Engineer adds a 480 Hz verification gate after Claude approved broken 3D screenshots

What the research found

A 30-year engineer describes a solo Claude-built 3D pool game where the agent passed its own broken screenshots, and the fix was a deterministic 480 Hz physics solver plus verification gate.

Claims and how well the evidence supports them

1. The agent marked a build verified from a single entry-frame screenshot with zero console errors 99%
2. gltfpack -cc quantization crushed coordinates above 1 meter on a 119,302 triangle pool table mesh 98%
3. The custom physics engine uses a 1/480 second sub-step solver 99%
4. Pool ball radius is 57.15mm on a 2.24m x 1.12m table 77%

Evidence

• reddit.com https://reddit.com/r/ClaudeAI/comments/1xdndpo/30_years_in_software_taught_me_why_ai_didnt_drop

Actionability rated medium.