This is a node program that uses architect and smith in both node.js and the browser.
It serves a simple rpc API over binary websockets using msgpack encoded smith messages.
The rpc API spawns pty sessions on my VPS box running in somewhat sandboxed luvit repls.
To play with the repl, simply go here.
If you want to watch the decoded msgpack messages, append ?debug to the url and open web inspector's console.