Build AI agents with Lang

Short summary

LangChain agents use createAgent to wire a model with tools defined via Zod schemas, executing them in a loop until returning a final answer. The tutorial walks through building a support triage agent that looks up customer data and invoices, then compares LangChain against Vercel AI SDK and OpenAI Agents SDK. Includes complete runnable code examples, recursion limits, and streaming patterns.

• •createAgent takes a model, Zod-defined tools, and system prompt to build autonomous agents
• •Agents loop: model either returns final text or calls tools, which re-enter the loop with results
• •LangChain best fits apps combining document loaders, retrievers, and agents in one ecosystem

Generated with AI, which can make mistakes.