eg method length, file length.
Awesome task, by the way, thanks for putting it together. The colors and bar graphs are a great touch.
Good idea. Were you thinking more of a simple LoC count, or something more complicated?
Just checks against the complexity.sloc.physical or complexity.sloc.logical numbers that complexity-report gives back.
Checking against a per-file max and a per-function max should be similar to what is already being done, those numbers are already there to play with.