ReAct Pattern (Reason + Act)
Agent prompting framework interleaving explicit step-by-step reasoning thoughts with action tool calls and observation inputs.
Mechanism & Definition
A baseline agent prompting and execution framework combining Reasoning and Acting. At each loop iteration, the LLM emits a 'Thought' analyzing current progress, an 'Action' selecting a tool with parameters, and consumes an 'Observation' with the tool's runtime output.