---
title: "Your Vibe-Coded App Can Look Right And Fall Apart After Launch. REA Shows You How Real Teams Build."
url: "https://reamcp.dev/ko/cases/your-vibe-coded-app-can-look-right-and-fall-apart-after-laun-464f8c"
source: "https://www.youtube.com/watch?v=PseF3LyXQ04"
source_type: "resource"
author: "AI News & Strategy Daily | Nate B Jones"
author_handle: "natebjones"
stars: 0
category: "앱 기능 재현"
categories: ["app-recreation"]
tags: ["interoperability", "rea", "reverse-engineering", "tutorial", "vibe-coding"]
added: "2026-10-16T02:14:38.125Z"
updated: "2026-10-15T14:00:11.000Z"
locale: "ko"
content_locale: "ko"
---

# Your Vibe-Coded App Can Look Right And Fall Apart After Launch. REA Shows You How Real Teams Build.

Nate B Jones가 Claude Code / Codex와 함께 REA(Reverse Engineer Anything)의 구체적인 사용 사례를 소개합니다: 인증 앱이 6자리 코드를 생성하는 방법, Notion의 복사 및 붙여넣기 작동 방식, Windows 계산기의 퍼센트 버튼이 중요한 이유, Ledger Reborn이 회계 앱을 만들기 전에 QuickBooks를 연구한 방법.

## Description

22분 분량의 비디오와 링크된 Substack 심층 분석은 REA(Reverse Engineer Anything)가 Claude Code 또는 OpenAI Codex를 통해 컴퓨터의 소프트웨어를 열고 실제로 어떻게 작동하는지 설명하는 방법을 보여줍니다. 챕터에서는 인증 앱 코드 파생, Notion의 클립보드 동작, Windows 계산기의 퍼센트 버튼, Ledger Reborn 뒤의 QuickBooks 조사, REA의 깊이를 제어하는 팁과 한계를 다룹니다.

## Original README

Your Vibe-Coded App Can Look Right And Fall Apart After Launch. REA Shows You How Real Teams Build.

REA (Reverse Engineer Anything) lets Claude Code or OpenAI Codex open up the software on your computer and show you how it actually works. If you've ever vibe-coded an app that looked right and fell apart after launch, this is how you learn what real software has to do.

Full post:
https://natesnewsletter.substack.com/p/rea-reverse-engineer-anything?utm_source=youtube&utm_medium=video&utm_campaign=rea-reverse-engineer-anything-launch&utm_content=description

Nate's Library MCP (every prompt kit and guide, inside the AI you already use):
https://unlock-ai.natebjones.com/guides/how-to-connect-nates-library?utm_source=youtube&utm_medium=video&utm_campaign=rea-reverse-engineer-anything-launch&utm_content=description

My Links 🔗
👉🏻 Newsletter: https://natesnewsletter.substack.com/?utm_source=youtube&utm_medium=video&utm_campaign=rea-reverse-engineer-anything-launch&utm_content=description
👉🏻 X: https://x.com/natebjones
👉🏻 TikTok: https://www.tiktok.com/@nate.b.jones
👉🏻 Instagram: https://www.instagram.com/nate.b.jones

What's really happening with REA?

The common story is that REA means the death of software, but the real question is how few of us understand the software we already use, let alone the software we're trying to build.

In this video, I share the inside scoop on using REA to understand software:
- How an authenticator app turns a key and the clock into six digits
- What Notion's copy and paste reveals about building your own editor
- Why a calculator's percent button shows what a real requirement looks like
- How Ledger Reborn used a QuickBooks investigation to build a new accounting app

Agents can write more of the code now, so the people who understand what software should do, developers or not, get the biggest advantage.

Chapters:
00:00 Why REA is bigger than cloning software
01:05 How an authenticator app makes its codes
03:09 Why REA isn't the death of software
03:38 Two jobs REA does for non-developers
04:28 Turning a research tool idea into requirements
05:43 How Notion's copy and paste really works
08:49 Asking why software was built that way
11:01 The Windows calculator percentage button
13:20 Ledger Reborn and the QuickBooks investigation
16:30 For developers: the dinosaur game and DX-Ball
18:46 Tell REA how deep to go
19:52 Getting started and what REA can't see

Listen to this video as a podcast.

Spotify: https://open.spotify.com/show/0gkFdjd1wptEKJKLu9LbZ4
Apple Podcasts: https://podcasts.apple.com/us/podcast/ai-news-strategy-daily-with-nate-b-jones/id1877109372