Worked on the fmtlib/fmt repository to enhance stability and compatibility for C++20 module usage. Addressed a specific bug by explicitly qualifying std::fprintf in the codebase, resolving ambiguity in fprintf calls that previously led to cross-build failures and inconsistent behavior across compilers. This targeted fix improved reliability in module-enabled configurations and reduced compile-time errors, contributing to more dependable CI outcomes and smoother release processes. The work demonstrated disciplined C++ development practices, with a focus on error handling and module compatibility. Leveraged expertise in C++ and standard library integration to ensure maintainable, cross-platform support for modern C++ standards.