AI Travel Planning System
A multi-agent travel planner where the agents have to agree with each other.
Four agents, flight, hotel, itinerary and response, coordinated through LangGraph, with agent memory in PostgreSQL and live data from AviationStack and Tavily.
The agents aren't the interesting problem. The interesting problem is that a flight agent and a hotel agent can each return a perfectly defensible answer and together produce an itinerary that's impossible, and the coordinator has to catch that without an LLM call for every pair of facts.