Worked on stability and security improvements across denoland/chromium_build and google/dawn repositories, focusing on build systems and dependency management. Addressed a compatibility issue in denoland/chromium_build by restoring a Windows SDK version check, ensuring continued support for legacy environments and preventing build failures after a recent SDK upgrade. In google/dawn, implemented a security patch by upgrading the golang.org/x/crypto dependency using automated tooling, mitigating a potential vulnerability without introducing new features or breaking compatibility. Leveraged Go and Python to maintain robust build pipelines and manage dependencies, emphasizing traceability and risk reduction through clear commit histories and automated processes.