Worked on streamlining CI workflows and enhancing terminal output reliability across two open source repositories. In semgrep/semgrep-rules, simplified the GitHub Actions pipeline by removing an unused changed-files action, reducing maintenance overhead while preserving test coverage against historical Semgrep versions. For Netflix/metaflow, implemented FORCE_COLOR support by patching isatty() logic, enabling consistent color output in terminal applications regardless of environment. This update included comprehensive unit tests and ensured compatibility with vendored dependencies. Leveraged Python, YAML, and CI/CD best practices throughout, focusing on maintainability, environment variable management, and robust testing to deliver targeted improvements without introducing regression risk.