What Is Vibe Coding — And Why It Always Breaks in Production

What is vibe coding?

Vibe coding is the practice of building software primarily through natural language prompts — describing what you want, having an AI like Cursor or Claude Code write it, reviewing loosely, and shipping. The term was coined by Andrej Karpathy in early 2025 and immediately went viral because it described what thousands of solo founders and indie hackers were already doing.

Why production breaks the vibe

The core problem is simple: AI models are trained on patterns. They produce code that looks correct and passes basic tests. But production has edge cases, real users with unexpected behavior, race conditions, third-party API failures, and network timeouts. None of those show up in a Cursor chat window.

The most common vibe-coding production failures

Here are the patterns we see most often at ProdFix when developers ship AI-generated code:

• Unhandled promise rejections — AI almost always forgets to handle async failure paths
• Missing input validation — AI validates for happy path, not adversarial users
• Type mismatches from API responses — AI assumes API shapes match what the docs say
• Race conditions in useEffect — AI writes correct-looking React hooks that fail under concurrent renders
• Silent auth failures — AI handles 401 responses by redirecting, but misses token expiry edge cases

The vibe coding production loop (broken)

The typical vibe coder flow: prompt → generate → test in dev → ship → users hit bugs → frantic debugging. The debugging step is where the vibe dies. Without proper error tracking, you're flying blind — no stack traces, no user context, no frequency data.

How to vibe code safely

You don't have to slow down. You just need a safety net:

1. Add error monitoring on day one — one script tag or npm package, runs passively
2. Watch your first 100 sessions — real users always find things you missed
3. Connect your error tracker to your IDE via MCP — so when a bug hits prod, your AI coding tool already knows the context
4. Set up alerts for new error types — catch new bugs within minutes, not days

ProdFix was built for vibe coders

ProdFix is a monitoring tool built specifically for the way modern solo founders and vibe coders ship. One SDK, installs in 2 minutes, captures errors + UX + performance + security. And with the MCP integration, Cursor and Claude Code can read your production errors directly — so you can ask "what broke in prod?" and get a code fix immediately.