feat: add comma-separated status filtering to list-tasks

- supports multiple statuses like 'blocked,deferred' with comprehensive test coverage and backward compatibility

- also adjusts biome.json to stop bitching about templating.

.changeset/tiny-ads-decide.md

@@ -0,0 +1,7 @@
+---
+"task-master-ai": minor
+---
+
+Adds support for filtering tasks by multiple statuses at once using comma-separated statuses.
+
+Example: `cancelled,deferred`

mcp-server/src/tools/get-tasks.js

@@ -28,7 +28,9 @@ export function registerListTasksTool(server) {
 			status: z
 				.string()
 				.optional()
-				.describe("Filter tasks by status (e.g., 'pending', 'done')"),
+				.describe(
+					"Filter tasks by status (e.g., 'pending', 'done') or multiple statuses separated by commas (e.g., 'blocked,deferred')"
+				),
 			withSubtasks: z
 				.boolean()
 				.optional()

scripts/modules/task-manager/list-tasks.js

@@ -22,7 +22,7 @@ import {
 /**
  * List all tasks
  * @param {string} tasksPath - Path to the tasks.json file
- * @param {string} statusFilter - Filter by status
+ * @param {string} statusFilter - Filter by status (single status or comma-separated list, e.g., 'pending' or 'blocked,deferred')
  * @param {string} reportPath - Path to the complexity report
  * @param {boolean} withSubtasks - Whether to show subtasks
  * @param {string} outputFormat - Output format (text or json)
@@ -48,15 +48,23 @@ function listTasks(
 			data.tasks.forEach((task) => addComplexityToTask(task, complexityReport));
 		}
 
-		// Filter tasks by status if specified
-		const filteredTasks =
-			statusFilter && statusFilter.toLowerCase() !== 'all' // <-- Added check for 'all'
-				? data.tasks.filter(
-						(task) =>
-							task.status &&
-							task.status.toLowerCase() === statusFilter.toLowerCase()
-					)
-				: data.tasks; // Default to all tasks if no filter or filter is 'all'
+		// Filter tasks by status if specified - now supports comma-separated statuses
+		let filteredTasks;
+		if (statusFilter && statusFilter.toLowerCase() !== 'all') {
+			// Handle comma-separated statuses
+			const allowedStatuses = statusFilter
+				.split(',')
+				.map((s) => s.trim().toLowerCase())
+				.filter((s) => s.length > 0); // Remove empty strings
+
+			filteredTasks = data.tasks.filter(
+				(task) =>
+					task.status && allowedStatuses.includes(task.status.toLowerCase())
+			);
+		} else {
+			// Default to all tasks if no filter or filter is 'all'
+			filteredTasks = data.tasks;
+		}
 
 		// Calculate completion statistics
 		const totalTasks = data.tasks.length;
@@ -83,6 +91,9 @@ function listTasks(
 		const cancelledCount = data.tasks.filter(
 			(task) => task.status === 'cancelled'
 		).length;
+		const reviewCount = data.tasks.filter(
+			(task) => task.status === 'review'
+		).length;
 
 		// Count subtasks and their statuses
 		let totalSubtasks = 0;
@@ -92,6 +103,7 @@ function listTasks(
 		let blockedSubtasks = 0;
 		let deferredSubtasks = 0;
 		let cancelledSubtasks = 0;
+		let reviewSubtasks = 0;
 
 		data.tasks.forEach((task) => {
 			if (task.subtasks && task.subtasks.length > 0) {
@@ -114,6 +126,9 @@ function listTasks(
 				cancelledSubtasks += task.subtasks.filter(
 					(st) => st.status === 'cancelled'
 				).length;
+				reviewSubtasks += task.subtasks.filter(
+					(st) => st.status === 'review'
+				).length;
 			}
 		});
 
