Yes, basically as you guessed. Applications receive input, manage local resources, and produce output. The sidecar proxy is their interface with the world. The

Yes, basically as you guessed. Applications receive input, manage local resources, and produce output. The sidecar proxy is their interface with the world. The proxy handles cross-cutting infrastructure concerns: service discovery, federation, distributed tracing, and so on. Blog posts about Envoy proxy as a sidecar in a service mesh context should offer plenty of examples.