- Rewrite packed file parser with finite state machines to improve code readability (#16).
- Use isort to sort import statements for all Python files (#15).
- Refactor type hints to use built-in generics and base abstract classes following typing best practices (#11).
- Use PEP 604 style shorthand syntax for union and optional types (#10).
- Use pathspec to handle ignore pattern matching. This makes the packing feature work properly under Windows (#7).
- Read and write text files using UTF-8 encoding on all platforms (#7).