Worked on improving the robustness and monitoring reliability of the envoyproxy/envoy project by addressing an issue with Locality Zone Statistics Default Handling. Focused on software development and unit testing in C++, implemented a bug fix to ensure that when the locality zone is not set, a default empty StatName is returned, preventing the creation of invalid metric names. Added targeted tests to lock in the correct behavior and aligned the codebase with upstream changes by dropping statistics from clusters missing zone information. These efforts reduced downstream errors and dashboard noise, demonstrating a methodical approach to code quality and upstream collaboration.