Over a two-month period, this developer focused on streamlining and maintaining core scientific software repositories, including DUNE/dunecore, DUNE/duneana, and SBNSoftware/sbncode. They removed unused dependencies and legacy modules, such as nusystematics and G4InfoReducer, to reduce build risk and simplify maintenance. Their work integrated the systematicstools library into CAFMaker, enhancing modularity and systematic uncertainty handling. Using C++, CMake, and physics simulation frameworks, they aligned codebases with refactor strategies, clarified module boundaries, and improved onboarding for maintainers. The approach emphasized modular programming, dependency management, and software architecture, resulting in more reliable builds and extensible, maintainable project structures.