fix: Improve MCP server robustness and debugging

- Refactor  for more reliable project root detection, particularly when running within integrated environments like Cursor IDE. Includes deriving root from script path and avoiding fallback to '/'.
- Enhance error handling in :
    - Add detailed debug information (paths searched, CWD, etc.) to the error message when  is not found in the provided project root.
    - Improve clarity of error messages and potential solutions.
- Add verbose logging in  to trace session object content and the finally resolved project root path, aiding in debugging path-related issues.
- Add default values for  and  to the example  environment configuration.

mcp-server/src/tools/update.js

@@ -6,7 +6,8 @@
 import { z } from "zod";
 import {
   handleApiResult,
-  createErrorResponse
+  createErrorResponse,
+  getProjectRootFromSession
 } from "./utils.js";
 import { updateTasksDirect } from "../core/task-master-core.js";
 
@@ -17,10 +18,10 @@ import { updateTasksDirect } from "../core/task-master-core.js";
 export function registerUpdateTool(server) {
   server.addTool({
     name: "update",
-    description: "Update tasks with ID >= specified ID based on the provided prompt",
+    description: "Update multiple upcoming tasks (with ID >= 'from' ID) based on new context or changes provided in the prompt.",
     parameters: z.object({
-      from: z.union([z.number(), z.string()]).describe("Task ID from which to start updating"),
-      prompt: z.string().describe("Explanation of changes or new context"),
+      from: z.union([z.number(), z.string()]).describe("Task ID from which to start updating (inclusive)"),
+      prompt: z.string().describe("Explanation of changes or new context to apply"),
       research: z.boolean().optional().describe("Use Perplexity AI for research-backed updates"),
       file: z.string().optional().describe("Path to the tasks file"),
       projectRoot: z
@@ -30,17 +31,31 @@ export function registerUpdateTool(server) {
           "Root directory of the project (default: current working directory)"
         ),
     }),
-    execute: async (args, { log }) => {
+    execute: async (args, { log, session, reportProgress }) => {
       try {
         log.info(`Updating tasks with args: ${JSON.stringify(args)}`);
+        await reportProgress({ progress: 0 });
         
-        // Call the direct function wrapper
-        const result = await updateTasksDirect(args, log);
+        let rootFolder = getProjectRootFromSession(session, log);
         
-        // Log result
-        log.info(`${result.success ? `Successfully updated tasks from ID ${args.from}` : 'Failed to update tasks'}`);
+        if (!rootFolder && args.projectRoot) {
+          rootFolder = args.projectRoot;
+          log.info(`Using project root from args as fallback: ${rootFolder}`);
+        }
+        
+        const result = await updateTasksDirect({
+          projectRoot: rootFolder,
+          ...args
+        }, log, { reportProgress, mcpLog: log, session});
+        
+        await reportProgress({ progress: 100 });
+        
+        if (result.success) {
+          log.info(`Successfully updated tasks from ID ${args.from}: ${result.data.message}`);
+        } else {
+          log.error(`Failed to update tasks: ${result.error?.message || 'Unknown error'}`);
+        }
         
-        // Use handleApiResult to format the response
         return handleApiResult(result, log, 'Error updating tasks');
       } catch (error) {
         log.error(`Error in update tool: ${error.message}`);