During two months of focused engineering, Vebruni improved build reliability and integration across the Trilinos and Spack repositories. In trilinos/Trilinos, Vebruni addressed a macro conflict between Amesos2 and SuperLU by refining C++ build system logic, ensuring stable cross-library integration and reducing downstream build failures. Later, in spack/spack and spack/spack-packages, Vebruni enhanced CI/CD workflows by correcting Ninja build artifact detection and fixing git sparse path handling, using CMake, Git, and Python to improve build correctness and test coverage. The work demonstrated careful attention to detail in resolving nuanced build and integration issues, contributing to more robust developer workflows.