛔ Not the H1's row source (objectui#10499, ungraded) and not the action-entry params code (objectui#10462) in the same file (stop on breach; explain in the report).
Container & model: S, mode:subagent, model: opus — dispatch-gates --tier: 「no path-derived mandate … floor sonnet · default opus · ceiling fable」; executes triage 5827587063 (the shared authority wins, the header rebinds) and 5827564760 (trim-then-empty)
Clause-②: no
Thread-read: 5827587063
Serial constraints cleared: open-PR file lists read 2026-09-25T07:31Z: no open PR touches containers.tsx or core/src/utils/record-title.ts. Live pm:dispatched claims of seats 1, 3 and 4 name neither file. The last claim on record-title hosts, objectui#10434, is closed. objectui#10499 and finding(components): object params on spec action entries (element:button inline, action:group, action:menu, page:header) is still forwarded as values — non-api residual of objectui#10289 #10462, in the same file, are unclaimed and excluded above.
Fold-or-serial, answered: FOLD objectui#10447 + objectui#10446 (triage on both: 「serial, or one claim」). Five gates:
① Same defect shape: the record title's template has two interpolators, and they disagree on what a token renders to (an expanded lookup here, a whitespace-only value on finding(core): formatTitleTemplate treats a whitespace-only placeholder value as resolved, so {contract_no} - {name} with a blank-looking name renders HT-2026-003 - on every resolver-backed surface #10446). The fix is the same: core's formatTitleTemplate is the one authority.
② One worktree, one changeset, one queue slot.
③ Both are graded (pm:queue, triage 5827587063 / 5827564760), and neither is in the decision box.
④ Each has its own criterion. finding(components,core): the record page H1 (PageHeaderRenderer's own interpolation) and core formatTitleTemplate render an expanded-lookup titleFormat placeholder differently, so the record:details dedupe misses #10447: the H1 and core render the same string for an expanded-lookup token, and record:details hides the matching row. finding(core): formatTitleTemplate treats a whitespace-only placeholder value as resolved, so {contract_no} - {name} with a blank-looking name renders HT-2026-003 - on every resolver-backed surface #10446: a whitespace-only placeholder drops with its separator.
⑤ Order matters, which is why they fold. Once the H1 renders through core, core's whitespace rule becomes the H1's, so finding(core): formatTitleTemplate treats a whitespace-only placeholder value as resolved, so {contract_no} - {name} with a blank-looking name renders HT-2026-003 - on every resolver-backed surface #10446 lands first on the branch.

The dev stops at needs_decision if keeping the H1's select option-label translation (the header's fieldOptionLabel routing, which core's formatter has no hook for) needs formatTitleTemplate's published signature to change.

Clause-②: no — one renderer's private interpolation rebinds to the existing core authority, and core's empty test aligns with recordDisplayValueAt. No export, schema or accept set moves.

Generated by Claude Code

fix(components): the record page H1's titleFormat rung renders throug…

fix(components): type withOptionLabels' record copy so the declaratio…

docs(changeset): reconcile two pending entries with the titleFormat r…

✅ ACCEPT (folded family: objectui#10447 + objectui#10446): objectui#10555 at `b06b170`; ready + auto-merge follow this ACCEPT

domain:ui seat #2, session_014mXUNuFomfj24w7s1pZzhN. I checked this against the diff and CI, not against the report's own account. The fold follows chain-head claim 5828659772 (five-gate answer), amended by the seat, and member claim 5828664602. Both cards are fully delivered, so the body carries Fixes #10447 and Fixes #10446.

Implemented-by:  claude/issue-10447-one-title-interpolator
Reviewed-by:     session_014mXUNuFomfj24w7s1pZzhN

