diff --git a/.objectui-sha b/.objectui-sha
index 24cbfd904..ccd613957 100644
--- a/.objectui-sha
+++ b/.objectui-sha
@@ -1 +1 @@
-3d275b5bfc3aac253ec6c1a63e389e5f084f0f5a
+028ad35533474594abf29f68e8e5bedac5e5160b
diff --git a/packages/spec/src/ui/dashboard.test.ts b/packages/spec/src/ui/dashboard.test.ts
index fb9adcf58..ce1827ef1 100644
--- a/packages/spec/src/ui/dashboard.test.ts
+++ b/packages/spec/src/ui/dashboard.test.ts
@@ -1821,3 +1821,28 @@ describe('WidgetActionTypeSchema - unified action types', () => {
     })).not.toThrow();
   });
 });
+
+describe('DashboardWidgetSchema — dataset binding (ADR-0021 dual-form)', () => {
+  it('accepts a dataset-bound widget (dataset + dimensions + values)', () => {
+    expect(() => DashboardWidgetSchema.parse({
+      id: 'revenue_by_region', type: 'bar', dataset: 'sales',
+      dimensions: ['region'], values: ['revenue'],
+      layout: { x: 0, y: 0, w: 6, h: 4 },
+    })).not.toThrow();
+  });
+
+  it('rejects a dataset-bound widget with no values', () => {
+    expect(() => DashboardWidgetSchema.parse({
+      id: 'bad', type: 'bar', dataset: 'sales', dimensions: ['region'],
+      layout: { x: 0, y: 0, w: 6, h: 4 },
+    })).toThrowError(/needs `values`/);
+  });
+
+  it('still accepts a legacy inline widget (object + valueField + aggregate)', () => {
+    expect(() => DashboardWidgetSchema.parse({
+      id: 'legacy', type: 'metric', object: 'crm_opportunity',
+      valueField: 'amount', aggregate: 'sum',
+      layout: { x: 0, y: 0, w: 3, h: 2 },
+    })).not.toThrow();
+  });
+});
diff --git a/packages/spec/src/ui/dashboard.zod.ts b/packages/spec/src/ui/dashboard.zod.ts
index 6bc409ac5..e689b4802 100644
--- a/packages/spec/src/ui/dashboard.zod.ts
+++ b/packages/spec/src/ui/dashboard.zod.ts
@@ -197,8 +197,22 @@ export const DashboardWidgetSchema = lazySchema(() => z.object({
   
   /** Multi-measure definitions for pivot/matrix widgets */
   measures: z.array(WidgetMeasureSchema).optional().describe('Multiple measures for pivot/matrix analysis'),
-  
-  /** 
+
+  /**
+   * ADR-0021 — bind this widget to a semantic-layer `dataset` (governed,
+   * consistent metrics) instead of the inline `object` + `categoryField` +
+   * `valueField` + `aggregate` query. A dataset-bound widget selects
+   * dimensions/measures BY NAME from the dataset; numbers stay consistent with
+   * every other surface that uses the same dataset. Additive / dual-form:
+   * inline widgets are unchanged.
+   */
+  dataset: SnakeCaseIdentifierSchema.optional().describe('Dataset name to bind (ADR-0021)'),
+  /** Dimension names (from the dataset) for X / group / split. Dataset-bound only. */
+  dimensions: z.array(z.string()).optional().describe('Dimension names — X/group/split (dataset-bound)'),
+  /** Measure names (from the dataset) for the value axis. Dataset-bound only. */
+  values: z.array(z.string()).optional().describe('Measure names — Y (dataset-bound)'),
+
+  /**
    * Layout Position (React-Grid-Layout style)
    * x: column (0-11)
    * y: row
@@ -220,6 +234,15 @@ export const DashboardWidgetSchema = lazySchema(() => z.object({
 
   /** ARIA accessibility attributes */
   aria: AriaPropsSchema.optional().describe('ARIA accessibility attributes'),
+}).superRefine((w, ctx) => {
+  // ADR-0021 dual-form: a dataset-bound widget needs at least one measure name.
+  if (w.dataset && (!w.values || w.values.length === 0)) {
+    ctx.addIssue({
+      code: 'custom',
+      message: 'a dataset-bound widget needs `values` (measure names from the dataset).',
+      path: ['values'],
+    });
+  }
 }));
 
 /**