β‘ 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.
π‘ 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.
π― Recommended For
Prompt Engineers, AI App Developers, and Productivity Enthusiasts.
π‘Curated & Verified by SungGeun Kim (AI & Web Architecture Expert)
π 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 β plus 8 ready-made templates.