@@ -0,0 +1,10 @@
+---
+"@objectstack/spec": minor
+"@objectstack/platform-objects": patch
+---
+
+Clause-②: no
+
+The field form offers `useGrouping` on `number` fields: one plain boolean row beside `scale`, gated to `number` as `scale` is, whose control copies the field form's `allowCreate` row (the same `z.boolean().optional()` node, no default). The key was declared by `FieldSchema` and graded `live` by the liveness ledger once the console's number display began to answer an authored value first, but no form offered it, so an author's only door was the Source tab. The help text follows the key's own description: unset lets the renderer decide, off never groups (a year or an ID), on always groups. It also says that an untouched switch writes nothing, so it reads off even where the renderer groups.
+
+⛔ **No schema accept set moves and no export changes.** What changes is the **form payload** `getMetaTypes()` serves and the translation keys `os i18n extract` walks, hence the regenerated `platform-objects` metadata-form bundles, whose two new leaves are authored in `zh-CN`, `ja-JP` and `es-ES` rather than left as extractor fills.
@@ -614,7 +614,13 @@ describe('#7010 corpus — shipped METADATA_FORM_REGISTRY', () => {
     // 81 → 82, `field :: inlineColumns :: data.type == 'master_detail'` added
     // and NONE removed. The other three rows and all their sub-rows carry no
     // predicate.
-    expect(predicates, 'the shipped metadata forms carry no predicates at all').toBe(82);
+    // It is 83 today, an ADDITION of ONE: the field form's `useGrouping` row,
+    // offered once the key was enforced, carries `scale`'s gate — the key is a
+    // display hint for `number` fields only. Measured, not inferred: the
+    // shipped `*.form.ts` corpus differenced against the merge base
+    // `d78a0bda07` adds exactly `field :: useGrouping :: data.type == 'number'`
+    // and removes none.
+    expect(predicates, 'the shipped metadata forms carry no predicates at all').toBe(83);
 
     const findings = validatePredicatePathRefs(corrupted);
     expect(findings).toHaveLength(predicates);
@@ -713,7 +719,9 @@ describe('#7010 corpus — shipped METADATA_FORM_REGISTRY', () => {
     // It is 57 today: #19332 G2b's one new predicate, `field :: inlineColumns`
     // on `data.type == 'master_detail'`, compares against a single-quoted
     // literal.
-    expect(comparisons, 'no shipped predicate carries an `==`/`!=` literal comparison').toBe(57);
+    // It is 58 today: the field form's `useGrouping` row is gated on
+    // `data.type == 'number'`, a single-quoted literal comparison.
+    expect(comparisons, 'no shipped predicate carries an `==`/`!=` literal comparison').toBe(58);
 
     const rhsFindings = validatePredicatePathRefs(corrupted)
       .filter((f) => f.rule === PREDICATE_RHS_PATH_SHAPED);
 
@@ -580,6 +580,10 @@ export const enMetadataForms: NonNullable<TranslationData['metadataForms']> = {
         label: "Scale",
         helpText: "Number of decimal digits"
       },
+      useGrouping: {
+        label: "Use Grouping",
+        helpText: "Digit grouping (thousands separators) in displayed values. Unset: the renderer decides; an untouched switch writes nothing, so it reads off even where the renderer groups. Off: never grouped, e.g. a year or an ID. On: always grouped."
+      },
       currencyConfig: {
         label: "Currency Config",
         helpText: "Which currency this field is in. Unset: dynamic mode. The stored value is a bare number in either mode."
 
@@ -580,6 +580,10 @@ export const esESMetadataForms: NonNullable<TranslationData['metadataForms']> =
         label: "Decimales",
         helpText: "Número de dígitos decimales"
       },
+      useGrouping: {
+        label: "Separador de miles",
+        helpText: "Agrupación de dígitos (separador de miles) en los valores mostrados. Sin definir: lo decide el renderizador; un interruptor que no se ha tocado no escribe nada, así que aparece desactivado aunque el renderizador agrupe. Desactivado: nunca se agrupa, p. ej., un año o un ID. Activado: siempre se agrupa."
+      },
       currencyConfig: {
         label: "Configuración de moneda",
         helpText: "En qué moneda está este campo. Sin definir: modo dynamic. En ambos modos el valor almacenado es un número sin más."
 
