Squire lets you create template Playground Book.
It works closely next to Swift Playgrounds.
Commit button is persisting user changes (including added pages) performed in Swift Playgrounds, so resetting page will no longer clear user changes.
Also it lets you mark some pages as shared, which means that their public content (structs, classes etc) will be accessible for other pages in the same Playground Book (committed changes only).
You can also import swift files (drag&drop on iPad) into Playground Book open in Squire to use these files contents under the hood in Swift Playgrounds.
It makes possible building more complex prototypes without macOS and Xcode around.
After preparing such prototype you can export all shared pages from your Playground Book as swift files and write them to iCloud Drive, share via AirDrop etc. for real life usage in Xcode later.
It is developer tool made by developer for developers to perform next step to postPC era.
Video guidelines: https://www.icloud.com/sharedalbum/#B0nGfnH8tZ7MT3