Worked on the nextcloud/server repository to enhance file handling by implementing support for MusicXML MIME types, enabling more accurate recognition and management of music notation files within the application. Addressed a copy-paste error in MIME type processing, which improved the stability and reliability of file operations for MusicXML assets. Focused on backend development using PHP, applying a disciplined approach to release management and technical ownership. The work centered on core service changes, ensuring that new MIME types were integrated seamlessly into existing workflows. No bugs were reported or fixed during this period, reflecting a targeted and well-scoped engineering contribution.