list コマンドのリファクタリング: non-interactive モード分離、delete アクション追加、console.log を info に統一

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "takt",
-  "version": "0.6.0-rc2",
+  "version": "0.6.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "takt",
-      "version": "0.6.0-rc2",
+      "version": "0.6.0",
       "license": "MIT",
       "dependencies": {
         "@anthropic-ai/claude-agent-sdk": "^0.2.19",

src/__tests__/listNonInteractive.test.ts

@@ -0,0 +1,181 @@
+/**
+ * Tests for listNonInteractive — non-interactive list output and branch actions.
+ */
+
+import { execFileSync } from 'node:child_process';
+import * as fs from 'node:fs';
+import * as path from 'node:path';
+import * as os from 'node:os';
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { listTasks } from '../features/tasks/list/index.js';
+
+describe('listTasks non-interactive text output', () => {
+  let tmpDir: string;
+
+  beforeEach(() => {
+    tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'takt-test-ni-'));
+    execFileSync('git', ['init', '--initial-branch', 'main'], { cwd: tmpDir, stdio: 'pipe' });
+    execFileSync('git', ['commit', '--allow-empty', '-m', 'init'], { cwd: tmpDir, stdio: 'pipe' });
+  });
+
+  afterEach(() => {
+    fs.rmSync(tmpDir, { recursive: true, force: true });
+  });
+
+  it('should output pending tasks in text format', async () => {
+    // Given
+    const tasksDir = path.join(tmpDir, '.takt', 'tasks');
+    fs.mkdirSync(tasksDir, { recursive: true });
+    fs.writeFileSync(path.join(tasksDir, 'my-task.md'), 'Fix the login bug');
+
+    const logSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+
+    // When
+    await listTasks(tmpDir, undefined, { enabled: true });
+
+    // Then
+    const calls = logSpy.mock.calls.map((c) => c[0] as string);
+    expect(calls).toContainEqual(expect.stringContaining('[pending] my-task'));
+    expect(calls).toContainEqual(expect.stringContaining('Fix the login bug'));
+    logSpy.mockRestore();
+  });
+
+  it('should output failed tasks in text format', async () => {
+    // Given
+    const failedDir = path.join(tmpDir, '.takt', 'failed', '2025-01-15T12-34-56_failed-task');
+    fs.mkdirSync(failedDir, { recursive: true });
+    fs.writeFileSync(path.join(failedDir, 'failed-task.md'), 'This failed');
+
+    const logSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+
+    // When
+    await listTasks(tmpDir, undefined, { enabled: true });
+
+    // Then
+    const calls = logSpy.mock.calls.map((c) => c[0] as string);
+    expect(calls).toContainEqual(expect.stringContaining('[failed] failed-task'));
+    expect(calls).toContainEqual(expect.stringContaining('This failed'));
+    logSpy.mockRestore();
+  });
+
+  it('should output both pending and failed tasks in text format', async () => {
+    // Given
+    const tasksDir = path.join(tmpDir, '.takt', 'tasks');
+    fs.mkdirSync(tasksDir, { recursive: true });
+    fs.writeFileSync(path.join(tasksDir, 'pending-one.md'), 'Pending task');
+
+    const failedDir = path.join(tmpDir, '.takt', 'failed', '2025-01-15T12-34-56_failed-one');
+    fs.mkdirSync(failedDir, { recursive: true });
+    fs.writeFileSync(path.join(failedDir, 'failed-one.md'), 'Failed task');
+
+    const logSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+
+    // When
+    await listTasks(tmpDir, undefined, { enabled: true });
+
+    // Then
+    const calls = logSpy.mock.calls.map((c) => c[0] as string);
+    expect(calls).toContainEqual(expect.stringContaining('[pending] pending-one'));
+    expect(calls).toContainEqual(expect.stringContaining('[failed] failed-one'));
+    logSpy.mockRestore();
+  });
+
+  it('should show info message when no tasks exist', async () => {
+    // Given: no tasks, no branches
+
+    const logSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+
+    // When
+    await listTasks(tmpDir, undefined, { enabled: true });
+
+    // Then
+    const calls = logSpy.mock.calls.map((c) => c[0] as string);
+    expect(calls.some((c) => c.includes('No tasks to list'))).toBe(true);
+    logSpy.mockRestore();
+  });
+});
+
+describe('listTasks non-interactive action errors', () => {
+  let tmpDir: string;
+
+  beforeEach(() => {
+    tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'takt-test-ni-err-'));
+    execFileSync('git', ['init', '--initial-branch', 'main'], { cwd: tmpDir, stdio: 'pipe' });
+    execFileSync('git', ['commit', '--allow-empty', '-m', 'init'], { cwd: tmpDir, stdio: 'pipe' });
+    // Create a pending task so the "no tasks" early return is not triggered
+    const tasksDir = path.join(tmpDir, '.takt', 'tasks');
+    fs.mkdirSync(tasksDir, { recursive: true });
+    fs.writeFileSync(path.join(tasksDir, 'dummy.md'), 'dummy');
+  });
+
+  afterEach(() => {
+    fs.rmSync(tmpDir, { recursive: true, force: true });
+  });
+
+  it('should exit with code 1 when --action specified without --branch', async () => {
+    // Given
+    const exitSpy = vi.spyOn(process, 'exit').mockImplementation(() => { throw new Error('process.exit'); });
+    const logSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+
+    // When / Then
+    await expect(
+      listTasks(tmpDir, undefined, { enabled: true, action: 'diff' }),
+    ).rejects.toThrow('process.exit');
+
+    expect(exitSpy).toHaveBeenCalledWith(1);
+    exitSpy.mockRestore();
+    logSpy.mockRestore();
+  });
+
+  it('should exit with code 1 for invalid action', async () => {
+    // Given
+    const exitSpy = vi.spyOn(process, 'exit').mockImplementation(() => { throw new Error('process.exit'); });
+    const logSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+
+    // When / Then
+    await expect(
+      listTasks(tmpDir, undefined, { enabled: true, action: 'invalid', branch: 'some-branch' }),
+    ).rejects.toThrow('process.exit');
+
+    expect(exitSpy).toHaveBeenCalledWith(1);
+    exitSpy.mockRestore();
+    logSpy.mockRestore();
+  });
+
+  it('should exit with code 1 when branch not found', async () => {
+    // Given
+    const exitSpy = vi.spyOn(process, 'exit').mockImplementation(() => { throw new Error('process.exit'); });
+    const logSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+
+    // When / Then
+    await expect(
+      listTasks(tmpDir, undefined, { enabled: true, action: 'diff', branch: 'takt/nonexistent' }),
+    ).rejects.toThrow('process.exit');
+
+    expect(exitSpy).toHaveBeenCalledWith(1);
+    exitSpy.mockRestore();
+    logSpy.mockRestore();
+  });
+
+  it('should exit with code 1 for delete without --yes', async () => {
+    // Given: create a branch so it's found
+    execFileSync('git', ['checkout', '-b', 'takt/20250115-test-branch'], { cwd: tmpDir, stdio: 'pipe' });
+    execFileSync('git', ['checkout', 'main'], { cwd: tmpDir, stdio: 'pipe' });
+
+    const exitSpy = vi.spyOn(process, 'exit').mockImplementation(() => { throw new Error('process.exit'); });
+    const logSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+
+    // When / Then
+    await expect(
+      listTasks(tmpDir, undefined, {
+        enabled: true,
+        action: 'delete',
+        branch: 'takt/20250115-test-branch',
+      }),
+    ).rejects.toThrow('process.exit');
+
+    expect(exitSpy).toHaveBeenCalledWith(1);
+    exitSpy.mockRestore();
+    logSpy.mockRestore();
+  });
+});

