Caio Casimiro enhanced observability in the Kong/kong repository by developing Proxy-Wasm metrics support within the Prometheus plugin. He introduced host properties for service and route names, enabling more granular metrics collection and facilitating improved monitoring and troubleshooting. Using Lua and Rust, Caio focused on plugin development to provide detailed system visibility without impacting Prometheus scrape performance. This targeted feature allows teams to perform faster root-cause analysis and gain deeper service-level insights. The work demonstrates a thoughtful approach to reliability and performance, addressing the need for measurable monitoring improvements through careful integration of observability and Wasm technologies.