Worked on stabilizing keyboard input reliability in the qmk/qmk_firmware repository, focusing on resolving a race condition that caused ghost modifier keys on macOS when using Karabiner Elements. Addressed this issue by implementing a controlled delay in the firmware, ensuring keyboard reports were fully processed before emitting consumer keycodes. This approach reduced unintended modifier states and improved the overall user experience for macOS users and external tooling. The work demonstrated proficiency in C programming, firmware development, and race-condition mitigation, with careful attention to code review and commit hygiene throughout the process. No new features were added during this period.