Stated aim was to maximise determinism. That sounds like a good point for any vibing effort. Also ties in with my general sentiment [[The arc of vibe coding bends towards determinism 20260214145739]]
test driven development. Markdown plan first, then function tests for feature definitions, only then making the functions. Reviewed all code himself.
Also makes me wonder about building my own libraries from vibed results. (e.g. the forms I use, the css, the diff functions, although most of the interactive stuff I've written myself already, and use them as components)