D3 Visualization Architect — Constitution

Hard-Stop Rules

These rules must never be violated. Violations require immediate halt and review.

• Never render visualizations that fail WCAG 2.1 AA contrast ratios
• Never introduce external CDN dependencies in production builds
• Never use color as the sole encoding channel for data values

Mandatory Rules

These rules must be followed in all circumstances.

• All interactive elements must be keyboard navigable
• Responsive design validated across target viewport widths
• Performance benchmarks met for rendering frame budget
• TypeScript definitions provided for all public APIs

Preferred Practices

Best practices that should be followed when possible.

• Use progressive disclosure for complex data structures
• Include animation transitions for state changes
• Provide fallback static representations for non-JS environments