Worked on repository hygiene for the fullstackatbrown/project-necysc project by implementing a process to ignore and remove .history backup files. Leveraging skills in repository management and version control, the developer added .history to the .gitignore file using Git, ensuring that temporary history files would no longer be tracked. Existing .history backups were pruned from the repository, which improved maintainability and reduced unnecessary clutter in the commit history. This approach streamlined pull request reviews and optimized storage usage. The work established a repeatable pattern for file cleanup, utilizing CSS, HTML, and Django as part of the overall project technology stack.