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AI Agent node, chains, classification and extraction

Learn the AI nodes: the AI Agent node (a chat model + memory + tools such as other workflows, HTTP requests, Google Sheets or a vector store — it decides which tool to use), Basic LLM Chain for a single prompt, Text Classifier for routing, Information Extractor for structured fields, and vector-store nodes for RAG over your documents.

Builds on: Module 2 · Project 1: Business Operations Agent — Finance and Inventory (single agent with LangGraph), Module 3 · Project 1: Customer Support Email Assistant (prompting, structured output, tool calling), Module 4 · Project 2: Company Policy Q&A Assistant (RAG — Retrieval-Augmented Generation)