diff --git a/.changeset/16894-kanban-config-titlefield.md b/.changeset/16894-kanban-config-titlefield.md
new file mode 100644
index 00000000000..f35f9c0ebae
--- /dev/null
+++ b/.changeset/16894-kanban-config-titlefield.md
@@ -0,0 +1,13 @@
+---
+"@objectstack/spec": minor
+---
+
+`KanbanConfigSchema` now declares `titleField` — optional `z.string()`, the key the board already reads and the schema refused by name (#16894).
+
+`KanbanConfigSchema` is a `strictObject`, and it was the one item-titled view config of its family that omitted the key: `GalleryConfigSchema`, `TimelineConfigSchema`, `CalendarConfigSchema`, `GanttConfigSchema` and `ListMapConfigSchema` all declare `titleField` under the same name and the same `z.string()`. An author writing `kanban: { titleField: 'subject' }` — the spelling the renderer honours — was refused with `unrecognized_keys=["titleField"]`, while objectui's own mirror accepted it only by not looking. Declared here under the director seat's decision batch #87 (objectstack-ai/objectui#8367), confirmed by the maintainer verbatim 「批 #87 同意」.
+
+**Clause-②: yes (widening)** — one new declared key on a published, strict accept set, so the set a consumer writes against grows. Nothing previously admitted is refused, and nothing is retired. Contract-review tier.
+
+- **Optional, not required.** The shape is the one `CalendarConfigSchema` already writes down for this exact key: absence resolves through the ADR-0079 record display-name chain (`titleFormat` → `displayNameField` → type-aware derivation → `'Untitled'`), so requiring it would demand more than the renderer reads — the shape ruling #13748 forbids (「不要求超过渲染器真正需要的」). `TimelineConfigSchema` and `GanttConfigSchema` spell it required and are the two siblings this declaration deliberately does not copy.
+- **No migration, no tombstone.** Nothing moves or is renamed: a board authored before this release parses unchanged, and `kanban.titleField` is simply no longer refused.
+- **The generated projections move with it** — `authorable-surface/ui.json` gains `ui/KanbanConfig:titleField`, and the `ListView` / `ObjectListView` kanban shape lines in `content/docs/references/ui/view.mdx`, `content/docs/references/api/protocol.mdx` and `content/docs/references/data/object.mdx` gain `titleField?: string`.
diff --git a/content/docs/references/api/protocol.mdx b/content/docs/references/api/protocol.mdx
index b6fd069ff8b..f34ecca6796 100644
--- a/content/docs/references/api/protocol.mdx
+++ b/content/docs/references/api/protocol.mdx
@@ -1640,7 +1640,7 @@ The published metadata item body, opaque by ruling (1C). Shape is the item's own
 | **selection** | `{ type?: Enum<'none' \| 'single' \| 'multiple'> }` | optional | Row selection configuration |
 | **navigation** | `{ mode?: Enum<'page' \| 'drawer' \| 'modal' \| 'split' \| 'popover' \| 'new_window' \| 'none'>; view?: string; preventNavigation?: boolean; openNewTab?: boolean; … }` | optional | Configuration for item click navigation (page, drawer, modal, etc.) |
 | **pagination** | `{ pageSize?: integer; pageSizeOptions?: integer[] }` | optional | Pagination configuration |
-| **kanban** | `{ groupByField: string; summarizeField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
+| **kanban** | `{ groupByField: string; summarizeField?: string; titleField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
 | **calendar** | `{ startDateField: string; endDateField?: string; titleField?: string; colorField?: string; … }` | optional | Calendar configuration — applies when the view renders as a calendar layout |
 | **gantt** | `{ startDateField: string; endDateField: string; titleField: string; progressField?: string; … }` | optional | Gantt-timeline configuration — applies when the view renders as a gantt layout |
 | **gallery** | `{ coverField?: string; coverFit?: Enum<'cover' \| 'contain'>; cardSize?: Enum<'small' \| 'medium' \| 'large'>; titleField?: string; … }` | optional | Gallery/card view configuration |
@@ -1725,7 +1725,7 @@ The published metadata item body, opaque by ruling (1C). Shape is the item's own
 | **selection** | `{ type?: Enum<'none' \| 'single' \| 'multiple'> }` | optional | Row selection configuration |
 | **navigation** | `{ mode?: Enum<'page' \| 'drawer' \| 'modal' \| 'split' \| 'popover' \| 'new_window' \| 'none'>; view?: string; preventNavigation?: boolean; openNewTab?: boolean; … }` | optional | Configuration for item click navigation (page, drawer, modal, etc.) |
 | **pagination** | `{ pageSize?: integer; pageSizeOptions?: integer[] }` | optional | Pagination configuration |
-| **kanban** | `{ groupByField: string; summarizeField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
