miniblog.

Test code is total: we require it to always terminate or it's a failure! It also typically has 100% line and branch coverage. I feel way less nervous about refactoring tests, you can always just run them.

... and my third refactoring with Cursor changed some function calls that I didn't want it to modify. Subtle. I've had the most success with AI coding tools when I know exactly what I want the output to look like.

Every time I implement an interpreter with recursion, I regret it. As soon as I want TCO, or userland control of stack limits, or resumable exceptions, I need my own stack. This is awkward because it's an upfront design decision. Changing the stack model is a big refactoring.