Worked on the Homebrew/homebrew-cask repository, focusing on improving the security and reliability of binary distribution for macOS users. Addressed a critical issue by correcting the SHA256 checksum for the QCAD Intel binary, ensuring that downloaded files are both authentic and untampered. Utilized Ruby and package management expertise to validate and harden the distribution process, reinforcing user trust in Homebrew Cask. The update prevented potential installation of corrupted or malicious binaries, reducing support overhead and enhancing release reliability. This work demonstrated careful attention to security practices and contributed to the overall integrity of the Homebrew software distribution ecosystem.