diff --git a/.changeset/dashboard-aria-member-retired-5830.md b/.changeset/dashboard-aria-member-retired-5830.md
new file mode 100644
index 0000000000..a104aca90f
--- /dev/null
+++ b/.changeset/dashboard-aria-member-retired-5830.md
@@ -0,0 +1,16 @@
+---
+'@object-ui/types': minor
+---
+
+**Published TS surface narrowed:** `DashboardComponentSchema` no longer declares
+the `aria` member (`{ ariaLabel?, ariaDescribedBy?, role? }`). Its doc comment
+claimed alignment with `@objectstack/spec AriaPropsSchema`, but the spec removed
+`dashboard.aria` at the #3896 audit close-out — `DashboardSchema.shape.aria` is
+a tombstone that refuses any value and tells authors to delete the key — and no
+dashboard renderer ever read `schema.aria` (objectui#5830).
+
+What an author loses is the **type-level suggestion** only: the key was already
+refused at parse (the Zod twin inherits the spec tombstone by reference), and
+`BaseSchema`'s index signature means an existing `aria:` line still compiles.
+There is **no runtime behaviour change** — the key never rendered, and stored
+documents carrying it already failed validation before this release.
diff --git a/packages/types/src/__tests__/dashboard-aria-retired-contract-twins.test.ts b/packages/types/src/__tests__/dashboard-aria-retired-contract-twins.test.ts
new file mode 100644
index 0000000000..8c14cb7f43
--- /dev/null
+++ b/packages/types/src/__tests__/dashboard-aria-retired-contract-twins.test.ts
@@ -0,0 +1,84 @@
+/**
+ * ObjectUI
+ * Copyright (c) 2024-present ObjectStack Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+/**
+ * Retirement pin — `DashboardComponentSchema.aria` (objectui#5830).
+ *
+ * The spec removed `dashboard.aria` at the #3896 audit close-out ("no
+ * dashboard renderer ever applied it"): `DashboardSchema.shape.aria` in
+ * `@objectstack/spec/ui` is a tombstone that refuses any value and tells
+ * authors to delete the key. objectui's Zod twin inherits that refusal by
+ * reference (`SpecDashboardFields`, `zod/complex.zod.ts` — `aria` is not in
+ * its exclusion list), and `packages/plugin-dashboard/src` has no
+ * `schema.aria` read site (pinned by that package's
+ * `dashboardAuthoredInputs.test.tsx`). The TS interface was the last surface
+ * still DECLARING the key — under a comment claiming alignment with
+ * `AriaPropsSchema`, the opposite of the contract: the member-level instance
+ * of #4631's "declared surfaces disagree".
+ *
+ * What the deletion changes at the type level, stated honestly: `BaseSchema`
+ * carries `[key: string]: any`, so an authored `aria:` on a dashboard literal
+ * still COMPILES after the removal — it falls to the index signature. A
+ * `@ts-expect-error` pin on an authored literal therefore cannot stick here
+ * (unlike `default-children-retired-contract-twins.test.ts`, whose interface
+ * has no index signature). The pinnable effect is that `aria` stops being a
+ * DECLARED member: the probe below extracts the interface's literal key set —
+ * the index signature is filtered out by `string extends K` — and asserts
+ * `aria` is out while its former neighbours stay in. Real enforcement because
+ * `packages/types/tsconfig.test.json` is chained from this package's
+ * `type-check` script (#3009).
+ */
+
+import { describe, it, expect } from 'vitest';
+import type { DashboardComponentSchema } from '../complex';
+import { DashboardComponentSchema as DashboardComponentZodSchema } from '../zod/index.zod';
+
+// Literal (declared) keys of T: `string extends K` is true only for the index
+// signature's key, so mapping it to `never` leaves exactly the authored members.
+type DeclaredKeys<T> = { [K in keyof T as string extends K ? never : K]: T[K] };
+type Declared = keyof DeclaredKeys<DashboardComponentSchema>;
+
+describe('the TS interface no longer declares `aria` (objectui#5830)', () => {
+  it('`aria` is not a declared member; the neighbours it stood beside still are', () => {
+    // Type-level pin, erased at runtime: if the member came back, the first
+    // annotation would collapse to `false` and this file would fail
+    // `type-check`. (Reverse-verified at the PR: with the member restored,
+    // `tsc -p tsconfig.test.json` goes red on exactly this line.)
+    const ariaNotDeclared: 'aria' extends Declared ? false : true = true;
+    // Positive controls through the same extraction: a probe that saw no
+    // members at all would also report `aria` absent.
+    const widgetsDeclared: 'widgets' extends Declared ? true : false = true;
+    const dateRangeDeclared: 'dateRange' extends Declared ? true : false = true;
+    expect(ariaNotDeclared && widgetsDeclared && dateRangeDeclared).toBe(true);
+  });
+});
+
+describe('the Zod twin refuses the key by name — the spec tombstone, inherited by reference', () => {
+  const legal = { type: 'dashboard' as const, widgets: [] };
+
+  it('a legal dashboard parses green — the control for the refusal below', () => {
+    expect(DashboardComponentZodSchema.safeParse(legal).success).toBe(true);
+  });
+
+  it('an arbitrary unknown key does not refuse — the red below is the tombstone, not strictness', () => {
+    // BaseSchema is not `.strict()`: an undeclared key rides through (or is
+    // stripped) but never refuses. So a red `aria` can only come from the
+    // DECLARED tombstone flowing in from the spec — the thing being pinned.
+    const r = DashboardComponentZodSchema.safeParse({ ...legal, objectui5830NotAKey: 'x' });
+    expect(r.success).toBe(true);
+  });
+
+  it('`aria` is refused at its own path, with the removal message', () => {
+    const r = DashboardComponentZodSchema.safeParse({ ...legal, aria: { ariaLabel: 'Ops' } });
+    expect(r.success).toBe(false);
+    if (r.success) return;
+    const issue = r.error.issues.find((i) => i.path.join('.') === 'aria');
+    expect(issue, 'no issue at path `aria`').toBeTruthy();
+    expect(issue!.message).toMatch(/removed/);
+  });
+});
diff --git a/packages/types/src/__tests__/p1-spec-alignment.test.ts b/packages/types/src/__tests__/p1-spec-alignment.test.ts
index a7a0f5b72b..e06f1449fe 100644
--- a/packages/types/src/__tests__/p1-spec-alignment.test.ts
+++ b/packages/types/src/__tests__/p1-spec-alignment.test.ts
@@ -606,17 +606,16 @@ describe('P1.6 i18n & ARIA Protocol Alignment', () => {
     expect(schema.aria?.live).toBe('polite');
   });
 