src/__tests__/listTasks.test.ts

@@ -2,14 +2,21 @@
  * Tests for list-tasks command
  */
 
-import { describe, it, expect, vi } from 'vitest';
+import { execFileSync } from 'node:child_process';
+import * as fs from 'node:fs';
+import * as path from 'node:path';
+import * as os from 'node:os';
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
 import {
   parseTaktBranches,
   extractTaskSlug,
   buildListItems,
   type BranchInfo,
 } from '../infra/task/branchList.js';
+import { TaskRunner } from '../infra/task/runner.js';
+import type { TaskListItem } from '../infra/task/types.js';
 import { isBranchMerged, showFullDiff, type ListAction } from '../features/tasks/index.js';
+import { listTasks } from '../features/tasks/list/index.js';
 
 describe('parseTaktBranches', () => {
   it('should parse takt/ branches from git branch output', () => {
@@ -178,3 +185,206 @@ describe('isBranchMerged', () => {
     expect(result).toBe(false);
   });
 });
+
+describe('TaskRunner.listFailedTasks', () => {
+  let tmpDir: string;
+
+  beforeEach(() => {
+    tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'takt-test-'));
+  });
+
+  afterEach(() => {
+    fs.rmSync(tmpDir, { recursive: true, force: true });
+  });
+
+  it('should return empty array for empty failed directory', () => {
+    const runner = new TaskRunner(tmpDir);
+    const result = runner.listFailedTasks();
+    expect(result).toEqual([]);
+  });
+
+  it('should parse failed task directories correctly', () => {
+    const failedDir = path.join(tmpDir, '.takt', 'failed');
+    const taskDir = path.join(failedDir, '2025-01-15T12-34-56_my-task');
+    fs.mkdirSync(taskDir, { recursive: true });
+    fs.writeFileSync(path.join(taskDir, 'my-task.md'), 'Fix the login bug\nMore details here');
+
+    const runner = new TaskRunner(tmpDir);
+    const result = runner.listFailedTasks();
+
+    expect(result).toHaveLength(1);
+    expect(result[0]).toEqual({
+      kind: 'failed',
+      name: 'my-task',
+      createdAt: '2025-01-15T12:34:56',
+      filePath: taskDir,
+      content: 'Fix the login bug',
+    });
+  });
+
+  it('should skip malformed directory names', () => {
+    const failedDir = path.join(tmpDir, '.takt', 'failed');
+    // No underscore → malformed, should be skipped
+    fs.mkdirSync(path.join(failedDir, 'malformed-name'), { recursive: true });
+    // Valid one
+    const validDir = path.join(failedDir, '2025-01-15T12-34-56_valid-task');
+    fs.mkdirSync(validDir, { recursive: true });
+    fs.writeFileSync(path.join(validDir, 'valid-task.md'), 'Content');
+
+    const runner = new TaskRunner(tmpDir);
+    const result = runner.listFailedTasks();
+
+    expect(result).toHaveLength(1);
+    expect(result[0]!.name).toBe('valid-task');
+  });
+
+  it('should extract task content from task file in directory', () => {
+    const failedDir = path.join(tmpDir, '.takt', 'failed');
+    const taskDir = path.join(failedDir, '2025-02-01T00-00-00_content-test');
+    fs.mkdirSync(taskDir, { recursive: true });
+    // report.md and log.json should be skipped; the actual task file should be read
+    fs.writeFileSync(path.join(taskDir, 'report.md'), 'Report content');
+    fs.writeFileSync(path.join(taskDir, 'log.json'), '{}');
+    fs.writeFileSync(path.join(taskDir, 'content-test.yaml'), 'task: Do something important');
+
+    const runner = new TaskRunner(tmpDir);
+    const result = runner.listFailedTasks();
+
+    expect(result).toHaveLength(1);
+    expect(result[0]!.content).toBe('task: Do something important');
+  });
+
+  it('should return empty content when no task file exists', () => {
+    const failedDir = path.join(tmpDir, '.takt', 'failed');
+    const taskDir = path.join(failedDir, '2025-02-01T00-00-00_no-task-file');
+    fs.mkdirSync(taskDir, { recursive: true });
+    // Only report.md and log.json, no actual task file
+    fs.writeFileSync(path.join(taskDir, 'report.md'), 'Report content');
+    fs.writeFileSync(path.join(taskDir, 'log.json'), '{}');
+
+    const runner = new TaskRunner(tmpDir);
+    const result = runner.listFailedTasks();
+
+    expect(result).toHaveLength(1);
+    expect(result[0]!.content).toBe('');
+  });
+
+  it('should handle task name with underscores', () => {
+    const failedDir = path.join(tmpDir, '.takt', 'failed');
+    const taskDir = path.join(failedDir, '2025-01-15T12-34-56_my_task_name');
