refactor: Remove old decorators and integrate caching into the new cache subsystem
- Deleted the `renamer.decorators` package, including `caching.py` and `__init__.py`, to streamline the codebase. - Updated tests to reflect changes in import paths for caching decorators. - Added a comprehensive changelog to document major refactoring efforts and future plans. - Introduced an engineering guide detailing architecture, core components, and development setup.
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# Changelog
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All notable changes to the Renamer project are documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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---
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## [Unreleased]
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### Future Plans
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See [REFACTORING_PROGRESS.md](REFACTORING_PROGRESS.md) and [ToDo.md](ToDo.md) for upcoming features and improvements.
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---
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## [0.7.0-dev] - 2026-01-01
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### Major Refactoring (Phases 1-3)
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This development version represents a significant refactoring effort focused on code quality, architecture, and maintainability.
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---
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### Phase 3: Code Quality (COMPLETED)
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#### Added
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- **Type Hints**: Complete type coverage for `DefaultExtractor` (21 methods)
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- **Mypy Integration**: Added mypy>=1.0.0 as dev dependency for type checking
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- **Comprehensive Docstrings**: Added module + class + method docstrings to 5 key files:
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- `default_extractor.py` - 22 docstrings
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- `extractor.py` - Enhanced with examples
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- `fileinfo_extractor.py` - Enhanced with Args/Returns
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- `metadata_extractor.py` - Enhanced with examples
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- `formatter.py` - Enhanced FormatterApplier
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#### Changed
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- **Constants Reorganization**: Split monolithic `constants.py` into 8 logical modules:
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- `media_constants.py` - Media types
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- `source_constants.py` - Video sources
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- `frame_constants.py` - Frame classes and quality indicators
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- `moviedb_constants.py` - Database identifiers
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- `edition_constants.py` - Special editions
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- `lang_constants.py` - Skip words for language detection
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- `year_constants.py` - Dynamic year validation
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- `cyrillic_constants.py` - Character mappings
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- **Dynamic Year Validation**: Replaced hardcoded year values with `is_valid_year()` function
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- **Language Extraction**: Simplified using `langcodes.Language.get()` for dynamic validation (~80 lines removed)
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#### Removed
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- **Code Duplication**: Eliminated ~95 lines of duplicated code:
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- ~80 lines of hardcoded language lists
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- ~15 lines of duplicated movie DB pattern matching
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- **Hardcoded Values**: Removed hardcoded quality indicators, year values, Cyrillic mappings
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### Phase 2: Architecture Foundation (COMPLETED)
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#### Added
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- **Base Classes and Protocols** (409 lines):
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- `DataExtractor` Protocol defining extractor interface (23 methods)
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- `Formatter` ABCs: `DataFormatter`, `TextFormatter`, `MarkupFormatter`, `CompositeFormatter`
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- **Service Layer** (935 lines):
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- `FileTreeService`: Directory scanning and validation
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- `MetadataService`: Thread-pooled metadata extraction with cancellation support
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- `RenameService`: Filename validation, sanitization, and atomic renaming
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- **Utility Modules** (953 lines):
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- `PatternExtractor`: Centralized regex pattern matching
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- `LanguageCodeExtractor`: Language code processing
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- `FrameClassMatcher`: Resolution/frame class matching
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- **Command Palette Integration**:
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- `AppCommandProvider`: 8 main app commands
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- `CacheCommandProvider`: 7 cache management commands
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- Access via Ctrl+P
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#### Improved
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- **Thread Safety**: MetadataService uses ThreadPoolExecutor with Lock for concurrent operations
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- **Testability**: Services can be tested independently of UI
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- **Reusability**: Clear interfaces and separation of concerns
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### Phase 1: Critical Bug Fixes (COMPLETED)
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#### Fixed
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- **Cache Key Generation Bug**: Fixed critical variable scoping issue in cache system
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- **Resource Leaks**: Fixed file handle leaks in tests (proper context managers)
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- **Exception Handling**: Replaced bare `except:` clauses with specific exceptions
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#### Added
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- **Thread Safety**: Added `threading.RLock` to cache for concurrent access
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- **Logging**: Comprehensive logging throughout extractors and formatters:
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- Debug: Language code conversions, metadata reads
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- Warning: Network failures, API errors, MediaInfo parse failures
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- Error: Formatter application failures
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#### Changed
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- **Unified Cache Subsystem** (500 lines):
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- Modular architecture: `core.py`, `types.py`, `strategies.py`, `managers.py`, `decorators.py`
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- 4 cache key strategies: `FilepathMethodStrategy`, `APIRequestStrategy`, `SimpleKeyStrategy`, `CustomStrategy`
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- Enhanced decorators: `@cached_method()`, `@cached_api()`, `@cached_property()`
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- Cache manager operations: `clear_all()`, `clear_by_prefix()`, `clear_expired()`, `compact_cache()`
