During March 2025, Andre Caldas enhanced code hygiene in the gismo/gismo repository by implementing explicit namespace management in C++. He removed a 'using namespace gismo;' directive from a header file, ensuring that the gismo namespace is no longer implicitly exposed to all dependent files. This targeted feature required careful software design to maintain compatibility while reducing the risk of naming conflicts. By enforcing explicit namespace qualification, Andre improved code organization and promoted safer API usage. His work demonstrated a focused application of C++ and namespace management skills, addressing a subtle but important aspect of maintainable and robust software architecture.