I Built a WhatsApp Booking Agent — The Hard Part Wasn’t AI

The author built a WhatsApp booking agent, GraceSoft Sentinel Concierge, which evolved from a simple chatbot to a stateful booking orchestration system. The project required a lean stack, including Node.js, TypeScript, Prisma, MySQL, Redis, and Google Calendar API. The system now handles FAQs, booking intents, and escalates to humans when necessary. To deploy, use Docker and Railway. This project showcases the challenges of building a production-ready system.