I spent the morning finalizing ThePlan™ and creating the first dozen test cases. Then I built a way to visualize the diffs I'm about to produce and hooked up a regular text diff (as available in Darke) for comparison. Up next: Fill that fourth box.
(In this jam, I'm exploring what a code-aware diff tool could do for you. Past updates and more info at https://handmade.network/p/366/diffest/, &diffest)