- docs/consumer-guide.md: downstream consumer guide pointing at todoapp
  as the reference implementation; covers proto authoring, codegen,
  wiring, TS client, and the wire-format / derived-data contracts.
- example/app/order/v1: worked CommandEvaluator example
  (order_evaluators.go + test) demonstrating the three return paths.
- CLAUDE.md: clarify binary protobuf is the default wire format
  everywhere, with JSON as a dev-only opt-in.