If you wanted even more clues that Apple is preparing to support Siri Extensions besides ChatGPT: 1. Screen Time on iOS and macOS mentions “Extensions with their own app.” 2. iOS 27 and macOS 27 ship with VIP and blocked lists for Siri Extension providers. The blocked list contains a list of apps which Apple will not allow to “donate” a Siri Extension. The OS will also remove an already-enabled Extension from a blocked app, and prevent its invocation. It’s currently empty. The VIP list adds Apple-curated provider candidates. So far, ChatGPT is the only entry. Apple can update both lists through MobileAsset without a full OS update. The company can therefore react in real time if an app ships a Siri Extension that goes rogue. You should be able to find both lists in macOS 27 under: /System/Library/AssetsV2/com_apple_MobileAsset_UAF_FM_Overrides/purpose_auto/6b4ba2562604ccd58e0f97ee9b6e5aaeb9bd4864.asset/AssetData/vipAndBlockedProvider