Is there code (in master?) that I can look at to find out how to ask for this information?
(If it's not in master or hasn't been finished yet, who is currently working on this functionality?)
The userlist is clearly the plugin responsible for keeping track of users currently in the channel.
How do I ask it for everyone/what sort of message does it emit when it observes a new user?
The userlist periodically sends out a userlist_message, which has list of everyone it knows about. If you want to request one be sent now, you can send a userlist_request.
Is there code (in master?) that I can look at to find out how to ask for this information? (If it's not in master or hasn't been finished yet, who is currently working on this functionality?)
The userlist is clearly the plugin responsible for keeping track of users currently in the channel. How do I ask it for everyone/what sort of message does it emit when it observes a new user?