{"service":"Celine - Chat Assistant for Upstyles","status":"operational","version":"1.0.0","endpoints":{"health":"/api/health","chat":"POST /api/chat","metrics":"/api/metrics","conversations":"/api/users/:userId/conversations","messages":"/api/users/:userId/conversations/:sessionId/messages"},"documentation":"https://github.com/upstyles/chat-assistant-ai","features":["🤖 AI-powered chat using Hugging Face","💅 Nail salon knowledge base","📅 Answers date/time questions","🔥 Firebase Firestore integration","⚡ 4-tier smart response system","🛡️ Rate limiting: 100 req/15min","📊 Request metrics tracking"],"example":{"curl":"curl -X POST https://chat-assistant-ai--upstyles-pro.us-east4.hosted.app/api/chat -H 'Content-Type: application/json' -d '{\"userId\":\"test\",\"message\":\"What are your hours?\"}'"}}