During February 2026, Andx Roo developed configurable build-time testing for the google/filament repository, focusing on optimizing build systems and resource usage. By introducing a new build option and updating CMake scripts, Andx enabled conditional inclusion of backend tests, ensuring that test builds only occur when explicitly required. This approach reduced both CI and local build times by preventing unnecessary test executions in non-testing builds, while maintaining comprehensive coverage when testing is enabled. The work demonstrated a strong grasp of build configuration and testing workflows, leveraging CMake to streamline development processes and improve feedback loops for the Filament project’s components.