diff --git a/src/__tests__/cli-worktree.test.ts b/src/__tests__/cli-worktree.test.ts
new file mode 100644
index 0000000..5f8477a
--- /dev/null
+++ b/src/__tests__/cli-worktree.test.ts
@@ -0,0 +1,166 @@
+/**
+ * Tests for confirmAndCreateWorktree (CLI worktree confirmation flow)
+ */
+
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+
+// Mock dependencies before importing the module under test
+vi.mock('../prompt/index.js', () => ({
+  confirm: vi.fn(),
+  selectOptionWithDefault: vi.fn(),
+}));
+
+vi.mock('../task/worktree.js', () => ({
+  createWorktree: vi.fn(),
+}));
+
+vi.mock('../task/autoCommit.js', () => ({
+  autoCommitWorktree: vi.fn(),
+}));
+
+vi.mock('../utils/ui.js', () => ({
+  info: vi.fn(),
+  error: vi.fn(),
+  success: vi.fn(),
+  header: vi.fn(),
+  status: vi.fn(),
+  setLogLevel: vi.fn(),
+}));
+
+vi.mock('../utils/debug.js', () => ({
+  createLogger: () => ({
+    info: vi.fn(),
+    debug: vi.fn(),
+    error: vi.fn(),
+  }),
+  initDebugLogger: vi.fn(),
+  setVerboseConsole: vi.fn(),
+  getDebugLogFile: vi.fn(),
+}));
+
+vi.mock('../config/index.js', () => ({
+  initGlobalDirs: vi.fn(),
+  initProjectDirs: vi.fn(),
+  loadGlobalConfig: vi.fn(() => ({ logLevel: 'info' })),
+  getEffectiveDebugConfig: vi.fn(),
+}));
+
+vi.mock('../config/paths.js', () => ({
+  clearAgentSessions: vi.fn(),
+  getCurrentWorkflow: vi.fn(() => 'default'),
+  isVerboseMode: vi.fn(() => false),
+}));
+
+vi.mock('../commands/index.js', () => ({
+  executeTask: vi.fn(),
+  runAllTasks: vi.fn(),
+  showHelp: vi.fn(),
+  switchWorkflow: vi.fn(),
+  switchConfig: vi.fn(),
+  addTask: vi.fn(),
+  refreshBuiltin: vi.fn(),
+  watchTasks: vi.fn(),
+  reviewTasks: vi.fn(),
+}));
+
+vi.mock('../config/workflowLoader.js', () => ({
+  listWorkflows: vi.fn(() => []),
+}));
+
+vi.mock('../constants.js', () => ({
+  DEFAULT_WORKFLOW_NAME: 'default',
+}));
+
+import { confirm } from '../prompt/index.js';
+import { createWorktree } from '../task/worktree.js';
+import { info } from '../utils/ui.js';
+import { confirmAndCreateWorktree } from '../cli.js';
+
+const mockConfirm = vi.mocked(confirm);
+const mockCreateWorktree = vi.mocked(createWorktree);
+const mockInfo = vi.mocked(info);
+
+beforeEach(() => {
+  vi.clearAllMocks();
+});
+
+describe('confirmAndCreateWorktree', () => {
+  it('should return original cwd when user declines worktree creation', async () => {
+    // Given: user says "no" to worktree creation
+    mockConfirm.mockResolvedValue(false);
+
+    // When
+    const result = await confirmAndCreateWorktree('/project', 'fix-auth');
+
+    // Then
+    expect(result.execCwd).toBe('/project');
+    expect(result.isWorktree).toBe(false);
+    expect(mockCreateWorktree).not.toHaveBeenCalled();
+  });
+
+  it('should create worktree and return worktree path when user confirms', async () => {
+    // Given: user says "yes" to worktree creation
+    mockConfirm.mockResolvedValue(true);
+    mockCreateWorktree.mockReturnValue({
+      path: '/project/.takt/worktrees/20260128T0504-fix-auth',
+      branch: 'takt/20260128T0504-fix-auth',
+    });
+
+    // When
+    const result = await confirmAndCreateWorktree('/project', 'fix-auth');
+
+    // Then
+    expect(result.execCwd).toBe('/project/.takt/worktrees/20260128T0504-fix-auth');
+    expect(result.isWorktree).toBe(true);
+    expect(mockCreateWorktree).toHaveBeenCalledWith('/project', {
+      worktree: true,
+      taskSlug: 'fix-auth',
+    });
+  });
+
+  it('should display worktree info when created', async () => {
+    // Given
+    mockConfirm.mockResolvedValue(true);
+    mockCreateWorktree.mockReturnValue({
+      path: '/project/.takt/worktrees/20260128T0504-my-task',
+      branch: 'takt/20260128T0504-my-task',
+    });
+
+    // When
+    await confirmAndCreateWorktree('/project', 'my-task');
+
+    // Then
+    expect(mockInfo).toHaveBeenCalledWith(
+      'Worktree created: /project/.takt/worktrees/20260128T0504-my-task (branch: takt/20260128T0504-my-task)'
+    );
+  });
+
+  it('should call confirm with default=false', async () => {
+    // Given
+    mockConfirm.mockResolvedValue(false);
+
+    // When
+    await confirmAndCreateWorktree('/project', 'task');
+
+    // Then
+    expect(mockConfirm).toHaveBeenCalledWith('Create worktree?', false);
+  });
+
+  it('should pass task as taskSlug to createWorktree', async () => {
+    // Given: Japanese task name
+    mockConfirm.mockResolvedValue(true);
+    mockCreateWorktree.mockReturnValue({
+      path: '/project/.takt/worktrees/20260128T0504-task',
+      branch: 'takt/20260128T0504-task',
+    });
+
+    // When
+    await confirmAndCreateWorktree('/project', '認証機能を追加する');
+
+    // Then
+    expect(mockCreateWorktree).toHaveBeenCalledWith('/project', {
+      worktree: true,
+      taskSlug: '認証機能を追加する',
+    });
+  });
+});
diff --git a/src/cli.ts b/src/cli.ts
index 958255f..efb0d75 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -35,11 +35,41 @@ import {
   reviewTasks,
 } from './commands/index.js';
 import { listWorkflows } from './config/workflowLoader.js';
-import { selectOptionWithDefault } from './prompt/index.js';
+import { selectOptionWithDefault, confirm } from './prompt/index.js';
+import { createWorktree } from './task/worktree.js';
+import { autoCommitWorktree } from './task/autoCommit.js';
 import { DEFAULT_WORKFLOW_NAME } from './constants.js';
 
