What is Vibecoding?

Building products with AI coding agents at unprecedented velocity—and the validation layer that makes it sustainable

The Definition

Vibecoding is the practice of building products with AI coding agents at a velocity that would have been impossible just months ago. What used to take weeks now takes days. What took days now takes hours. What took hours now takes minutes.

It's called "vibecoding" because you're building based on vibes, intuition, and rapid iteration rather than lengthy spec documents and waterfall planning. You sketch an idea, an AI agent generates the code, and you're validating with real users before the coffee gets cold.

How We Got Here

The timeline of development velocity has been remarkable:

We're now in the vibecoding era. The constraint is no longer "how fast can we code" but "how fast can we validate what to code." This shift marks the end of the Taylorist Century—where execution speed mattered most—and the beginning of an era where product judgment is the bottleneck.

The Vibecoding Workflow

Traditional development looked like this:

Vibecoding looks like this:

The key difference? The validation step happens before major time investment, not after. You validate the idea with AI personas and pre-mortem analysis before the AI agent writes thousands of lines of code.

The Vibecoding Paradox

Speed without validation is just expensive mistakes at scale.

Here's the paradox: AI coding agents have made building 10-50x faster, but they haven't made product judgment 10-50x better. In fact, the ease of building has made it more dangerous than ever to build the wrong thing.

When coding took weeks, there was natural friction that forced validation. You had time to think, to research competitors, to talk to users. The slowness was a feature, not a bug.

In the vibecoding era, you can ship a full feature before your morning standup. That's incredible leverage—if you're building the right thing. It's devastating opportunity cost if you're not.

The Missing Validation Layer

This is where Cutline comes in. We're building the validation layer for the vibecoding era.

Before your AI coding agent writes the first line, Cutline helps you answer:

• Will users actually want this?
• What assumptions am I making that could be wrong?
• What are the hidden risks I'm not seeing?
• How would my target personas react to this?
• Is this the highest-leverage thing I could build right now?

You get answers in seconds, not weeks. AI personas stress-test your idea. Pre-mortem analysis surfaces risks. Risk scoring helps you prioritize ruthlessly.

The result? You move at vibecoding speed, but you build the right things.

Who's Vibecoding Today

Vibecoding isn't theoretical. It's happening right now:

• Solo founders shipping full SaaS products in weekends that would have taken months in 2023
• Indie hackers launching 3-4 products in the time it used to take to launch one
• Small teams competing with companies 10x their size by moving faster
• Product managers prototyping ideas themselves instead of waiting for dev cycles

The common thread? They've figured out how to validate fast and build faster. They use AI for both the thinking and the doing. That's why I built Cutline—to give every founder an AI product cofounder for the validation layer.

The Future of Vibecoding

We're still in the early days. AI coding agents are getting better every month. What takes hours today will take minutes tomorrow.

But the fundamental constraint won't change: knowing what to build is harder than building it.

The winners in the vibecoding era won't be the ones who ship fastest. They'll be the ones who ship the right things fastest.

That requires two things:

1. AI coding agents to build at unprecedented velocity
2. AI validation systems to ensure you're building the right thing

Build fast. Build right. That's vibecoding.