From Demo to Production: The Guardrails That Make an AI Agent Safe to Ship

Hook: Most "AI agents" you see on the internet are demos. Here's the single most common

reason they never reach production — and a small, open-source harness that gets past it.

We are past the phase where the hard part of building an AI agent was calling the model.

The hard part now is the 10% nobody talks about: what stops the agent from doing something