Worked on the Homebrew/brew repository to enhance download error handling, focusing on improving ChecksumMismatchError messaging across various download types such as formula, cask, bottle, and resource. Leveraged Ruby for backend development, implementing early detection of HTML responses to provide users with actionable hints and clearer guidance during failures. The approach consolidated error messaging pathways, ensuring consistent behavior and robust handling of missing or stubbed file paths to prevent SystemCallErrors from surfacing. Emphasized testing and error handling best practices, resulting in more reliable installations and upgrades while reducing support overhead and improving the overall user experience for Homebrew users.