@@ -0,0 +1,11 @@
+---
+'@objectstack/spec': patch
+---
+
+docs(spec): `record:line_items` `columns` states that an identity-only column hydrates from the child object's field, as on the master-detail carriers, so its heading is the child field's label and translates with it (#24140)
+
+Clause-②: no
+
+`RecordLineItemsProps.columns` said that this block does not hydrate a column from the child object's field, so authors had to declare `label`, `type` and `options` on every column, and an identity-only `{ name }` column was headed by its field name. That contradicted the shared column contract the block takes by reference: `InlineGridColumnSchema.label` says it "defaults to the child field's label via hydration". It also left a declared column heading as a plain string that no translation bundle key reaches, so a non-English print of a line-items table read English headings. The describe now states the carriers' rule in the carriers' words. Identity-only entries (`{ name }`) hydrate everything else from the child object's fields, `label`, `type` and `options` included, so the heading is the child field's label, which translates through that field's own translation. Declaring `type` opts a column out of hydration.
+
+Text only: every input that parsed before parses now, and every refusal is unchanged. The renderer half is objectui's `LineItemsPanel`, which will reuse the same column hydration the master-detail grid uses. Until the console carries it, an identity-only `record:line_items` column still draws as a text cell headed by its field name, so keep explicit labels on columns you need headed today.
@@ -1800,7 +1800,7 @@ Type: `string`
 | :--- | :--- | :--- | :--- |
 | **childObject** | `string` | optional | Child object whose records this grid lists, edits and saves. Optional because the component-level `dataSource` binding can supply the object instead; with neither, the panel shows a configuration hint and fetches nothing |
 | **relationshipField** | `string` | ✅ | FK on the child object pointing back to the parent record — the rows are queried as `{ [relationshipField]: parentId }`. Required: this panel does not auto-detect it |
-| **columns** | `{ name: string; label?: string; type?: Enum<'text' \| 'number' \| 'currency' \| 'date' \| 'datetime' \| 'time' \| 'select' \| 'lookup' \| 'file'>; width?: number; … }[]` | ✅ | Editable grid columns, drawn exactly as declared. Each entry is the strict, name-keyed inline grid column a relationship field's `inlineColumns` takes (`{ name, label?, type?, options?, … }` — objectui GridColumn); unknown keys and the retired `field` spelling are refused. Unlike the master-detail carriers, this block does NOT hydrate a column from the child object's field: declare `label`, `type` and `options` yourself — an identity-only `{ name }` column is a text cell headed by its name. Required, with at least one column: nothing derives them, and an empty list draws a grid with no cells |
+| **columns** | `{ name: string; label?: string; type?: Enum<'text' \| 'number' \| 'currency' \| 'date' \| 'datetime' \| 'time' \| 'select' \| 'lookup' \| 'file'>; width?: number; … }[]` | ✅ | Editable grid columns. Each entry is the strict, name-keyed inline grid column a relationship field's `inlineColumns` takes (`{ name, label?, type?, options?, … }` — objectui GridColumn); unknown keys and the retired `field` spelling are refused. As on the master-detail carriers, identity-only entries (`{ name }`) hydrate everything else from the child object's fields, `label`, `type` and `options` included, so an identity-only column is headed by the child field's label and translates with it. Declaring `type` opts a column out of hydration — supply its `label`, `options` and other extras yourself. Required, with at least one column: nothing derives them, and an empty list draws a grid with no cells |
 | **parentObject** | `string` | optional | Parent object the `totalField` rollup is written to (default: the object of the record on the page) |
 | **parentId** | `string` | optional | Parent record id the rows belong to (default: the record on the page). Wins over `recordId` |
 | **recordId** | `string` | optional | Alternate spelling of `parentId` the renderer also reads; `parentId` wins when both are set |
 
@@ -2430,22 +2430,33 @@ const RECORD_LINE_ITEMS_HISTORY =
  * `object-master-detail-form` detail entry's `columns` take, not a copy: the
  * panel hands its columns to the same objectui grid (`GridField`, whose
  * `GridColumn` declares exactly that schema's twenty keys and IS the spec's
- * type by reference). One difference is the
- * carrier's, not the column's, and the `describe()` says it: this panel does
- * NOT hydrate a column from the child object's field — it passes `columns`
- * straight through the field-security pass to the grid — so a column draws exactly what it declares, and an identity-only `{ name }`
- * column is a text cell headed by its name. For the same reason
- * `defineStack`'s identity-only check (`collectHydratedInlineColumnErrors` in
- * `stack.zod.ts`) does not reach this block: there is no hydrated type to
- * judge.
