SKILL: Angular Material + CDK + Animations

Use when

• Adding or refactoring UI that uses @angular/material, @angular/cdk, or @angular/animations.
• Building overlays, drag-drop, virtual scroll, focus management, or motion/transition behaviors.

Workflow

1. Start from the simplest Material component that fits; only drop to CDK primitives when needed.
2. Keep inputs/outputs signal-first; avoid component-internal RxJS state.
3. If using CDK overlays/focus traps/observers, define ownership and dispose on destroy.
4. If adding motion:
   • CSS transitions for small state changes
   • @angular/animations only for coordinated/complex transitions
   • always respect prefers-reduced-motion
5. Validate a11y: labels, focus order, keyboard operation, and visible focus.

Checklist (PR-ready)

• Uses M3 tokens (no raw hex/px).
• Overlays/listeners/observers cleaned up.
• Reduced-motion path exists.
• No “cute” drag/animation that adds complexity without user value.

References

• .github/instructions/62-angular-core-ui-copilot-instructions.md
• .github/instructions/71-angular-material-cdk-animations-copilot-instructions.md
• .github/skills/material-design-3/skill.md
• .github/skills/angular-ecosystem/skill.md