Title's basically the whole question. I'm writing an SMS/Call Reporting extension (ILClassificationUIExtensionViewController). My goal is to keep everything on device and not use the built-in SMS/network reporting. To that end, I'm trying to write to a file in the App Group container from the classificationResponse handler. I'm getting Error 513: "You don’t have permission to save the file “classification_log.txt” in the [app group container folder]". I haven't been able to find much in the documentation on whether this behavior is enforced in classificationResponse handlers. Apple's barebones page on "SMS and Call Spam Reporting"[1] says "the system always deletes your extension’s container after your extension terminates," but that doesn't answer whether you can write to an App Group container. I haven't been able to find that answer elsewhere. ChatGPT and Gemini are both very sure it can be done. Any thoughts? [1] https://developer.apple.com/documentation/identitylookup/sms-and-call-spam-reporting