Worked on enhancing the MoneyPrinterTurbo repository by addressing a critical edge case in the video processing pipeline. Focused on improving the reliability of video merging by adding targeted test coverage for scenarios where the video_transition_mode parameter is None, preventing potential crashes and ensuring robust handling of null values. Applied test-driven development practices using Python, with an emphasis on testing and video processing skills. Maintained strong commit hygiene by attaching explicit tests to core logic, ensuring no regressions in existing features. The work contributed to a more stable CI feedback loop and improved the overall resilience of the video merging functionality.