Générateur de Prompts Système et Instructions Personnalisées
Créez des invites système de pointe, des règles Cursor et des instructions personnalisées pour ChatGPT et Claude.
Générateur de Prompt Système & Instructions Personnalisées
Créez des prompts système professionnels pour ChatGPT, Claude et API avec rôle, ton et limites strictes.
[ROLE] You are an elite Principal Software Engineer and System Architect. You prioritize clean code, idiomatic modern standards, security, strict typing, and high-performance algorithms. [COMMUNICATION STYLE] Be extremely concise. Get directly to the answer without introductory pleasantries, conversational filler, or meta-commentary. [HOW YOU SHOULD RESPOND] • Always use clean GitHub Flavored Markdown (headers, bulleted lists, inline code backticks, tables). • Do not say "Sure!", "Here is your code", or "I hope this helps". Output only the requested solution. • Never provide incomplete snippets with placeholder comments like "// do something here". Provide complete, runnable code. [RULES & CONSTRAINTS] • If a fact, API parameter, or library does not exist or you are uncertain, explicitly state so instead of guessing. • Never apologize for mistakes or limitations. Simply acknowledge the correction and supply the updated answer immediately.
- ChatGPT : Collez dans Paramètres > Instructions personnalisées.
- API : Transmettez dans le message système "system".
Présentation
Générateur gratuit de prompts système et instructions personnalisées pour ChatGPT, Claude et Cursor.
System Prompt & Custom Instructions Generator Guide
System prompts and custom instructions are the foundational directives that dictate how LLMs behave, reason, and structure their answers.
By framing identity, audience tone, constraints, and negative examples upfront, you minimize hallucinations and avoid repetitive prompt phrasing.
This tool compiles ready-to-use system directives for ChatGPT, Claude 3.5, OpenAI API, and Cursor .cursorrules files.
How to Build an Elite System Prompt
Rapide & IntuitifSelect Target & Persona
Choose ChatGPT, Claude, API, or Cursor and define the model persona.
Configure Tone & Formatting
Set tone preferences, response length limits, and structured format guidelines.
Apply Guardrails & Copy
Activate anti-hallucination constraints and copy your production-ready system prompt.
Points Forts & Avantages Clés
Zéro transfert vers des serveurs distants. Données protégées sur votre appareil.
Résultats immédiats sans files d’attente ni délais réseau.
Aucun compte, aucun abonnement et aucun frais caché.
Optimisé pour smartphones, tablettes et ordinateurs de bureau.
Traitement sécurisé conforme aux standards W3C avec accélération matérielle.
- Explicitly instructing the model to show intermediate reasoning steps improves code and mathematical accuracy.
- Use XML tags like <rules> and <output_format> when targeting Claude 3.5 models.
Foire Aux Questions
2 Questions & RéponsesWhat is the difference between system and user prompts?
System prompts establish persistent identity and meta-rules; user prompts provide specific tasks for a single turn.
How do I use this in Cursor?
Create a .cursorrules file in the root of your repository and paste the generated instructions.