+    fs.mkdirSync(taskDir, { recursive: true });
+
+    const runner = new TaskRunner(tmpDir);
+    const result = runner.listFailedTasks();
+
+    expect(result).toHaveLength(1);
+    expect(result[0]!.name).toBe('my_task_name');
+  });
+
+  it('should skip non-directory entries', () => {
+    const failedDir = path.join(tmpDir, '.takt', 'failed');
+    fs.mkdirSync(failedDir, { recursive: true });
+    // Create a file (not a directory) in the failed dir
+    fs.writeFileSync(path.join(failedDir, '2025-01-15T12-34-56_file-task'), 'content');
+
+    const runner = new TaskRunner(tmpDir);
+    const result = runner.listFailedTasks();
+
+    expect(result).toHaveLength(0);
+  });
+});
+
+describe('TaskRunner.listPendingTaskItems', () => {
+  let tmpDir: string;
+
+  beforeEach(() => {
+    tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'takt-test-'));
+  });
+
+  afterEach(() => {
+    fs.rmSync(tmpDir, { recursive: true, force: true });
+  });
+
+  it('should return empty array when no pending tasks', () => {
+    const runner = new TaskRunner(tmpDir);
+    const result = runner.listPendingTaskItems();
+    expect(result).toEqual([]);
+  });
+
+  it('should convert TaskInfo to TaskListItem with kind=pending', () => {
+    const tasksDir = path.join(tmpDir, '.takt', 'tasks');
+    fs.mkdirSync(tasksDir, { recursive: true });
+    fs.writeFileSync(path.join(tasksDir, 'my-task.md'), 'Fix the login bug\nMore details here');
+
+    const runner = new TaskRunner(tmpDir);
+    const result = runner.listPendingTaskItems();
+
+    expect(result).toHaveLength(1);
+    expect(result[0]!.kind).toBe('pending');
+    expect(result[0]!.name).toBe('my-task');
+    expect(result[0]!.content).toBe('Fix the login bug');
+  });
+
+  it('should truncate content to first line (max 80 chars)', () => {
+    const tasksDir = path.join(tmpDir, '.takt', 'tasks');
+    fs.mkdirSync(tasksDir, { recursive: true });
+    const longLine = 'A'.repeat(120) + '\nSecond line';
+    fs.writeFileSync(path.join(tasksDir, 'long-task.md'), longLine);
+
+    const runner = new TaskRunner(tmpDir);
+    const result = runner.listPendingTaskItems();
+
+    expect(result).toHaveLength(1);
+    expect(result[0]!.content).toBe('A'.repeat(80));
+  });
+});
+
+describe('listTasks non-interactive JSON output', () => {
+  let tmpDir: string;
+
+  beforeEach(() => {
+    tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'takt-test-json-'));
+    // Initialize as a git repo so detectDefaultBranch works
+    execFileSync('git', ['init', '--initial-branch', 'main'], { cwd: tmpDir, stdio: 'pipe' });
+    execFileSync('git', ['commit', '--allow-empty', '-m', 'init'], { cwd: tmpDir, stdio: 'pipe' });
+  });
+
+  afterEach(() => {
+    fs.rmSync(tmpDir, { recursive: true, force: true });
+  });
+
+  it('should output JSON as object with branches, pendingTasks, and failedTasks keys', async () => {
+    // Given: a pending task and a failed task
+    const tasksDir = path.join(tmpDir, '.takt', 'tasks');
+    fs.mkdirSync(tasksDir, { recursive: true });
+    fs.writeFileSync(path.join(tasksDir, 'my-task.md'), 'Do something');
+
+    const failedDir = path.join(tmpDir, '.takt', 'failed', '2025-01-15T12-34-56_failed-task');
+    fs.mkdirSync(failedDir, { recursive: true });
+    fs.writeFileSync(path.join(failedDir, 'failed-task.md'), 'This failed');
+
+    const logSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+
+    // When: listTasks is called in non-interactive JSON mode
+    await listTasks(tmpDir, undefined, {
+      enabled: true,
+      format: 'json',
+    });
+
+    // Then: output is an object with branches, pendingTasks, failedTasks
+    expect(logSpy).toHaveBeenCalledTimes(1);
+    const output = JSON.parse(logSpy.mock.calls[0]![0] as string);
+    expect(output).toHaveProperty('branches');
+    expect(output).toHaveProperty('pendingTasks');
+    expect(output).toHaveProperty('failedTasks');
+    expect(Array.isArray(output.branches)).toBe(true);
+    expect(Array.isArray(output.pendingTasks)).toBe(true);
+    expect(Array.isArray(output.failedTasks)).toBe(true);
+    expect(output.pendingTasks).toHaveLength(1);
+    expect(output.pendingTasks[0].name).toBe('my-task');
+    expect(output.failedTasks).toHaveLength(1);
+    expect(output.failedTasks[0].name).toBe('failed-task');
+
+    logSpy.mockRestore();
+  });
+});

