What You'll Learn
Most vibe coding tutorials show you the wins. This one shows you the losses — and how to avoid them.
Every mistake here comes from real projects. We've made all of them. The goal isn't to scare you — it's to save you hours of frustration by learning from other people's pain.
Mistake 1: One Giant Prompt for Everything
You open your tool, type 800 words describing your entire app, and hit send. The AI produces a mess. Half the features are broken, the other half are missing.
This happens because AI tools handle complexity poorly in a single pass. They optimize for completing the request, not for getting every detail right. The more you ask for, the more corners get cut.
How to fix it: One prompt, one feature. Build the layout first. Then add auth. Then the dashboard. Then the settings page. Each prompt builds on the last, and each result is testable on its own.
Warning: If your prompt is longer than a short paragraph, it's probably trying to do too much. Split it up.
Mistake 2: Not Testing Before Adding Features
You get the homepage working, then immediately prompt for the next feature without checking if the homepage actually works. Three features later, something is broken and you have no idea which prompt caused it.
How to fix it: After every single prompt, test the result. Click every button. Fill every form. Try to break it. Only move on when you're confident it works.
Try this: Keep a browser tab open next to your tool. After each prompt, refresh and test for 60 seconds before writing the next one.
Mistake 3: Ignoring Security
This one's serious. A Stanford study found that 45% of AI-generated code contains at least one security vulnerability. Your app might "work" while silently exposing user data to anyone who opens their browser's dev tools.
The AI optimizes for "does it run" — not "is it safe." It will happily put API keys in frontend code, skip authentication checks, and leave database tables wide open.
How to fix it: Run a security check before you ship anything. Use our Security Checklist or the Security Checker tool. This is not optional.
Warning: If your app handles user data, payments, or personal information, security isn't a nice-to-have. A single exposed API key can cost you thousands of dollars.
Mistake 4: Running Out of Credits Mid-Build
You're 70% done with your app, momentum is high, and suddenly: "You've reached your usage limit." Now you're stuck waiting for a reset or paying for an upgrade at the worst possible time.
This happens because vibe coding uses way more credits than people expect. Each prompt, each iteration, each "make it a little different" — they all add up fast.
How to fix it: Check your credit balance before starting a build session. Plan your prompts in advance so you don't waste credits on vague requests. Use our Credits Calculator to estimate what your project will cost before you start.
Mistake 5: Not Saving or Exporting Code
You build something amazing in a browser-based tool. Then you accidentally close the tab, or the tool has an outage, or you hit undo too many times. Your work is gone.
How to fix it: Export or commit your code after every major milestone. If you're using Cursor, push to GitHub after each working feature. If you're using Lovable or Bolt, download the code regularly.
Pro tip: Set up a simple GitHub repo before you start building. Even if you don't know Git, the basics take 10 minutes to learn. Our GitHub guide for vibe coders walks you through it.
Mistake 6: Skipping the MVP
You want to build "Uber for dog walkers" with real-time tracking, payment processing, ratings, chat, push notifications, and an admin panel. So you try to build all of it at once.
Two weeks later you have a half-working app that nobody wants. You built features before validating that anyone cares about the core idea.
How to fix it: Your first version should have 3 features. Maximum. Build the absolute minimum that lets someone use your product and tell you if it's worth continuing.
Try this: Write down every feature you want. Circle the 3 that matter most. Build only those. Everything else goes on a "later" list.
Mistake 7: Trusting the AI Blindly
The AI generates code that looks professional, runs without errors, and seems to work. So you ship it. Then users find bugs, data gets corrupted, or worse — security vulnerabilities get exploited.
AI tools are confident, not correct. They'll generate code that passes a quick glance but falls apart under real usage. They don't test edge cases, they don't think about what happens when a user does something unexpected, and they don't care about your data.
How to fix it: Always review what the AI produces. Test with real data. Try to break your own app. If you can't read code, use a second AI to review the first AI's output — paste the code and ask "what's wrong with this?"
Warning: "It works on my screen" is not a deployment strategy. Test with different browsers, different screen sizes, and different user scenarios before you ship.
Your Pre-Build Checklist
Use this before every vibe coding session:
Built by Us
This guide is based on real builds. gptsters.com is built with vibe coding — see for yourself.