feat(tagged-tasks): Complete core tag management system implementation

- Implements comprehensive tagged task lists system for multi-context task management including core tag management functions (Task 103.11), MCP integration updates, and foundational infrastructure for tagged task operations. Features tag CRUD operations, validation, metadata tracking, deep task copying, and full backward compatibility.

.changeset/six-cups-see.md

@@ -2,29 +2,34 @@
 "task-master-ai": minor
 ---
 
-Introduces tagged task lists for multi-context task management
+Implements core tagged task lists system with full CLI support
 
-This release adds support for organizing tasks into separate lists (tags) to enable working across multiple contexts such as different branches, environments, or project phases without conflicts.
+This release adds tagged task lists for multi-context task management, enabling users to organize tasks into separate contexts like "master", "feature-branch", teammate names or "v2" without conflicts.
 
 **New Features:**
 
-- **Tagged Task Lists**: Organize tasks into separate contexts with tags like "master", "feature-branch", or "v2.0"
+- **Complete Tag Management CLI**: Full suite of tag commands (`tags`, `add-tag`, `delete-tag`, `use-tag`, `rename-tag`, `copy-tag`)
+- **Tagged Task Lists**: Organize tasks into separate contexts with complete isolation between tags
 - **Seamless Migration**: Existing projects automatically migrate to use a "master" tag with zero disruption
+- **Enhanced Delete Confirmation**: Double confirmation with inquirer prompts for destructive tag operations
+- **Master Tag Metadata**: Automatic metadata enhancement for existing tags with creation dates and descriptions
+- **Dynamic Task Counting**: Real-time task count calculation without stored counters
+- **Full Terminal Width Tables**: Responsive table layouts that adapt to terminal size
 - **Backward Compatibility**: All existing commands continue to work exactly as before
-- **Tag Management**: Commands to create, switch between, and manage different task contexts
-- **Git Integration**: Automatically create tags based on git branch names
-- **Context Isolation**: Tasks in different tags are completely separate and isolated
 
-**Migration:**
+**Tag Management Commands:**
 
-- Existing `tasks.json` files are automatically migrated to the new tagged format
-- Your tasks will appear under the "master" tag by default
-- No action required - migration happens transparently on first use
-- All existing workflows continue to work unchanged
+- `task-master tags [--show-metadata]` - List all available tags with task counts and metadata
+- `task-master add-tag <name> [--copy-from-current] [--copy-from=<tag>] [-d="<desc>"]` - Create new tag contexts
+- `task-master delete-tag <name> [--yes]` - Delete tags with double confirmation (changed from `--force` to `--yes`)
+- `task-master use-tag <name>` - Switch between tag contexts
+- `task-master rename-tag <old> <new>` - Rename existing tags
+- `task-master copy-tag <source> <target> [-d="<desc>"]` - Copy tags to create new contexts
 
-**Coming in Part 2:**
+**Migration & Compatibility:**
+
+- Existing `tasks.json` files are automatically migrated to tagged format
+- Master tag gets proper metadata (creation date, description) during migration
+- All existing workflows continue unchanged
+- Silent migration with user-friendly notifications
 
-- CLI commands for tag management (`add-tag`, `use-tag`, `list-tags`)
-- MCP tool support for tag operations
-- Enhanced git branch integration
-- Tag switching and context management