App Architect walks you from a one-line idea to a production-ready prompt — user flow, page map, system design, spec, and tests. Here's why I built it and how it works. The problem with "build me an app" prompts Every developer has done this at least once: you have a vague idea, you open Claude or ChatGPT, you type "build me a habit tracker with social features" , and forty seconds later you're staring at 600 lines of code that compiles but doesn't actually solve the problem you had in your head. The model isn't wrong. Your prompt is. There's a missing layer between "I have an idea" and "here is the code" — the layer where a real engineering team would normally spend a week: user flows, page maps, schemas, edge cases, the boring stuff that decides whether the thing actually ships. I kept skipping that layer. So I built a tool that refuses to let me skip it. What App Architect does App Architect is a Claude artifact that takes you through five structured phases.…