You need to install the following tools to build locally:

• The protoc compiler.
• The compiler plugins. These are pinned in the tool directive of go.mod, so the simplest way to install all of them at their pinned versions is (Go 1.24+):

$ go install tool

Or install them individually:

$ go install google.golang.org/protobuf/cmd/protoc-gen-go@latest
$ go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest
$ go install github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-grpc-gateway@latest
$ go install github.com/google/gnostic/cmd/protoc-gen-openapi@latest

OpenAPI generation uses gnostic's protoc-gen-openapi (OpenAPI v3), not grpc-gateway's protoc-gen-openapiv2 (Swagger 2.0).

• The buf tool.

Then run:

$ buf format -w && buf dep update && buf generate

CI build auto-updates the jennah-sdk-go repo.