Worked on the libsdl-org/SDL repository to enhance migration safety for C++ projects transitioning to SDL3, focusing on the SDL_ThreadID type. Addressed a subtle edge case by implementing a compile-time guard in C++ to prevent accidental misuse of SDL_ThreadID as a function, while introducing an explicit undefinition in the C source to support legitimate function pointer usage. Updated documentation to clarify this migration pitfall for developers. The work involved C, C++, and API design, and contributed a targeted bug fix that reduces the risk of compile-time errors, supporting a smoother migration path for C++ users of the SDL library.