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🔄 ReAct Pattern

Reasoning and Acting: The synergy that makes AI agents more capable

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What are AI Agents?

Introduction to ReAct

🎯 What is ReAct?

ReAct (Reasoning + Acting) is a paradigm that combines verbal reasoning traces with task-specific actions in an interleaved manner. This approach allows language models to generate reasoning steps while interacting with external environments to gather additional information.

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Key Insight

ReAct bridges the gap between reasoning and acting, enabling agents to dynamically adjust their plans based on observations from the environment.

🔄 The ReAct Cycle

ReAct operates in a continuous loop alternating between internal reasoning and external actions.

1
Thought

Generate reasoning step explaining current understanding and next action

2
Action

Execute specific action (search, calculate, lookup, finish)

3
Observation

Receive feedback from environment based on action taken

Repeat

Continue cycle until task is complete

✅ Advantages

  • Interpretable reasoning traces
  • Dynamic information gathering
  • Error recovery through reasoning
  • Handles complex multi-step tasks

📊 Use Cases

  • Question answering with research
  • Interactive problem solving
  • Fact verification tasks
  • Multi-tool agent systems

🆚 ReAct vs Other Approaches

Chain of Thought

Pure reasoning without external actions

Limited to model's knowledge

Action-Only

Direct action selection without reasoning

No interpretability

ReAct

Combines reasoning with actions

✓ Best of both worlds