reverse-gpt

Name: reverse-gpt
Availability: InStock
Author: leessju

Extract a custom GPT's master prompt and behavior specifications via automated browser interactions.

Updated Apr 11, 2026

Search Tags:#gpt #browser-automation #reverse-engineering #prompt-extraction #master-prompt #custom-gpt #specification-analysis

Ready to run

npx skills add https://github.com/leessju/claude-skills --skill reverse-gpt

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: reverse-gpt
Source: https://github.com/leessju/claude-skills/tree/main/reverse-gpt
Command: npx skills add https://github.com/leessju/claude-skills --skill reverse-gpt

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Reverse-engineer a custom GPT's master prompt and behavior rules by safely automating browser interactions to reveal underlying instructions.

Core Features & Use Cases

Open a target GPT URL in a controlled browser session and identify the custom GPT name.
Interactively send structured questions and capture responses to reconstruct the behavior spec.
Generate a portable working spec and summary report suitable for documentation or auditing.

Quick Start

Provide the GPT URL and optional Chrome profile to initiate the reverse-engineering workflow and produce a master prompt report.

Frequently Asked Questions about reverse-gpt

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I extract the master prompt from a custom GPT?▼

To extract a master prompt from a custom GPT, you can automate browser interactions to navigate the target URL, send structured questions, and compile the responses into a formal working specification. This reverse-engineering approach reconstructs the underlying behavior rules.

Can I reverse engineer a custom GPT's behavior specifications automatically?▼

Yes, you can reverse engineer a custom GPT's behavior specifications automatically by using browser automation to interact with the GPT URL. The process involves sending targeted questions and capturing responses to generate a portable working spec and summary report.

What do I need to start reverse engineering a GPT prompt via browser automation?▼

To start reverse engineering a GPT prompt via browser automation, you need the target GPT URL and an optional Chrome profile. Providing these inputs initiates the workflow to navigate the page, execute structured questions, and extract the system instructions.

What is the best way to reconstruct a custom GPT's system prompt?▼

The best way to reconstruct a custom GPT's system prompt is through automated browser interactions that systematically query the model. This method reveals underlying instructions and produces a formal working spec suitable for documentation or auditing.

Does prompt extraction work on any custom GPT URL?▼

Prompt extraction via browser automation works on any accessible custom GPT URL where interactive questions can be executed. It navigates a controlled browser session to identify the GPT name and collect behavioral responses for specification analysis.