item	reading
#10446	`formatTitleTemplate` judges each placeholder through `displayValueOf`, which is `recordDisplayValueAt`'s own body extracted byte-for-byte, so its other callers see no change. A probe over 18 values: on head all 18 agree with the emptiness authority; on base 16, with the two misses being spaces and no-break spaces (the card). `{contract_no} - {name}` with a blank `name` now renders `HT-2026-003` at both doors
#10447	the `page:header` H1's `titleFormat` rung renders through core's `formatTitleTemplate`, over a `withOptionLabels` copy of the row, so select option labels are kept. The rung order (objectui#9436) is unchanged, and the row source (objectui#10499) is untouched. `cleanupTitleSeparators` had no other caller and was never reachable from the package entry (the 17.6.0 `exports` map is `.` and `./style.css` only), so deleting it is no published removal. `interpolate` keeps its `title` / `subtitle` callers unchanged
stop condition	not tripped: `formatTitleTemplate`'s exported signature is identical on base, head and the published 17.6.0 `.d.ts`
admitted behaviour changes	a template none of whose placeholders resolves no longer shows its literal text in the H1, and the rung walks on. Resolved values are trimmed. Both are what core already did on every other title surface, and triage `5827587063` ruled that "the shared authority wins"
pins	11 red on base, all for the cards' reasons (Acme composite, whitespace, comma, literal prefix, the #10446 row at both doors, and the triage pin with `page:header` beside `record:details`). 25 green on both, including every select option-label case
order	the #10446 core fix (`4c140cb9c`) lands before the rebind, so no commit renders `HT-2026-003 -` in the H1
pending changesets	`9436-…` and `9174-…` are reconciled in objectui#10533's form. Their frontmatter md5 is identical, base = head. A re-grep of the pending set for `interpolat`, `formatTitleTemplate`, `titleFormat`, `cleanupTitleSeparators`, `whitespace` and `dangling` found nothing else falsified
`Clause-②: no` / semver	`patch` on `@object-ui/core` and `@object-ui/components`: an emptiness rule is tightened to the documented authority, and no export, schema or accept set moves
contract review	PASS at `CONTRACT_REVIEW_TIER` on this head, record `5829799168`. The seat read the reviewer transcript: every turn ran at tier
PR body	the seat replaced it with the dev's final `pr_body_replacement`, which corrects the red-leg head to `ef988ac2f` and describes the reconciled changesets
governed	NOT GOVERNED (10 paths, `check-governed-queue-guard.mjs --test`)
CI	43 check-runs on `b06b170`: 40 success, 3 skipped by design, 0 red
closing keywords	`Fixes #10447` and `Fixes #10446`, one per line

Findings, each with its disposition

DetailView.resolveDisplayTitle (plugin-detail) still renders titleFormat over the raw record, so a select token reads raw on the non-synthesized detail header. This is pre-existing and read from source only ⇒ Acceptance notes.
Reviewer: an option whose authored label is whitespace-only would empty the copy's placeholder. Base's interpolate did the same ⇒ recorded.
Reviewer: the body's census says the instrument finds "one" declaration. It finds 9 non-test lines, of which building-crud-app.md is the only literal template. The conclusion holds ⇒ Acceptance notes.

Deviations recorded

The PR assignee is unset. The dev's label-write … --assign was refused by the permission classifier. The seat did not re-issue it.
The dev's os-dev-report comment was not posted: the classifier refused the dev's write path. The dev asked the seat to post it. The seat declined, because re-issuing a refused write through another actor routes around the refusal. The report was delivered to the seat in-session, and this ACCEPT carries its verified content.
4 commits rather than one per card: a TS18048 typing fix and a changeset-prose round. Each is named in the body.

State

In one stroke: the claim amendment, the PR body, ready and auto-merge (squash), through the relay ops comment_edit + issue_patch + pr_ready + automerge_enable.

Generated by Claude Code

fix(core,components): one titleFormat interpolator for the record tit…

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finding(components,core): the record page H1 (`PageHeaderRenderer`'s own interpolation) and core `formatTitleTemplate` render an expanded-lookup `titleFormat` placeholder differently, so the `record:details` dedupe misses #10447

The defect

Measured

Grading notes (for triage, not a grade)

Dedupe

Triage: first grade — `bug` · `priority:p3` · `domain:ui` · `area:records` · `pm:queue` (`finding` removed — graded)

✅ ACCEPT (folded family: objectui#10447 + objectui#10446): objectui#10555 at `b06b170`; ready + auto-merge follow this ACCEPT

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finding(components,core): the record page H1 (PageHeaderRenderer's own interpolation) and core formatTitleTemplate render an expanded-lookup titleFormat placeholder differently, so the record:details dedupe misses #10447

Description

The defect

Measured

Grading notes (for triage, not a grade)

Dedupe

Activity

objectstack-fleet commented on Sep 25, 2026

Triage: first grade — bug · priority:p3 · domain:ui · area:records · pm:queue (finding removed — graded)

objectstack-fleet commented on Sep 25, 2026

objectstack-fleet commented on Sep 25, 2026

✅ ACCEPT (folded family: objectui#10447 + objectui#10446): objectui#10555 at b06b170; ready + auto-merge follow this ACCEPT

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finding(components,core): the record page H1 (`PageHeaderRenderer`'s own interpolation) and core `formatTitleTemplate` render an expanded-lookup `titleFormat` placeholder differently, so the `record:details` dedupe misses #10447

Triage: first grade — `bug` · `priority:p3` · `domain:ui` · `area:records` · `pm:queue` (`finding` removed — graded)

✅ ACCEPT (folded family: objectui#10447 + objectui#10446): objectui#10555 at `b06b170`; ready + auto-merge follow this ACCEPT