Worked on enhancing error handling in the spring-projects/spring-boot repository, focusing on proxy authentication scenarios. Addressed a bug where HTTP 407 responses from the Docker daemon were not clearly surfaced, implementing a dedicated ProxyAuthException and refining the response parsing logic to treat these errors as plain text. This Java-based backend solution improved diagnostics for users behind HTTP proxies by making error messages more actionable and reducing confusion. The approach emphasized robust error handling and traceability, linking changes to the relevant issue for maintainability. The work contributed to lower support overhead and faster troubleshooting through clearer, more reliable error reporting.