This protobuf compiler plugin is from google.golang.org/protobuf module, which is recommended by upstream.

Compared to the old plugin provided by github.com/golang/protobuf module, in protoc-gen-go-1-3 or protoc-gen-go-1-5 package, it doesn't support generating gRPC service definitions.

For APIv2, see https://go.dev/blog/protobuf-apiv2.