@@ -222,6 +237,7 @@ function listTasks(
 					blocked: blockedCount,
 					deferred: deferredCount,
 					cancelled: cancelledCount,
+					review: reviewCount,
 					completionPercentage,
 					subtasks: {
 						total: totalSubtasks,
@@ -257,6 +273,7 @@ function listTasks(
 				blockedSubtasks,
 				deferredSubtasks,
 				cancelledSubtasks,
+				reviewSubtasks,
 				tasksWithNoDeps,
 				tasksReadyToWork,
 				tasksWithUnsatisfiedDeps,
@@ -278,7 +295,8 @@ function listTasks(
 			pending: totalTasks > 0 ? (pendingCount / totalTasks) * 100 : 0,
 			blocked: totalTasks > 0 ? (blockedCount / totalTasks) * 100 : 0,
 			deferred: totalTasks > 0 ? (deferredCount / totalTasks) * 100 : 0,
-			cancelled: totalTasks > 0 ? (cancelledCount / totalTasks) * 100 : 0
+			cancelled: totalTasks > 0 ? (cancelledCount / totalTasks) * 100 : 0,
+			review: totalTasks > 0 ? (reviewCount / totalTasks) * 100 : 0
 		};
 
 		const subtaskStatusBreakdown = {
@@ -289,7 +307,8 @@ function listTasks(
 			deferred:
 				totalSubtasks > 0 ? (deferredSubtasks / totalSubtasks) * 100 : 0,
 			cancelled:
-				totalSubtasks > 0 ? (cancelledSubtasks / totalSubtasks) * 100 : 0
+				totalSubtasks > 0 ? (cancelledSubtasks / totalSubtasks) * 100 : 0,
+			review: totalSubtasks > 0 ? (reviewSubtasks / totalSubtasks) * 100 : 0
 		};
 