src/__tests__/taskDeleteActions.test.ts

@@ -0,0 +1,180 @@
+/**
+ * Tests for taskDeleteActions — pending/failed task deletion
+ */
+
+import * as fs from 'node:fs';
+import * as path from 'node:path';
+import * as os from 'node:os';
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+
+vi.mock('../shared/prompt/index.js', () => ({
+  confirm: vi.fn(),
+}));
+
+vi.mock('../shared/ui/index.js', () => ({
+  success: vi.fn(),
+  error: vi.fn(),
+}));
+
+vi.mock('../shared/utils/index.js', async (importOriginal) => ({
+  ...(await importOriginal<Record<string, unknown>>()),
+  createLogger: () => ({
+    info: vi.fn(),
+    error: vi.fn(),
+  }),
+}));
+
+import { confirm } from '../shared/prompt/index.js';
+import { success, error as logError } from '../shared/ui/index.js';
+import { deletePendingTask, deleteFailedTask } from '../features/tasks/list/taskDeleteActions.js';
+import type { TaskListItem } from '../infra/task/types.js';
+
+const mockConfirm = vi.mocked(confirm);
+const mockSuccess = vi.mocked(success);
+const mockLogError = vi.mocked(logError);
+
+let tmpDir: string;
+
+beforeEach(() => {
+  vi.clearAllMocks();
+  tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'takt-test-delete-'));
+});
+
+afterEach(() => {
+  fs.rmSync(tmpDir, { recursive: true, force: true });
+});
+
+describe('deletePendingTask', () => {
+  it('should delete pending task file when confirmed', async () => {
+    // Given
+    const filePath = path.join(tmpDir, 'my-task.md');
+    fs.writeFileSync(filePath, 'task content');
+    const task: TaskListItem = {
+      kind: 'pending',
+      name: 'my-task',
+      createdAt: '2025-01-15',
+      filePath,
+      content: 'task content',
+    };
+    mockConfirm.mockResolvedValue(true);
+
+    // When
+    const result = await deletePendingTask(task);
+
+    // Then
+    expect(result).toBe(true);
+    expect(fs.existsSync(filePath)).toBe(false);
+    expect(mockSuccess).toHaveBeenCalledWith('Deleted pending task: my-task');
+  });
+
+  it('should not delete when user declines confirmation', async () => {
+    // Given
+    const filePath = path.join(tmpDir, 'my-task.md');
+    fs.writeFileSync(filePath, 'task content');
+    const task: TaskListItem = {
+      kind: 'pending',
+      name: 'my-task',
+      createdAt: '2025-01-15',
+      filePath,
+      content: 'task content',
+    };
+    mockConfirm.mockResolvedValue(false);
+
+    // When
+    const result = await deletePendingTask(task);
+
+    // Then
+    expect(result).toBe(false);
+    expect(fs.existsSync(filePath)).toBe(true);
+    expect(mockSuccess).not.toHaveBeenCalled();
+  });
+
+  it('should return false and show error when file does not exist', async () => {
+    // Given
+    const filePath = path.join(tmpDir, 'non-existent.md');
+    const task: TaskListItem = {
+      kind: 'pending',
+      name: 'non-existent',
+      createdAt: '2025-01-15',
+      filePath,
+      content: '',
+    };
+    mockConfirm.mockResolvedValue(true);
+
+    // When
+    const result = await deletePendingTask(task);
+
+    // Then
+    expect(result).toBe(false);
+    expect(mockLogError).toHaveBeenCalled();
+    expect(mockSuccess).not.toHaveBeenCalled();
+  });
+});
+
+describe('deleteFailedTask', () => {
+  it('should delete failed task directory when confirmed', async () => {
+    // Given
+    const dirPath = path.join(tmpDir, '2025-01-15T12-34-56_my-task');
+    fs.mkdirSync(dirPath, { recursive: true });
+    fs.writeFileSync(path.join(dirPath, 'my-task.md'), 'content');
+    const task: TaskListItem = {
+      kind: 'failed',
+      name: 'my-task',
+      createdAt: '2025-01-15T12:34:56',
+      filePath: dirPath,
+      content: 'content',
+    };
+    mockConfirm.mockResolvedValue(true);
+
+    // When
+    const result = await deleteFailedTask(task);
+
+    // Then
+    expect(result).toBe(true);
+    expect(fs.existsSync(dirPath)).toBe(false);
+    expect(mockSuccess).toHaveBeenCalledWith('Deleted failed task: my-task');
+  });
+
+  it('should not delete when user declines confirmation', async () => {
+    // Given
+    const dirPath = path.join(tmpDir, '2025-01-15T12-34-56_my-task');
+    fs.mkdirSync(dirPath, { recursive: true });
+    const task: TaskListItem = {
+      kind: 'failed',
+      name: 'my-task',
+      createdAt: '2025-01-15T12:34:56',
+      filePath: dirPath,
+      content: '',
+    };
+    mockConfirm.mockResolvedValue(false);
+
+    // When
+    const result = await deleteFailedTask(task);
+
+    // Then
+    expect(result).toBe(false);
+    expect(fs.existsSync(dirPath)).toBe(true);
+    expect(mockSuccess).not.toHaveBeenCalled();
+  });
+
+  it('should return false and show error when directory does not exist', async () => {
+    // Given
+    const dirPath = path.join(tmpDir, 'non-existent-dir');
+    const task: TaskListItem = {
+      kind: 'failed',
+      name: 'non-existent',
+      createdAt: '2025-01-15T12:34:56',
+      filePath: dirPath,
+      content: '',
+    };
+    mockConfirm.mockResolvedValue(true);
+
+    // When
+    const result = await deleteFailedTask(task);
+
+    // Then
+    expect(result).toBe(false);
+    expect(mockLogError).toHaveBeenCalled();
+    expect(mockSuccess).not.toHaveBeenCalled();
+  });
+});

src/features/tasks/list/index.ts

@@ -1,21 +1,23 @@
 /**
  * List tasks command — main entry point.
  *
- * Interactive UI for reviewing branch-based task results.
+ * Interactive UI for reviewing branch-based task results,
+ * pending tasks (.takt/tasks/), and failed tasks (.takt/failed/).
  * Individual actions (merge, delete, instruct, diff) are in taskActions.ts.
+ * Task delete actions are in taskDeleteActions.ts.
+ * Non-interactive mode is in listNonInteractive.ts.
  */
 
