Worked on improving repository hygiene for the aiohttp project by delivering a configuration update that excluded generated WebSocket mask and reader C files from version control. This change involved updating the .gitignore file using Git to ensure that only relevant source files are tracked, thereby reducing repository noise and preventing accidental commits of temporary or generated files. The approach focused on maintaining a cleaner codebase and improving the clarity of pull requests and continuous integration processes. Utilized skills in configuration management and version control, with direct work in C and Gitattributes, to streamline the development workflow and enhance overall repository quality.