> A much more common problem is if someone deploys another bot, which will lead your bot into having an endless back-and-forth with it.

This I'd understand, bit trickier since you're basically end up with a problem typical of distributed systems.

But one bot? One identity? One GitHub user? Seems really strange to miss something like that, as you say, it's one of the earlier things you tend to try when creating bots for chats and alike.