-import { execFileSync } from 'node:child_process';
 import {
-  detectDefaultBranch,
   listTaktBranches,
   buildListItems,
+  detectDefaultBranch,
+  TaskRunner,
 } from '../../../infra/task/index.js';
+import type { TaskListItem } from '../../../infra/task/index.js';
 import { selectOption, confirm } from '../../../shared/prompt/index.js';
-import { info } from '../../../shared/ui/index.js';
+import { info, header, blankLine } from '../../../shared/ui/index.js';
-import { createLogger } from '../../../shared/utils/index.js';
 import type { TaskExecutionOptions } from '../execute/types.js';
-import type { BranchListItem } from '../../../infra/task/index.js';
 import {
   type ListAction,
   showFullDiff,
@@ -25,6 +27,10 @@ import {
   deleteBranch,
   instructBranch,
 } from './taskActions.js';
+import { deletePendingTask, deleteFailedTask } from './taskDeleteActions.js';
+import { listTasksNonInteractive, type ListNonInteractiveOptions } from './listNonInteractive.js';
+
+export type { ListNonInteractiveOptions } from './listNonInteractive.js';
 
 export {
   type ListAction,
@@ -36,100 +42,25 @@ export {
   instructBranch,
 } from './taskActions.js';
 
-const log = createLogger('list-tasks');
+/** Task action type for the task action selection menu */
+type TaskAction = 'delete';
 
-export interface ListNonInteractiveOptions {
+/**
-  enabled: boolean;
+ * Show task details and prompt for an action.
-  action?: string;
+ * Returns the selected action, or null if cancelled.
-  branch?: string;
+ */
-  format?: string;
+async function showTaskAndPromptAction(task: TaskListItem): Promise<TaskAction | null> {
-  yes?: boolean;
+  header(`[${task.kind}] ${task.name}`);
-}
+  info(`  Created: ${task.createdAt}`);
-
+  if (task.content) {
-function isValidAction(action: string): action is ListAction {
+    info(`  ${task.content}`);
-  return action === 'diff' || action === 'try' || action === 'merge' || action === 'delete';
-}
-
-function printNonInteractiveList(items: BranchListItem[], format?: string): void {
-  const outputFormat = format ?? 'text';
-  if (outputFormat === 'json') {
-    console.log(JSON.stringify(items, null, 2));
-    return;
   }
+  blankLine();
 
-  for (const item of items) {
+  return await selectOption<TaskAction>(
-    const worktreeLabel = item.info.worktreePath ? ' (worktree)' : '';
+    `Action for ${task.name}:`,
-    const instruction = item.originalInstruction ? ` - ${item.originalInstruction}` : '';
+    [{ label: 'Delete', value: 'delete', description: 'Remove this task permanently' }],
-    console.log(`${item.info.branch}${worktreeLabel} (${item.filesChanged} files)${instruction}`);
+  );
-  }
-}
-
-function showDiffStat(projectDir: string, defaultBranch: string, branch: string): void {
-  try {
-    const stat = execFileSync(
-      'git', ['diff', '--stat', `${defaultBranch}...${branch}`],
-      { cwd: projectDir, encoding: 'utf-8', stdio: 'pipe' },
-    );
-    console.log(stat);
-  } catch {
-    info('Could not generate diff stat');
-  }
-}
-
-async function listTasksNonInteractive(
-  cwd: string,
-  _options: TaskExecutionOptions | undefined,
-  nonInteractive: ListNonInteractiveOptions,
-): Promise<void> {
-  const defaultBranch = detectDefaultBranch(cwd);
-  const branches = listTaktBranches(cwd);
-
-  if (branches.length === 0) {
-    info('No tasks to list.');
-    return;
-  }
-
-  const items = buildListItems(cwd, branches, defaultBranch);
-
-  if (!nonInteractive.action) {
-    printNonInteractiveList(items, nonInteractive.format);
-    return;
-  }
-
-  if (!nonInteractive.branch) {
-    info('Missing --branch for non-interactive action.');
-    process.exit(1);
-  }
-
-  if (!isValidAction(nonInteractive.action)) {
-    info('Invalid --action. Use one of: diff, try, merge, delete.');
-    process.exit(1);
-  }
-
-  const item = items.find((entry) => entry.info.branch === nonInteractive.branch);
-  if (!item) {
-    info(`Branch not found: ${nonInteractive.branch}`);
-    process.exit(1);
-  }
-
-  switch (nonInteractive.action) {
-    case 'diff':
-      showDiffStat(cwd, defaultBranch, item.info.branch);
-      return;
-    case 'try':
-      tryMergeBranch(cwd, item);
-      return;
-    case 'merge':
-      mergeBranch(cwd, item);
-      return;
-    case 'delete':
-      if (!nonInteractive.yes) {
-        info('Delete requires --yes in non-interactive mode.');
-        process.exit(1);
-      }
-      deleteBranch(cwd, item);
-      return;
-  }
 }
 
 /**
@@ -140,39 +71,52 @@ export async function listTasks(
   options?: TaskExecutionOptions,
   nonInteractive?: ListNonInteractiveOptions,
 ): Promise<void> {
-  log.info('Starting list-tasks');
-
   if (nonInteractive?.enabled) {
-    await listTasksNonInteractive(cwd, options, nonInteractive);
+    await listTasksNonInteractive(cwd, nonInteractive);
     return;
   }
 
   const defaultBranch = detectDefaultBranch(cwd);
-  let branches = listTaktBranches(cwd);
+  const runner = new TaskRunner(cwd);
-
-  if (branches.length === 0) {
-    info('No tasks to list.');
-    return;
-  }
 
