During July 2025, Jeong Hyun Jo focused on enhancing developer experience in the yorkie-team/yorkie repository by delivering a targeted update to the Pub-Sub documentation. He clarified event type descriptions and corrected code links to ensure the documentation accurately reflected the current Go-based Pub-Sub implementation. This work aimed to streamline onboarding for new contributors and reduce potential misconfigurations by improving clarity and traceability. Leveraging his skills in backend development, Go, and Markdown, Jeong Hyun Jo prioritized maintainability and developer support. While no bugs were addressed, his efforts contributed to a more accessible and reliable documentation foundation for the project.