This is an IRC bot for checking that important things are operating correctly (websites are up, bots are online, released tarballs are correct, etc.). It can be addressed by its full name ('undersightable6').
You can find some extra examples in tests: undersightable.t
There is only one command
check (although the bot will accept other reasonable alternatives like
<AlexDaniel> undersightable6: check
<undersightable6> AlexDaniel, OK! Working on it…
<undersightable6> AlexDaniel, 0 errors, 8 warnings: https://gist.github.com/6abf1cbf1f77a6ec617f3303a34ea410