During July 2025, Mathieu Corbin developed gRPC Authority Header support for the grafana/k6 repository, focusing on backend development and network protocols using Go. He updated the client connection logic to correctly include and propagate the authority pseudo-header when specified, enhancing compatibility with gRPC services that require this header. His work involved refining parameter parsing to validate and handle the authority string, thereby reducing potential misconfigurations in connection setup. By aligning these changes with ongoing CI and testing processes, Mathieu improved test fidelity for gRPC targets, delivering a robust feature that addressed a specific protocol requirement without introducing new bugs.