Implement expand-all MCP command for expanding all pending tasks with subtasks

mcp-server/src/tools/expand-all.js

@@ -0,0 +1,51 @@
+/**
+ * tools/expand-all.js
+ * Tool for expanding all pending tasks with subtasks
+ */
+
+import { z } from "zod";
+import {
+  handleApiResult,
+  createErrorResponse
+} from "./utils.js";
+import { expandAllTasksDirect } from "../core/task-master-core.js";
+
+/**
+ * Register the expandAll tool with the MCP server
+ * @param {Object} server - FastMCP server instance
+ */
+export function registerExpandAllTool(server) {
+  server.addTool({
+    name: "expand_all",
+    description: "Expand all pending tasks into subtasks",
+    parameters: z.object({
+      num: z.union([z.number(), z.string()]).optional().describe("Number of subtasks to generate for each task"),
+      research: z.boolean().optional().describe("Enable Perplexity AI for research-backed subtask generation"),
+      prompt: z.string().optional().describe("Additional context to guide subtask generation"),
+      force: z.boolean().optional().describe("Force regeneration of subtasks for tasks that already have them"),
+      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(`Expanding all tasks with args: ${JSON.stringify(args)}`);
+        
+        // Call the direct function wrapper
+        const result = await expandAllTasksDirect(args, log);
+        
+        // Log result
+        if (result.success) {
+          log.info(`All tasks expanded successfully: ${result.data.message}`);
+        } else {
+          log.error(`Failed to expand tasks: ${result.error.message}`);
+        }
+        
+        // Use handleApiResult to format the response
+        return handleApiResult(result, log, 'Error expanding tasks');
+      } catch (error) {
+        log.error(`Error in expandAll tool: ${error.message}`);
+        return createErrorResponse(error.message);
+      }
+    },
+  });
+}