D2 Diagram Skill

Generate diagrams using D2's declarative syntax. D2 produces clean, modern-looking diagrams with excellent auto-layout, nested containers, and multiple layout engines.

When to use D2:

• Architecture diagrams with nested components (D2's container nesting is excellent)
• Clean, modern aesthetic without manual positioning
• User has d2 installed or prefers it
• Network/infrastructure diagrams
• Deployment diagrams with hierarchical grouping

When another format is better:

• Maximum visual customization (SVG)
• Diagrams in GitHub/GitLab markdown (Mermaid -- D2 doesn't render natively)
• Whiteboard/sketch aesthetic (Excalidraw)
• ER diagrams, Gantt charts (Mermaid has better support)

Consult the design-system skill for color, composition, and quality rules.