feat(mcp): Implement add-dependency MCP command for creating dependency relationships between tasks

mcp-server/src/core/direct-functions/add-dependency.js

@@ -0,0 +1,75 @@
+/**
+ * add-dependency.js
+ * Direct function implementation for adding a dependency to a task
+ */
+
+import { addDependency } from '../../../../scripts/modules/dependency-manager.js';
+import { findTasksJsonPath } from '../utils/path-utils.js';
+
+/**
+ * Direct function wrapper for addDependency with error handling.
+ * 
+ * @param {Object} args - Command arguments
+ * @param {string|number} args.id - Task ID to add dependency to
+ * @param {string|number} args.dependsOn - Task ID that will become a dependency
+ * @param {string} [args.file] - Path to the tasks file
+ * @param {string} [args.projectRoot] - Project root directory
+ * @param {Object} log - Logger object
+ * @returns {Promise<Object>} - Result object with success status and data/error information
+ */
+export async function addDependencyDirect(args, log) {
+  try {
+    log.info(`Adding dependency with args: ${JSON.stringify(args)}`);
+    
+    // Validate required parameters
+    if (!args.id) {
+      return {
+        success: false,
+        error: {
+          code: 'INPUT_VALIDATION_ERROR',
+          message: 'Task ID (id) is required'
+        }
+      };
+    }
+    
+    if (!args.dependsOn) {
+      return {
+        success: false,
+        error: {
+          code: 'INPUT_VALIDATION_ERROR',
+          message: 'Dependency ID (dependsOn) is required'
+        }
+      };
+    }
+    
+    // Find the tasks.json path
+    const tasksPath = findTasksJsonPath(args, log);
+    
+    // Format IDs for the core function
+    const taskId = args.id.includes && args.id.includes('.') ? args.id : parseInt(args.id, 10);
+    const dependencyId = args.dependsOn.includes && args.dependsOn.includes('.') ? args.dependsOn : parseInt(args.dependsOn, 10);
+    
+    log.info(`Adding dependency: task ${taskId} will depend on ${dependencyId}`);
+    
+    // Call the core function
+    await addDependency(tasksPath, taskId, dependencyId);
+    
+    return {
+      success: true,
+      data: {
+        message: `Successfully added dependency: Task ${taskId} now depends on ${dependencyId}`,
+        taskId: taskId,
+        dependencyId: dependencyId
+      }
+    };
+  } catch (error) {
+    log.error(`Error in addDependencyDirect: ${error.message}`);
+    return {
+      success: false,
+      error: {
+        code: 'CORE_FUNCTION_ERROR',
+        message: error.message
+      }
+    };
+  }
+} 

mcp-server/src/tools/add-dependency.js

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+/**
+ * tools/add-dependency.js
+ * Tool for adding a dependency to a task
+ */
+
+import { z } from "zod";
+import {
+  handleApiResult,
+  createErrorResponse
+} from "./utils.js";
+import { addDependencyDirect } from "../core/task-master-core.js";
+
+/**
+ * Register the addDependency tool with the MCP server
+ * @param {Object} server - FastMCP server instance
+ */
+export function registerAddDependencyTool(server) {
+  server.addTool({
+    name: "add_dependency",
+    description: "Add a dependency relationship between two tasks",
+    parameters: z.object({
+      id: z.string().describe("ID of task that will depend on another task"),
+      dependsOn: z.string().describe("ID of task that will become a dependency"),
+      file: z.string().optional().describe("Path to the tasks file (default: tasks/tasks.json)"),
+      projectRoot: z.string().optional().describe("Root directory of the project (default: current working directory)")
+    }),
+    execute: async (args, { log }) => {
+      try {
+        log.info(`Adding dependency for task ${args.id} to depend on ${args.dependsOn} with args: ${JSON.stringify(args)}`);
+        
+        // Call the direct function wrapper
+        const result = await addDependencyDirect(args, log);
+        
+        // Log result
+        if (result.success) {
+          log.info(`Successfully added dependency: ${result.data.message}`);
+        } else {
+          log.error(`Failed to add dependency: ${result.error.message}`);
+        }
+        
+        // Use handleApiResult to format the response
+        return handleApiResult(result, log, 'Error adding dependency');
+      } catch (error) {
+        log.error(`Error in addDependency tool: ${error.message}`);
+        return createErrorResponse(error.message);
+      }
+    },
+  });
+}