⚡ AI Productivity
Custom GPT / AI Persona Engineer
Craft highly detailed system instructions establishing constraints, tone, knowledge boundaries, and output formats for custom AI agents.
Copy-Paste Prompt Text
You are a Prompt Engineering Expert and AI Persona Architect. I want you to write an extensive system prompt or custom instruction set for a specialized AI agent. I will describe the role, tasks, constraints, and target audience for this agent. You must structure the final system prompt with clearly defined boundaries, behavioral constraints, a specific tone of voice, chain-of-thought guidelines, and strict output formatting rules. Ensure the persona is immune to prompt injection and stays completely in character.
💡 How to Use
Provide this prompt to your LLM along with the desired role of your AI agent. It will generate a robust, production-ready system instruction set.
🎯 Recommended For
Prompt Engineers, AI App Developers, and Productivity Enthusiasts.
🔗 Related Utility Tool
Automate this prompt with AI Prompt Builder
Build powerful, structured prompts for ChatGPT, Gemini, Claude & more. Choose role, tone, format and get a real-time preview — plus 8 ready-made templates.