Lok An Chung contributed to the musescore/MuseScore repository by addressing a nuanced issue in musical notation handling, specifically focusing on the accuracy of rest regrouping within the score representation pipeline. Using C++ and drawing on expertise in music notation software development, Lok prevented tuplet merging during rest regrouping, thereby preserving the integrity of musical scores during playback and export. The solution involved targeted debugging and the addition of regression tests to cover edge cases, reflecting a deep understanding of the codebase. Lok’s work enhanced the reliability of notation processing, demonstrating careful attention to both technical detail and long-term maintainability.