What Is Vibe Coding?
TL;DR: Vibe coding refers to the practice of building software by describing what you want in plain English and letting an AI agent write the code. It lowers the floor for who can build an app, and raises the ceiling on how fast an app can be built.
What it is
The term was coined by Andrej Karpathy in February 2025. As he defined it, vibe coding means you describe a feature, the AI writes the code, and you accept it without necessarily reading or understanding what it generated. You are directing the AI through intent, not syntax.
In practice, vibe coding refers to any workflow where natural language is the primary interface for building software, using tools like Lovable, Bolt, Replit, or Cursor to generate code from a description rather than writing it by hand.
Why it works, until it doesn't
For simple, greenfield apps, vibe coding is genuinely fast. You can go from idea to working prototype in hours without touching a line of code.
The problem is scale. As the codebase grows, the AI's context fills with previous decisions, component definitions, and schema details. When context gets crowded, the agent starts forgetting, making contradictory decisions, hallucinating variable names, and breaking existing features while adding new ones. This is context rot, and it's why most vibe coding projects hit the 80% wall: functional, but unfinishable.
The fix isn't to stop vibe coding. It is to give the AI a stable architecture spec before you start prompting, so it has a source of truth to work from instead of inventing decisions as it goes.
Zalcro generates the Architecture Design Document and Prompt Pack vibe coders need before their first prompt, so the AI builds on a defined foundation instead of improvising one.