diff --git a/README.md b/README.md
index 7940518..5e322d9 100644
--- a/README.md
+++ b/README.md
@@ -68,7 +68,7 @@ Select workflow:
 **2. Isolated clone** (optional)
 
 ```
-? Create worktree? (y/N)
+? Create worktree? (Y/n)
 ```
 
 Choose `y` to run in a `git clone --shared` isolated environment, keeping your working directory clean.
diff --git a/docs/README.ja.md b/docs/README.ja.md
index 588b893..102cc69 100644
--- a/docs/README.ja.md
+++ b/docs/README.ja.md
@@ -64,7 +64,7 @@ Select workflow:
 **2. 隔離クローン作成**（オプション）
 
 ```
-? Create worktree? (y/N)
+? Create worktree? (Y/n)
 ```
 
 `y` を選ぶと `git clone --shared` で隔離環境を作成し、作業ディレクトリをクリーンに保てます。
diff --git a/src/__tests__/cli-worktree.test.ts b/src/__tests__/cli-worktree.test.ts
index a46a6f6..614b03c 100644
--- a/src/__tests__/cli-worktree.test.ts
+++ b/src/__tests__/cli-worktree.test.ts
@@ -154,7 +154,7 @@ describe('confirmAndCreateWorktree', () => {
     );
   });
 
-  it('should call confirm with default=false', async () => {
+  it('should call confirm with default=true', async () => {
     // Given
     mockConfirm.mockResolvedValue(false);
 
@@ -162,7 +162,7 @@ describe('confirmAndCreateWorktree', () => {
     await confirmAndCreateWorktree('/project', 'task');
 
     // Then
-    expect(mockConfirm).toHaveBeenCalledWith('Create worktree?', false);
+    expect(mockConfirm).toHaveBeenCalledWith('Create worktree?', true);
   });
 
   it('should summarize Japanese task name to English slug', async () => {
diff --git a/src/cli.ts b/src/cli.ts
index 940ee9c..8ae340c 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -131,7 +131,7 @@ export async function confirmAndCreateWorktree(
   cwd: string,
   task: string,
 ): Promise<WorktreeConfirmationResult> {
-  const useWorktree = await confirm('Create worktree?', false);
+  const useWorktree = await confirm('Create worktree?', true);
 
   if (!useWorktree) {
     return { execCwd: cwd, isWorktree: false };
diff --git a/src/commands/addTask.ts b/src/commands/addTask.ts
index 357d8ab..9cdd174 100644
--- a/src/commands/addTask.ts
+++ b/src/commands/addTask.ts
@@ -113,7 +113,7 @@ export async function addTask(cwd: string, task?: string): Promise<void> {
   let branch: string | undefined;
   let workflow: string | undefined;
 
-  const useWorktree = await confirm('Create worktree?', false);
+  const useWorktree = await confirm('Create worktree?', true);
   if (useWorktree) {
     const customPath = await promptInput('Worktree path (Enter for auto)');
     worktree = customPath || true;