Over a two-month period, contributed to cross-platform development and core bug fixes across open source projects. In napi-rs/napi-rs, implemented Windows x86_64-pc-windows-gnu target support by updating the CLI tool and JavaScript binding templates to conditionally load native modules based on the Windows toolchain, improving compatibility and build reliability. Enhanced CI workflows to better filter Windows builds, streamlining feedback for Windows environments. In macvim-dev/macvim, addressed a critical bug in the Python Vim interface by casting Python results to long long in C, preventing 64-bit integer truncation and adding regression tests to ensure correct numeric handling between Python and Vim.