Contributed to the macvim-dev/macvim repository by enabling Vim to run on classic AmigaOS 3.x systems, delivering the first modern build for this platform since 1998. Developed a dedicated AmigaOS 3.x build target and implemented compatibility shims in C, addressing system-specific requirements such as safe_Lock handling and gethostname workarounds. Integrated cross-compilation support using the bebbo toolchain and libnix, optimizing the binary for the 68k architecture. Automated testing on FS-UAE Workbench 3.1 verified functionality with 23 passing tests. This work expanded cross-platform coverage and preserved legacy support, demonstrating expertise in C programming and system-level development.