NSExtension NSExtensionAttributes IntentsRestrictedWhileLocked IntentsRestrictedWhileProtectedDataUnavailable IntentsSupported GemtextToHTMLIntent GemtextToMarkdownIntent GetBodyIntent GetMetaIntent GetStatusIntent MakeRequestIntent OpenURLIntent NSExtensionPointIdentifier com.apple.intents-service NSExtensionPrincipalClass $(PRODUCT_MODULE_NAME).IntentHandler