Worked on the ppy/osu repository to address a cross-platform file handling issue affecting .osu file exports. Focused on resolving inconsistencies in line endings that caused spurious file-change detections and potential data loss when users switched between Windows and Unix-like systems. Implemented a solution in C# by explicitly setting StreamWriter.NewLine to "\r\n", ensuring that CRLF line endings are used consistently across all platforms. This change stabilized beatmap update histories and improved local score handling for game development workflows. The work demonstrated attention to detail in unit testing and cross-platform compatibility, contributing to a more reliable mapper experience.