Stop Vibe Coding: How do you enforce architecture with AI agents?

We’ve all experienced it. You point an AI agent (Cursor, Claude, Gemini) at a task, and in 30 seconds, you have a functional feature. It feels like magic. It’s the peak of "Vibe Coding."

But then the reality of the "drift" sets in.

If you aren't careful, the agent eventually: ❌ Skips a security guard (auth/rate-limiting). ❌ Mixes up Client and Server components. ❌ Ignores your specific Data Access Layer patterns. ❌ Creates technical debt that you have to clean up later.

I’ve started looking at it through the lens of The Architect vs. The Builder.

• You (the human) are the Architect. You own the vision and the "Building Code."

• The AI is the Builder. It’s incredibly fast at stacking bricks, but it doesn't always know when it’s cutting corners on the foundation.

I built Guardrails to act as that "Building Code" — a drop-in set of rules that converts the AI from a loosecoder into a disciplined builder.

I’m curious to hear from this community:

1. How are you keeping your AI agents "on the rails" as your codebase grows?

2. Do you use custom prompts, .cursorrules, or a dedicated documentation suite like Guardrails?

3. What is the one architectural rule your AI agent keeps breaking?

Let's discuss! 🛡️🏗️