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

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

@@ -0,0 +1,49 @@
+/**
+ * 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);
+      }
+    },
+  });
+}