[pas]

I tried it. It .. does nothing. Maybe there are/were reference implementations for the protocol extensions too?

[floatboth]

What do you mean by "nothing"? Weston includes a usable desktop shell by default. Without virtual desktops, but with a panel.

[pas]

Case in point, there was no exit. I had to switch linux terminals and kill the process, because even though I was able to launch the terminal (let's say xterm), but I had no idea how to stop the weston session.

[floatboth]

Looks like it's Ctrl-Alt-Backspace. I personally never use exit features though, I always switch to the terminal I launched the session from and press Ctrl-C.