Open Source Reverse Engineering MCP Tool REA Released to Help Agents Understand Apps Without Source Code

According to a report published by Juejin on November 11, 2026 at 06:29, the open-source reverse engineering MCP tool REA is designed to let AI agents reverse engineer and understand arbitrary applications without access to their source code. The report describes a common dilemma: when a developer spots a polished feature in a competing app and wants to know how it was built, but has no source code, the only available path has traditionally been the one taken by professional reverse engineers. That route involves opening IDA or Ghidra and reading decompiled pseudocode line by line, a process that can eat up days and is effectively closed to ordinary developers. REA reportedly addresses this by writing the evidence gathered during reverse engineering, along with its boundaries, directly into the design, allowing regular developers to bypass the cumbersome traditional decompilation workflow. This Juejin piece appears to be the first public coverage of the tool, and no further developments have been reported since.