 const log = createLogger('cli');
 
+export interface WorktreeConfirmationResult {
+  execCwd: string;
+  isWorktree: boolean;
+}
+
+/**
+ * Ask user whether to create a worktree, and create one if confirmed.
+ * Returns the execution directory and whether a worktree was created.
+ */
+export async function confirmAndCreateWorktree(
+  cwd: string,
+  task: string,
+): Promise<WorktreeConfirmationResult> {
+  const useWorktree = await confirm('Create worktree?', false);
+
+  if (!useWorktree) {
+    return { execCwd: cwd, isWorktree: false };
+  }
+
+  const result = createWorktree(cwd, {
+    worktree: true,
+    taskSlug: task,
+  });
+  info(`Worktree created: ${result.path} (branch: ${result.branch})`);
+
+  return { execCwd: result.path, isWorktree: true };
+}
+
 const program = new Command();
 
 program
@@ -183,8 +213,21 @@ program
         selectedWorkflow = selected;
       }
 
-      log.info('Starting task execution', { task, workflow: selectedWorkflow });
-      const taskSuccess = await executeTask(task, cwd, selectedWorkflow);
+      // Ask whether to create a worktree
+      const { execCwd, isWorktree } = await confirmAndCreateWorktree(cwd, task);
+
+      log.info('Starting task execution', { task, workflow: selectedWorkflow, worktree: isWorktree });
+      const taskSuccess = await executeTask(task, execCwd, selectedWorkflow);
+
+      if (taskSuccess && isWorktree) {
+        const commitResult = autoCommitWorktree(execCwd, task);
+        if (commitResult.success && commitResult.commitHash) {
+          success(`Auto-committed: ${commitResult.commitHash}`);
+        } else if (!commitResult.success) {
+          error(`Auto-commit failed: ${commitResult.message}`);
+        }
+      }
+
       if (!taskSuccess) {
         process.exit(1);
       }