George Chen enhanced repository hygiene for the au-ts/sddf project by implementing targeted .gitignore patterns to exclude Vim swap and temporary editor files. Using Git and version control best practices, he addressed the common issue of extraneous files cluttering git status outputs and pull request diffs, which can hinder code review efficiency. His approach established a repeatable pattern for maintaining clean repository histories, supporting smoother collaboration among developers. Although the work focused on a single feature over one month, it demonstrated a thoughtful application of version control principles to improve workflow quality and set a foundation for consistent repository management practices.