Tact CloudKit code is released as open-source library Canopy

Tact developers released library to work with CloudKit as open source – Canopy.

Canopy helps you write better, more testable CloudKit apps. It isolates the CloudKit dependency so you can write fast and reliable tests for your CloudKit-related features, and implements standard CloudKit-related behaviors.

GitHub: Canopy (documentation)

Reference: CloudKit code from Tact is now available as Canopy open-source library