To integrate Siri capabilities in your app, you should add an extensions as you would do while creating an iOS 10 Widget (old Today View Extension) or a custom keyboard.

Adding capability

1- In the project settings, select your iOS app target and go to Capabilities tab

2- Enable the Siri capability

Adding the extension

1- Go to File -> New -> Target...

2- Select iOS -> Application Extension from the left pane

3- Double-click Intents Extension from right

According to Apple:

Intents Extension template builds an Intents extension that allows your app to handle intents issued by system services like Siri and Maps.

4- Choose a name, and be sure to check "Include UI Extension"

By doing this steps, two new targets (Intents Extension and UI Extension) are created, and by default they contain Workout Intent code. For different types of Siri requests, see Remarks.

Note

Anytime you want to debug your extension, just select the Intent scheme from the available schemes.

Note

You can't test SiriKit apps in the Simulator. Instead, you need a real device.