How close to one shot?

A procedural galaxy in a single HTML file: Three.js, starfield, post processing, free flight camera. Codehamr generated it from this prompt on GitHub.

It's a useful test of one shot capability: complex enough to push a coding agent to its limit, visually obvious enough that you see at a glance whether it worked, or how much follow up prompting it took. And honestly, we chose this example because we just love space.