Luke contributed to the lizongying/homebrew-cask repository by implementing binary integrity verification for KDiff3 version 1.12.0. He updated architecture-specific SHA256 checksums for both ARM and Intel binaries, ensuring Homebrew Cask users download and install only verified application binaries. This work focused on enhancing security and reliability by reducing the risk of tampered binaries and installation failures. Luke applied his expertise in Ruby, Homebrew, and package management, leveraging cryptographic hashing and cross-architecture asset validation. His careful change-tracking and documentation reflected a methodical approach, resulting in improved distribution integrity and aligning release assets with the project’s security and reliability objectives.