Tools & repos

See How an App's Feature Works with Claude Code and REA, Free

REA, the top repo on GitHub this week, lets Claude Code look inside an app on your own machine and explain how a feature works, with the evidence, then build your own version. Setup in one command, the prompt to use, and the catch

Alex ChenAlex Chen@nocodealex · 50,000+ follow on Instagram
2min read
1prompts to copy
4numbered steps
5sections

You see a feature you love in an app, like how its search finds the right note instantly, and you want the same thing in your own project. REA gives Claude Code the tools to find out how it works, without the app's source code.

Here's what it does, how to set it up in one command, the prompt to paste, and the catch.

What REA does

  • It connects Claude Code to inspection tools for desktop apps, JavaScript and Electron apps, .NET programs, Android apps and websites.
  • Claude traces the feature you asked about, explains how it works, and shows the evidence behind each conclusion (the calls, strings and modules it found).
  • Then it can write and test your own version of that feature for your project.
  • Everything runs on your own machine. It's free and open source (MIT), with over 100,000 GitHub stars.
Free, for your emailGet the full setup steps + the copy-paste setup prompt

Free, for your email

Get the full setup steps + the copy-paste setup prompt

The rest of this guide (4 more sections, 1 copy-paste prompt) opens right here. The setup prompt, one paste into Claude that sets it all up, comes by email only. Use your real address.

Unlocks: Step 1: set it up in one command · Step 2: ask about a feature · The catch · Sources

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