LangChain Agent An AI agent with tools (search engine and calculator) powered by LangGraph and the Vercel AI SDK. Tech Stack - Framework : Next.js - AI : LangChain.js, LangGraph, AI SDK - Database : PostgreSQL - Package Manager : pnpm Prerequisites - PostgreSQL database - OpenAI API key Setup 1. Clone the Template If the directory is not empty: 2. Remove Git History (Optional) 3. Install Dependencies 4. Setup Environment Variables Create with required variables: - - PostgreSQL connection string - - OpenAI API key for the agent Build Development ---