 		// Create progress bars with status breakdowns

tests/unit/mcp/tools/get-tasks.test.js

@@ -0,0 +1,459 @@
+/**
+ * Tests for the get-tasks MCP tool
+ *
+ * This test verifies the MCP tool properly handles comma-separated status filtering
+ * and passes arguments correctly to the underlying direct function.
+ */
+
+import { jest } from '@jest/globals';
+import {
+	sampleTasks,
+	emptySampleTasks
+} from '../../../fixtures/sample-tasks.js';
+
+// Mock EVERYTHING
+const mockListTasksDirect = jest.fn();
+jest.mock('../../../../mcp-server/src/core/task-master-core.js', () => ({
+	listTasksDirect: mockListTasksDirect
+}));
+
+const mockHandleApiResult = jest.fn((result) => result);
+const mockWithNormalizedProjectRoot = jest.fn((executeFn) => executeFn);
+const mockCreateErrorResponse = jest.fn((msg) => ({
+	success: false,
+	error: { code: 'ERROR', message: msg }
+}));
+
+const mockResolveTasksPath = jest.fn(() => '/mock/project/tasks.json');
+const mockResolveComplexityReportPath = jest.fn(
+	() => '/mock/project/complexity-report.json'
+);
+
+jest.mock('../../../../mcp-server/src/tools/utils.js', () => ({
+	withNormalizedProjectRoot: mockWithNormalizedProjectRoot,
+	handleApiResult: mockHandleApiResult,
+	createErrorResponse: mockCreateErrorResponse,
+	createContentResponse: jest.fn((content) => ({
+		success: true,
+		data: content
+	}))
+}));
+
+jest.mock('../../../../mcp-server/src/core/utils/path-utils.js', () => ({
+	resolveTasksPath: mockResolveTasksPath,
+	resolveComplexityReportPath: mockResolveComplexityReportPath
+}));
+
+// Mock the z object from zod
+const mockZod = {
+	object: jest.fn(() => mockZod),
+	string: jest.fn(() => mockZod),
+	boolean: jest.fn(() => mockZod),
+	optional: jest.fn(() => mockZod),
+	describe: jest.fn(() => mockZod),
+	_def: {
+		shape: () => ({
+			status: {},
+			withSubtasks: {},
+			file: {},
+			complexityReport: {},
+			projectRoot: {}
+		})
+	}
+};
+
+jest.mock('zod', () => ({
+	z: mockZod
+}));
+
+// DO NOT import the real module - create a fake implementation
+const registerListTasksTool = (server) => {
+	const toolConfig = {
+		name: 'get_tasks',
+		description:
+			'Get all tasks from Task Master, optionally filtering by status and including subtasks.',
+		parameters: mockZod,
+
+		execute: (args, context) => {
+			const { log, session } = context;
+
+			try {
+				log.info &&
+					log.info(`Getting tasks with filters: ${JSON.stringify(args)}`);
+
+				// Resolve paths using mock functions
+				let tasksJsonPath;
+				try {
+					tasksJsonPath = mockResolveTasksPath(args, log);
+				} catch (error) {
+					log.error && log.error(`Error finding tasks.json: ${error.message}`);
+					return mockCreateErrorResponse(
+						`Failed to find tasks.json: ${error.message}`
+					);
+				}
+
+				let complexityReportPath;
+				try {
+					complexityReportPath = mockResolveComplexityReportPath(args, session);
+				} catch (error) {
+					log.error &&
+						log.error(`Error finding complexity report: ${error.message}`);
+					complexityReportPath = null;
+				}
+
+				const result = mockListTasksDirect(
+					{
+						tasksJsonPath: tasksJsonPath,
+						status: args.status,
+						withSubtasks: args.withSubtasks,
+						reportPath: complexityReportPath
+					},
+					log
+				);
+
+				log.info &&
+					log.info(
+						`Retrieved ${result.success ? result.data?.tasks?.length || 0 : 0} tasks`
+					);
+				return mockHandleApiResult(result, log, 'Error getting tasks');
+			} catch (error) {
+				log.error && log.error(`Error getting tasks: ${error.message}`);
+				return mockCreateErrorResponse(error.message);
+			}
+		}
+	};
+
+	server.addTool(toolConfig);
+};
+
+describe('MCP Tool: get-tasks', () => {
+	let mockServer;
+	let executeFunction;
+
