Manuel Fuchs developed a secure and reliable file download feature for the heroku/libcnb.rs repository, focusing on enterprise deployment needs. He migrated the HTTP client from ureq to reqwest and integrated rustls-tls-native-roots to leverage the operating system’s TLS certificate store, supporting environments with custom certificate authorities. By enhancing error handling, he ensured that non-success HTTP statuses return a DownloadError, and he added targeted tests for 404 scenarios. Working primarily in Rust, Manuel’s approach improved security, reliability, and compatibility for buildpack downloads, demonstrating careful attention to robust error management and test-driven development within a short, focused engineering period.