@dotdev
(on r/Shortcuts Discord and RoutineHub) has discovered a method of programmatically creating shortcut actions that can be directly pasted into any shortcut. Without signing. A GAME CHANGER🤯
The trick is to set the UTI of an action plist to com.apple.shortcuts.action
using the Actions app and copy to clipboard: Post on r/Shortcuts Discord server
Now you can copy and paste multiple actions using Shortcut Source Tool and convert JSON directly into dictionary or list actions using Dictionary Action Builder