sem is a semantic version control tool that works on top of Git. It
parses your code with tree-sitter, extracts every function, class, and
method as an entity, and diffs at the entity level instead of lines.
This means you see "function blahh was modified" instead of "lines x-y
changed."

It works in any Git repo with no setup. It can run as the default
`git diff` tool; see the WWW for setup instructions.