iOS 8.4: Looks like Apple added a Keychain App Extension

Stop me if this was already in iOS 8, but I haven’t seen it until the recent 8.4 update that brought Apple Music: when I tapped the 1Password button to log into my Simple app, I noticed a “Keychain” extension is now available. It isn’t possible to disable this extension, which i believe means it is from Apple.

It didn’t do anything for me since I store all my Logins in 1Password, and I can’t find other apps that use it yet. Anyone have more experience with this extension?