feat(mcp): Implement update-task MCP command for updating single tasks by ID with proper direct function wrapper, MCP tool implementation, and registration

mcp-server/src/core/direct-functions/update-task-by-id.js

@@ -0,0 +1,105 @@
+/**
+ * update-task-by-id.js
+ * Direct function implementation for updating a single task by ID with new information
+ */
+
+import { updateTaskById } from '../../../../scripts/modules/task-manager.js';
+import { findTasksJsonPath } from '../utils/path-utils.js';
+
+/**
+ * Direct function wrapper for updateTaskById with error handling.
+ * 
+ * @param {Object} args - Command arguments containing id, prompt, useResearch and file path options.
+ * @param {Object} log - Logger object.
+ * @returns {Promise<Object>} - Result object with success status and data/error information.
+ */
+export async function updateTaskByIdDirect(args, log) {
+  try {
+    log.info(`Updating task with args: ${JSON.stringify(args)}`);
+    
+    // Check required parameters
+    if (!args.id) {
+      const errorMessage = 'No task ID specified. Please provide a task ID to update.';
+      log.error(errorMessage);
+      return { 
+        success: false, 
+        error: { code: 'MISSING_TASK_ID', message: errorMessage },
+        fromCache: false 
+      };
+    }
+    
+    if (!args.prompt) {
+      const errorMessage = 'No prompt specified. Please provide a prompt with new information for the task update.';
+      log.error(errorMessage);
+      return { 
+        success: false, 
+        error: { code: 'MISSING_PROMPT', message: errorMessage },
+        fromCache: false 
+      };
+    }
+    
+    // Parse taskId - handle both string and number values
+    let taskId;
+    if (typeof args.id === 'string') {
+      // Handle subtask IDs (e.g., "5.2")
+      if (args.id.includes('.')) {
+        taskId = args.id; // Keep as string for subtask IDs
+      } else {
+        // Parse as integer for main task IDs
+        taskId = parseInt(args.id, 10);
+        if (isNaN(taskId)) {
+          const errorMessage = `Invalid task ID: ${args.id}. Task ID must be a positive integer or subtask ID (e.g., "5.2").`;
+          log.error(errorMessage);
+          return { 
+            success: false, 
+            error: { code: 'INVALID_TASK_ID', message: errorMessage },
+            fromCache: false 
+          };
+        }
+      }
+    } else {
+      taskId = args.id;
+    }
+    
+    // Get tasks file path
+    let tasksPath;
+    try {
+      tasksPath = findTasksJsonPath(args, log);
+    } catch (error) {
+      log.error(`Error finding tasks file: ${error.message}`);
+      return { 
+        success: false, 
+        error: { code: 'TASKS_FILE_ERROR', message: error.message },
+        fromCache: false 
+      };
+    }
+    
+    // Get research flag
+    const useResearch = args.research === true;
+    
+    log.info(`Updating task with ID ${taskId} with prompt "${args.prompt}" and research: ${useResearch}`);
+    
+    // Execute core updateTaskById function
+    await updateTaskById(tasksPath, taskId, args.prompt, useResearch);
+    
+    // Since updateTaskById doesn't return a value but modifies the tasks file,
+    // we'll return a success message
+    return {
+      success: true,
+      data: {
+        message: `Successfully updated task with ID ${taskId} based on the prompt`,
+        taskId,
+        tasksPath,
+        useResearch
+      },
+      fromCache: false // This operation always modifies state and should never be cached
+    };
+  } catch (error) {
+    log.error(`Error updating task by ID: ${error.message}`);
+    return { 
+      success: false, 
+      error: { code: 'UPDATE_TASK_ERROR', message: error.message || 'Unknown error updating task' },
+      fromCache: false 
+    };
+  }
+} 

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

@@ -9,6 +9,7 @@ import { listTasksDirect } from './direct-functions/list-tasks.js';
 import { getCacheStatsDirect } from './direct-functions/cache-stats.js';
 import { parsePRDDirect } from './direct-functions/parse-prd.js';
 import { updateTasksDirect } from './direct-functions/update-tasks.js';
+import { updateTaskByIdDirect } from './direct-functions/update-task-by-id.js';
 
 // Re-export utility functions
 export { findTasksJsonPath } from './utils/path-utils.js';
@@ -19,6 +20,7 @@ export {
   getCacheStatsDirect,
   parsePRDDirect,
   updateTasksDirect,
+  updateTaskByIdDirect,
 };
 
 /**
@@ -30,5 +32,6 @@ export const directFunctions = {
   cacheStats: getCacheStatsDirect,
   parsePRD: parsePRDDirect,
   update: updateTasksDirect,
+  updateTask: updateTaskByIdDirect,
   // Add more functions as we implement them
 };