diff --git a/.changeset/20647-analytics-result-object.md b/.changeset/20647-analytics-result-object.md
new file mode 100644
index 00000000000..204951b6086
--- /dev/null
+++ b/.changeset/20647-analytics-result-object.md
@@ -0,0 +1,23 @@
+---
+'@objectstack/spec': minor
+---
+
+feat(spec): a dataset answer declares its base object as `object` (#20647)
+
+Clause-②: yes (widening)
+
+`AnalyticsResult` (`@objectstack/spec/contracts`) gains one optional member,
+`object?: string`, and `AnalyticsResultResponseSchema` (`@objectstack/spec/api`)
+mirrors it on `data`. It is the base object of the dataset the answer was
+computed from, by machine name. Nothing is removed or renamed, and no existing
+member changes meaning.
+
+**For a consumer.** Code typed against `AnalyticsResult` can read `object` from a
+`queryDataset` answer without a cast, and a parse with
+`AnalyticsResultResponseSchema` keeps `data.object` where it used to strip it. The
+contract asks every dataset answer to carry it, whatever dimensions are selected
+and whether or not rows came back. A cube query answer has no dataset behind it
+and carries none.
+
+**Producers.** This release declares the member. `@objectstack/service-analytics`
+sets it on every dataset answer once #20644 lands.
diff --git a/content/docs/references/api/analytics.mdx b/content/docs/references/api/analytics.mdx
index 04247636123..670af459206 100644
--- a/content/docs/references/api/analytics.mdx
+++ b/content/docs/references/api/analytics.mdx
@@ -122,7 +122,7 @@ const result = AnalyticsEndpoint.parse(data);
 | **success** | `boolean` | ✅ | Operation success status |
 | **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| …>; declaredCode?: string; message: string; userMessage?: string; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: integer; requestId?: string; traceId?: string }` | optional | Response metadata |
-| **data** | `{ rows: Record<string, any>[]; fields: object[]; sql?: string; totals?: object[] }` | ✅ |  |
+| **data** | `{ rows: Record<string, any>[]; fields: object[]; sql?: string; totals?: object[]; … }` | ✅ |  |
 
 ### Nested Shape: `AnalyticsResultResponse.error`
 
@@ -155,6 +155,7 @@ const result = AnalyticsEndpoint.parse(data);
 | **fields** | `{ name: string; type: string; label?: string; format?: string; … }[]` | ✅ | Column metadata |
 | **sql** | `string` | optional | Executed SQL (if debug enabled) |
 | **totals** | `{ dimensions: string[]; rows: Record<string, any>[] }[]` | optional | Marginal aggregates - one entry per requested totals grouping, in request order, each computed with the measure's true aggregate over the underlying data (never re-derived from bucketed values). The grand-total grouping yields a single dimensionless row. |
+| **object** | `string` | optional | The base object of the dataset the answer was computed from: the dataset's `object`, by machine name. Every dataset answer (`POST /analytics/dataset/query`) must carry it, whatever dimensions are selected and whether or not rows came back, so a consumer can refresh on that object's record changes and drill into its records. Absent on a cube query answer, which has no dataset behind it. |
 
 
 ---
diff --git a/packages/spec/src/api/analytics.test.ts b/packages/spec/src/api/analytics.test.ts
index ce7add708a7..643b5c50df9 100644
--- a/packages/spec/src/api/analytics.test.ts
+++ b/packages/spec/src/api/analytics.test.ts
@@ -254,6 +254,30 @@ describe('AnalyticsResultResponseSchema', () => {
     expect(resp.data.totals?.[1].rows[0].revenue).toBe(250);
   });
 