+| **kanban** | `{ groupByField: string; summarizeField?: string; titleField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
 | **calendar** | `{ startDateField: string; endDateField?: string; titleField?: string; colorField?: string; … }` | optional | Calendar configuration — applies when the view renders as a calendar layout |
 | **gantt** | `{ startDateField: string; endDateField: string; titleField: string; progressField?: string; … }` | optional | Gantt-timeline configuration — applies when the view renders as a gantt layout |
 | **gallery** | `{ coverField?: string; coverFit?: Enum<'cover' \| 'contain'>; cardSize?: Enum<'small' \| 'medium' \| 'large'>; titleField?: string; … }` | optional | Gallery/card view configuration |
diff --git a/content/docs/references/data/object.mdx b/content/docs/references/data/object.mdx
index d060942dc50..24152b29e25 100644
--- a/content/docs/references/data/object.mdx
+++ b/content/docs/references/data/object.mdx
@@ -374,7 +374,7 @@ const result = ApiMethod.parse(data);
 | **selection** | `{ type?: Enum<'none' \| 'single' \| 'multiple'> }` | optional | Row selection configuration |
 | **navigation** | `{ mode?: Enum<'page' \| 'drawer' \| 'modal' \| 'split' \| 'popover' \| 'new_window' \| 'none'>; view?: string; preventNavigation?: boolean; openNewTab?: boolean; … }` | optional | Configuration for item click navigation (page, drawer, modal, etc.) |
 | **pagination** | `{ pageSize?: integer; pageSizeOptions?: integer[] }` | optional | Pagination configuration |
-| **kanban** | `{ groupByField: string; summarizeField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
+| **kanban** | `{ groupByField: string; summarizeField?: string; titleField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
 | **calendar** | `{ startDateField: string; endDateField?: string; titleField?: string; colorField?: string; … }` | optional | Calendar configuration — applies when the view renders as a calendar layout |
 | **gantt** | `{ startDateField: string; endDateField: string; titleField: string; progressField?: string; … }` | optional | Gantt-timeline configuration — applies when the view renders as a gantt layout |
 | **gallery** | `{ coverField?: string; coverFit?: Enum<'cover' \| 'contain'>; cardSize?: Enum<'small' \| 'medium' \| 'large'>; titleField?: string; … }` | optional | Gallery/card view configuration |
diff --git a/content/docs/references/ui/view.mdx b/content/docs/references/ui/view.mdx
index 3bf385bc51c..476d8fe7675 100644
--- a/content/docs/references/ui/view.mdx
+++ b/content/docs/references/ui/view.mdx
@@ -698,6 +698,7 @@ HTTP methods a view data source may request — the subset of `HttpMethod` witho
 | :--- | :--- | :--- | :--- |
 | **groupByField** | `string` | ✅ | Field to group columns by (usually status/select) |
 | **summarizeField** | `string` | optional | Field to sum at top of column (e.g. amount) |
+| **titleField** | `string` | optional | Field displayed as the card title. Omit to fall back to the record display name (ADR-0079 resolver chain) |
 | **columns** | `string[]` | ✅ | Fields to show on cards |
 
 
@@ -799,7 +800,7 @@ Map view configuration
 | **selection** | `{ type?: Enum<'none' \| 'single' \| 'multiple'> }` | optional | Row selection configuration |
 | **navigation** | `{ mode?: Enum<'page' \| 'drawer' \| 'modal' \| 'split' \| 'popover' \| 'new_window' \| 'none'>; view?: string; preventNavigation?: boolean; openNewTab?: boolean; … }` | optional | Configuration for item click navigation (page, drawer, modal, etc.) |
 | **pagination** | `{ pageSize?: integer; pageSizeOptions?: integer[] }` | optional | Pagination configuration |
-| **kanban** | `{ groupByField: string; summarizeField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
+| **kanban** | `{ groupByField: string; summarizeField?: string; titleField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
 | **calendar** | `{ startDateField: string; endDateField?: string; titleField?: string; colorField?: string; … }` | optional | Calendar configuration — applies when the view renders as a calendar layout |
 | **gantt** | `{ startDateField: string; endDateField: string; titleField: string; progressField?: string; … }` | optional | Gantt-timeline configuration — applies when the view renders as a gantt layout |
 | **gallery** | `{ coverField?: string; coverFit?: Enum<'cover' \| 'contain'>; cardSize?: Enum<'small' \| 'medium' \| 'large'>; titleField?: string; … }` | optional | Gallery/card view configuration |
@@ -934,6 +935,7 @@ View filter rule
 | :--- | :--- | :--- | :--- |
