Overview

REA is a reverse‑engineering tool that connects to your coding agent and gives it the ability to walk through the internals of a program. To begin, a developer runs `npx rea‑agents@latest setup` in a terminal. The command downloads the REA package, asks the agent to approve a setup plan, and then restarts the agent to activate the new APIs. Once installed, the agent can query REA for code fragments, architecture information, and runtime observations, all of which are packaged as plain text and passed back to the agent as part of its reply.

Typical usage starts with a question about a target. For instance, a developer might ask, “Why does 200 + 10 % give 220?” The agent then instructs REA to inspect the Windows Calculator DLL or a web page. REA pulls the relevant assembly instructions, such as those beginning with `MOV EAX, dword ptr […]`, and returns them in the reply. The agent can also produce a decompiled version of the code, identify function calls, and trace the specific branching logic. In the Calculator example, REA provides the exact rule that the % button multiplies the current number by the percent value and then adds the result, which the agent explains in a concise message.

Another example involves a browser game. The agent asks REA to analyze the dinosaur game, which is served from a Chromium‑derived browser. REA supplies the JavaScript source, highlighting the line that increments speed: `if (this.currentSpeed < this.config.MAX_SPEED) { this.currentSpeed += this.config.ACCELERATION; }`. The agent then recaps the rule, which starts at 6 and increases until 13, and even offers a small demo that lets the user alter the speed with a slider.

Routines that are not covered by the public text include limitations on how many instructions can be processed at once, or whether REA can handle obfuscated binaries. The directory listing also does not reveal any pricing structure, subscription tiers, or explicit limitations on usage. The tool is geared toward developers who already have a coding agent and want a low‑overhead way to interrogate their own or third‑party software. Those who need a standalone graphical interface or who do not use a coding agent in their workflow may find REA less convenient. The installation steps are command‑line only; no GUI is described.