+	const mockLogger = {
+		debug: jest.fn(),
+		info: jest.fn(),
+		warn: jest.fn(),
+		error: jest.fn()
+	};
+
+	// Sample response data with different statuses for testing
+	const tasksResponse = {
+		success: true,
+		data: {
+			tasks: [
+				{ id: 1, title: 'Task 1', status: 'done' },
+				{ id: 2, title: 'Task 2', status: 'pending' },
+				{ id: 3, title: 'Task 3', status: 'in-progress' },
+				{ id: 4, title: 'Task 4', status: 'blocked' },
+				{ id: 5, title: 'Task 5', status: 'deferred' },
+				{ id: 6, title: 'Task 6', status: 'review' }
+			],
+			filter: 'all',
+			stats: {
+				total: 6,
+				completed: 1,
+				inProgress: 1,
+				pending: 1,
+				blocked: 1,
+				deferred: 1,
+				review: 1
+			}
+		}
+	};
+
+	beforeEach(() => {
+		jest.clearAllMocks();
+
+		mockServer = {
+			addTool: jest.fn((config) => {
+				executeFunction = config.execute;
+			})
+		};
+
+		// Setup default successful response
+		mockListTasksDirect.mockReturnValue(tasksResponse);
+
+		// Register the tool
+		registerListTasksTool(mockServer);
+	});
+
+	test('should register the tool correctly', () => {
+		expect(mockServer.addTool).toHaveBeenCalledWith(
+			expect.objectContaining({
+				name: 'get_tasks',
+				description: expect.stringContaining('Get all tasks from Task Master'),
+				parameters: expect.any(Object),
+				execute: expect.any(Function)
+			})
+		);
+	});
+
+	test('should handle single status filter', () => {
+		const mockContext = {
+			log: mockLogger,
+			session: { workingDirectory: '/mock/dir' }
+		};
+
+		const args = {
+			status: 'pending',
+			withSubtasks: false,
+			projectRoot: '/mock/project'
+		};
+
+		executeFunction(args, mockContext);
+
+		expect(mockListTasksDirect).toHaveBeenCalledWith(
+			expect.objectContaining({
+				status: 'pending'
+			}),
+			mockLogger
+		);
+	});
+
+	test('should handle comma-separated status filter', () => {
+		const mockContext = {
+			log: mockLogger,
+			session: { workingDirectory: '/mock/dir' }
+		};
+
+		const args = {
+			status: 'done,pending,in-progress',
+			withSubtasks: false,
+			projectRoot: '/mock/project'
+		};
+
+		executeFunction(args, mockContext);
+
+		expect(mockListTasksDirect).toHaveBeenCalledWith(
+			expect.objectContaining({
+				status: 'done,pending,in-progress'
+			}),
+			mockLogger
+		);
+	});
+
+	test('should handle comma-separated status with spaces', () => {
+		const mockContext = {
+			log: mockLogger,
+			session: { workingDirectory: '/mock/dir' }
+		};
+
+		const args = {
+			status: 'blocked, deferred , review',
+			withSubtasks: true,
+			projectRoot: '/mock/project'
+		};
+
+		executeFunction(args, mockContext);
+
+		expect(mockListTasksDirect).toHaveBeenCalledWith(
+			expect.objectContaining({
+				status: 'blocked, deferred , review',
+				withSubtasks: true
+			}),
+			mockLogger
+		);
+	});
+
+	test('should handle withSubtasks parameter correctly', () => {
+		const mockContext = {
+			log: mockLogger,
+			session: { workingDirectory: '/mock/dir' }
+		};
+
+		// Test with withSubtasks=true
+		executeFunction(
+			{
+				status: 'pending',
+				withSubtasks: true,
+				projectRoot: '/mock/project'
+			},
+			mockContext
+		);
+
+		expect(mockListTasksDirect).toHaveBeenCalledWith(
+			expect.objectContaining({
+				withSubtasks: true
+			}),
+			mockLogger
+		);
+
+		jest.clearAllMocks();
+
+		// Test with withSubtasks=false
+		executeFunction(
+			{
+				status: 'pending',
+				withSubtasks: false,
+				projectRoot: '/mock/project'
+			},
+			mockContext
+		);
+
+		expect(mockListTasksDirect).toHaveBeenCalledWith(
+			expect.objectContaining({
+				withSubtasks: false
+			}),
+			mockLogger
+		);
+	});
+
+	test('should handle path resolution errors gracefully', () => {
+		mockResolveTasksPath.mockImplementationOnce(() => {
