Miguel de Sousa focused on reliability improvements in the MuseScore repository, addressing a specific issue in the note-entry path for Laissez Vibrer ties. He resolved a bug where adding a note to a tied note could create unintended double noteheads, refining the put_note logic to handle these scenarios correctly. Using C++ and leveraging his experience in music notation software development and unit testing, Miguel implemented targeted regression tests to ensure the fix’s robustness. His work enhanced notation accuracy and user-visible correctness, contributing to code quality and user trust. The depth of his contribution lay in precise bug resolution and comprehensive test coverage.