I might be interested in making one, but I don’t see an API, spec, etc.
Eg can my theme change based on location, date, or time? Does it know gyro/compass orientation, or only something like degrees off from “normal”? How exactly do animated or angle dependent themes work? Can it incorporate data from an app? What are the elements & their sizes? What icons can be customized? Can one process an to customize it to fit the theme, or do they have to be pre bundled? Etc…