UI Reasoning: Design System/Component Library. Recommended Pattern: Feature-Rich + Documentation. Style Priority: Minimalism + Accessible & Ethical. Color Mood: Clear hierarchy + Code-like structure. Typography Mood: Monospace + Clear typography. Key Effects: Code copy animations + Component previews. Decision Rules: {"must_have": "search", "must_have": "code-examples"}. Anti-Patterns: Poor documentation + No live preview. Severity: HIGH.