Worked on enhancing the reliability of WebSocket upgrade handling in the zalando/skipper repository, focusing on backend development and networking using Go. Addressed a bug where WebSocket upgrade requests failed due to case sensitivity in the Connection header by updating the upgrade request logic to perform case-insensitive header value lookups. This change improved interoperability with a broader range of clients. Added a regression test to ensure future changes would not reintroduce the issue. The work was delivered as a targeted, well-tested commit, contributing to the stability of Skipper’s WebSocket support and demonstrating attention to protocol compliance and robust HTTP handling.