Worked on stability improvements for the ERGO-Code/HiGHS repository by addressing multiple-definition linker errors related to global constants in C++ header files. The approach involved marking all global constants in highs_c_api.h as 'static const', ensuring each constant is localized to its translation unit and preventing conflicts when the header is included across different modules. This change enhanced build reliability and streamlined cross-module integration, reducing build failures and improving the developer experience. The work demonstrated a strong understanding of build systems, C++ header design, and translation-unit semantics, laying the foundation for safer and more maintainable API usage in future development.