feat: add unified Redis client and Langfuse v3 integration #7
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Redis Infrastructure: - Add unified Redis client (src/core/redis.ts) with singleton pattern - Add MessagePack encoding for 30% smaller cache values - Migrate embeddings.ts and rate-limit.ts to unified client - Add Redis health checks to /health and /health/ready endpoints - Add graceful shutdown with proper dependency ordering Redis Services: - Add CacheService with TTL, versioning, and batch operations - Add SessionService for user session management - Add AnalyticsService with HyperLogLog and leaderboards Langfuse v3 Integration: - Add SafeCallbackHandler for non-blocking error handling - Configure Langfuse Docker service with PostgreSQL - Update chat-agent to use safe callback wrapper - Add graceful degradation when Langfuse is unavailable Docker Updates: - Add Redis configuration with production settings - Add Langfuse v3 service with dedicated database - Add init script for Langfuse PostgreSQL database Tests: - Update health tests with Redis mocking - Update chat tests with rate limit mocking - All 128 tests passing 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
## Backend - Fix streaming to use LangGraph streamEvents() API properly - Add extractTextContent() helper for OpenAI/Anthropic format compatibility - Add comprehensive streaming tests (36 total tests) - Integrate Langfuse v3 tracing with SafeCallbackHandler ## Frontend - Add Chat components: MessageList, MessageInput, MessageParts - Implement SSE streaming with typed ContentBlock parts - Use React 19 patterns: useActionState, useFormStatus - Add ErrorBoundary with dev-mode error details - Full test coverage with Vitest and MSW ## Shared - Add chat-ui.ts types for ContentBlock, MessageData - Export streaming event types 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
/healthand/health/readyendpointsChanges
Redis Infrastructure
src/core/redis.ts- Singleton Redis client with MessagePack encodingembeddings.tsandrate-limit.tsto unified clientRedis Services
CacheService- TTL, versioning, batch operationsSessionService- User session managementAnalyticsService- HyperLogLog for unique visitors, leaderboardsLangfuse v3
SafeCallbackHandler- Wraps callbacks to prevent errors from blocking LLM callsDocker
docker/redis.conf- Production Redis settingsdocker/init-langfuse-db.sql- Langfuse database initTest plan
🤖 Generated with Claude Code