gRPC in Java used to mean proto files, code gen, build plugins, server wiring, client channels. A lot of busywork before "hello world." Spring Boot 4.1 fixes most of it. If you can build a REST app, you already know the moves: → define the contract → drop in a @GrpcService bean → inject a stub on the client Full server, client, and in-memory test, from scratch 👇 github.com/danvega/hello-grp…