- Foundation Package Preview Now Available • https://github.com/apple/swift-foundation is the native, unified Swift implementation The Swift code in the package is the core of the Foundation framework that ships on macOS, iOS, and other Apple platforms.
At the moment, building/testing swift-corelibs-foundation on macOS with Xcode is broken so very difficult/almost impossible • Contributing to swift-foundation rather than swift-corelibs- foundation is recommended
Swift - Evolution / Discussion - Swift Forums • swift-testing is under active, ongoing development • Contributing to swift-testing rather than swift-corelibs-xctest is recommended