Wraps the Transition API to bring endurance training data into Claude. You get tools for pulling today's workout, viewing your weekly plan, requesting plan adaptations, checking fitness metrics like CTL/ATL/TSB, and chatting with an AI coach. Resources expose your athlete profile, recent activities, and performance thresholds. One endpoint generates free workouts without auth if you just want a quick run or swim session. Requires a Transition account and API key for personalized features, though the workout generator works standalone. Built for runners, cyclists, swimmers, and triathletes who want training intel during conversations.