Developed and delivered a new JSON handling package for the msys2/MINGW-packages repository, enabling seamless interoperability between C++ and Python through pybind11 bindings. The work focused on integrating nlohmann::json with pybind11, allowing native C++ JSON structures to be accessed and manipulated within Python projects. Using CMake and Shell scripting, the developer packaged mingw-w64-pybind11-json, addressed install prefix issues, and refined the package layout for clarity and maintainability. This contribution enhanced cross-language usability and streamlined Python and C++ integration workflows, providing reliable JSON support for C++ projects within the MinGW environment and aligning with ongoing release and packaging standards.