diff --git a/‎.changeset/11630-detail-group-visible-when.md‎
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diff --git a/‎packages/app-shell/src/views/RecordDetailView.tsx‎
Lines changed: 13 additions & 10 deletions b/‎packages/app-shell/src/views/RecordDetailView.tsx‎
Lines changed: 13 additions & 10 deletions
diff --git a/‎packages/plugin-detail/src/index.tsx‎
Lines changed: 1 addition & 1 deletion b/‎packages/plugin-detail/src/index.tsx‎
Lines changed: 1 addition & 1 deletion
@@ -0,0 +1,32 @@
+---
+'@object-ui/plugin-detail': minor
+'@object-ui/app-shell': minor
+---
+
+A field group's `visibleWhen` now gates its section on the record detail page, the same way it gates the section on the entry form (objectui#11630). Take an object whose `fieldGroups` entry declares `visibleWhen: "record.kind == 'pro'"`. The edit form hid the "Pro details" section on a `basic` row, but the detail page drew it on every row, header included. The detail page now draws it only where the predicate holds.
+
+**How it works.** The detail body now writes each field group as `@objectstack/spec`'s own reference form, `{ group: KEY }` (`RecordDetailsProps.sections[].group`). `record:details` resolves the reference against the object's `fieldGroups`: the group's members, label, icon, description and collapse state, and its `visibleWhen`. The predicate is evaluated per record with the form's own evaluator (`resolveFieldRuleState` from `@object-ui/core`, under `usePredicateScope`), and both spellings work as they do on the form: a bare CEL string or a `{ dialect: 'cel', source }` envelope.
+
+- Values bind under `record.`, so a bare identifier is unbound.
+- A declared field the row does not carry compares as `null`.
+- A relation binds as its stored id, even when the page's record arrived expanded.
+- `previous` binds the persisted row, as on the record's edit form.
+- A predicate that cannot be evaluated SHOWS the section and warns once, which is what the form does.
+
+A FALSE verdict removes the whole section, heading and members. This is display only: the record API serves those fields either way.
+
+**Clause-②: yes (output shape change).** BREAKING for code that reads the synthesized sections of a grouped object. The bump is still `minor`: under this repo's release model, objectui's major follows the `@objectstack` family major, and its own breaking changes ship as `minor` with the breaking semantics stated here.
+
+- `buildDefaultPageSchema`, `buildDefaultTabs`, `buildDefaultDetails` and `resolveDetailSections` (`@object-ui/plugin-detail`) change the `record:details` `properties.sections[]` they emit for an object with `fieldGroups`:
+  - Each declared group becomes `{ group: KEY, columns }`. It used to be an enumerated copy of the group: `name`, `label`, `icon`, `description`, `collapsible`, `defaultCollapsed`, `columns`, and `fields` as rich `{ name, label, type, … }` descriptors.
+  - The trailing ungrouped section keeps `columns` and lists `fields` as bare names.
+  - The node now parses as `RecordDetailsProps`; the old one was refused at every field object. Pages Studio seeds from it (`createSeed`) change the same way. An explicit `sections` option is still returned unchanged.
+- `record:details` gates a `{ group }` reference with the group's `visibleWhen`. It does not read `visibleWhen` off an enumerated section, a key the spec refuses there.
+- The console's default record page (`RecordDetailView`, `@object-ui/app-shell`) writes `{ group: KEY, showBorder: true }` for each declared group. Its ungrouped primary and "More details" sections are unchanged.
+- The `record:details` registration's `sections` input description now says a `{ group }` reference inherits the group's `visibleWhen`, and that one written on a section itself is not read.
+- Unchanged: `deriveFieldGroupDetailSections` still returns the resolved, enumerated sections (what a reference renders as), with no `visibleWhen` on them. No type member, zod member, registered `inputs` entry, prop or i18n key is added.
+
+**Migration.**
+
+- FROM reading a group's heading or members off a synthesized section (`sections[i].label`, `sections[i].fields`) → TO `deriveFieldGroupDetailSections(def)`, which returns the resolved sections, or the group's own entry in `def.fieldGroups`.
