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Channels
BitBot responds to /invites sent to him. If you invite him to a channel with a password (+k channel mode) he will record the key and use it in the future. If you change the key and he sees you doing it, he'll update his records to use the new key in future.
+k channels with no /invite bypass
Some networks do not allow /invited users to bypass channel passwords - thus BitBot can't join without a key and then record the key. There's two things you can do to fix this.
/msg <bot> config channel:#channel key
or
/msg <bot> raw JOIN #channel :key here
After using either of these to get BitBot initially in to a channel, he will go about recording and updating the channel's key as described above.
Disabling join-on-invite
/msg <bot> config server accept-invites off
Perform commands on join
From the channel you wish him to perform commands for, do:
!cperform add PRIVMSG {CHAN} :hello, I'm {NICK}