Each domain allows a predefined set of tasks, or intents, to be requested by the user for fulfillment by an app. An intent represents a specific task of which Siri is aware and for which SiriKit expects an integrated iOS app to be able to perform. The Messaging domain, for example, includes intents for sending and searching for messages, while the Workout domain contains intents for choosing, starting and finishing workouts. When the user makes a request of an app via Siri, the request is placed into an intent object of the corresponding type and passed to the app for handling.
In the case of Siri Shortcuts, a SiriKit integration is implemented by using a custom intent combined with an intents definition file describing how the app will interact with Siri.
