1937983507/ai-tourism

Based on the README, here's the technical summary: --- The system uses **SSE streaming** to deliver real-time itinerary text alongside structured JSON route data for map visualization. **LangChain4j agents** orchestrate multi-turn conversations via `MessageWindowChatMemory` (backed by Redis/MySQL), while **MCP tools and Function Call tools** register centrally through `ToolManager` with dynamic hot-swapping. Performance optimization leverages **Caffeine caching** for AI Service instances (28.4% latency reduction) and tool results (399μs avg response), combined with **Prometheus+Micrometer** metrics collection tracking requests, token usage, and cache hit rates across the full request lifecycle.