explaingit

linexjlin/gpts

★ 31,992Audience · vibe coderComplexity · 1/5StaleSetup · easy

TLDR

A public collection of system prompts extracted from popular custom GPTs, showing how hundreds of specialized AI assistants are actually instructed to behave.

Mindmap

mindmap
  root((repo))
    What it does
      Leaked GPT prompts
      Hundreds of examples
      Transparency tool
    Content types
      Coding assistants
      Roleplay characters
      Creative writing
      Language tutors
    Use cases
      Understand GPT behavior
      Prompt engineering learn
      Build your own GPT
      Find inspiration
    Format
      Markdown files
      Named by GPT
      Plain text storage

Things people build with this

USE CASE 1

Understand how a popular custom GPT like Grimoire or Math Mentor actually works by reading its hidden system prompt.

USE CASE 2

Get inspiration and reference patterns when designing your own custom GPT instructions.

USE CASE 3

Learn prompt engineering techniques by studying hundreds of real-world examples from working AI assistants.

USE CASE 4

Reverse-engineer the behavior and personality of a specific GPT you've interacted with.

Getting it running

Difficulty · easy Time to first run · 5min
License could not be detected automatically. Check the repository's LICENSE file before use.

In plain English

This repository is a large public collection of "leaked" system prompts from custom GPTs, the specialized AI assistants that users and developers build on top of ChatGPT using OpenAI's GPT Builder tool. When someone creates a custom GPT, they write a hidden set of instructions (called a system prompt) that tells the AI how to behave, what persona to adopt, and what rules to follow. Normally these instructions are kept secret, but through various means, many have been extracted and shared publicly. This repo gathers hundreds of those exposed prompts in one place. The problem it solves is transparency and curiosity: anyone who wants to understand how a popular custom GPT actually works under the hood, what instructions make "Grimoire" a coding wizard, or what makes "Math Mentor" respond a certain way, can simply read the prompt here. It is also useful for developers who want inspiration or reference material when building their own custom GPTs. The collection spans an enormous variety of categories: coding assistants, roleplay characters, creative writing tools, image generation helpers, language tutors, career coaches, and many more. Each prompt is stored as a simple Markdown file named after the GPT it came from. There is no executable code in this repository, the primary language is listed as unknown because it is entirely a document/text collection. No framework or runtime is involved. You would use this repo if you are curious about prompt engineering techniques, want to reverse-engineer how a specific popular GPT was built, or are looking for templates and patterns to design your own AI assistant instructions.

Copy-paste prompts

Prompt 1
Show me the system prompt for [GPT name] from this collection and explain what instructions make it behave that way.
Prompt 2
Find prompts in this repo that use [technique, e.g., 'roleplay'] and show me how they structure their instructions.
Prompt 3
I want to build a custom GPT for [task]. Show me similar prompts from this collection that I can use as a template.
Prompt 4
What are the most common patterns or tricks used in these leaked GPT prompts to control AI behavior?
Prompt 5
Extract and compare the system prompts for [two GPT names] to see how they differ in their instructions.
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Generated 2026-05-18 · Model: sonnet-4-6 · Verify against the repo before relying on details.