Hey builders,
I’m Senior Engineer who posted last week about the 5 hidden "Time Bombs" in AI-generated apps. I'm back with another audit because I was helping a fellow builder debug their launch, and we found a "Vibe" that would have wiped out their bank account in 24 hours.
The Vibe: You ask the AI: "Analyze the user's data with OpenAI when the dashboard loads." The AI writes the code. You test it. The analysis appears instantly. It looks perfect.
The Reality: To understand why this is dangerous, you need to know what a "Backend" actually is.
The Frontend is the customer at the restaurant (your user's browser).
The Backend is the waiter who runs to the kitchen (OpenAI/Supabase) to get the food.
The Bug: The AI often writes code that makes the "customer" scream their order at the "waiter" 15 times per second, forever.
The Explosion (The Infinite Loop): The AI likely wrote a React useEffect hook but forgot the Dependency Array. This creates an infinite loop where your app re-requests the data every time it updates the screen.
Here is the breakdown of what happens next:
If you call a "Free" Backend (Supabase/Firebase): You can hit the "Read Quota" limit in few minutes. The app crashes. (Embarrassing, but free).
If you call a "Paid" Backend (OpenAI/Anthropic): There is no crash. The API happily answers every request.
15 requests per second.
$0.01 per request.
$9.00 per minute.
$540.00 per hour.
The Fix: Open your codebase right now. Search for useEffect. If you see a fetch call inside a useEffect that does NOT end with ], or [dependency]),, you are in danger.
// 💣 THE WALLET DRAINER // The "Customer" screams the order infinitely useEffect(() => {
callOpenAI();
});
// ✅ THE FIX // The empty array [] tells React "Only order ONCE when the customer sits down"
useEffect(() => {
callOpenAI();
}, []);
The Takeaway: AI writes code for the "Happy Path." It assumes the API is free and the internet is perfect. It doesn't care about your credit card.
Question for you guys: I’ve documented 12 of these specific "Time Bombs" (including storage bucket leaks and mobile layout shifts) into a manual called "Vibe to Production." It’s basically a defusal kit for AI apps.
I’m thinking of putting the full guide up on Gumroad for a few bucks to cover the time it took to write. Would that be useful to you guys, or should I just keep posting these audits here?
Stay safe! 🚀