Individual skill

core-animation

API reference: Core Animation (QuartzCore). Query for CALayer, CAAnimation, CABasicAnimation, CAKeyframeAnimation, CASpringAnimation, CATransaction, CAShapeLayer, CAGradientLayer, CAEmitterLayer, CATransform3D, CADisplayLink.

skills/core-animation/SKILL.md

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Repository last updated: Sep 26, 2026
License: MIT

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SKILL.mdcore · 4,879 bytes
caanimation.mddoc · 7,047 bytes
caanimationgroup.mddoc · 3,698 bytes
cabasicanimation.mddoc · 7,615 bytes
cadisplaylink.mddoc · 9,647 bytes
caemittercell.mddoc · 7,568 bytes
caemitterlayer.mddoc · 5,741 bytes
cagradientlayer.mddoc · 3,706 bytes
cakeyframeanimation.mddoc · 6,080 bytes
calayer.mddoc · 22,326 bytes
camediatiming.mddoc · 5,192 bytes
cametallayer.mddoc · 9,340 bytes
capropertyanimation.mddoc · 4,197 bytes
careplicatorlayer.mddoc · 6,190 bytes
cashapelayer.mddoc · 5,962 bytes
caspringanimation.mddoc · 4,654 bytes
catextlayer.mddoc · 4,241 bytes
catiledlayer.mddoc · 3,850 bytes
catransaction.mddoc · 6,608 bytes
catransform3d.mddoc · 4,587 bytes
catransition.mddoc · 5,710 bytes
core-animation-index.mddoc · 81,216 bytes

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# Core Animation Reference

Search these docs to answer questions about Core Animation (the QuartzCore framework). Use this skill when working directly with `CALayer`, layer-backed UIKit/AppKit views, explicit keyframe or spring animations on layer properties, particle systems, or per-frame callbacks via `CADisplayLink`.

For SwiftUI's declarative animation API (`withAnimation`, `Animation`, `.animation(_:value:)`, transitions), use Apple's `swiftui-specialist` skill (its animations reference) instead. For SwiftUI immediate-mode drawing, use `swiftui/canvas.md` and `swiftui/graphicscontext.md`.

## Return Format

Always include:
1. **Summary** — answer the question concisely.
2. **File paths** — list relevant files for full details, e.g.:
   - `calayer.md` for layer geometry, contents, hierarchy
   - `cabasicanimation.md` for animating a single property between two values
   - `catransaction.md` for batching, disabling implicit animations, or changing default duration