Worked on the ppy/osu repository to enhance the user experience by improving the beatmap length tooltip display within the difficulty icon. Focused on refining how beatmap durations are presented, the developer implemented a robust formatting approach in C# that accurately displays hours and applies conditional formatting for both short and long durations. Centralized the duration formatting logic through the ToFormattedDuration method, ensuring consistency and maintainability across the UI. This work involved iterative code improvement, UI development, and careful refactoring, resulting in a more precise and readable duration display that aligns with the application's quality and consistency objectives.