Worked on enhancing the Homebrew/brew repository by implementing reliable resumable downloads with partial cache preservation. Focused on backend development using Ruby, the solution improved the RetryableDownload component to maintain partial downloads during network errors, allowing installations to resume seamlessly with the --continue-at option. The approach involved refining error handling and network programming logic to ensure only known-bad files were cleared from the cache, preventing unnecessary loss of in-progress downloads. By maintaining partial .incomplete files and integrating checksum validation for self-healing, the work addressed reliability issues on unstable networks and supported large bottle installations without redundant data loss.