Comment by the_harpia_io

that mental walk-through is honestly underrated - you didn't just know the code, you had a model in your head of why each piece was there. with AI output you know the spec, maybe reviewed it quickly, but there's no real internalization. usually fine until something breaks and then you're debugging code that's kind of foreign to you. I've started reading the diffs more carefully exactly because of that - takes more time but at least you have something to fall back on when it goes wrong