Florian Fontan enhanced cross-platform compatibility and stability for the ERGO-Code/HiGHS repository by addressing compilation issues in C++ modules. He focused on improving portability between Linux and Windows by adding missing functional includes to HighsGFkSolve.h and HighsNodeQueue.h, resolving build failures that previously hindered developer productivity. Florian also implemented Windows-specific fixes for min and max handling, ensuring consistent behavior across platforms. His work, grounded in C++ development and software engineering best practices, reduced CI validation failures and improved runtime stability. Over the course of the month, Florian’s targeted changes contributed to a more reliable and maintainable codebase for downstream users.