Worked on the ignaciosica/tinygrad repository, focusing on enhancing code quality through targeted refactoring efforts. The primary contribution involved updating type checks across five Python modules, replacing multiple OR-based isinstance conditions with tuple-based checks to streamline readability and future maintenance. This approach consolidated logic, reduced cognitive load for contributors, and ensured consistent type validation without altering existing behavior. The work demonstrated strong skills in Python development and code refactoring, emphasizing cross-file code maintenance and commit-driven workflows. No bug fixes were recorded during this period, with all efforts directed toward improving maintainability and scalability through thoughtful, behavior-preserving code improvements.