+ * type by reference). The column also means here what it means on those
+ * carriers (#24140, route B), because the column schema's own `label` describe
+ * — "defaults to the child field's label via hydration" — governs every
+ * carrier: a column that declares no `type` hydrates from the child object's
+ * field through objectui's `hydrateColumns`, so an identity-only `{ name }`
+ * column takes the child field's label (and with it that label's
+ * translation), its cell type and its options; declaring a `type` opts the
+ * column out. The renderer half is objectstack-ai/objectui#12854:
+ * `LineItemsPanel` reuses `hydrateColumns`, not a second resolver. Until the
+ * `.objectui-sha` pin carries it, the panel hands `columns` to the grid
+ * through the field-security pass alone, and an identity-only column draws as
+ * a text cell headed by its name.
+ *
+ * `defineStack`'s resolved-type check (`collectHydratedInlineColumnErrors` in
+ * `stack.zod.ts`) walks the three master-detail carriers and not this block,
+ * so an identity-only column here that hydrates to a type carrying a
+ * type-conditional column rule (today `currency`, which refuses `scale`) is
+ * not judged at publish. Closing that gap changes what publishes, so it is a
+ * change of its own, not part of this block's describe.
  *
  * The keys this block shares with an `object-master-detail-form` detail entry
  * take that entry's types and alias table, so one concept is spelled one way
  * on every child-collection surface. Three of them differ in presence for a
  * measured reason: `relationshipField` and `columns` are required here because
  * nothing derives them (the entry auto-detects the FK and derives the
  * columns; this panel queries `{ [relationshipField]: parentId }` and draws
- * `columns` as given), and `childObject` is optional because the
+ * only the authored `columns`), and `childObject` is optional because the
  * component-level `dataSource` binding can supply it instead. `title` is a
  * plain string because the panel draws it as a React child.
  */
@@ -2492,7 +2503,7 @@ export const RecordLineItemsProps = lazySchema(() => strictObject({
   relationshipField: z.string()
     .describe("FK on the child object pointing back to the parent record — the rows are queried as `{ [relationshipField]: parentId }`. Required: this panel does not auto-detect it"),
   columns: z.array(InlineGridColumnSchema).min(1)
-    .describe("Editable grid columns, drawn exactly as declared. Each entry is the strict, name-keyed inline grid column a relationship field's `inlineColumns` takes ({ name, label?, type?, options?, … } — objectui GridColumn); unknown keys and the retired `field` spelling are refused. Unlike the master-detail carriers, this block does NOT hydrate a column from the child object's field: declare `label`, `type` and `options` yourself — an identity-only `{ name }` column is a text cell headed by its name. Required, with at least one column: nothing derives them, and an empty list draws a grid with no cells"),
+    .describe("Editable grid columns. Each entry is the strict, name-keyed inline grid column a relationship field's `inlineColumns` takes ({ name, label?, type?, options?, … } — objectui GridColumn); unknown keys and the retired `field` spelling are refused. As on the master-detail carriers, identity-only entries ({ name }) hydrate everything else from the child object's fields, `label`, `type` and `options` included, so an identity-only column is headed by the child field's label and translates with it. Declaring `type` opts a column out of hydration — supply its `label`, `options` and other extras yourself. Required, with at least one column: nothing derives them, and an empty list draws a grid with no cells"),
   parentObject: z.string().optional()
     .describe("Parent object the `totalField` rollup is written to (default: the object of the record on the page)"),
   parentId: z.string().optional()