Pretty simple:

$ cd examples
$ racket cad-examples.rkt

It's pretty simple, it just shows how various kinds of descriptors can be content-addressed in a consistent way.

You'll need to launch the Tor daemon for Goblins. It's mildly annoying to set up at the time of writing, but the instructions are on the Goblins CapTP documentation page.

Okay, done? Then open two terminals. In the first one:

$ cd examples
$ racket rich-interface-server.rkt

That'll print out two "sturdyrefs", one for the parrot, one for the describe incanter, that you want to paste to rich-interface-client.rkt.¹ But actually, the last line it spits out is just the whole command you want to copy-paste to run the entirety of that command for your convenience.

Anyway, once you do so it'll do a few things:

• Fetch and print the structured representation of the parrot's remote interface
• Print that out in a human-meaningful form
• Invoke the parrot and print out its result

By the way, Goblins with Tor Onion Services is peer to peer so client to server so this is kind of a misnomer. But it's the eaiest way to say "here's the thing that will be connecting, and here's the thing it will connect to" in familiar language I know of.