@bkuhn I just did an abstraction and filtration pass on a medium-sized application framework (~30K LOC), and as an expert on the code I think it did a good job:
https://claude.ai/share/071ccb69-5d22-4673-905a-362d9663e7d0
It missed a few things (e.g. relay specs). Then again, I have no idea how this kind of review is supposed to work. I didn't go down to the function or statement level -- that'd probably be much noisier.
Maybe chardet 2 and 7 would be a better test of the technique?