feat(tags): Complete show and add-task command tag support

- show command: Added --tag flag, fixed projectRoot passing to UI functions
- add-task command: Already had proper tag support and projectRoot handling
- Both commands now work correctly with tagged task lists system
- Migration logic works properly when viewing and adding tasks
- Updated subtask 103.5 with progress on high-priority command fixes

scripts/modules/commands.js

@@ -1776,6 +1776,7 @@ ${result.result}
 			'-r, --research',
 			'Whether to use research capabilities for task creation'
 		)
+		.option('--tag <tag>', 'Specify tag context for task operations')
 		.action(async (options) => {
 			const isManualCreation = options.title && options.description;
 
@@ -1800,6 +1801,10 @@ ${result.result}
 
 			// Correctly determine projectRoot
 			const projectRoot = findProjectRoot();
+			if (!projectRoot) {
+				console.error(chalk.red('Error: Could not find project root.'));
+				process.exit(1);
+			}
 
 			let manualTaskData = null;
 			if (isManualCreation) {
@@ -1835,6 +1840,7 @@ ${result.result}
 
 			const context = {
 				projectRoot,
+				tag: options.tag,
 				commandName: 'add-task',
 				outputType: 'cli'
 			};
@@ -1907,9 +1913,17 @@ ${result.result}
 			'Path to the complexity report file',
 			COMPLEXITY_REPORT_FILE
 		)
+		.option('--tag <tag>', 'Specify tag context for task operations')
 		.action(async (taskId, options) => {
+			const projectRoot = findProjectRoot();
+			if (!projectRoot) {
+				console.error(chalk.red('Error: Could not find project root.'));
+				process.exit(1);
+			}
+
 			const idArg = taskId || options.id;
 			const statusFilter = options.status;
+			const tag = options.tag;
 
 			if (!idArg) {
 				console.error(chalk.red('Error: Please provide a task ID'));
@@ -1931,11 +1945,19 @@ ${result.result}
 					tasksPath,
 					taskIds,
 					reportPath,
-					statusFilter
+					statusFilter,
+					{ projectRoot, tag }
 				);
 			} else {
 				// Single task - use detailed view
-				await displayTaskById(tasksPath, taskIds[0], reportPath, statusFilter);
+				await displayTaskById(
+					tasksPath,
+					taskIds[0],
+					reportPath,
+					statusFilter,
+					tag,
+					{ projectRoot }
+				);
 			}
 		});
 

scripts/modules/ui.js

@@ -1177,10 +1177,14 @@ async function displayTaskById(
 	taskId,
 	complexityReportPath = null,
 	statusFilter = null,
-	tag = null
+	tag = null,
+	context = {}
 ) {
-	// Read the tasks file
-	const data = readJSON(tasksPath, tag);
+	// Extract projectRoot from context
+	const projectRoot = context.projectRoot || null;
+
+	// Read the tasks file with proper projectRoot for tag resolution
+	const data = readJSON(tasksPath, projectRoot, tag);
 	if (!data || !data.tasks) {
 		log('error', 'No valid tasks found.');
 		process.exit(1);
@@ -2220,17 +2224,23 @@ function displayAiUsageSummary(telemetryData, outputType = 'cli') {
  * @param {Array<string>} taskIds - Array of task IDs to display
  * @param {string} complexityReportPath - Path to complexity report
  * @param {string} statusFilter - Optional status filter for subtasks
+ * @param {Object} context - Optional context object containing projectRoot and tag
  */
 async function displayMultipleTasksSummary(
 	tasksPath,
 	taskIds,
 	complexityReportPath = null,
-	statusFilter = null
+	statusFilter = null,
+	context = {}
 ) {
 	displayBanner();
 
-	// Read the tasks file
-	const data = readJSON(tasksPath);
+	// Extract projectRoot and tag from context
+	const projectRoot = context.projectRoot || null;
+	const tag = context.tag || null;
+
+	// Read the tasks file with proper projectRoot for tag resolution
+	const data = readJSON(tasksPath, projectRoot, tag);
 	if (!data || !data.tasks) {
 		log('error', 'No valid tasks found.');
 		process.exit(1);
@@ -2564,7 +2574,9 @@ async function displayMultipleTasksSummary(
 				tasksPath,
 				choice.trim(),
 				complexityReportPath,
-				statusFilter
+				statusFilter,
+				tag,
+				context
 			);
 		}
 	} else {