-  it('should accept ARIA props on DashboardComponentSchema', () => {
-    const schema: DashboardComponentSchema = {
-      type: 'dashboard',
-      widgets: [],
-      aria: {
-        ariaLabel: 'Sales Dashboard',
-        role: 'region',
-      },
-    };
-    expect(schema.aria?.ariaLabel).toBe('Sales Dashboard');
-  });
+  // `should accept ARIA props on DashboardComponentSchema` REMOVED
+  // (objectui#5830): the spec removed `dashboard.aria` at the #3896 audit
+  // close-out — `DashboardSchema.shape.aria` is a tombstone that refuses any
+  // value — and `packages/plugin-dashboard/src` has no `schema.aria` read site
+  // (measured for #5742; pinned by that package's
+  // `dashboardAuthoredInputs.test.tsx`). The declared member is gone from the
+  // TS interface too; had this test stayed, it would have kept passing through
+  // `BaseSchema`'s index signature while asserting the opposite of the
+  // contract. The removal is pinned by
+  // `dashboard-aria-retired-contract-twins.test.ts`.
 
   it('should accept ARIA props on PageNodeSchema', () => {
     const schema: PageNodeSchema = {
diff --git a/packages/types/src/complex.ts b/packages/types/src/complex.ts
index 25e25ebae2..acfc513120 100644
--- a/packages/types/src/complex.ts
+++ b/packages/types/src/complex.ts
@@ -844,15 +844,17 @@ export interface DashboardComponentSchema extends BaseSchema {
     defaultRange?: SpecDateRangeDefaultRange;
     allowCustomRange?: boolean;
   };
-  /**
-   * ARIA accessibility attributes.
-   * Aligned with @objectstack/spec AriaPropsSchema.
-   */
-  aria?: {
-    ariaLabel?: string;
-    ariaDescribedBy?: string;
-    role?: string;
-  };
+  // `aria` was DECLARED here until objectui#5830, under a comment claiming
+  // alignment with @objectstack/spec AriaPropsSchema — by then the opposite of
+  // the contract: the spec removed `dashboard.aria` at the #3896 audit
+  // close-out (no dashboard renderer ever applied it), so
+  // `DashboardSchema.shape.aria` is a tombstone that refuses any value, the
+  // Zod twin (`zod/complex.zod.ts`) inherits that refusal through
+  // `SpecDashboardFields`, and `plugin-dashboard` has no `schema.aria` read
+  // site. Note `BaseSchema`'s index signature still types an authored `aria`
+  // as `any` — this deletion removes the type-level suggestion and the false
+  // parity claim, not a key that ever rendered. Pinned by
+  // `__tests__/dashboard-aria-retired-contract-twins.test.ts`.
 }
 
 /**