feat(research): Adds MCP tool for command

- New MCP Tool: research tool enables AI-powered research with project context
- Context Integration: Supports task IDs, file paths, custom context, and project tree
- Fuzzy Task Discovery: Automatically finds relevant tasks using semantic search
- Token Management: Detailed token counting and breakdown by context type
- Multiple Detail Levels: Support for low, medium, and high detail research responses
- Telemetry Integration: Full cost tracking and usage analytics
- Direct Function: researchDirect with comprehensive parameter validation
- Silent Mode: Prevents console output interference with MCP JSON responses
- Error Handling: Robust error handling with proper MCP response formatting

This completes subtasks 94.5 (Direct Function) and 94.6 (MCP Tool) for the research command implementation, providing a powerful research interface for integrated development environments like Cursor.

Updated documentation across taskmaster.mdc, README.md, command-reference.md, examples.md, tutorial.md, and docs/README.md to highlight research capabilities and usage patterns.

mcp-server/src/core/direct-functions/research.js

@@ -0,0 +1,159 @@
+/**
+ * research.js
+ * Direct function implementation for AI-powered research queries
+ */
+
+import { performResearch } from '../../../../scripts/modules/task-manager.js';
+import {
+	enableSilentMode,
+	disableSilentMode
+} from '../../../../scripts/modules/utils.js';
+import { createLogWrapper } from '../../tools/utils.js';
+
+/**
+ * Direct function wrapper for performing AI-powered research with project context.
+ *
+ * @param {Object} args - Command arguments
+ * @param {string} args.query - Research query/prompt (required)
+ * @param {string} [args.taskIds] - Comma-separated list of task/subtask IDs for context
+ * @param {string} [args.filePaths] - Comma-separated list of file paths for context
+ * @param {string} [args.customContext] - Additional custom context text
+ * @param {boolean} [args.includeProjectTree=false] - Include project file tree in context
+ * @param {string} [args.detailLevel='medium'] - Detail level: 'low', 'medium', 'high'
+ * @param {string} [args.projectRoot] - Project root path
+ * @param {Object} log - Logger object
+ * @param {Object} context - Additional context (session)
+ * @returns {Promise<Object>} - Result object { success: boolean, data?: any, error?: { code: string, message: string } }
+ */
+export async function researchDirect(args, log, context = {}) {
+	// Destructure expected args
+	const {
+		query,
+		taskIds,
+		filePaths,
+		customContext,
+		includeProjectTree = false,
+		detailLevel = 'medium',
+		projectRoot
+	} = args;
+	const { session } = context; // Destructure session from context
+
+	// Enable silent mode to prevent console logs from interfering with JSON response
+	enableSilentMode();
+
+	// Create logger wrapper using the utility
+	const mcpLog = createLogWrapper(log);
+
+	try {
+		// Check required parameters
+		if (!query || typeof query !== 'string' || query.trim().length === 0) {
+			log.error('Missing or invalid required parameter: query');
+			disableSilentMode();
+			return {
+				success: false,
+				error: {
+					code: 'MISSING_PARAMETER',
+					message:
+						'The query parameter is required and must be a non-empty string'
+				}
+			};
+		}
+
+		// Parse comma-separated task IDs if provided
+		const parsedTaskIds = taskIds
+			? taskIds
+					.split(',')
+					.map((id) => id.trim())
+					.filter((id) => id.length > 0)
+			: [];
+
+		// Parse comma-separated file paths if provided
+		const parsedFilePaths = filePaths
+			? filePaths
+					.split(',')
+					.map((path) => path.trim())
+					.filter((path) => path.length > 0)
+			: [];
+
+		// Validate detail level
+		const validDetailLevels = ['low', 'medium', 'high'];
+		if (!validDetailLevels.includes(detailLevel)) {
+			log.error(`Invalid detail level: ${detailLevel}`);
+			disableSilentMode();
+			return {
+				success: false,
+				error: {
+					code: 'INVALID_PARAMETER',
+					message: `Detail level must be one of: ${validDetailLevels.join(', ')}`
+				}
+			};
+		}
+
+		log.info(
+			`Performing research query: "${query.substring(0, 100)}${query.length > 100 ? '...' : ''}", ` +
+				`taskIds: [${parsedTaskIds.join(', ')}], ` +
+				`filePaths: [${parsedFilePaths.join(', ')}], ` +
+				`detailLevel: ${detailLevel}, ` +
+				`includeProjectTree: ${includeProjectTree}, ` +
+				`projectRoot: ${projectRoot}`
+		);
+
+		// Prepare options for the research function
+		const researchOptions = {
+			taskIds: parsedTaskIds,
+			filePaths: parsedFilePaths,
+			customContext: customContext || '',
+			includeProjectTree,
+			detailLevel,
+			projectRoot
+		};
+
+		// Prepare context for the research function
+		const researchContext = {
+			session,
+			mcpLog,
+			commandName: 'research',
+			outputType: 'mcp'
+		};
+
+		// Call the performResearch function
+		const result = await performResearch(
+			query.trim(),
+			researchOptions,
+			researchContext,
+			'json', // outputFormat - use 'json' to suppress CLI UI
+			false // allowFollowUp - disable for MCP calls
+		);
+
+		// Restore normal logging
+		disableSilentMode();
+
+		return {
+			success: true,
+			data: {
+				query: result.query,
+				result: result.result,
+				contextSize: result.contextSize,
+				contextTokens: result.contextTokens,
+				tokenBreakdown: result.tokenBreakdown,
+				systemPromptTokens: result.systemPromptTokens,
+				userPromptTokens: result.userPromptTokens,
+				totalInputTokens: result.totalInputTokens,
+				detailLevel: result.detailLevel,
+				telemetryData: result.telemetryData
+			}
+		};
+	} catch (error) {
+		// Make sure to restore normal logging even if there's an error
+		disableSilentMode();
+
+		log.error(`Error in researchDirect: ${error.message}`);
+		return {
+			success: false,
+			error: {
+				code: error.code || 'RESEARCH_ERROR',
+				message: error.message
+			}
+		};
+	}
+}