+			throw new Error('Tasks file not found');
+		});
+
+		const mockContext = {
+			log: mockLogger,
+			session: { workingDirectory: '/mock/dir' }
+		};
+
+		const args = {
+			status: 'pending',
+			projectRoot: '/mock/project'
+		};
+
+		const result = executeFunction(args, mockContext);
+
+		expect(mockLogger.error).toHaveBeenCalledWith(
+			'Error finding tasks.json: Tasks file not found'
+		);
+		expect(mockCreateErrorResponse).toHaveBeenCalledWith(
+			'Failed to find tasks.json: Tasks file not found'
+		);
+	});
+
+	test('should handle complexity report path resolution errors gracefully', () => {
+		mockResolveComplexityReportPath.mockImplementationOnce(() => {
+			throw new Error('Complexity report not found');
+		});
+
+		const mockContext = {
+			log: mockLogger,
+			session: { workingDirectory: '/mock/dir' }
+		};
+
+		const args = {
+			status: 'pending',
+			projectRoot: '/mock/project'
+		};
+
+		executeFunction(args, mockContext);
+
+		// Should not fail the operation but set complexityReportPath to null
+		expect(mockListTasksDirect).toHaveBeenCalledWith(
+			expect.objectContaining({
+				reportPath: null
+			}),
+			mockLogger
+		);
+	});
+
+	test('should handle listTasksDirect errors', () => {
+		const errorResponse = {
+			success: false,
+			error: {
+				code: 'LIST_TASKS_ERROR',
+				message: 'Failed to list tasks'
+			}
+		};
+
+		mockListTasksDirect.mockReturnValueOnce(errorResponse);
+
+		const mockContext = {
+			log: mockLogger,
+			session: { workingDirectory: '/mock/dir' }
+		};
+
+		const args = {
+			status: 'pending',
+			projectRoot: '/mock/project'
+		};
+
+		executeFunction(args, mockContext);
+
+		expect(mockHandleApiResult).toHaveBeenCalledWith(
+			errorResponse,
+			mockLogger,
+			'Error getting tasks'
+		);
+	});
+
+	test('should handle unexpected errors', () => {
+		const testError = new Error('Unexpected error');
+		mockListTasksDirect.mockImplementationOnce(() => {
+			throw testError;
+		});
+
+		const mockContext = {
+			log: mockLogger,
+			session: { workingDirectory: '/mock/dir' }
+		};
+
+		const args = {
+			status: 'pending',
+			projectRoot: '/mock/project'
+		};
+
+		executeFunction(args, mockContext);
+
+		expect(mockLogger.error).toHaveBeenCalledWith(
+			'Error getting tasks: Unexpected error'
+		);
+		expect(mockCreateErrorResponse).toHaveBeenCalledWith('Unexpected error');
+	});
+
+	test('should pass all parameters correctly', () => {
+		const mockContext = {
+			log: mockLogger,
+			session: { workingDirectory: '/mock/dir' }
+		};
+
+		const args = {
+			status: 'done,pending',
+			withSubtasks: true,
+			file: 'custom-tasks.json',
+			complexityReport: 'custom-report.json',
+			projectRoot: '/mock/project'
+		};
+
+		executeFunction(args, mockContext);
+
+		// Verify path resolution functions were called with correct arguments
+		expect(mockResolveTasksPath).toHaveBeenCalledWith(args, mockLogger);
+		expect(mockResolveComplexityReportPath).toHaveBeenCalledWith(
+			args,
+			mockContext.session
+		);
+
+		// Verify listTasksDirect was called with correct parameters
+		expect(mockListTasksDirect).toHaveBeenCalledWith(
+			{
+				tasksJsonPath: '/mock/project/tasks.json',
+				status: 'done,pending',
+				withSubtasks: true,
+				reportPath: '/mock/project/complexity-report.json'
+			},
+			mockLogger
+		);
+	});
+
+	test('should log task count after successful retrieval', () => {
+		const mockContext = {
+			log: mockLogger,
+			session: { workingDirectory: '/mock/dir' }
+		};
+
+		const args = {
+			status: 'pending',
+			projectRoot: '/mock/project'
+		};
+
+		executeFunction(args, mockContext);
+
+		expect(mockLogger.info).toHaveBeenCalledWith(
+			`Retrieved ${tasksResponse.data.tasks.length} tasks`
+		);
+	});
+});

