Built at the Code It Up 6.0 hackathon: a laboratory management platform powered by 4 coordinated AI agents orchestrated with LangGraph, handling tasks like inventory checks and report generation in real time. Implemented real-time SSE streaming so users see agent reasoning as it happens, plus JWT + MFA authentication and role-based permissions for lab staff vs admins. Stack: NestJS, React, PostgreSQL, LangGraph, OpenRouter