title: How can I add a custom command to Siri?
body: <p>I want to develop an app that works with a Siri command such as "send tweet".</p>
  
  <p>In brief, Siri should send data to my app, and my app process this data. After that, my app returns to Siri.</p>
  
  <p>How can I do this?</p>