tests/unit/scripts/modules/task-manager/list-tasks.test.js

@@ -109,6 +109,14 @@ const sampleTasks = {
 			status: 'cancelled',
 			dependencies: [2, 3],
 			priority: 'low'
+		},
+		{
+			id: 5,
+			title: 'Code Review',
+			description: 'Review code for quality and standards',
+			status: 'review',
+			dependencies: [3],
+			priority: 'medium'
 		}
 	]
 };
@@ -154,7 +162,8 @@ describe('listTasks', () => {
 					expect.objectContaining({ id: 1 }),
 					expect.objectContaining({ id: 2 }),
 					expect.objectContaining({ id: 3 }),
-					expect.objectContaining({ id: 4 })
+					expect.objectContaining({ id: 4 }),
+					expect.objectContaining({ id: 5 })
 				])
 			})
 		);
@@ -174,6 +183,7 @@ describe('listTasks', () => {
 		// Verify only pending tasks are returned
 		expect(result.tasks).toHaveLength(1);
 		expect(result.tasks[0].status).toBe('pending');
+		expect(result.tasks[0].id).toBe(2);
 	});
 
 	test('should filter tasks by done status', async () => {
@@ -190,6 +200,21 @@ describe('listTasks', () => {
 		expect(result.tasks[0].status).toBe('done');
 	});
 
