fix(move-task): Fix critical bugs in task move functionality

- Fixed parent-to-parent task moves where original task would remain as duplicate
- Fixed moving tasks to become subtasks of empty parents (validation errors)
- Fixed moving subtasks between different parent tasks
- Improved comma-separated batch moves with proper error handling
- Updated MCP tool to use core logic instead of custom implementation
- Resolves task duplication issues and enables proper task hierarchy reorganization

mcp-server/src/tools/move-task.js

@@ -3,14 +3,14 @@
  * Tool for moving tasks or subtasks to a new position
  */
 
-import { z } from 'zod';
+import { z } from "zod";
 import {
   handleApiResult,
   createErrorResponse,
-	withNormalizedProjectRoot
-} from './utils.js';
-import { moveTaskDirect } from '../core/task-master-core.js';
-import { findTasksPath } from '../core/utils/path-utils.js';
+  withNormalizedProjectRoot,
+} from "./utils.js";
+import { moveTaskDirect } from "../core/task-master-core.js";
+import { findTasksPath } from "../core/utils/path-utils.js";
 
 /**
  * Register the moveTask tool with the MCP server
@@ -18,8 +18,8 @@ import { findTasksPath } from '../core/utils/path-utils.js';
  */
 export function registerMoveTaskTool(server) {
   server.addTool({
-		name: 'move_task',
-		description: 'Move a task or subtask to a new position',
+    name: "move_task",
+    description: "Move a task or subtask to a new position",
     parameters: z.object({
       from: z
         .string()
@@ -31,12 +31,12 @@ export function registerMoveTaskTool(server) {
         .describe(
           'ID of the destination (e.g., "7" or "7.3"). Must match the number of source IDs if comma-separated'
         ),
-			file: z.string().optional().describe('Custom path to tasks.json file'),
+      file: z.string().optional().describe("Custom path to tasks.json file"),
       projectRoot: z
         .string()
         .describe(
-					'Root directory of the project (typically derived from session)'
-				)
+          "Root directory of the project (typically derived from session)"
+        ),
     }),
     execute: withNormalizedProjectRoot(async (args, { log, session }) => {
       try {
@@ -48,14 +48,14 @@ export function registerMoveTaskTool(server) {
         }
 
         // Parse comma-separated IDs
-				const fromIds = args.from.split(',').map((id) => id.trim());
-				const toIds = args.to.split(',').map((id) => id.trim());
+        const fromIds = args.from.split(",").map((id) => id.trim());
+        const toIds = args.to.split(",").map((id) => id.trim());
 
         // Validate matching IDs count
         if (fromIds.length !== toIds.length) {
           return createErrorResponse(
-						'The number of source and destination IDs must match',
-						'MISMATCHED_ID_COUNT'
+            "The number of source and destination IDs must match",
+            "MISMATCHED_ID_COUNT"
           );
         }
 
@@ -79,7 +79,7 @@ export function registerMoveTaskTool(server) {
                 sourceId: fromId,
                 destinationId: toId,
                 tasksJsonPath,
-								projectRoot: args.projectRoot
+                projectRoot: args.projectRoot,
               },
               log,
               { session }
@@ -99,8 +99,8 @@ export function registerMoveTaskTool(server) {
               success: true,
               data: {
                 moves: results,
-								message: `Successfully moved ${results.length} tasks`
-							}
+                message: `Successfully moved ${results.length} tasks`,
+              },
             },
             log
           );
@@ -112,7 +112,7 @@ export function registerMoveTaskTool(server) {
                 sourceId: args.from,
                 destinationId: args.to,
                 tasksJsonPath,
-								projectRoot: args.projectRoot
+                projectRoot: args.projectRoot,
               },
               log,
               { session }
@@ -123,9 +123,9 @@ export function registerMoveTaskTool(server) {
       } catch (error) {
         return createErrorResponse(
           `Failed to move task: ${error.message}`,
-					'MOVE_TASK_ERROR'
+          "MOVE_TASK_ERROR"
         );
       }
-		})
+    }),
   });
 }