LangGraph Fundamentals: Modeling Agents as State Machines

Agentic AI 20 min min read Updated: Feb 26, 2026 Intermediate

LangGraph Fundamentals: Modeling Agents as State Machines in Agentic AI

Intermediate Topic 2 of 8

LangGraph Fundamentals: Modeling Agents as State Machines

Why graphs beat long prompts

Graphs enforce structure: you can see what state you’re in, what comes next, and what conditions trigger transitions.

Typical states

  • Interpret goal
  • Plan
  • Call tool
  • Summarize
  • Verify
  • Finalize

Guard conditions

Guards prevent bad transitions: “only finalize if constraints are satisfied.”

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