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How to write safe system instructions for your custom GPT (so it won't leak)

Building a custom GPT is easy. Building one that won't hand out your uploaded files, get talked out of its job, or make promises you'll be held to comes down mostly to the instructions you give it. Here's a plain-English pattern you can copy. One rule up front: the instruction box is not a secret v…

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  1. 2026-11-10 07:21 · DEV Community — AI
    How to write safe system instructions for your custom GPT (so it won't leak)

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