https://github.com/ehrlich-b/wingthing - Here's my version of this idea which is agent agnostic. Not exactly the same idea, "sandbox'ed persistent agent", in my case available over the web with xterm.js (though you can also just run locally).
This looks very cool! My concern is just that it's a lot of things bundled in one and I kind of have to trust you for all of them. I would prefer something that puts together a stack of better known components, like a docker compose of agent-sandbox and tailscale or something equivalent, etc ... ideally with each of those swappable.
Looks cool! What's a roost? Is that just a name for the server to go with the whole egg analogy some technology that I haven't heard of before?