Well, this works, but it does show some limitations in the code. I'm adding this to my examples/ directory. Thanks for the pointer.
use aliased 'AI::Prolog::Parser';
use aliased 'AI::Prolog::Term';
use aliased 'AI::Prolog::Engine';
my $database = Parser->consult(<<'END_PROLOG');
state(middle, middle, onbox, hasnot),
state(middle, middle, onbox, has)).
state(MP, BP, onfloor, H),
state(MP, BP, onbox, H)).
state(P1, P1, onfloor, H),
state(P2, P2, onfloor, H)).
state(P1, BP, onfloor, H),
state(P2, BP, onfloor, H)).
/* getfood(state(_,_,_,has)). */
/* I'll have to fix this soonish! */
getfood(S1) :- perform(Act, S1, S2),
nl, print(S1), print(Act),
my $parser = Parser->new("getfood(state(atdoor,atwindow,onfloor,hasnot
my $query = Term->new($parser);
my $engine = Engine->new($query,$database);
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