   // Interactive loop
-  while (branches.length > 0) {
+  while (true) {
+    const branches = listTaktBranches(cwd);
     const items = buildListItems(cwd, branches, defaultBranch);
+    const pendingTasks = runner.listPendingTaskItems();
+    const failedTasks = runner.listFailedTasks();
 
-    const menuOptions = items.map((item, idx) => {
+    if (items.length === 0 && pendingTasks.length === 0 && failedTasks.length === 0) {
-      const filesSummary = `${item.filesChanged} file${item.filesChanged !== 1 ? 's' : ''} changed`;
+      info('No tasks to list.');
-      const description = item.originalInstruction
+      return;
-        ? `${filesSummary} | ${item.originalInstruction}`
+    }
-        : filesSummary;
+
-      return {
+    const menuOptions = [
-        label: item.info.branch,
+      ...items.map((item, idx) => {
-        value: String(idx),
+        const filesSummary = `${item.filesChanged} file${item.filesChanged !== 1 ? 's' : ''} changed`;
-        description,
+        const description = item.originalInstruction
-      };
+          ? `${filesSummary} | ${item.originalInstruction}`
-    });
+          : filesSummary;
+        return {
+          label: item.info.branch,
+          value: `branch:${idx}`,
+          description,
+        };
+      }),
+      ...pendingTasks.map((task, idx) => ({
+        label: `[pending] ${task.name}`,
+        value: `pending:${idx}`,
+        description: task.content,
+      })),
+      ...failedTasks.map((task, idx) => ({
+        label: `[failed] ${task.name}`,
+        value: `failed:${idx}`,
+        description: task.content,
+      })),
+    ];
 
     const selected = await selectOption<string>(
-      'List Tasks (Branches)',
+      'List Tasks',
       menuOptions,
     );
 
@@ -180,47 +124,63 @@ export async function listTasks(
       return;
     }
 
-    const selectedIdx = parseInt(selected, 10);
+    const colonIdx = selected.indexOf(':');
-    const item = items[selectedIdx];
+    if (colonIdx === -1) continue;
-    if (!item) continue;
+    const type = selected.slice(0, colonIdx);
+    const idx = parseInt(selected.slice(colonIdx + 1), 10);
+    if (Number.isNaN(idx)) continue;
 
-    // Action loop: re-show menu after viewing diff
+    if (type === 'branch') {
-    let action: ListAction | null;
+      const item = items[idx];
-    do {
+      if (!item) continue;
-      action = await showDiffAndPromptAction(cwd, defaultBranch, item);
 
-      if (action === 'diff') {
+      // Action loop: re-show menu after viewing diff
-        showFullDiff(cwd, defaultBranch, item.info.branch);
+      let action: ListAction | null;
-      }
+      do {
-    } while (action === 'diff');
+        action = await showDiffAndPromptAction(cwd, defaultBranch, item);
 
-    if (action === null) continue;
+        if (action === 'diff') {
-
+          showFullDiff(cwd, defaultBranch, item.info.branch);
-    switch (action) {
-      case 'instruct':
-        await instructBranch(cwd, item, options);
-        break;
-      case 'try':
-        tryMergeBranch(cwd, item);
-        break;
-      case 'merge':
-        mergeBranch(cwd, item);
-        break;
-      case 'delete': {
-        const confirmed = await confirm(
-          `Delete ${item.info.branch}? This will discard all changes.`,
-          false,
-        );
-        if (confirmed) {
-          deleteBranch(cwd, item);
         }
-        break;
+      } while (action === 'diff');
+
+      if (action === null) continue;
+
+      switch (action) {
+        case 'instruct':
+          await instructBranch(cwd, item, options);
+          break;
+        case 'try':
+          tryMergeBranch(cwd, item);
+          break;
+        case 'merge':
+          mergeBranch(cwd, item);
+          break;
+        case 'delete': {
+          const confirmed = await confirm(
+            `Delete ${item.info.branch}? This will discard all changes.`,
+            false,
+          );
+          if (confirmed) {
+            deleteBranch(cwd, item);
+          }
+          break;
+        }
+      }
+    } else if (type === 'pending') {
+      const task = pendingTasks[idx];
+      if (!task) continue;
+      const taskAction = await showTaskAndPromptAction(task);
+      if (taskAction === 'delete') {
+        await deletePendingTask(task);
+      }
+    } else if (type === 'failed') {
+      const task = failedTasks[idx];
+      if (!task) continue;
+      const taskAction = await showTaskAndPromptAction(task);
+      if (taskAction === 'delete') {
+        await deleteFailedTask(task);
       }
     }
-
-    // Refresh branch list after action
-    branches = listTaktBranches(cwd);
   }
-
-  info('All tasks listed.');
 }

