- Implemented performance optimizations including improved singleton pattern and card lookup efficiency.
- Enhanced error handling with a unified error type system and context-aware error messages.
- Introduced a strong type validation framework for input validation, including sanitization functions.
- Improved code quality through consistent formatting, ES module compatibility, and enhanced documentation.
- Expanded test coverage with detailed tests for reading manager and error handling scenarios.
- Created a simple test runner to validate optimizations and performance metrics.
