How I built a SaaS using Claude’s Fable 5 — Kreation

I lose thoughts. Not in a dramatic way… in the most ordinary way possible. I’ll be walking somewhere and think “wait, that’s actually a good idea,” and by the time I’m anywhere near a keyboard, it’s gone. I’ve tried notebooks. I’ve tried note apps. The capture part isn’t even the problem; the problem is that nothing ever happens to those notes afterward. They just sit there, and going back to a pile of half-sentences feels like homework.

So I built Kreation. The pitch is one line: dump any thought during the day, and once a day… at a time you pick… an AI goes through the whole pile and actually does something with each one. Categorizes it, answers it if it’s a question, gives you one concrete next step if it’s an idea or a task. You don’t organize anything. You just dump.

This article is about how I built it, because the process was almost as interesting as the product.

It started in Notion, not in code

First of all instead of directly submitting prompt to Calude — I created small product spec with Gemini Flash Model — then I submitted that spec to Claude with instructions like — Create PRODUCT_SPEC.md with these information:

• Brief explanation about what this app will do(added context of features that I thought of)