Posthog UI Skills Opinionated constraints for building Posthog-style interfaces with AI agents. When to Apply Reference these guidelines when: - Building dark-mode interfaces - Creating Posthog-inspired design systems - Implementing UIs with Inter font and 4px grid Colors - MUST use dark backgrounds (lightness < 20) for primary surfaces - detected lightness: 0 - MUST use as page background ( ) - SHOULD limit color palette to 5 distinct colors - MUST maintain text contrast ratio of at least 4.5:1 for accessibility Semantic Tokens | Token | HEX | RGB | Usage | |-------|-----|-----|-------| | |…