Hi I started looking into swift 4 runtime I created an issue for initial support for swift 4 Initial Support for Swift 4 https://github.com/apache/incubator-openwhisk-runtime-swift/issues/3
I got a PR that produces a working runtime swift 4 https://github.com/apache/incubator-openwhisk-runtime-swift/pull/1 you can give it a try today I published an image in my docker hub wsk action update swift4Action hello.swift --docker csantanapr/action-swift-v4 or "bx wsk ..." if you are using IBM Cloud Also I created an issue for looking into a new function API for Codable ,Async, and Swift Web Proxy https://github.com/apache/incubator-openwhisk-runtime-swift/issues/2 --Carlos
