{
 "schema_version": 1,
 "generated": "2026-10-19",
 "id": "morluto-rea--learn-how-app-feature-works",
 "repo": "morluto/rea",
 "repo_url": "https://github.com/morluto/rea",
 "repo_slug": "morluto-rea",
 "title": "Learn how a feature in another app works",
 "page_title": "How to learn how a feature in another app works with rea",
 "summary": "Point your agent at an installed app and get an explanation of one feature, with the evidence behind it.",
 "who": "Indie developer who likes a feature in a desktop app and wants to understand how it is built",
 "problem": "The app has no public source code, so you cannot tell how the feature is put together.",
 "outcome": "A written explanation of how the feature works, with the evidence listed and unknowns flagged.",
 "steps": [
  "Run npx rea-agents setup, pick your agent, approve the changes, then restart the agent.",
  "Ask your agent to investigate one specific feature in the target app using REA.",
  "Ask it to show the evidence for each claim and mark anything it is guessing.",
  "Read the explanation and ask follow-up questions about the parts you will reuse."
 ],
 "agent_prompt": "Use REA to work out how <feature> works in <app> at <path>. Show the evidence, flag what you are guessing, and summarize the design in plain words. Verify every claim points to a file, symbol or observed behavior.",
 "agents": [
  "claude-code",
  "codex",
  "cursor",
  "gemini-cli"
 ],
 "difficulty": "Intermediate",
 "time": "45 minutes",
 "basis": "field",
 "caveat": "Only analyze software you own or are licensed to inspect, and check the app's license terms. REA can only infer backend logic from what the client exposes.",
 "category": "Software & DevOps",
 "tags": [
  "Software & DevOps"
 ],
 "lang": "typescript",
 "requirements": [
  "Node.js 22.x (>=22.19), 24.x (>=24.11), or 26+, plus npm",
  "An MCP-capable AI agent such as Claude Code, Codex, Cursor or Gemini CLI",
  "For native binaries: Hopper, Ghidra or IDA installed locally",
  "For websites: a Chrome-family browser",
  "On Linux: a procps-compatible ps on PATH for JavaScript/Electron analysis"
 ],
 "risk": "dual-use",
 "seen_in_the_wild": true,
 "best": false,
 "score": 0.69,
 "evidence": [
  {
   "platform": "x",
   "url": "https://x.com/i/web/status/2112187888741822588",
   "posted": "2026-10-19"
  },
  {
   "platform": "reddit",
   "url": "https://www.reddit.com/r/singularity/comments/1x2rrsi/reverse_engineer_anything_is_a_great_toolkit_what/",
   "posted": "1791670940"
  }
 ],
 "url": "https://dedupedai.com/use-cases/morluto-rea/learn-how-app-feature-works/",
 "md": "https://dedupedai.com/use-cases/morluto-rea/learn-how-app-feature-works/index.md",
 "disclaimer": "Deduped lists open-source repositories that belong to other people. We do not own, maintain, audit, or vouch for any of them, and a repo appearing here is not an endorsement or a safety check. The use cases, steps, and prompts are written by AI and may be incomplete, outdated, or just wrong. Where a use case is marked \"Seen in the wild\", we link to public posts where someone described something similar, but we have not verified those posts and the use case itself is still our AI's own write-up. Use all of this at your own risk. Only run code, commands, or agents on systems and accounts you are authorized to use, and read the code and every command before you run it, especially anything that touches credentials, files, or the network. Nothing here is professional, security, legal, or financial advice. All trademarks and project names belong to their respective owners, and their use here does not imply affiliation. Content is provided as is, without warranties of any kind. Found a mistake, a safety problem, or something you want removed? Email hello@dedupedai.com and we will look at it promptly."
}