The article introduces REA, a tool that enables users to reverse-engineer software with the help of a coding agent. REA provides a way to inspect and understand how a program works, and it can be used to analyze various types of software, including native binaries, JavaScript, and Electron applications. The tool aims to make reverse engineering more accessible and user-friendly. REA can be set up using a simple command and can be used to inspect and rebuild software components, such as the Windows Calculator's percentage button.