The shocking part of this story is not that you could vibe code a note taking app in a week, it's the idea that it would cost $300 in LLM agent fees!<p>That's too much and speaks poorly of both the tool he chose and the vibe approach. A more experienced programmer wouldn't have used $300 worth of credits building this.
It's interesting what you can build now without looking under the hood. But if he wants to continue using the app, he's about to find out that there's more to software that just coding a prototype.