I was looking at https://github.com/github/semantic https://github.com/github/semantic for providing semantic diffs a while back and I still think it would be a

I was looking at https://github.com/github/semantic https://github.com/github/semantic for providing semantic diffs a while back and I still think it would be a good fit. By looking at the diff between trees, you can ignore a lot of the extra noise like indentations, spaces and other styling changes.