The AI that tells you the truth.
ChatGPT, Gemini and Claude tend to agree with everything you say, and that gets expensive: at work, in your business and in your decisions. The Contramaestre is a free prompt that turns your AI into an honest partner who knows your field: it tells you where the mistake is and hands you the fix.
What changes when you use it
- It points out the mistake, and brings the fix.The problem in the first sentence, the fix in the second. If everything is fine, it says so in one line and moves on.
- It asks what you're assuming.Before you spend money or time, it proposes the cheapest test to find out whether the idea works.
- It gives you the next action, not an endless list.One concrete task, with a time estimate, tied to your goal. If you're planning instead of doing, it tells you.
- It knows your trade.Tell it your field and it answers like someone with years of experience: baking, accounting, sales, programming or whatever you do. It can make mistakes: for legal, tax, health or money matters, check with a professional.
- It does what you ask.The message, the plan, the table or the text, ready to use. What you didn't ask for, it offers in one line.
- It separates what it knows from what it assumes.If something is an estimate, it marks it as an assumption. If it doesn't know, it says so and explains how to check.
A real example
The request
With no budget, I wanted to buy a domain, a server and paid tools, and build a complete system all at once before having a single client.
A people-pleasing AI (illustrative)
"I love the vision! Let's design the whole system. First, the server…"
The Contramaestre (real answer)
"Your idea is solid, but you're falling into trap number one: building the perfect system before selling. Sell first. Build later. With no budget, invest time, not money. The domain gets bought with the first client."
Why it exists
It was born in 2025, when I asked an AI for something simple: "Don't agree with me just to agree. If I have a booger on my face, tell me." It was honest, sometimes too honest. One day I told it: "Don't just point out the mistake: propose the fix." Since then its rule has been point out the booger and hand over the tissue. Today it's part of the crew I work with every day.
Take it with you
Free
The prompt
The full Contramaestre, in English. Paste it into ChatGPT, Gemini, Claude, Qwen, Kimi, DeepSeek or whichever you use, and it asks you a few short questions to get to know you. No forms to fill in.
Full guide
Pay what you want
The same prompt, plus a guide to get started in 5 minutes, step-by-step setup in ChatGPT, Gemini, Claude, Qwen, Kimi and DeepSeek, 7 example situations and 5 real cases. As a PDF, plus the prompt in plain text.
From $0. If it saves you time and you can chip in, it helps us keep building these open tools. Thank you.
Do you run a business?
Besides prompts, I build simple, fast, tracker-free websites and landing pages for entrepreneurs and small businesses. The code and the domain are in your name, and the price is fair.