During April 2026, this developer contributed to the Homebrew/homebrew-core repository by creating a new formula for the ERFA library, a key component for scientific and astronomical applications. The work involved implementing automated installation and testing procedures, ensuring that the formula could be reliably integrated into the standard Homebrew workflow. By focusing on reproducible builds and streamlined package management, the developer reduced integration complexity for downstream users who depend on precise numerical routines. The project leveraged C programming skills alongside expertise in build systems and package management, resulting in a maintainable solution that enhances reliability for users installing scientific libraries via Homebrew.