so it's mostly basically SSH over nostr?

That is one of the possible use cases. Essentially, you can access your systems remotely without hassle by using Nostr relays as the communication layer.

so i guess there needs to be an adapter to allow a TTY type app like SSH to batch between CRs and whatnot. yeah, i've been doing a lot of work with NWC lately and the way it solves the inbound routing problem is awesome.

That is going to depend on the implementation. There are currently various MCP servers to do SSH e.g

Smithery - Turn scattered context into skills for AI

Extend your agent's capabilities with Model Context Protocol servers.

You can create a new implementation and distribute it as well so anyone can use it. And yes, it's like magic ✨