Contributed to the uutils/coreutils repository by enhancing the PTX utility to improve error diagnostics during file operations. Developed a feature that includes the filename in open and read error messages, addressing a gap that previously made debugging more difficult for users. The implementation focused on robust error handling in Rust, ensuring that the new messages provided clear context without affecting performance or altering the existing API. Comprehensive unit tests were added to verify the accuracy and formatting of the updated error messages, resulting in improved test coverage and more informative feedback for users encountering file access issues in PTX.