Yal Lu focused on maintaining and improving the integrity of the UCSD-E4E/smartfin-fw3 codebase, addressing technical debt rather than delivering new user-facing features. Their primary contribution involved removing a stray waterSensor.cpp file, which restored repository consistency and reduced potential confusion for future contributors. Working with C++ and Git, Yal emphasized codebase hygiene to ensure more reliable builds and smoother onboarding for new developers. This cleanup did not alter functionality but laid a stronger foundation for future development. The work demonstrated attention to maintainability and process quality, reflecting a methodical approach to long-term project health and engineering best practices.