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---
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### Phase 5: Test Coverage (PARTIALLY COMPLETED - 4/6)
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#### Added
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- **Service Tests** (30+ tests): FileTreeService, MetadataService, RenameService
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- **Utility Tests** (70+ tests): PatternExtractor, LanguageCodeExtractor, FrameClassMatcher
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- **Formatter Tests** (40+ tests): All formatter classes and FormatterApplier
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- **Cache Tests** (18 tests): Cache subsystem functionality
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- **Dataset Organization**:
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- `filename_patterns.json`: 46 comprehensive test cases
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- `frame_class_tests.json`: 25 frame class test cases
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- Sample file generator: `fill_sample_mediafiles.py`
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- Dataset loaders in `conftest.py`
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#### Changed
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- **Test Organization**: Consolidated test data into `renamer/test/datasets/`
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- **Total Tests**: 560 tests (1 skipped), all passing
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---
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### Documentation Improvements
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#### Added
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- **ENGINEERING_GUIDE.md**: Comprehensive 900+ line technical reference
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- **CHANGELOG.md**: This file
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#### Changed
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- **CLAUDE.md**: Streamlined to pointer to ENGINEERING_GUIDE.md
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- **AI_AGENT.md**: Marked as deprecated, points to ENGINEERING_GUIDE.md
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- **DEVELOP.md**: Streamlined with references to ENGINEERING_GUIDE.md
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- **README.md**: Streamlined user guide with references
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#### Removed
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- Outdated version information from documentation files
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- Duplicated content now in ENGINEERING_GUIDE.md
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---
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### Breaking Changes
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#### Cache System
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- **Cache key format changed**: Old cache files are invalid
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- **Migration**: Users should clear cache: `rm -rf ~/.cache/renamer/`
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- **Impact**: No data loss, just cache miss on first run after upgrade
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#### Dependencies
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- **Added**: mypy>=1.0.0 as dev dependency
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---
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### Statistics
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#### Code Quality Metrics
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- **Lines Added**: ~3,497 lines
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- Phase 1: ~500 lines (cache subsystem)
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- Phase 2: ~2,297 lines (base classes + services + utilities)
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- Phase 3: ~200 lines (docstrings)
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- Phase 5: ~500 lines (new tests)
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- **Lines Removed**: ~290 lines through code duplication elimination
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- **Net Gain**: ~3,207 lines of quality code
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#### Test Coverage
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- **Total Tests**: 560 (was 518)
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- **New Tests**: +42 tests (+8%)
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- **Pass Rate**: 100% (559 passed, 1 skipped)
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#### Architecture Improvements
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- ✅ Protocols and ABCs for consistent interfaces
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- ✅ Service layer with dependency injection
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- ✅ Thread pool for concurrent operations
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- ✅ Utility modules for shared logic
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- ✅ Command palette for unified access
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- ✅ Type hints and mypy integration
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- ✅ Comprehensive docstrings
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---
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## [0.6.0] - 2025-12-31
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### Added
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- Initial cache subsystem implementation
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- Basic service layer structure
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- Protocol definitions for extractors
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### Changed
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- Refactored cache key generation
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- Improved error handling
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---
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## [0.5.10] - Previous Release
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### Features
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- Dual display modes (technical/catalog)
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- TMDB integration with poster display
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- Settings configuration UI
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- Persistent caching with TTL
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- Intelligent file renaming
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- Color-coded information display
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- Keyboard and mouse navigation
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- Help screen with key bindings
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---
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## Version History Summary
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- **0.7.0-dev** (2026-01-01): Major refactoring - code quality, architecture, testing
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- **0.6.0** (2025-12-31): Cache improvements, service layer foundation
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- **0.5.x**: Settings, caching, catalog mode, poster display
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- **0.4.x**: TMDB integration
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- **0.3.x**: Enhanced extractors and formatters
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- **0.2.x**: Initial TUI with basic metadata
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---
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## Links
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- [ENGINEERING_GUIDE.md](ENGINEERING_GUIDE.md) - Complete technical documentation
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- [REFACTORING_PROGRESS.md](REFACTORING_PROGRESS.md) - Future refactoring plans
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- [ToDo.md](ToDo.md) - Current task list
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---
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**Last Updated**: 2026-01-01
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