Fix/expand command tag corruption (#827)

* fix(expand): Fix tag corruption in expand command - Fix tag parameter passing through MCP expand-task flow - Add tag parameter to direct function and tool registration - Fix contextGatherer method name from _buildDependencyContext to _buildDependencyGraphs - Add comprehensive test coverage for tag handling in expand-task - Ensures tagged task structure is preserved during expansion - Prevents corruption when tag is undefined. Fixes expand command causing tag corruption in tagged task lists. All existing tests pass and new test coverage added.

* test(e2e): Add comprehensive tag-aware expand testing to verify tag corruption fix - Add new test section for feature-expand tag creation and testing - Verify tag preservation during expand, force expand, and expand --all operations - Test that master tag remains intact and feature-expand tag receives subtasks correctly - Fix file path references to use correct .taskmaster/tasks/tasks.json location - Fix config file check to use .taskmaster/config.json instead of .taskmasterconfig - All tag corruption verification tests pass successfully in E2E test

* fix(changeset): Update E2E test improvements changeset to properly reflect tag corruption fix verification

* chore(changeset): combine duplicate changesets for expand tag corruption fix

Merge eighty-breads-wonder.md into bright-llamas-enter.md to consolidate
the expand command fix and its comprehensive E2E testing enhancements
into a single changeset entry.

* Delete .changeset/eighty-breads-wonder.md

* Version Packages

* chore: fix package.json

* fix(expand): Enhance context handling in expandAllTasks function
- Added `tag` to context destructuring for better context management.
- Updated `readJSON` call to include `contextTag` for improved data integrity.
- Ensured the correct tag is passed during task expansion to prevent tag corruption.

---------

Co-authored-by: Parththipan Thaniperumkarunai <parththipan.thaniperumkarunai@milkmonkey.de>
Co-authored-by: Parthy <52548018+mm-parthy@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

mcp-server/src/core/direct-functions/expand-task.js

@@ -26,6 +26,7 @@ import { createLogWrapper } from '../../tools/utils.js';
  * @param {string} [args.prompt] - Additional context to guide subtask generation.
  * @param {boolean} [args.force] - Force expansion even if subtasks exist.
  * @param {string} [args.projectRoot] - Project root directory.
+ * @param {string} [args.tag] - Tag for the task
  * @param {Object} log - Logger object
  * @param {Object} context - Context object containing session
  * @param {Object} [context.session] - MCP Session object
@@ -34,7 +35,8 @@ import { createLogWrapper } from '../../tools/utils.js';
 export async function expandTaskDirect(args, log, context = {}) {
 	const { session } = context; // Extract session
 	// Destructure expected args, including projectRoot
-	const { tasksJsonPath, id, num, research, prompt, force, projectRoot } = args;
+	const { tasksJsonPath, id, num, research, prompt, force, projectRoot, tag } =
+		args;
 
 	// Log session root data for debugging
 	log.info(
@@ -194,7 +196,8 @@ export async function expandTaskDirect(args, log, context = {}) {
 					session,
 					projectRoot,
 					commandName: 'expand-task',
-					outputType: 'mcp'
+					outputType: 'mcp',
+					tag
 				},
 				forceFlag
 			);

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

@@ -45,7 +45,8 @@ export function registerExpandTaskTool(server) {
 				.boolean()
 				.optional()
 				.default(false)
-				.describe('Force expansion even if subtasks exist')
+				.describe('Force expansion even if subtasks exist'),
+			tag: z.string().optional().describe('Tag context to operate on')
 		}),
 		execute: withNormalizedProjectRoot(async (args, { log, session }) => {
 			try {
@@ -73,7 +74,8 @@ export function registerExpandTaskTool(server) {
 						research: args.research,
 						prompt: args.prompt,
 						force: args.force,
-						projectRoot: args.projectRoot
+						projectRoot: args.projectRoot,
+						tag: args.tag || 'master'
 					},
 					log,
 					{ session }