Worked on the gitlab-runner repository to enhance the reliability of archive creation by addressing a bug related to gzip header handling. Focused on sanitizing file paths containing non-ASCII and special characters, the solution ensured proper encoding within gzip headers, thereby preventing errors during artifact packaging across different locales. The approach involved a targeted patch in Go, emphasizing minimal code changes and maintaining API stability. Leveraging skills in data serialization, file handling, and string manipulation, the work improved user experience by reducing failure rates in artifact archiving, while comprehensive testing validated the fix’s effectiveness in diverse file path scenarios.