New ask Hacker News story: Codex's precision and attention to detail is *crazy* when set up correctly

Codex's precision and attention to detail is *crazy* when set up correctly
3 by ditchfieldcaleb | 2 comments on Hacker News.
Lately I've been working on a Tower Defense game with Codex, in part to learn how game development works and in part to see how far I can get using just Codex, no manual coding at all. I've got my AGENTS md & my CODESTYLE md & six other ALLCAPS md files etc, and am working on some refactoring to keep the codebase clean & file sizes low, etc. And then I see this in the ExecPlan for my latest refactor: --- # Observations - Observation: The refactor made the screenshots pixel-identical after the baseline was recaptured correctly. Evidence: sha256sum screenshots/before-implementation-x.png screenshots/after-implementation-x.png reported matching hashes for before/after pairs 1, 2, and 3. --- Which is crazy! I've never told Codex to do an sha compare on before/after screenshots of the app, but I do have instructions in my PLANS.md to take before & after screenshots of the webapp for the game to make sure we avoid frontend regressions (it uses GPT-Image-2 for analysis). So for non-frontend impacting changes, of course nothing should be different between screenshots taken at identical timestamps into the game start. But doing an explicit SHA compare - that's just...not something I would've ever thought of. Wild.

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