During December 2025, Joseph Gershgorin developed Windows ARM64 build support for the libretro/RetroArch repository, expanding the emulator’s compatibility to ARM-based Windows systems. He introduced a dedicated build script and GitHub Actions workflow, leveraging C, C++, and YAML to automate compilation and streamline execution on the new platform. This work reduced manual build steps and aligned the project’s CI/CD pipeline for future ARM64 optimizations. By integrating build-related fixes and collaborating on the implementation, Joseph strengthened the project’s build automation and platform coverage. The depth of the contribution lies in enabling broader device support while improving maintainability for ongoing development.