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Luke Fryer
Luke Fryer

Posted on • Originally published at aipromptarchitect.co.uk

How to Write System Prompts: The Definitive Guide

Quick Answer

Quick Answer A system prompt is a hidden instruction that defines AI behavior before the conversation starts — the role, rules, expertise, and output format. It's the most impactful part of any AI interaction, yet most people skip it entirely. This guide shows you the 5-part structure used by production AI systems, with copy-paste examples for every major role.


For the complete guide:

Read the full guide on AI Prompt Architect →


AI Prompt Architect — STCO framework. NPM.

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