> L'Atelier Prompt — Expert AI Prompt Generator, No Subscription | Claude, ChatGPT, Gemini
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AP
L'Atelier Prompt

Anthropic API Key required

Your key is stored only in your browser — never transmitted.

Exact procedure in order
1. Go to console.anthropic.com → create an account
2. Add a payment method and add a few dollars of credit
3. Go to API Keys → create a new key
4. Copy the key and paste it below
⚠️ Step 2 must come before step 3 — otherwise the key won't work.

Key stored in localStorage · No data transmitted

EN · FR

L'Atelier
Prompt

💬 LLM Prompts ⚡ Claude Code Agents

Your AI at its full potential,
for any LLM or Claude Code project.

LLM mode: Say "Generate a prompt for me to..." — The Workshop crafts the perfect instruction for Claude, ChatGPT, Gemini or Grok.

Claude Code mode: Describe your project — The Workshop generates a structured instruction ready to paste in your terminal.

Four advantages no one else offers

Conversational LLM prompts · Claude Code agents · Expert library

The Workshop doesn't replace your expertise — it amplifies it.

01
Automatic complexity detection
Others make you choose between frameworks you don't know. The Workshop analyzes your brief and picks automatically: CRISP for daily use, TRACE for complex projects, POWER when format is critical.
02
Level 2 Context Engineering
No mainstream generator covers the 6-layer stack for AI agents — memory, RAG, tools, orchestration. The Workshop is the only accessible tool that masters this advanced level.
03
Adaptation per target LLM
A prompt optimized for Claude is not the same as for Gemini or ChatGPT. The Workshop automatically adapts tone, structure and instructions for your target LLM. Competitors generate generic content.
04
Claude Code Agent Mode
New: generate structured instructions for Claude Code CLI — AGENT, ORCHESTRATE, DEPLOY frameworks. With integrated CLAUDE.md rule. For development projects that need more than a chat interface.

How it works

Four steps, less than two minutes

1
Describe your mission or project
LLM mode: Start with "Generate a prompt for me to..."
Claude Code mode: Describe your project, files and technical objective directly.

The Workshop doesn't solve problems directly — it crafts the perfect instruction, whether for dialogue or agent execution.
2
The Workshop picks the framework
Based on detected complexity, it selects CRISP, TRACE, POWER or Level 2 Context Engineering. You don't need to know these methods.
3
Receive the expert instruction
LLM: Prompt structured in 6 components, optimized for your target LLM.
Claude Code: AGENT/ORCHESTRATE/DEPLOY instruction + integrated CLAUDE.md rule.
4
Copy and use
One click on "Copy". Paste into Claude, ChatGPT, Gemini or any other LLM. Professional-level result immediately.

The Workshop vs paid generators

Already subscribed to Claude? You don't need to pay for another tool.

Feature
Paid generators
L'Atelier Prompt
Monthly cost
€10 to €30/month fixed
Pay-per-useno fixed subscription
Auto complexity detection
✗ Not available
✓ Auto (4 frameworks)
Claude Code Agent Mode
✗ Not available
✓ AGENT / ORCHESTRATE / DEPLOY
Agent Context Engineering
✗ Not available
✓ 6-layer stack
Adaptation per target LLM
Partial
✓ 5 adapted LLMs
Customization
Fixed templates
✓ Free context
Mobile install
App store required
✓ PWA — direct Safari

* The Workshop uses the Anthropic API: free key to create, payment method required, pay-per-use billing. Cost varies — generally well below a fixed €10-30/month subscription.

Expert Prompt Library

30 expert prompts ready to use. Copy, customize, unleash your AI.

Real Estate · Marketing · Health · Agroecology · Tech & AI

Ready to forge your first prompt?

API key entered once — saved in your browser.
Opérationnel en 2 minutes.

Active

⚠️ Important — The Workshop doesn't solve your problems directly.
It generates the perfect prompt so Claude, ChatGPT or Gemini can resolve them at full capacity. You give the generated prompt to your AI — it does the work.

Always start your request with one of these phrases:

→ Generate a prompt for me to...
→ Create a prompt that...
→ I need a prompt for...

✓ "Generate a prompt for me to analyze Google Ads data"
✗ "How to analyze Google Ads data" — that's a direct question, not a prompt request.

How to use the generated prompt: Click "Copy", then paste into a new Claude, ChatGPT, Gemini or any other LLM conversation.

API Key: Get one at console.anthropic.com. Important: first add a payment method and a few dollars of credit before generating the key — otherwise it won't work.

Quick examples
Configuration
Your prompt request
💡 Always start with:
→ "Generate a prompt for me to..."
→ "Create a prompt that..."
→ "I need a prompt for..."
The Workshop doesn't solve your problems directly: it crafts the perfect instruction to supercharge your AI.
Already have a prompt to improve? Start with: "Generate a prompt to improve this result: [your prompt]"
Conversational Prompt Forge
The Workshop crafts the best dialogue instruction. Ideal for precise, creative or analytical responses.
0 caractères
Result

Legal notice & Privacy

Effective March 24, 2026

1. Éditeur du site

The website atelier-prompt.fr is published by:

Victor Investissement — SARL
Siège social : Le Chesnay, France
Publication director: Alexandre
Contact : contact@atelier-prompt.fr

2. Hosting

The website is hosted by OVH SAS, 2 rue Kellermann, 59100 Roubaix, France.

3. Intellectual property

The L'Atelier Prompt application, its design, methodology and content are the property of Victor Investissement. Any reproduction, even partial, is prohibited without prior written authorization.

The application uses the Anthropic Claude API. Claude is a registered trademark of Anthropic, PBC.

4. Personal data & GDPR

L'Atelier Prompt is designed with privacy as a founding principle:

In accordance with the General Data Protection Regulation (GDPR — EU 2016/679) and the Data Protection Act, you have the right to access, correct and delete your data. Pour exercer ces droits : contact@atelier-prompt.fr

5. Liability

L'Atelier Prompt is a prompt generation tool. Generated prompts are suggestions. Victor Investissement cannot be held responsible for the use of generated prompts or the results produced by third-party LLMs (Claude, ChatGPT, Gemini, etc.).

Use of the Anthropic API is subject to Anthropic's terms of use available at anthropic.com.

6. Security

Your API key is sensitive data. We recommend:

7. Applicable law

This website is governed by French law. In case of dispute, French courts will have sole jurisdiction.