 | **groupByField** | `string` | ✅ | Field to group columns by (usually status/select) |
 | **summarizeField** | `string` | optional | Field to sum at top of column (e.g. amount) |
+| **titleField** | `string` | optional | Field displayed as the card title. Omit to fall back to the record display name (ADR-0079 resolver chain) |
 | **columns** | `string[]` | ✅ | Fields to show on cards |
 
 ### Nested Shape: `ListView.calendar`
@@ -1205,7 +1207,7 @@ Tab configuration for multi-tab view interface
 | **selection** | `{ type?: Enum<'none' \| 'single' \| 'multiple'> }` | optional | Row selection configuration |
 | **navigation** | `{ mode?: Enum<'page' \| 'drawer' \| 'modal' \| 'split' \| 'popover' \| 'new_window' \| 'none'>; view?: string; preventNavigation?: boolean; openNewTab?: boolean; … }` | optional | Configuration for item click navigation (page, drawer, modal, etc.) |
 | **pagination** | `{ pageSize?: integer; pageSizeOptions?: integer[] }` | optional | Pagination configuration |
-| **kanban** | `{ groupByField: string; summarizeField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
+| **kanban** | `{ groupByField: string; summarizeField?: string; titleField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
 | **calendar** | `{ startDateField: string; endDateField?: string; titleField?: string; colorField?: string; … }` | optional | Calendar configuration — applies when the view renders as a calendar layout |
 | **gantt** | `{ startDateField: string; endDateField: string; titleField: string; progressField?: string; … }` | optional | Gantt-timeline configuration — applies when the view renders as a gantt layout |
 | **gallery** | `{ coverField?: string; coverFit?: Enum<'cover' \| 'contain'>; cardSize?: Enum<'small' \| 'medium' \| 'large'>; titleField?: string; … }` | optional | Gallery/card view configuration |
@@ -1331,6 +1333,7 @@ View filter rule
 | :--- | :--- | :--- | :--- |
 | **groupByField** | `string` | ✅ | Field to group columns by (usually status/select) |
 | **summarizeField** | `string` | optional | Field to sum at top of column (e.g. amount) |
+| **titleField** | `string` | optional | Field displayed as the card title. Omit to fall back to the record display name (ADR-0079 resolver chain) |
 | **columns** | `string[]` | ✅ | Fields to show on cards |
 
 ### Nested Shape: `ObjectListView.calendar`
@@ -1802,7 +1805,7 @@ Tab configuration for multi-tab view interface
 | **selection** | `{ type?: Enum<'none' \| 'single' \| 'multiple'> }` | optional | Row selection configuration |
 | **navigation** | `{ mode?: Enum<'page' \| 'drawer' \| 'modal' \| 'split' \| 'popover' \| 'new_window' \| 'none'>; view?: string; preventNavigation?: boolean; openNewTab?: boolean; … }` | optional | Configuration for item click navigation (page, drawer, modal, etc.) |
 | **pagination** | `{ pageSize?: integer; pageSizeOptions?: integer[] }` | optional | Pagination configuration |
-| **kanban** | `{ groupByField: string; summarizeField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
+| **kanban** | `{ groupByField: string; summarizeField?: string; titleField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
 | **calendar** | `{ startDateField: string; endDateField?: string; titleField?: string; colorField?: string; … }` | optional | Calendar configuration — applies when the view renders as a calendar layout |
 | **gantt** | `{ startDateField: string; endDateField: string; titleField: string; progressField?: string; … }` | optional | Gantt-timeline configuration — applies when the view renders as a gantt layout |
 | **gallery** | `{ coverField?: string; coverFit?: Enum<'cover' \| 'contain'>; cardSize?: Enum<'small' \| 'medium' \| 'large'>; titleField?: string; … }` | optional | Gallery/card view configuration |
@@ -1887,7 +1890,7 @@ Tab configuration for multi-tab view interface
 | **selection** | `{ type?: Enum<'none' \| 'single' \| 'multiple'> }` | optional | Row selection configuration |
 | **navigation** | `{ mode?: Enum<'page' \| 'drawer' \| 'modal' \| 'split' \| 'popover' \| 'new_window' \| 'none'>; view?: string; preventNavigation?: boolean; openNewTab?: boolean; … }` | optional | Configuration for item click navigation (page, drawer, modal, etc.) |
 | **pagination** | `{ pageSize?: integer; pageSizeOptions?: integer[] }` | optional | Pagination configuration |
-| **kanban** | `{ groupByField: string; summarizeField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
+| **kanban** | `{ groupByField: string; summarizeField?: string; titleField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
 | **calendar** | `{ startDateField: string; endDateField?: string; titleField?: string; colorField?: string; … }` | optional | Calendar configuration — applies when the view renders as a calendar layout |