@@ -580,6 +580,10 @@ export const jaJPMetadataForms: NonNullable<TranslationData['metadataForms']> =
         label: "小数桁",
         helpText: "小数部の桁数"
       },
+      useGrouping: {
+        label: "桁区切り",
+        helpText: "表示する値の桁区切り（3 桁ごとの区切り記号）。未設定の場合はレンダラーが決めます。一度も操作していないスイッチは何も書き込まないため、レンダラーが区切る場合でもオフと表示されます。オフ：区切りません（例：年や ID）。オン：常に区切ります。"
+      },
       currencyConfig: {
         label: "通貨設定",
         helpText: "このフィールドの通貨。未設定の場合は dynamic モードです。どちらのモードでも、保存される値は単なる数値です。"
 
@@ -1148,7 +1148,9 @@ describe('#19403 round 10 — the verdicts, on the live bundles', () => {
       // three locales.
       // 658 with the `picklist` metadata type's display pair, authored in all
       // three locales.
-      expect(translated.length, `${locale} positive control`).toBe(658);
+      // 659 since the field form offers `useGrouping` on `number` fields: one
+      // new row label, authored in all three locales.
+      expect(translated.length, `${locale} positive control`).toBe(659);
     }
     // ⭐ DARK — the blindness, executable. On a synthetic two-locale catalog the
     // all-three predicate returns 0 while the per-locale one returns 1, so the
 
@@ -580,6 +580,10 @@ export const zhCNMetadataForms: NonNullable<TranslationData['metadataForms']> =
         label: "小数位",
         helpText: "小数部分位数"
       },
+      useGrouping: {
+        label: "千位分隔符",
+        helpText: "显示值时的数字分组（千位分隔符）。未设置：由渲染端决定；未改动过的开关不写入任何值，所以即使渲染端会分组，它也显示为关闭。关闭：从不分组，例如年份或 ID。开启：始终分组。"
+      },
       currencyConfig: {
         label: "货币配置",
         helpText: "此字段使用哪种货币。未设置时为 dynamic 模式。两种模式下存储的值都是一个纯数字。"
 
@@ -82,6 +82,16 @@ export const fieldForm = defineForm({
         // unit and are declared nowhere.
         { field: 'precision', visibleWhen: "data.type == 'currency' || data.type == 'number'", helpText: 'Total digits' },
         { field: 'scale', visibleWhen: "data.type == 'number'", helpText: 'Number of decimal digits' },
+        // `useGrouping` is shown once it is enforced (ruling 5916202706: offer
+        // it) — objectui's `shouldGroupDisplayNumber` answers an authored value
+        // first, so the order is the `valueDomain` row's: declared = enforced =
+        // shown. A plain boolean row, the face of the `allowCreate` row below
+        // (the same `z.boolean().optional()` node, no default): the switch
+        // writes nothing until toggled, so an untouched field stays unset and
+        // the renderer decides. It reads off meanwhile, even where the renderer
+        // groups, and the help text says so in the words of the `object.form.ts`
+        // `userActions` row. Gated like `scale`, a `number`-only hint.
+        { field: 'useGrouping', visibleWhen: "data.type == 'number'", helpText: 'Digit grouping (thousands separators) in displayed values. Unset: the renderer decides; an untouched switch writes nothing, so it reads off even where the renderer groups. Off: never grouped, e.g. a year or an ID. On: always grouped.' },
         // #19332 G1b (ruling 5861442317, G1) — `currencyConfig` is a strict object
         // with two keys, and both members of its one enum are spellable option
         // values, so it takes the `object.form.ts` `access` / `lifecycle` face: a
 
@@ -384,13 +384,6 @@ const LEDGER: ReadonlyArray<OmitEntry | SubsetEntry> = [
     key: 'externalSharingModel',
     why: 'declared, not enforced yet — liveness verdict `planned` (ADR-0090 D11: validated at authoring time only; the audience-aware evaluator branch that would honour it is scheduled, not built). No offer until it is enforced; whether to offer it then is a ruling for the enforcement, not for this gate',
   },
-  {
-    kind: 'omit',
-    type: 'field',
-    path: ROOT_PATH,
-    key: 'useGrouping',
-    why: 'declared, not enforced yet — liveness verdict `planned` (the renderer read side that maps it onto `Intl.NumberFormat` is not landed). No offer until it is enforced; whether to offer it then is a ruling for the enforcement, not for this gate',
-  },
   {
     kind: 'omit',
     type: 'field',