Yeah, using 'summon' works, it just kind of slips our minds that it exists when we're thinking/talking about the code, but that's likely just a familiarity issue. Mostly it's just the use-case of being able to casually see what a teammate is working on at a glance instead of asking distracting questions, but it's not a huge deal.
Thanks for the support! I've been working on a collaborative editing solution of my own for a while (though not for code), and can definitely appreciate the work that goes in to such a thing.