During May 2026, contributed two major features to the rust-lang/rust repository, focusing on enhancing test stability and streamlining the development workflow. Leveraging Rust, YAML, and CI/CD practices, restructured the test suite into feature-based subdirectories and introduced regression tests to ensure ongoing reliability of bug fixes, thereby reducing the risk of regressions and improving release quality. Additionally, implemented configuration files and templates for code formatting, issue reporting, and GitHub Actions workflows, which improved code quality and simplified contributor onboarding. These efforts collectively strengthened test coverage, maintainability, and the overall developer experience, with no high-severity bugs addressed during this period.