Over a two-month period, contributed to the vitejs and mui-x repositories by delivering three features focused on documentation clarity and front end consistency. Enhanced the vitejs documentation by clarifying how the mergeConfig function handles null and undefined values, ensuring alignment across core and documentation repositories and improving onboarding for new users. In mui-x, implemented a feature allowing DataGrid icons to inherit font size from the base action button, promoting responsive and consistent UI behavior. Collaborated with other developers, added comprehensive tests, and utilized React, JavaScript, and TypeScript to ensure robust, maintainable solutions without introducing new bugs during this period.