+  // `data.object` — the dataset's base object, which a consumer keys its
+  // record-change refresh on. The answer that most needs it is the one with no
+  // dimensions and no rows (a KPI tile before its first record), so that is the
+  // payload pinned. Preservation, not just acceptance: this schema strips an
+  // undeclared key, so an undeclared `object` would parse green and vanish.
+  it('should preserve data.object — the dataset base object — on a dimension-less, zero-row answer', () => {
+    const resp = AnalyticsResultResponseSchema.parse({
+      success: true,
+      data: { rows: [], fields: [{ name: 'count', type: 'number' }], object: 'showcase_project' },
+    });
+    expect(resp.data.object).toBe('showcase_project');
+
+    // Optional: a cube query answer carries none, and still parses.
+    const cube = AnalyticsResultResponseSchema.parse({ success: true, data: { rows: [], fields: [] } });
+    expect('object' in cube.data).toBe(false);
+
+    const bad = AnalyticsResultResponseSchema.safeParse({
+      success: true,
+      data: { rows: [], fields: [], object: 42 },
+    });
+    expect(bad.success).toBe(false);
+    expect(bad.success ? [] : bad.error.issues.map((i) => i.path.join('.'))).toContain('data.object');
+  });
+
   it('should reject a percentScale outside the closed vocabulary, and a totals entry without dimensions', () => {
     expect(() =>
       AnalyticsResultResponseSchema.parse({
diff --git a/packages/spec/src/api/analytics.zod.ts b/packages/spec/src/api/analytics.zod.ts
index 72361f58b1a..802e3c3e79d 100644
--- a/packages/spec/src/api/analytics.zod.ts
+++ b/packages/spec/src/api/analytics.zod.ts
@@ -142,6 +142,13 @@ export const AnalyticsResultResponseSchema = lazySchema(() => BaseResponseSchema
       + 'the underlying data (never re-derived from bucketed values). The '
       + 'grand-total grouping yields a single dimensionless row.',
     ),
+    object: z.string().optional().describe(
+      'The base object of the dataset the answer was computed from: the dataset\'s '
+      + '`object`, by machine name. Every dataset answer (`POST /analytics/dataset/query`) '
+      + 'must carry it, whatever dimensions are selected and whether or not rows came '
+      + 'back, so a consumer can refresh on that object\'s record changes and drill '
+      + 'into its records. Absent on a cube query answer, which has no dataset behind it.',
+    ),
   }),
 }));
 
diff --git a/packages/spec/src/contracts/analytics-service.test.ts b/packages/spec/src/contracts/analytics-service.test.ts
index de4c01c0920..65becfcfa53 100644
--- a/packages/spec/src/contracts/analytics-service.test.ts
+++ b/packages/spec/src/contracts/analytics-service.test.ts
@@ -88,6 +88,33 @@ describe('Analytics Service Contract', () => {
     expect(offEnum.name).toBe('count');
   });
 
+  // `object` — the dataset's base object, declared on the answer itself and not
+  // on a drill-through side type: a `queryDataset` implementation returns it on
+  // a dimension-less, zero-row answer against the plain `AnalyticsResult`, and
+  // the member is a string (a non-string is refused at compile time).
+  it('carries the dataset base object as `object` on a dimension-less, zero-row dataset answer', async () => {
+    const service: IAnalyticsService = {
+      query: async () => ({ rows: [], fields: [] }),
+      getMeta: async () => [],
+      queryDataset: async (dataset) => ({ rows: [], fields: [{ name: 'count', type: 'number' }], object: dataset.object }),
+    };
+
+    const answer = await service.queryDataset!(
+      { name: 'projects', label: 'Projects', object: 'project', dimensions: [], measures: [{ name: 'count', aggregate: 'count' }] },
+      { measures: ['count'] },
+    );
+    expect(answer.object).toBe('project');
+    expect(answer.rows).toEqual([]);
+
+    const offType: AnalyticsResult = {
+      rows: [],
+      fields: [],
+      // @ts-expect-error — `object` is the base object's machine name, a string
+      object: 42,
+    };
+    expect(offType.rows).toEqual([]);
+  });
+
   it('should generate SQL without executing', async () => {
     const service: IAnalyticsService = {
       query: async () => ({ rows: [], fields: [] }),
diff --git a/packages/spec/src/contracts/analytics-service.ts b/packages/spec/src/contracts/analytics-service.ts
index 7df0e29ca6d..7a65f2bb099 100644
--- a/packages/spec/src/contracts/analytics-service.ts
+++ b/packages/spec/src/contracts/analytics-service.ts
@@ -132,6 +132,21 @@ export interface AnalyticsResult {
         dimensions: string[];
         rows: Record<string, unknown>[];
     }>;
+    /**
+     * The base object of the dataset the answer was computed from: the
+     * dataset's own `object` (`DatasetSchema.object`, its FROM), by machine
+     * name. A consumer keys two things on it — refreshing when that object's
+     * records change, and drilling a clicked value into those records.
+     *
+     * The contract, for `queryDataset`: EVERY dataset answer must carry it,
+     * whatever dimensions are selected and whether or not rows came back — a
+     * dimension-less KPI answer and a zero-row answer included. It names the
+     * answer's subject, so it does not depend on the selection having a
+     * drillable dimension.
+     *
+     * Absent on a `query` (cube) answer, which has no dataset behind it.
+     */
+    object?: string;
 }
 
 /**