✦   Before you go live

Building with AI? Then you're probably missing this security.

Most security problems in vibe coding aren't hacker attacks. They're accidents. A leaked key, a database anyone can read, an AI endpoint that costs you hundreds of euros. This checklist catches those mistakes before they happen.

Get instant access for €27 →

€27 excl. VAT (€32.67 incl.) · one-off payment · straight into your Academy

Sound familiar?

Three mistakes that cost beginners dearly

Your API key ends up on GitHub. Bots scan public repos within seconds. A leaked OpenAI key can cost thousands of euros before you notice.
Your database is readable by anyone. Supabase doesn't switch on Row Level Security automatically. Without that setting, anyone with your URL can pull up your customer data, straight from the browser.
Someone drains your AI endpoint. No rate limit on your /api/chat? Then a single bot can cost you hundreds of euros in an hour. And you pay the bill.

What you get

12 modules, 56 checkpoints

An interactive checklist you tick off as you work through it. For each point: why it matters, a red flag to look out for, and exactly how to set it up. Tailored to the vibe coder's stack: GitHub, Vercel, Supabase and Stripe.

1
Secrets & API Keys
Never hardcode a key
2
GitHub
Your code storage secured
3
Supabase
Setting up Row Level Security properly
4
Stripe
Prices nobody can tamper with
5
Authentication
Who can go where
6
Forms
Spam, injection and bad input
7
File uploads
Allowing uploads safely
8
AI features
Protecting your bill
9
Vercel
Configuring deployment properly
10
Dependency Check
Finding vulnerable packages
11
Privacy & GDPR
Required for EU users
12
Backups
What to do when things go wrong

Plus the Britt check: three ready-made prompts to have Claude and ChatGPT audit your code before you go live. On average, they catch 80 to 90 percent of beginner mistakes.

Who it's for

Made for builders, not security experts

Instant access

Pay once, access forever

€27

Excl. VAT (€32.67 incl.) · straight into your Studio van Duijn Academy

  • The full interactive checklist (12 modules, 56 points)
  • For each point: why, the red flag and how to set it up
  • The 3 Britt check audit prompts for Claude and ChatGPT
  • Lifetime access, at your own pace
Yes, I want to go live safely →

Secure payment via Stripe · instant access

Frequently asked questions

Good to know

I'm not a techie. Will I understand this?

Yes. Every point is explained in plain language, with exactly where to click. No jargon, just do what it says.

Which tools is this for?

For the stack most vibe coders use: GitHub, Vercel, Supabase and Stripe. If you build with those same building blocks, it fits exactly.

How do I get access?

After your purchase you'll receive an email with a login link. The checklist is then in your Academy, available for life.

Is this a course or a checklist?

An interactive checklist you tick off. No hours of video, just work through it and tick things off before you go live. Doable in an afternoon.