Architect Alexa voice control for Peloton equipment: APIs and components

Design the system that lets a rider control a Peloton exercise machine by voice through Alexa. Specify the main APIs, sketch the architecture, and explain the role of each component. ```hint Sort commands by risk Not every voice command carries the same stakes. Ask what happens if each one is misheard or arrives a few seconds late, and let the answer shape how that command travels through the system. ``` ### Clarifying Questions - Is Alexa built into the Peloton's screen, or does the rider speak to a separate Echo device in the same room? - Which actions are in scope: finding and starting classes, in-workout controls such as resistance or speed, reading back stats, or all three? - Am I designing as Peloton on Amazon's public Alexa developer tools, or as Amazon with access to Alexa's internals? - Should voice be allowed to change anything that moves the rider, such as treadmill belt speed, or only controls that cannot cause harm? ### What a Strong Answer Covers - A scoped set of voice use cases and a justified choice between a cloud skill on a nearby speaker and Alexa built into the machine - The end-to-end path from spoken request through speech recognition and intent matching, the skill backend, Peloton's cloud and the machine, with a latency budget - Concrete API definitions: the intent and slot model, cloud command and query endpoints, account linking, and the push channel to the machine - Safety and reliability for physical commands: confirmation, bounded changes, command expiry, idempotency and offline machines - Privacy, households with several riders, and the metrics that show whether voice control works ### Follow-up Questions - Mid-climb, a rider says "make it harder" and the bike's connection drops for a few seconds. What does each component do, and what does the rider hear? - How would the design change if Alexa moved from a nearby Echo into the Peloton screen itself? - Which metrics would tell you that a command type should be pulled or redesigned?