A comprehensive reference for CloudKit that covers the modern sync landscape, from raw APIs to the newer CKSyncEngine introduced at WWDC 2023 and SwiftData integration. Useful when you're deciding between different CloudKit approaches or implementing structured data sync to iCloud. The skill focuses on database-based storage rather than simple file sync, covering public/private/shared databases, conflict resolution, and debugging sync issues. Part of the larger Axiom collection from charleswiltgen, which has picked up solid traction with nearly 1,000 GitHub stars and 200 installs. If you're building anything that syncs structured data through iCloud, this gives you the reference material to make informed architectural choices.
npx skills add https://github.com/charleswiltgen/axiom --skill axiom-cloudkit-ref