Comment by def-lkb

The output is a bit underwhelming. You might be interested in https://codinuum.github.io/gallery-cca/ It is not based on tree sitter , the parsers they use are quite impressive. Yet a difficult part is computing large tree diff (it is O(n^3) if I remember well), the authors devise heuristics that are efficient in practice and should be adaptable to tree sitter.