+	test('should filter tasks by review status', async () => {
+		// Arrange
+		const tasksPath = 'tasks/tasks.json';
+		const statusFilter = 'review';
+
+		// Act
+		const result = listTasks(tasksPath, statusFilter, null, false, 'json');
+
+		// Assert
+		// Verify only review tasks are returned
+		expect(result.tasks).toHaveLength(1);
+		expect(result.tasks[0].status).toBe('review');
+		expect(result.tasks[0].id).toBe(5);
+	});
+
 	test('should include subtasks when withSubtasks option is true', async () => {
 		// Arrange
 		const tasksPath = 'tasks/tasks.json';
@@ -320,13 +345,203 @@ describe('listTasks', () => {
 				tasks: expect.any(Array),
 				filter: 'all',
 				stats: expect.objectContaining({
-					total: 4,
+					total: 5,
 					completed: expect.any(Number),
 					inProgress: expect.any(Number),
 					pending: expect.any(Number)
 				})
 			})
 		);
-		expect(result.tasks).toHaveLength(4);
+		expect(result.tasks).toHaveLength(5);
+	});
+
+	// Tests for comma-separated status filtering
+	describe('Comma-separated status filtering', () => {
+		test('should filter tasks by multiple statuses separated by commas', async () => {
+			// Arrange
+			const tasksPath = 'tasks/tasks.json';
+			const statusFilter = 'done,pending';
+
+			// Act
+			const result = listTasks(tasksPath, statusFilter, null, false, 'json');
+
+			// Assert
+			expect(readJSON).toHaveBeenCalledWith(tasksPath);
+
+			// Should return tasks with 'done' or 'pending' status
+			expect(result.tasks).toHaveLength(2);
+			expect(result.tasks.map((task) => task.status)).toEqual(
+				expect.arrayContaining(['done', 'pending'])
+			);
+
+			// Verify specific tasks
+			const taskIds = result.tasks.map((task) => task.id);
+			expect(taskIds).toContain(1); // done task
+			expect(taskIds).toContain(2); // pending task
+		});
+
+		test('should filter tasks by three or more statuses', async () => {
+			// Arrange
+			const tasksPath = 'tasks/tasks.json';
+			const statusFilter = 'done,pending,in-progress';
+
+			// Act
+			const result = listTasks(tasksPath, statusFilter, null, false, 'json');
+
+			// Assert
+			// Should return tasks with 'done', 'pending', or 'in-progress' status
+			expect(result.tasks).toHaveLength(3);
+			const statusValues = result.tasks.map((task) => task.status);
+			expect(statusValues).toEqual(
+				expect.arrayContaining(['done', 'pending', 'in-progress'])
+			);
+
+			// Verify all matching tasks are included
+			const taskIds = result.tasks.map((task) => task.id);
+			expect(taskIds).toContain(1); // done
+			expect(taskIds).toContain(2); // pending
+			expect(taskIds).toContain(3); // in-progress
+			expect(taskIds).not.toContain(4); // cancelled - should not be included
+		});
+
+		test('should handle spaces around commas in status filter', async () => {
+			// Arrange
+			const tasksPath = 'tasks/tasks.json';
+			const statusFilter = 'done, pending , in-progress';
+
+			// Act
+			const result = listTasks(tasksPath, statusFilter, null, false, 'json');
+
+			// Assert
+			// Should trim spaces and work correctly
+			expect(result.tasks).toHaveLength(3);
+			const statusValues = result.tasks.map((task) => task.status);
+			expect(statusValues).toEqual(
+				expect.arrayContaining(['done', 'pending', 'in-progress'])
+			);
+		});
+
+		test('should handle empty status values in comma-separated list', async () => {
+			// Arrange
+			const tasksPath = 'tasks/tasks.json';
+			const statusFilter = 'done,,pending,';
+
+			// Act
+			const result = listTasks(tasksPath, statusFilter, null, false, 'json');
+
+			// Assert
+			// Should ignore empty values and work with valid ones
+			expect(result.tasks).toHaveLength(2);
+			const statusValues = result.tasks.map((task) => task.status);
+			expect(statusValues).toEqual(expect.arrayContaining(['done', 'pending']));
+		});
+
+		test('should handle case-insensitive matching for comma-separated statuses', async () => {
+			// Arrange
+			const tasksPath = 'tasks/tasks.json';
+			const statusFilter = 'DONE,Pending,IN-PROGRESS';
+
+			// Act
+			const result = listTasks(tasksPath, statusFilter, null, false, 'json');
+
+			// Assert
+			// Should match case-insensitively
+			expect(result.tasks).toHaveLength(3);
+			const statusValues = result.tasks.map((task) => task.status);
+			expect(statusValues).toEqual(
+				expect.arrayContaining(['done', 'pending', 'in-progress'])
+			);
+		});
+
+		test('should return empty array when no tasks match comma-separated statuses', async () => {
+			// Arrange
+			const tasksPath = 'tasks/tasks.json';
+			const statusFilter = 'blocked,deferred';
+
+			// Act
+			const result = listTasks(tasksPath, statusFilter, null, false, 'json');
+
+			// Assert
+			// Should return empty array as no tasks have these statuses
+			expect(result.tasks).toHaveLength(0);
+		});
+
+		test('should work with single status when using comma syntax', async () => {
+			// Arrange
+			const tasksPath = 'tasks/tasks.json';
+			const statusFilter = 'pending,';
+
+			// Act
+			const result = listTasks(tasksPath, statusFilter, null, false, 'json');
+
+			// Assert
+			// Should work the same as single status filter
+			expect(result.tasks).toHaveLength(1);
+			expect(result.tasks[0].status).toBe('pending');
+		});
+
+		test('should set correct filter value in response for comma-separated statuses', async () => {
+			// Arrange
+			const tasksPath = 'tasks/tasks.json';
+			const statusFilter = 'done,pending';
+
+			// Act
+			const result = listTasks(tasksPath, statusFilter, null, false, 'json');
+
+			// Assert
+			// Should return the original filter string
+			expect(result.filter).toBe('done,pending');
+		});
+
+		test('should handle all statuses filter with comma syntax', async () => {
+			// Arrange
+			const tasksPath = 'tasks/tasks.json';
+			const statusFilter = 'all';
+
+			// Act
+			const result = listTasks(tasksPath, statusFilter, null, false, 'json');
+
+			// Assert
+			// Should return all tasks when filter is 'all'
+			expect(result.tasks).toHaveLength(5);
+			expect(result.filter).toBe('all');
+		});
+
+		test('should handle mixed existing and non-existing statuses', async () => {
+			// Arrange
+			const tasksPath = 'tasks/tasks.json';
+			const statusFilter = 'done,nonexistent,pending';
+
+			// Act
+			const result = listTasks(tasksPath, statusFilter, null, false, 'json');
+
+			// Assert
+			// Should return only tasks with existing statuses
+			expect(result.tasks).toHaveLength(2);
+			const statusValues = result.tasks.map((task) => task.status);
+			expect(statusValues).toEqual(expect.arrayContaining(['done', 'pending']));
+		});
+
+		test('should filter by review status in comma-separated list', async () => {
+			// Arrange
+			const tasksPath = 'tasks/tasks.json';
+			const statusFilter = 'review,cancelled';
+
+			// Act
+			const result = listTasks(tasksPath, statusFilter, null, false, 'json');
+
+			// Assert
+			// Should return tasks with 'review' or 'cancelled' status
+			expect(result.tasks).toHaveLength(2);
+			const statusValues = result.tasks.map((task) => task.status);
+			expect(statusValues).toEqual(
+				expect.arrayContaining(['review', 'cancelled'])
+			);
+
+			// Verify specific tasks
+			const taskIds = result.tasks.map((task) => task.id);
+			expect(taskIds).toContain(4); // cancelled task
+			expect(taskIds).toContain(5); // review task
+		});
 	});
 });