As a Whoop member working with an AI coach, I want a closed training loop: I tell my coach my goal (e.g. increase my vertical jump to dunk), the coach generates structured workouts, and I execute them in the Whoop app. Whoop tracks strain, HR, and recovery against the plan, and my coach reads the results back through the API to adjust. Today the API is read-only, so plans live outside Whoop and completion data never flows back. Request: write endpoints (or a training-plan object) letting authorized apps create structured workouts that appear in the Whoop app as executable sessions, with completion data flowing back through the existing read API.