SwiftSyft's library structure was made using pod lib create. If you're not familiar with it, you can check out https://guides.cocoapods.org/making/using-pod-lib-create.
You can work on the project by opening Example/SwiftSyft.xcworkspace. When the project is open on Xcode, you can work on the SwiftSyft pod itself in Pods/Development Pods/SwiftSyft/Classes/*
SwiftSyft is available under the Apache 2 license. See the LICENSE file for more info.