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REA + Claude Code traces a feature through an app REA (Reverse Engineer Anything) is the free tool that connects your coding agent to an app's files. Its official guide hands you the prompt Use REA to find what happens when I export notes in this app. Where is the CSV created? What the guide's example app answers → the button calls an API in the page → the API sends a named message (IPC) inward → one handler in the main process catches it → that handler writes notes.csv to Downloads REA matched 1 message to 1 handler, with 0 ambiguous. The guide says plainly that the path is inferred from code, and a runtime capture is how you check what really runs The example is a small zip on http://rea.tools. It needs only Node.js and npm, no Electron install Claude Code is on REA's setup list, next to Codex, Cursor, Gemini CLI and Grok Build
