The NATS broker lives in its own crate and repository,
[`ruststream-nats`](https://github.com/powersemmi/ruststream-nats). It covers Core NATS subjects,
JetStream durable consumers, request-reply, and an in-memory test broker under its `testing`
feature.
Its full documentation, including installation, subscription options, and testing, is published at
[powersemmi.github.io/ruststream-nats](https://powersemmi.github.io/ruststream-nats/).