# AI FileSystem MCP - Change Log
## Version 2.1.0 - 2025-01-28 - Command Pattern Refactoring Complete 🎉
### Major Architecture Changes
#### Command Pattern Migration (100% Complete)
- Successfully migrated all 39 commands from monolithic switch statement to Command Pattern
- Completed migration of final 7 Metadata Commands:
- `analyze_project`
- `get_file_metadata`
- `get_directory_tree`
- `compare_files`
- `find_duplicate_files`
- `create_symlink`
- `diff_files`
### Improvements
- **Code Organization**: Commands now organized by category (file, search, git, security, etc.)
- **Maintainability**: Each command is now a self-contained class with clear responsibilities
- **Type Safety**: Enhanced type checking with dedicated input validation
- **Extensibility**: Adding new commands is now as simple as creating a new Command class
- **Testing**: Easier unit testing with isolated command implementations
### Technical Details
- Reduced main index.ts from 700+ lines to modular architecture
- Created CommandRegistry for centralized command management
- Implemented gradual migration strategy with LegacyCommands support
- Added comprehensive validation helpers in base Command class
### Next Steps (Phase 2 & 3)
- Decompose FileSystemManager (31KB) into service modules
- Implement Generic Command types for better type inference
- Add Zod/io-ts for runtime type validation
- Performance optimizations with streaming and worker threads
## Version 2.0.0 - Major Update
### New Features
#### 1. Transaction Support
- Atomic multi-file operations
- Automatic rollback on failure
- Backup management
- Support for write, update, and delete operations
#### 2. Git Integration
- Check repository status
- Commit changes directly
- View diffs and logs
- Branch management
- Stash support
#### 3. Real-time File Watching
- Monitor files and directories for changes
- Event-based notifications
- Change history tracking
- Statistics and reporting
#### 4. AST-based Code Modification
- TypeScript/JavaScript code analysis
- Intelligent code transformations
- Symbol renaming
- Import management
- Function and property manipulation
#### 5. Enhanced File Operations
- File metadata retrieval (permissions, hash, MIME type)
- Directory tree visualization
- File comparison
- Duplicate file detection
- Symbolic link support
- Safe file moving
### Improvements
- Better error handling with specific error messages
- Improved caching mechanism
- More comprehensive project analysis
- Added TypeScript as runtime dependency for AST processing
### API Changes
New tools added:
- `create_transaction` - Create atomic file operation transactions
- `git_status` - Get git repository status
- `git_commit` - Commit changes to git
- `start_watching` - Start watching files for changes
- `stop_watching` - Stop file watching
- `get_watcher_stats` - Get file watcher statistics
- `analyze_code` - Analyze code structure using AST
- `modify_code` - Modify code using AST transformations
- `get_file_metadata` - Get detailed file metadata
- `get_directory_tree` - Get directory structure as tree
- `compare_files` - Compare two files
- `find_duplicate_files` - Find duplicate files
- `create_symlink` - Create symbolic links
- `move_file` - Move or rename files
### Technical Details
- Added 5 new core modules:
- `Transaction.ts` - Transaction management
- `GitIntegration.ts` - Git operations
- `FileWatcher.ts` - File monitoring
- `ASTProcessor.ts` - Code analysis and modification
- `FileUtils.ts` - Advanced file operations
- Total lines of code increased from ~250 to ~1500+
- Maintained backward compatibility with all existing tools
