Worked on core C++ infrastructure for the flashinfer-ai/flashinfer and ROCm/flash-attention repositories, focusing on stability and standards compliance in template-heavy GPU programming environments. Addressed critical bugs by refining template specialization syntax after member access operators and resolving clang parser errors through correct use of the 'typename' keyword. These changes reduced build and runtime errors, improved cross-compiler compatibility, and enhanced code maintainability. Leveraged C++, CUDA, and advanced template metaprogramming to ensure reliable builds and smoother downstream integration. Prioritized correctness and repository stability, enabling future feature development and easier onboarding for contributors working with complex C++ and GPU codebases.