Document API and IRC tags for replies
Web chat users got access to the new "replies" feature, where you can mark your message to be a reply of another message.
My suggestion is to add official documentation on how third parties can use this feature (for sending messages and for parsing received messages to be a reply)
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Documentation for *receiving* replies exists now https://dev.twitch.tv/docs/irc/tags#privmsg-twitch-tags but I can't seem to find any way of *sending* replies.