src/features/tasks/list/listNonInteractive.ts

@@ -0,0 +1,140 @@
+/**
+ * Non-interactive list mode.
+ *
+ * Handles --non-interactive output (text/JSON) and
+ * non-interactive branch actions (--action, --branch).
+ */
+
+import { execFileSync } from 'node:child_process';
+import type { TaskListItem, BranchListItem } from '../../../infra/task/index.js';
+import {
+  detectDefaultBranch,
+  listTaktBranches,
+  buildListItems,
+  TaskRunner,
+} from '../../../infra/task/index.js';
+import { info } from '../../../shared/ui/index.js';
+import {
+  type ListAction,
+  tryMergeBranch,
+  mergeBranch,
+  deleteBranch,
+} from './taskActions.js';
+
+export interface ListNonInteractiveOptions {
+  enabled: boolean;
+  action?: string;
+  branch?: string;
+  format?: string;
+  yes?: boolean;
+}
+
+function isValidAction(action: string): action is ListAction {
+  return action === 'diff' || action === 'try' || action === 'merge' || action === 'delete';
+}
+
+function printNonInteractiveList(
+  items: BranchListItem[],
+  pendingTasks: TaskListItem[],
+  failedTasks: TaskListItem[],
+  format?: string,
+): void {
+  const outputFormat = format ?? 'text';
+  if (outputFormat === 'json') {
+    // stdout に直接出力（JSON パース用途のため UI ヘルパーを経由しない）
+    console.log(JSON.stringify({
+      branches: items,
+      pendingTasks,
+      failedTasks,
+    }, null, 2));
+    return;
+  }
+
+  for (const item of items) {
+    const worktreeLabel = item.info.worktreePath ? ' (worktree)' : '';
+    const instruction = item.originalInstruction ? ` - ${item.originalInstruction}` : '';
+    info(`${item.info.branch}${worktreeLabel} (${item.filesChanged} files)${instruction}`);
+  }
+
+  for (const task of pendingTasks) {
+    info(`[pending] ${task.name} - ${task.content}`);
+  }
+
+  for (const task of failedTasks) {
+    info(`[failed] ${task.name} - ${task.content}`);
+  }
+}
+
+function showDiffStat(projectDir: string, defaultBranch: string, branch: string): void {
+  try {
+    const stat = execFileSync(
+      'git', ['diff', '--stat', `${defaultBranch}...${branch}`],
+      { cwd: projectDir, encoding: 'utf-8', stdio: 'pipe' },
+    );
+    info(stat);
+  } catch {
+    info('Could not generate diff stat');
+  }
+}
+
+/**
+ * Run list-tasks in non-interactive mode.
+ */
+export async function listTasksNonInteractive(
+  cwd: string,
+  nonInteractive: ListNonInteractiveOptions,
+): Promise<void> {
+  const defaultBranch = detectDefaultBranch(cwd);
+  const branches = listTaktBranches(cwd);
+  const runner = new TaskRunner(cwd);
+  const pendingTasks = runner.listPendingTaskItems();
+  const failedTasks = runner.listFailedTasks();
+
+  const items = buildListItems(cwd, branches, defaultBranch);
+
+  if (items.length === 0 && pendingTasks.length === 0 && failedTasks.length === 0) {
+    info('No tasks to list.');
+    return;
+  }
+
+  if (!nonInteractive.action) {
+    printNonInteractiveList(items, pendingTasks, failedTasks, nonInteractive.format);
+    return;
+  }
+
+  // Branch-targeted action (--branch)
+  if (!nonInteractive.branch) {
+    info('Missing --branch for non-interactive action.');
+    process.exit(1);
+  }
+
+  if (!isValidAction(nonInteractive.action)) {
+    info('Invalid --action. Use one of: diff, try, merge, delete.');
+    process.exit(1);
+  }
+
+  const item = items.find((entry) => entry.info.branch === nonInteractive.branch);
+  if (!item) {
+    info(`Branch not found: ${nonInteractive.branch}`);
+    process.exit(1);
+  }
+
+  switch (nonInteractive.action) {
+    case 'diff':
+      showDiffStat(cwd, defaultBranch, item.info.branch);
+      return;
+    case 'try':
+      tryMergeBranch(cwd, item);
+      return;
+    case 'merge':
+      mergeBranch(cwd, item);
+      return;
+    case 'delete':
+      if (!nonInteractive.yes) {
+        info('Delete requires --yes in non-interactive mode.');
+        process.exit(1);
+      }
+      deleteBranch(cwd, item);
+      return;
+  }
+}

src/features/tasks/list/taskActions.ts

@@ -8,17 +8,16 @@
 import { execFileSync, spawnSync } from 'node:child_process';
 import { rmSync, existsSync, unlinkSync } from 'node:fs';
 import { join } from 'node:path';
+
 import chalk from 'chalk';
 import {
   createTempCloneForBranch,
   removeClone,
   removeCloneMeta,
   cleanupOrphanedClone,
-} from '../../../infra/task/index.js';
-import {
   detectDefaultBranch,
-  type BranchListItem,
   autoCommitAndPush,
+  type BranchListItem,
 } from '../../../infra/task/index.js';
 import { selectOption, promptInput } from '../../../shared/prompt/index.js';
 import { info, success, error as logError, warn, header, blankLine } from '../../../shared/ui/index.js';
@@ -86,7 +85,7 @@ export async function showDiffAndPromptAction(
 ): Promise<ListAction | null> {
   header(item.info.branch);
   if (item.originalInstruction) {
-    console.log(chalk.dim(`  ${item.originalInstruction}`));
+    info(chalk.dim(`  ${item.originalInstruction}`));
   }
   blankLine();
 
@@ -95,7 +94,7 @@ export async function showDiffAndPromptAction(
       'git', ['diff', '--stat', `${defaultBranch}...${item.info.branch}`],
       { cwd, encoding: 'utf-8', stdio: 'pipe' },
     );
-    console.log(stat);
+    info(stat);
   } catch {
     warn('Could not generate diff stat');
   }
@@ -362,3 +361,4 @@ export async function instructBranch(
     removeCloneMeta(projectDir, branch);
   }
 }
+

