I really like this idea and have been experimenting with it over a week or so.

I think there’s an opportunity to use an AST diff system for code forges where you don’t present the user with line diffs in the UI — or at least not as the first diff the user sees.

I firmly believe code review should happen in your editor.

Really glad you've been using it, and yeah that's exactly the direction I've been thinking about. The line diff as the default view in code forges has always felt like an accident of history it definitely was easy to compute, but not what's actually useful for understanding what changed.