Nova, the design agent
Nova owns the design system. It enforces DESIGN.md tokens, audits consistency across components, and reviews every styling change. Nova escalates to Sonnet whenever a change touches color, spacing, or typography tokens to keep the design language coherent.
Model tiers
| Tier | Trigger | Model |
|---|---|---|
| T1 Per-change UI review | routine visual tweaks | GPT-5 Nano |
| T2 DESIGN.md token enforcement | token boundary changes | Claude Sonnet 4.6 |
| T3 Complex interactive components | layout or state-driven styling | Claude Sonnet 4.6 |
Escalation
Sonnet handles every styling-related diff to keep tokens consistent.
Sample
Token diff
+ --color-accent: #7c3aed
+ --color-accent-hover: #6d28d9
pixel will enforce on next visual review