diff --git a/ui/packages/components/src/renderers/action/__tests__/action-bar-danger-variant-26781.test.tsx b/ui/packages/components/src/renderers/action/__tests__/action-bar-danger-variant-26781.test.tsx
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+/**
+ * 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.
+ */
+
+/**
+ * objectstack#26781 — a declared `danger` action on `action:bar` draws with
+ * the destructive button style and confirms through the destructive button.
+ *
+ * The producer is `examples/app-todo`'s `DeleteCompletedAction`
+ * (`delete_completed`: `locations: ['list_toolbar']`, `variant: 'danger'`,
+ * `confirmText`). The list page hands an object's actions to `action:bar` as
+ * they are served, and `action:bar` spreads each one onto an `action:button`
+ * member with `variant: action.variant || schema.variant`. Before
+ * objectstack#26779 the Button primitive had no `danger` variant, so that
+ * member drew with no variant style and its confirm stayed neutral; the code
+ * path is fixed by `toButtonVariant` / `toRunnerVariant` (`../runner-variant`).
+ * `action-variant-confirm-26665.test.tsx` drives `action:button` / icon /
+ * group / menu directly; this file drives the declared action through the bar.
+ *
+ * The two fixtures copy the app-todo literals key for key, `ai` block
+ * included, because that is the shape the served metadata carries. The bar
+ * copies `objectViewHeaderToolbar.ts`'s list toolbar (`location`, `size`,
+ * `variant: 'outline'`), so the bar's own variant is in play. The control,
+ * app-todo's `export_csv` from the same toolbar, declares no variant and draws
+ * the bar's `outline`, which tells "the member drew its own variant" apart from
+ * "every member draws destructive".
+ *
+ * The confirm is read from the confirm handler's own call, the artefact the
+ * host's dialog (`ActionConfirmDialog` in `@object-ui/app-shell`) is drawn
+ * from: `destructive: true` is what paints its confirm button destructive.
+ */
+
+import { describe, it, expect, vi, beforeEach, type Mock } from 'vitest';
+import { render, screen, waitFor, fireEvent, within } from '@testing-library/react';
+import React from 'react';
+import { ComponentRegistry } from '@object-ui/core';
+import type { ActionContext, ActionDef, ActionResult, ConfirmationHandler } from '@object-ui/core';
+import { ActionProvider } from '@object-ui/react';
+// Module-scope side-effect imports: `action:bar` resolves its members and its
+// overflow menu through the ComponentRegistry at render time, and the light
+// `dom` project does not load the `@object-ui/components` graph. Module scope,
+// not a `beforeAll`, per AGENTS.md §测试纪律.
+import '../action-bar';
+import '../action-button';
+import '../action-menu';
+
+/** `examples/app-todo` `DeleteCompletedAction`, as declared. */
+const DELETE_COMPLETED = {
+  name: 'delete_completed',
+  label: 'Delete Completed',
+  objectName: 'todo_task',
+  icon: 'trash',
+  type: 'script',
+  target: 'deleteCompletedTasks',
+  locations: ['list_toolbar'],
+  variant: 'danger',
+  confirmText: 'Permanently delete all completed tasks? This cannot be undone.',
+  successMessage: 'Completed tasks deleted!',
+  refreshAfter: true,
+  ai: {
+    exposed: true,
+    description:
+      'Permanently delete every completed todo task. Destructive and irreversible — only after the user confirms.',
+  },
+};
+
+/** `examples/app-todo` `ExportToCsvAction`, as declared: the same toolbar, no variant. */
+const EXPORT_CSV = {
+  name: 'export_csv',
+  label: 'Export to CSV',
+  objectName: 'todo_task',
+  icon: 'download',
+  type: 'script',
+  target: 'exportTasksToCSV',
+  locations: ['list_toolbar'],
+  successMessage: 'Export completed!',
+  refreshAfter: false,
+  ai: {
+    exposed: true,
+    description: 'Export the current list of todo tasks to a downloadable CSV file.',
+  },
+};
+
+let script: Mock<(action: ActionDef, ctx: ActionContext) => Promise<ActionResult>>;
+let confirm: Mock<ConfirmationHandler>;
+
+beforeEach(() => {
+  script = vi.fn(async () => ({ success: true }));
+  // A cancel: the question is what is measured, not the run.
+  confirm = vi.fn(async () => false);
+});
+
+function renderToolbar() {
+  const Bar = ComponentRegistry.get('action:bar');
+  if (!Bar) throw new Error('action:bar is not registered');
+  const schema = {
+    type: 'action:bar',
+    location: 'list_toolbar',
+    actions: [DELETE_COMPLETED, EXPORT_CSV],
+    size: 'sm',
+    variant: 'outline',
+  };
+  render(
+    <ActionProvider handlers={{ script }} onConfirm={confirm}>
+      <Bar schema={schema as never} />
+    </ActionProvider>,
+  );
+  return screen.getByRole('toolbar');
+}
+
+describe('action:bar draws and confirms a declared `danger` action destructive (objectstack#26781)', () => {
+  it('the app-todo `delete_completed` member draws with the destructive button style', () => {
+    const toolbar = renderToolbar();
+    const del = within(toolbar).getByRole('button', { name: 'Delete Completed' });
+    expect(del.className).toContain('bg-destructive');
+    expect(del.className).not.toContain('border-input');
+  });
+
+  it('CONTROL: `export_csv` in the same bar declares no variant and draws the bar\'s `outline`', () => {
+    const toolbar = renderToolbar();
+    const csv = within(toolbar).getByRole('button', { name: 'Export to CSV' });
+    expect(csv.className).toContain('border-input');
+    expect(csv.className).not.toContain('bg-destructive');
+  });
+
+  it('clicking `delete_completed` asks its confirmText through the destructive confirm button', async () => {
+    const toolbar = renderToolbar();
+    fireEvent.click(within(toolbar).getByRole('button', { name: 'Delete Completed' }));
+    await waitFor(() => expect(confirm).toHaveBeenCalledTimes(1));
+    expect(script).not.toHaveBeenCalled();
+    const [message, options] = confirm.mock.calls[0];
+    expect(message).toBe(DELETE_COMPLETED.confirmText);
+    expect(options).toEqual({
+      title: 'Delete Completed',
+      confirmText: 'Delete Completed',
+      destructive: true,
+    });
+  });
+});