I gave an AI agent one prompt and it built a living city in Godot 4

I've been building games in Godot for a while. Recently I started using AI coding agents (Claude Code, Cursor) to speed things up. They're good at writing GDScript, but they have a fundamental problem: they can't see what they're doing. The agent writes code, you run the game, something is broken, you describe the problem back to the agent, it tries again. Back and forth. Sometimes for hours on simple placement issues. So I built something to fix that. The problem with blind agents If you tell an AI agent "place a shelf near the printer", it guesses coordinates. Maybe (2, 0, 0.