Core Animation Reference Search these docs to answer questions about Core Animation (the QuartzCore framework). Use this skill when working directly with , layer-backed UIKit/AppKit views, explicit keyframe or spring animations on layer properties, particle systems, or per-frame callbacks via . For SwiftUI's declarative animation API ( , , , transitions), use instead. For SwiftUI immediate-mode drawing, use and . Return Format Always include: 1. Summary — answer the question concisely. 2. File paths — list relevant files for full details, e.g.: - for layer geometry, contents, hierarchy - for…