Worked on the fastly/Viceroy repository to implement initial support for HTTP 103 Early Hints responses, focusing on backend development using Rust. The approach involved adding basic handling for Early Hints, integrating logging to improve observability, and expanding the test suite to validate 103 response behavior and compatibility. Enhanced test coverage addressed related issues and ensured maintainability, while dependency management practices supported robust testing workflows. These efforts established a foundation for future performance optimizations by enabling Early Hints flow, which can improve client-side latency and resource loading. The work demonstrated depth in HTTP protocol handling and systematic testing methodology.