+- FROM a stored page section copied from an older seed, `{ name: 'pro', label: 'Pro details', fields: [ … ] }` → TO `{ group: 'pro' }`, with `columns` / `showBorder` / `headerColor` kept if you set them. Only the reference form inherits the group's `visibleWhen`; an enumerated copy renders on every row, as before.
@@ -2274,21 +2274,24 @@ export function RecordDetailView({ dataSource, objects, onEdit, objectNameOverri
           //    fields stay tucked away.
           const grouped = deriveFieldGroupDetailSections(objectDef as any);
           if (grouped) {
-            return grouped.flatMap((sec: any) => {
+            return grouped.flatMap<Record<string, unknown>>((sec: any) => {
               if (!sec.name) {
                 return splitPrimarySecondary(
                   (sec.fields as any[]).map((f: any) => f.name),
                 );
               }
-              return [{
-                ...sec,
-                // Re-resolve the derived heading through the per-object i18n
-                // convention. Reads and writes the same one slot the
-                // synthesizer emits and `record:details` consumes —
-                // `label` (objectui#6190).
-                label: sectionLabel(objectDef.name, sec.name, sec.label),
-                showBorder: true as const,
-              }];
+              // A declared group is written as the spec's own REFERENCE form,
+              // `{ group: KEY }` (`RecordDetailsProps.sections[].group`,
+              // ADR-0085 §5), never as an enumerated copy of the group
+              // (objectui#11630). `record:details` resolves it against the
+              // object's `fieldGroups` — members, heading (through the same
+              // per-object i18n convention, `sectionLabel`), icon,
+              // description, collapse — and evaluates the group's
+              // `visibleWhen` against this record, which an enumerated copy
+              // cannot carry: the spec refuses `visibleWhen` on one. The
+              // Card chrome stays this page's layout choice, a key the spec
+              // permits beside `group`.
+              return [{ group: sec.name as string, showBorder: true as const }];
             });
           }
 
 
@@ -530,7 +530,7 @@ ComponentRegistry.register('details', RecordDetailsRenderer, {
   // `record:reference_rail`'s own component-level `hideEmpty` input below.
   inputs: [
     { name: 'columns', type: 'enum', enum: ['1', '2', '3', '4'], description: 'Number of columns for field layout (1-4)' },
-    { name: 'sections', type: 'array', of: 'object', description: 'Field groups rendered as the detail body, in order. Every entry is an OBJECT — `{ name?, label?, columns?, fields }` — a bare section-id string is NOT accepted (the spec retired that spelling in objectstack#5611, and the renderer reads name/label/fields off each entry, so a string entry renders no fields at all). `fields` are the field names shown in this section, in order — required unless `group` supplies the members instead (the spec refuses a section carrying neither, and refuses one carrying both). `label` is the section heading; omit it for an untitled, borderless section. `name` is a stable snake_case identifier and the i18n anchor — the heading resolves through objects.<object>._sections.<name>.label, so a section without a name shows its authored label in every locale. `columns` (1-4) is THIS section\'s field-grid width; omit it and the renderer derives the width. Authoring `sections` at all makes it the only source of the detail body; omit it and the body falls back to the object\'s highlightFields. @objectstack/spec 17.3.0 declares eight more member keys on an entry, and this renderer honours all eight: `icon` (a Lucide name on the section header), `description` (sub-heading copy under the heading), `collapsible` and `defaultCollapsed` (a foldable section and its initial state), `showBorder` (force the Card wrapper on or off, overriding the heading-derived default) and `headerColor` (a header tint from the shared palette) through DetailSection, plus `group` — the ADR-0085 §5 REFERENCE form, the alternative to enumerating `fields`. `{ group: \'contact_info\' }` inherits the object\'s `fieldGroups` entry with that key: its members (every visible field pointing at it, in declaration order) and its presentation (label, icon, description, collapse) all come from the group, so the section restates none of it and the spec refuses those keys beside `group`; `columns`, `showBorder` and `headerColor` stay yours because they are how THIS page lays the section out. A `group` naming no declared group renders nothing and is reported to the