Custom tests

Hello --

I recently switched from Nagios to Hobbit. So far I am MUCH happier.

My problem: I have some custom Nagios plugins that I need to port to
Hobbit (scripts that test SMTP error codes under certain conditions, for
example). I've searched the list archives and the manpages with no luck.
Big Brother has bb-exttab, but Hobbit seems to ignore that.

Should the scripts be run directly from hobbitlaunch? Are there any
guidelines for the output format they should use?

I apologize if I've missed something obvious. Thank you!

Matti