 | **gantt** | `{ startDateField: string; endDateField: string; titleField: string; progressField?: string; … }` | optional | Gantt-timeline configuration — applies when the view renders as a gantt layout |
 | **gallery** | `{ coverField?: string; coverFit?: Enum<'cover' \| 'contain'>; cardSize?: Enum<'small' \| 'medium' \| 'large'>; titleField?: string; … }` | optional | Gallery/card view configuration |
@@ -2128,7 +2131,7 @@ This schema accepts one of the following structures:
 | **selection** | `{ type?: Enum<'none' \| 'single' \| 'multiple'> }` | optional | Row selection configuration |
 | **navigation** | `{ mode?: Enum<'page' \| 'drawer' \| 'modal' \| 'split' \| 'popover' \| 'new_window' \| 'none'>; view?: string; preventNavigation?: boolean; openNewTab?: boolean; … }` | optional | Configuration for item click navigation (page, drawer, modal, etc.) |
 | **pagination** | `{ pageSize?: integer; pageSizeOptions?: integer[] }` | optional | Pagination configuration |
-| **kanban** | `{ groupByField: string; summarizeField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
+| **kanban** | `{ groupByField: string; summarizeField?: string; titleField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
 | **calendar** | `{ startDateField: string; endDateField?: string; titleField?: string; colorField?: string; … }` | optional | Calendar configuration — applies when the view renders as a calendar layout |
 | **gantt** | `{ startDateField: string; endDateField: string; titleField: string; progressField?: string; … }` | optional | Gantt-timeline configuration — applies when the view renders as a gantt layout |
 | **gallery** | `{ coverField?: string; coverFit?: Enum<'cover' \| 'contain'>; cardSize?: Enum<'small' \| 'medium' \| 'large'>; titleField?: string; … }` | optional | Gallery/card view configuration |
@@ -2304,7 +2307,7 @@ This schema accepts one of the following structures:
 | **selection** | `{ type?: Enum<'none' \| 'single' \| 'multiple'> }` | optional | Row selection configuration |
 | **navigation** | `{ mode?: Enum<'page' \| 'drawer' \| 'modal' \| 'split' \| 'popover' \| 'new_window' \| 'none'>; view?: string; preventNavigation?: boolean; openNewTab?: boolean; … }` | optional | Configuration for item click navigation (page, drawer, modal, etc.) |
 | **pagination** | `{ pageSize?: integer; pageSizeOptions?: integer[] }` | optional | Pagination configuration |
-| **kanban** | `{ groupByField: string; summarizeField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
+| **kanban** | `{ groupByField: string; summarizeField?: string; titleField?: string; columns: string[] }` | optional | Kanban-board configuration — applies when the view renders as a kanban layout |
 | **calendar** | `{ startDateField: string; endDateField?: string; titleField?: string; colorField?: string; … }` | optional | Calendar configuration — applies when the view renders as a calendar layout |
 | **gantt** | `{ startDateField: string; endDateField: string; titleField: string; progressField?: string; … }` | optional | Gantt-timeline configuration — applies when the view renders as a gantt layout |
 | **gallery** | `{ coverField?: string; coverFit?: Enum<'cover' \| 'contain'>; cardSize?: Enum<'small' \| 'medium' \| 'large'>; titleField?: string; … }` | optional | Gallery/card view configuration |
diff --git a/packages/spec/authorable-surface/ui.json b/packages/spec/authorable-surface/ui.json
index 4048f035433..89a82028b71 100644
--- a/packages/spec/authorable-surface/ui.json
+++ b/packages/spec/authorable-surface/ui.json
@@ -596,6 +596,7 @@
     "ui/KanbanConfig:columns",
     "ui/KanbanConfig:groupByField",
     "ui/KanbanConfig:summarizeField",
+    "ui/KanbanConfig:titleField",
     "ui/ListChartConfig:chartType",
     "ui/ListChartConfig:dataset",
     "ui/ListChartConfig:dimensions",
diff --git a/packages/spec/src/ui/view.test.ts b/packages/spec/src/ui/view.test.ts
index 99a9235a326..05386b001bd 100644
--- a/packages/spec/src/ui/view.test.ts
+++ b/packages/spec/src/ui/view.test.ts
@@ -182,6 +182,45 @@ describe('KanbanConfigSchema', () => {
 
     expect(() => KanbanConfigSchema.parse(config)).not.toThrow();
   });
+
+  // [#16894] Director seat, decision batch #87 (objectstack-ai/objectui#8367,
+  // maintainer 「批 #87 同意」): `titleField` joins this schema as optional
+  // `z.string()`. The legs below are the card's executable acceptance
+  // criterion — BOTH controls fire on the same call shape, so the PROBE's flip
+  // is evidence about the NAME and not about a parser that stopped refusing.