console (`@objectstack/lint` flags it as `page-section-group-unknown`). `hideEmpty` is the eighth, and it decides whether an ALL-empty section exists: it defaults to on, so a section whose fields are every one of them empty renders nothing at all — no heading, no skeleton — and `hideEmpty: false` is the spelling that keeps that heading and its label skeleton on a brand-new record. It decides ONLY the all-empty case; the empty rows of a section that still has a filled one belong to DetailSection\'s auto-hide heuristic plus the reader\'s show-empty toggle, which no authored value overrides in either polarity (objectui#7129 Q2-C), and inline-edit mode renders the section either way so its fields stay reachable. Restored under objectui#8603 (maintainer 2026-09-15) after objectui#7129 retired it on the premise, since falsified upstream, that the spec refused the key. None of the eight has a designer control yet; they are authorable in source mode only, tracked as a deferred feature.' },
+    { name: 'sections', type: 'array', of: 'object', description: 'Field groups rendered as the detail body, in order. Every entry is an OBJECT — `{ name?, label?, columns?, fields }` — a bare section-id string is NOT accepted (the spec retired that spelling in objectstack#5611, and the renderer reads name/label/fields off each entry, so a string entry renders no fields at all). `fields` are the field names shown in this section, in order — required unless `group` supplies the members instead (the spec refuses a section carrying neither, and refuses one carrying both). `label` is the section heading; omit it for an untitled, borderless section. `name` is a stable snake_case identifier and the i18n anchor — the heading resolves through objects.<object>._sections.<name>.label, so a section without a name shows its authored label in every locale. `columns` (1-4) is THIS section\'s field-grid width; omit it and the renderer derives the width. Authoring `sections` at all makes it the only source of the detail body; omit it and the body falls back to the object\'s highlightFields. @objectstack/spec 17.3.0 declares eight more member keys on an entry, and this renderer honours all eight: `icon` (a Lucide name on the section header), `description` (sub-heading copy under the heading), `collapsible` and `defaultCollapsed` (a foldable section and its initial state), `showBorder` (force the Card wrapper on or off, overriding the heading-derived default) and `headerColor` (a header tint from the shared palette) through DetailSection, plus `group` — the ADR-0085 §5 REFERENCE form, the alternative to enumerating `fields`. `{ group: \'contact_info\' }` inherits the object\'s `fieldGroups` entry with that key: its members (every visible field pointing at it, in declaration order), its presentation (label, icon, description, collapse) and its `visibleWhen` all come from the group, so the section restates none of it — the predicate is evaluated against the bound record exactly as the entry form evaluates it, and a group it hides renders nothing (a `visibleWhen` written on a section itself is refused by the spec and not read: gate the group and reference it) and the spec refuses those keys beside `group`; `columns`, `showBorder` and `headerColor` stay yours because they are how THIS page lays the section out. A `group` naming no declared group renders nothing and is reported to the console (`@objectstack/lint` flags it as `page-section-group-unknown`). `hideEmpty` is the eighth, and it decides whether an ALL-empty section exists: it defaults to on, so a section whose fields are every one of them empty renders nothing at all — no heading, no skeleton — and `hideEmpty: false` is the spelling that keeps that heading and its label skeleton on a brand-new record. It decides ONLY the all-empty case; the empty rows of a section that still has a filled one belong to DetailSection\'s auto-hide heuristic plus the reader\'s show-empty toggle, which no authored value overrides in either polarity (objectui#7129 Q2-C), and inline-edit mode renders the section either way so its fields stay reachable. Restored under objectui#8603 (maintainer 2026-09-15) after objectui#7129 retired it on the premise, since falsified upstream, that the spec refused the key. None of the eight has a designer control yet; they are authorable in source mode only, tracked as a deferred feature.' },
     { name: 'fields', type: 'array', of: 'string', description: 'Explicit field list (overrides highlightFields)' },
     // `hideFields` is DECLARED, not merely honoured (objectui#3808). The spec
     // declares it (objectstack#5611) and `RecordDetailsRenderer` has read it