Jay contributed to the cmu-db/bustub repository by focusing on improving documentation quality, specifically targeting the HyperLogLog component. During this period, Jay identified and corrected a documentation typo in the HyperLogLog.GetCardinality method, changing 'Ddds' to 'Adds' in the C++ header file to enhance clarity and reduce potential confusion for future contributors. This targeted fix supported better onboarding and integration for developers working with the codebase. Jay’s work emphasized documentation accuracy and codebase hygiene, leveraging skills in C++ and technical writing. The contribution was delivered as a focused, reviewed commit, demonstrating attention to detail and commitment to maintainable documentation.