[lewisl9029]

Yep I did plan for it.

All messages in the app are sent through channels that support an arbitrary number of recipients. That arbitrary number just happens to be always set to 1 at the moment.

A naive group chat implementation (i.e. an inefficient one where every participant sends each message to every other participant until they receive it) should be very doable, but I decided against implementing it for the release because it'd add quite a bit more complexity and would be rather tedious to test.