Worked on the lizongying/homebrew-cask repository to deliver an updated Homebrew Cask for Keyguard, focusing on version 1.6.4. The update involved refreshing SHA256 checksums for both ARM and Intel architectures, ensuring that Homebrew users could reliably install the latest Keyguard release without encountering checksum errors. This work required careful attention to cross-architecture packaging and release management, leveraging skills in Homebrew and package management with Ruby as the primary language. The changes improved installation reliability for end users and maintained alignment with upstream Keyguard releases, reflecting a disciplined approach to open-source package maintenance and distribution within the Homebrew ecosystem.