Over a two-month period, Fexner focused on improving build reliability and downstream integration for large C++ robotics projects. In ros2/rviz, Fexner addressed missing dependency exports in the rviz_default_plugins CMake configuration, ensuring that dependent packages could correctly locate required libraries after build and export. The solution involved precise build system configuration using CMake and ament, directly reducing downstream library resolution failures. In moveit/moveit2, Fexner resolved a concurrency issue by including the necessary <mutex> header for std::scoped_lock in BackgroundProcessing.cpp, which improved thread safety and compilation stability. The work demonstrated careful attention to build systems and C++ concurrency.