A digital assistant supported across devices such as smartphones, tablets, personal computers, wearable computing devices, game consoles, and the like includes an end-to-end user experience client that interfaces with extensions to applications and/or remote cloud-based services so that user experiences, content, or features can be integrated with the digital assistant and rendered as a native digital assistant user experience. The digital assistant is configured to perform as an active participant in a user experience from its initiation to its conclusion (i.e., from “end-to-end”) by determining the user's intent, performing tasks and actions, providing status, and interacting with the user as needed. The digital assistant utilizes proximity sensing so that its end-to-end participation in a user experience may span different physical locations. Such capability can facilitate the performance of location-specific actions including authenticating the user to gain access to locations, information, or services that would be restricted from non-authenticated users.