Tang worked on stability and security improvements across the denoland/chromium_build and google/dawn repositories, focusing on build systems and dependency management using Go and Python. In denoland/chromium_build, Tang restored a Windows SDK version compatibility check, reverting a previous change to maintain build stability and prevent regressions after a Windows SDK upgrade. This ensured continued compatibility with legacy environments and reduced CI breakages. In google/dawn, Tang addressed a potential security vulnerability by upgrading the golang.org/x/crypto dependency through automated tooling, maintaining compatibility and traceability. The work demonstrated careful attention to non-functional requirements and robust maintenance of complex build environments.