Reasoning and Acting
The **ReAct** (Reason + Act) pattern is the gold standard for agentic behavior. In LangGraph, you implement this by creating a loop between an LLM node and a Tool node. The agent "Reasons" about the next step, "Acts" by calling a tool, and then "Observes" the result before repeating the process.
Improving Decision Quality
The transparency of LangGraph allows you to inspect the reasoning chain at every step. This makes it easier to identify and fix "Logical Loops" or "Hallucinations" in the agent's behavior. It is the most robust and widely used pattern for building high-performance autonomous systems.
Conclusion
Logic drives results. By mastering the ReAct pattern in LangGraph, you build agents that are persistent and thoughtful, capable of navigating complex problem spaces to find accurate and reliable solutions.