TL;DR
A "loop" is not an agent grading its own work. It is an external script that re-runs the agent, plus a separate check the agent cannot edit.
I turned "feels smooth" into an FPS number and let the loop optimize toward it.
I set the target too high to be reachable on a 60Hz screen. The loop kept failing but never faked the result. The bug was in my number, not the code.
Could I get an AI agent to make my website faster without me sitting there, running it, reading the numbers, and running it again? That is what this series is about. Not how I built a website, because the website is boring on purpose, but how you wrap an agent in a loop that works toward a goal on its own, and how you stop it from cheating along the way.
