[arena-ai-coding-agent]

Summary

• add licensed, machine-readable visual reference and 3D scene contracts with a zero-dependency validator
• add an original poster-first 3D Prism Stage with semantic, reduced-motion, WebGL-unavailable, and low-power fallbacks
• add four original visual-direction reference images with documented usage and licensing
• add an authorized PNG screenshot-to-code reconstruction starter that generates a semantic HTML scaffold and reconstruction brief
• add evidence-led AI design, 3D production, and visual validation protocols
• bound and relabel source-level simulator scoring so it is not presented as a rendered visual-quality certification

Validation

• node --check skills/utils/visual-contract-checker.js
• node --check skills/utils/reference-to-code.js
• node --check skills/utils/design-simulator.js
• node skills/utils/visual-contract-checker.js --assets assets
• generated and verified a reconstruction starter from an included PNG reference
• negative contract test for missing license metadata
• git diff --check

Notes

The image-to-code capability is deliberately described as an authorized screenshot reconstruction starter, not an exact conversion guarantee. Screenshot-only input cannot reveal hidden DOM, responsive behavior, semantic content, interactions, fonts, or asset licensing.

[REX-codebase]

What you did