mcp-server/src/core/task-master-core.js

@@ -31,6 +31,7 @@ import { removeTaskDirect } from './direct-functions/remove-task.js';
 import { initializeProjectDirect } from './direct-functions/initialize-project.js';
 import { modelsDirect } from './direct-functions/models.js';
 import { moveTaskDirect } from './direct-functions/move-task.js';
+import { researchDirect } from './direct-functions/research.js';
 
 // Re-export utility functions
 export { findTasksJsonPath } from './utils/path-utils.js';
@@ -62,7 +63,8 @@ export const directFunctions = new Map([
 	['removeTaskDirect', removeTaskDirect],
 	['initializeProjectDirect', initializeProjectDirect],
 	['modelsDirect', modelsDirect],
-	['moveTaskDirect', moveTaskDirect]
+	['moveTaskDirect', moveTaskDirect],
+	['researchDirect', researchDirect]
 ]);
 
 // Re-export all direct function implementations
@@ -92,5 +94,6 @@ export {
 	removeTaskDirect,
 	initializeProjectDirect,
 	modelsDirect,
-	moveTaskDirect
+	moveTaskDirect,
+	researchDirect
 };

mcp-server/src/tools/index.js

@@ -29,6 +29,7 @@ import { registerRemoveTaskTool } from './remove-task.js';
 import { registerInitializeProjectTool } from './initialize-project.js';
 import { registerModelsTool } from './models.js';
 import { registerMoveTaskTool } from './move-task.js';
+import { registerResearchTool } from './research.js';
 
 /**
  * Register all Task Master tools with the MCP server
@@ -74,6 +75,9 @@ export function registerTaskMasterTools(server) {
 		registerRemoveDependencyTool(server);
 		registerValidateDependenciesTool(server);
 		registerFixDependenciesTool(server);
+
+		// Group 7: AI-Powered Features
+		registerResearchTool(server);
 	} catch (error) {
 		logger.error(`Error registering Task Master tools: ${error.message}`);
 		throw error;

mcp-server/src/tools/research.js

@@ -0,0 +1,82 @@
+/**
+ * tools/research.js
+ * Tool to perform AI-powered research queries with project context
+ */
+
+import { z } from 'zod';
+import {
+	createErrorResponse,
+	handleApiResult,
+	withNormalizedProjectRoot
+} from './utils.js';
+import { researchDirect } from '../core/task-master-core.js';
+
+/**
+ * Register the research tool with the MCP server
+ * @param {Object} server - FastMCP server instance
+ */
+export function registerResearchTool(server) {
+	server.addTool({
+		name: 'research',
+		description: 'Perform AI-powered research queries with project context',
+		parameters: z.object({
+			query: z.string().describe('Research query/prompt (required)'),
+			taskIds: z
+				.string()
+				.optional()
+				.describe(
+					'Comma-separated list of task/subtask IDs for context (e.g., "15,16.2,17")'
+				),
+			filePaths: z
+				.string()
+				.optional()
+				.describe(
+					'Comma-separated list of file paths for context (e.g., "src/api.js,docs/readme.md")'
+				),
+			customContext: z
+				.string()
+				.optional()
+				.describe('Additional custom context text to include in the research'),
+			includeProjectTree: z
+				.boolean()
+				.optional()
+				.describe(
+					'Include project file tree structure in context (default: false)'
+				),
+			detailLevel: z
+				.enum(['low', 'medium', 'high'])
+				.optional()
+				.describe('Detail level for the research response (default: medium)'),
+			projectRoot: z
+				.string()
+				.describe('The directory of the project. Must be an absolute path.')
+		}),
+		execute: withNormalizedProjectRoot(async (args, { log, session }) => {
+			try {
+				log.info(
+					`Starting research with query: "${args.query.substring(0, 100)}${args.query.length > 100 ? '...' : ''}"`
+				);
+
+				// Call the direct function
+				const result = await researchDirect(
+					{
+						query: args.query,
+						taskIds: args.taskIds,
+						filePaths: args.filePaths,
+						customContext: args.customContext,
+						includeProjectTree: args.includeProjectTree || false,
+						detailLevel: args.detailLevel || 'medium',
+						projectRoot: args.projectRoot
+					},
+					log,
+					{ session }
+				);
+
+				return handleApiResult(result, log);
+			} catch (error) {
+				log.error(`Error in research tool: ${error.message}`);
+				return createErrorResponse(error.message);
+			}
+		})
+	});
+}