r132 adds basic Plumber support. Besides blacklisting "attack", each Plumber skill should also now contain the proper results for its current tier, which should also be set correctly in BatBrain. I'm just starting my first run so this is mostly untested. I am aware of two problems already:
1) I had to guess what the possible costume names were for the costume property when setting the tier. If any of my guesses were wrong, you won't be able to reach tier 3 according to BatBrain.
b) Happenings tracking is wrong because mafia defaults to the Passive version of the skill when to_skill()-ing the message from the session log. This also confuses/renders useless the "submit previous fight again" macro button in BatMan RE.
The first is easily enough fixed if someone tells me what the canonical values are, or I figure them all out myself eventually (EDIT: Just got a costume; looks like they're all stat names? Convenient). The latter is less easily fixed and would probably require a feature request -- either to use this sort of name in the session logs, or adding a version of to_skill() to ASH where you can specify a preference for lower-number matches.