Karthik22296/WhatsApp-Holiday-Concierge — reverse-engineered prompt

Build me a production ready WhatsApp concierge bot for holiday rental guests. Guests should be able to message a WhatsApp number and ask normal questions about the villa, like WiFi, check in, transport, dining, house rules, and schedules, and the bot should reply instantly using a property knowledge base plus any upcoming Google Calendar events.

I want guest access controlled so only approved phone numbers can use it. Add simple API endpoints so an admin can manage guests, send a broadcast message to all guests, test chat messages, refresh or view the knowledge base, and check app health. It should support Twilio WhatsApp, Google Gemini by default, and also let me switch to Claude through configuration without changing code.

Please make it clean and ready to run locally and in Docker, with sensible logging, error handling, Swagger docs for testing, database storage, environment based secrets, and a sample property knowledge file I can edit. Include enough setup notes so I can plug in Twilio, AI, Google Calendar, and run it.