How to Write a System Prompt That Actually Holds
Learn the structure of a strong system prompt, how to set role, rules and format, and how to test it so your assistant or bot behaves consistently.
A system prompt is a set of standing instructions that frames every conversation: who the assistant is, what it should do, and how it should answer. Developers set it through an API. In consumer apps you meet the same idea as custom instructions, projects, custom GPTs, Gems or similar features. A good one makes behavior steady. A bad one is vague and contradictory.
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