Implement comprehensive type annotations and mypy configuration as part
of code quality initiative. Achieve 100% type annotation coverage for
main CLI entry points and resolve Optional type inconsistencies.
## Key Improvements
### CLI Layer (100% Type Coverage)
- tddai_cli.py: Complete type annotations for all 21 functions
- cli/core.py: Full type coverage for CLI framework (20 functions)
- cli/commands/issues.py: Fixed Optional[List[str]] parameter types
- cli/commands/workspace.py: Improved type checker logic for Optional handling
### Service Layer Type Safety
- services/issue_service.py: Fixed Optional parameter type signatures
- services/project_service.py: Updated Optional type annotations
- tddai/issue_creator.py: Proper Optional[List[str]] usage
- tddai/project_manager.py: Fixed Optional parameter handling
### Mypy Configuration
- pyproject.toml: Added comprehensive mypy configuration
- Gradual adoption strategy with module-specific strictness
- Python 3.12 compatibility for proper type checking
- Incremental typing approach for legacy modules
## Technical Details
- Proper Optional vs Union type usage throughout
- Generic type annotations for collections
- Return type annotations for all public functions
- Fixed implicit Optional violations (PEP 484)
- Type checker logic improvements for better safety
## Benefits
- Improved IDE autocomplete and error detection
- Compile-time type checking for CLI commands
- Better maintainability and debugging capabilities
- Foundation for expanding type safety to remaining modules
Resolves#27 - Type safety improvements
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Co-Authored-By: Claude <noreply@anthropic.com>
Comprehensive error handling improvements addressing inconsistent patterns:
• Created markitect/exceptions.py with complete domain-specific exception hierarchy
- MarkitectError base class with context and cause chaining support
- Specific exceptions for Document, AST, Cache, Database, Schema operations
- Built-in logging and context preservation
• Fixed overly broad exception handling in tddai modules:
- issue_fetcher.py: Replace generic Exception with specific Gitea errors
- project_manager.py: Proper error translation with context preservation
- coverage_analyzer.py: Replace silent suppression with logging
• Enhanced cache_service.py error handling:
- Specific OSError/PermissionError handling for file operations
- Logging integration for unexpected errors
- Preserved error collection and reporting
• Implemented proper exception chaining patterns:
- All error translations use `raise ... from e` for debugging
- Preserved original exception context and stack traces
- Added docstring declarations of raised exceptions
• Benefits:
- Eliminates silent error suppression and debugging black holes
- Provides specific, actionable error messages
- Preserves full error context for troubleshooting
- Establishes consistent patterns for future development
Resolves issue #21: Error handling standardization
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
