Am I using UIDocumentInteractionController wrong? It shows a share sheet with a 5 byte file, but extensions end up receiving no input items. Logs this:

Could not instantiate class NSURL. NSCocoaErrorDomain Code=4864 “The URL archive of type “public.url” contains invalid data.”

1 hour later: Solution: use UIDocumentPickerViewController for exporting instead. Close enough 🤷‍♂️