src/features/tasks/list/taskDeleteActions.ts

@@ -0,0 +1,54 @@
+/**
+ * Delete actions for pending and failed tasks.
+ *
+ * Provides interactive deletion (with confirm prompt)
+ * for pending task files and failed task directories.
+ */
+
+import { rmSync, unlinkSync } from 'node:fs';
+import type { TaskListItem } from '../../../infra/task/index.js';
+import { confirm } from '../../../shared/prompt/index.js';
+import { success, error as logError } from '../../../shared/ui/index.js';
+import { createLogger, getErrorMessage } from '../../../shared/utils/index.js';
+
+const log = createLogger('list-tasks');
+
+/**
+ * Delete a pending task file.
+ * Prompts user for confirmation first.
+ */
+export async function deletePendingTask(task: TaskListItem): Promise<boolean> {
+  const confirmed = await confirm(`Delete pending task "${task.name}"?`, false);
+  if (!confirmed) return false;
+  try {
+    unlinkSync(task.filePath);
+  } catch (err) {
+    const msg = getErrorMessage(err);
+    logError(`Failed to delete pending task "${task.name}": ${msg}`);
+    log.error('Failed to delete pending task', { name: task.name, filePath: task.filePath, error: msg });
+    return false;
+  }
+  success(`Deleted pending task: ${task.name}`);
+  log.info('Deleted pending task', { name: task.name, filePath: task.filePath });
+  return true;
+}
+
+/**
+ * Delete a failed task directory.
+ * Prompts user for confirmation first.
+ */
+export async function deleteFailedTask(task: TaskListItem): Promise<boolean> {
+  const confirmed = await confirm(`Delete failed task "${task.name}" and its logs?`, false);
+  if (!confirmed) return false;
+  try {
+    rmSync(task.filePath, { recursive: true });
+  } catch (err) {
+    const msg = getErrorMessage(err);
+    logError(`Failed to delete failed task "${task.name}": ${msg}`);
+    log.error('Failed to delete failed task', { name: task.name, filePath: task.filePath, error: msg });
+    return false;
+  }
+  success(`Deleted failed task: ${task.name}`);
+  log.info('Deleted failed task', { name: task.name, filePath: task.filePath });
+  return true;
+}

src/infra/task/index.ts

@@ -11,6 +11,7 @@ export type {
   BranchInfo,
   BranchListItem,
   SummarizeOptions,
+  TaskListItem,
 } from './types.js';
 
 // Classes

src/infra/task/runner.ts

@@ -16,9 +16,12 @@
 import * as fs from 'node:fs';
 import * as path from 'node:path';
 import { parseTaskFiles, parseTaskFile, type ParsedTask } from './parser.js';
-import type { TaskInfo, TaskResult } from './types.js';
+import type { TaskInfo, TaskResult, TaskListItem } from './types.js';
+import { createLogger } from '../../shared/utils/index.js';
 
-export type { TaskInfo, TaskResult };
+export type { TaskInfo, TaskResult, TaskListItem };
+
+const log = createLogger('task-runner');
 
 /**
  * タスク実行管理クラス
@@ -129,6 +132,78 @@ export class TaskRunner {
     return this.moveTask(result, this.failedDir);
   }
 
+  /**
+   * pendingタスクを TaskListItem 形式で取得
+   */
+  listPendingTaskItems(): TaskListItem[] {
+    return this.listTasks().map((task) => ({
+      kind: 'pending' as const,
+      name: task.name,
+      createdAt: task.createdAt,
+      filePath: task.filePath,
+      content: task.content.trim().split('\n')[0]?.slice(0, 80) ?? '',
+    }));
+  }
+
+  /**
+   * failedタスクの一覧を取得
+   * .takt/failed/ 内のサブディレクトリを走査し、TaskListItem を返す
+   */
+  listFailedTasks(): TaskListItem[] {
+    this.ensureDirs();
+
+    const entries = fs.readdirSync(this.failedDir);
+
+    return entries
+      .filter((entry) => {
+        const entryPath = path.join(this.failedDir, entry);
+        return fs.statSync(entryPath).isDirectory() && entry.includes('_');
+      })
+      .map((entry) => {
+        const entryPath = path.join(this.failedDir, entry);
+        const underscoreIdx = entry.indexOf('_');
+        const timestampRaw = entry.slice(0, underscoreIdx);
+        const name = entry.slice(underscoreIdx + 1);
+        const createdAt = timestampRaw.replace(
+          /^(\d{4}-\d{2}-\d{2}T\d{2})-(\d{2})-(\d{2})$/,
+          '$1:$2:$3',
+        );
+        const content = this.readFailedTaskContent(entryPath);
+        return { kind: 'failed' as const, name, createdAt, filePath: entryPath, content };
+      })
+      .filter((item) => item.name !== '');
+  }
+
+  /**
+   * failedタスクディレクトリ内のタスクファイルから先頭1行を読み取る
+   */
+  private readFailedTaskContent(dirPath: string): string {
+    const taskExtensions = ['.md', '.yaml', '.yml'];
+    let files: string[];
+    try {
+      files = fs.readdirSync(dirPath);
+    } catch (err) {
+      log.error('Failed to read failed task directory', { dirPath, error: String(err) });
+      return '';
+    }
+
+    for (const file of files) {
+      const ext = path.extname(file);
+      if (file === 'report.md' || file === 'log.json') continue;
+      if (!taskExtensions.includes(ext)) continue;
+
+      try {
+        const raw = fs.readFileSync(path.join(dirPath, file), 'utf-8');
+        return raw.trim().split('\n')[0]?.slice(0, 80) ?? '';
+      } catch (err) {
+        log.error('Failed to read failed task file', { file, dirPath, error: String(err) });
+        continue;
+      }
+    }
+
+    return '';
+  }
+
   /**
    * タスクファイルを指定ディレクトリに移動し、レポート・ログを生成する
    */

src/infra/task/types.ts

@@ -66,3 +66,12 @@ export interface SummarizeOptions {
   /** Use LLM for summarization (default: true). If false, uses romanization. */
   useLLM?: boolean;
 }
+
+/** pending/failedタスクのリストアイテム */
+export interface TaskListItem {
+  kind: 'pending' | 'failed';
+  name: string;
+  createdAt: string;
+  filePath: string;
+  content: string;
+}