Yunhao contributed to two repositories over a two-month period, focusing on automation and documentation. In lizongying/homebrew-cask, Yunhao enabled automatic updates for the ExpressVPN Homebrew Cask, reducing manual maintenance and aligning the package with Homebrew’s auto-update standards using Ruby and Git-based workflows. In cse210-fa24-group4/cse210-fa24-group4, Yunhao introduced a reusable Architecture Decision Records template written in Markdown, establishing a consistent process for documenting architectural decisions. This work improved onboarding and maintainability by providing clear context and traceability for future contributors. Across both projects, Yunhao demonstrated depth in DevOps, package management, and technical writing practices.