From Concept to Production: Building an AI Training Coach in Seven Days

Claude API combined with Garmin fitness data enables Stride Mate to deliver personalized training advice grounded in real athletic metrics. The development journey reveals critical decisions in rapid prototyping—ditching vector embeddings for precise SQL queries and leveraging established APIs like Strava for reliable data sync. This seven-day sprint demonstrates that modern AI and API ecosystems now allow indie developers to launch production-grade fitness coaching with minimal infrastructure investment.