+  it('ACCEPTS `titleField` as a member, with both controls firing on the same shape', () => {
+    const canonical = {
+      groupByField: 'status',
+      columns: ['name', 'owner'],
+    };
+
+    // CONTROL-1 — the parser CAN refuse, on the named surface.
+    const control1 = KanbanConfigSchema.safeParse({ ...canonical, zzUnlikelyBogusKey__: true });
+    expect(control1.success).toBe(false);
+    const issues = JSON.stringify(control1.error?.issues);
+    expect(issues).toContain('unrecognized_keys');
+    expect(issues).toContain('zzUnlikelyBogusKey__');
+    expect(issues).toContain('this kanban configuration');
+
+    // CONTROL-2 — a refusal is about the name: the canonical block is accepted.
+    expect(KanbanConfigSchema.safeParse(canonical).success).toBe(true);
+
+    // PROBE — before this card: `ok=false unrecognized_keys=["titleField"]`.
+    const probe = KanbanConfigSchema.safeParse({ ...canonical, titleField: 'subject' });
+    expect(probe.success).toBe(true);
+    // Accepted as a MEMBER, not merely tolerated: the value survives the parse.
+    expect(KanbanConfigSchema.parse({ ...canonical, titleField: 'subject' }))
+      .toMatchObject({ titleField: 'subject' });
+  });
+
+  // ⛔ NOT required. `TimelineConfigSchema` and `GanttConfigSchema` spell
+  // `titleField` required and are the two siblings this declaration does not
+  // copy: absence resolves through the ADR-0079 record display-name chain, so
+  // requiring it would demand more than the renderer reads (#13748).
+  it('leaves `titleField` OPTIONAL — a board that omits it is a complete config', () => {
+    const parsed = KanbanConfigSchema.parse({ groupByField: 'status', columns: ['name'] });
+    expect('titleField' in parsed).toBe(false);
+  });
 });
 
 describe('CalendarConfigSchema', () => {
diff --git a/packages/spec/src/ui/view.zod.ts b/packages/spec/src/ui/view.zod.ts
index 1d1cfd0bef6..a83fda5ae6f 100644
--- a/packages/spec/src/ui/view.zod.ts
+++ b/packages/spec/src/ui/view.zod.ts
@@ -1349,6 +1349,25 @@ export const KanbanConfigSchema = lazySchema(() => strictObject({
 }, {
   groupByField: z.string().describe('Field to group columns by (usually status/select)'),
   summarizeField: z.string().optional().describe('Field to sum at top of column (e.g. amount)'),
+  /**
+   * [#16894] The one item-titled view config of the family that omitted this
+   * key. `GalleryConfigSchema`, `TimelineConfigSchema`, `CalendarConfigSchema`,
+   * `GanttConfigSchema` and `ListMapConfigSchema` all declare `titleField`
+   * under the same name and the same `z.string()`; this schema is a
+   * `strictObject`, so an author writing the key the board actually reads was
+   * refused BY NAME while the renderer honoured it. Declared here under the
+   * director seat's decision batch #87 (objectstack-ai/objectui#8367).
+   *
+   * OPTIONAL, deliberately — the shape `CalendarConfigSchema` already writes
+   * down for this exact key. Absence resolves through the ADR-0079 record
+   * display-name chain (`titleFormat` -> `displayNameField` -> type-aware
+   * derivation -> `'Untitled'`), so requiring it would demand more than the
+   * renderer reads, the exact shape the #13748 ruling forbids
+   * (「不要求超过渲染器真正需要的」). `TimelineConfigSchema` and
+   * `GanttConfigSchema` spell it required; they are the two siblings this
+   * declaration does NOT copy.
+   */
+  titleField: z.string().optional().describe('Field displayed as the card title. Omit to fall back to the record display name (ADR-0079 resolver chain)'),
   columns: z.array(z.string()).describe('Fields to show on cards'),
 }));