Worked on the psf/black repository to enhance the parser’s error feedback by implementing multi-line parse error messages with a clear error pointer, improving the clarity and usability of error outputs. Focused on refining the handling of TokenError and ParseError exceptions, the work included updating both documentation and tests to align with the new error format. Ensured code quality by addressing flake8 and mypy issues and reformatting relevant files with Black. Leveraged Python for both implementation and testing, with an emphasis on robust error handling and comprehensive documentation, ultimately reducing debugging time and improving the maintainability and reliability of the parser.