I thought about using it, but since it returns only straight lines in the image it's probably not very useful for curved edges and for node shapes there are pro

I thought about using it, but since it returns only straight lines in the image it's probably not very useful for curved edges and for node shapes there are probably also better ways. For edges the skeleton has been working really well. It might still be useful for detecting whether edges are orthogonal and to better detect bends (right now, orthogonal edges always have a little curve at the corners, due to how skeletonization works).