Using 3 AIs to build one app: each delivered a different product, and the polished mistake was hardest to delete

harleyyyyskr · reddit · 2026-11-11

A developer building a booking page for his sister's pottery studio split the work across three AIs—planning, copywriting, and coding—with one rule from day one: no accounts, since customers are retirees and tourists.

When assembling the pieces: the plan said "no account required," the copy's main button read "create your profile," and the code shipped a full login page with a password strength meter and forgot-password flow. Each output was good in isolation; together they described three different apps. His key observation: obvious mistakes are easy to discard, but a polished one argues back—it took him twenty minutes to delete the nice login page. The real problem is that core decisions live only in his head and one chat history.

He asks the community: do you keep a shared decisions note, when do you feed it to the AI, has anyone gone back to a single tool for consistency, and are there tools that handle this sync automatically?

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Using 3 AIs to build one app: each delivered a different product, and the polished mistake was hardest to delete

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