loping extensions. We built several first-class extensions, including <a href=/v1.19/docs/reference/config/proxy_extensions/metadata_exchange/>metadata exchange</a>, <a href=https://archive.istio.io/v1.17/docs/reference/config/proxy_extensions/stats/>Prometheus stats</a>, and <a href=https://archive.istio.io/v1.17/docs/reference/config/proxy_extensions/attributegen/>attribute generation</a>.
In order to share our learning more broadly, we created a <a href=https://github.com/istio-ecosystem/wasm-extensions>