Agent Architectures (ReAct, Plan-and-Execute)

Summary

Patterns for how an LLM reasons and acts iteratively — ReAct interleaves reasoning and tool calls step by step, Plan-and-Execute plans a full sequence upfront then executes it.

• 1Read the original ReAct paper's core loop: thought, action, observation, repeat.
• 2Implement a minimal ReAct-style agent from scratch before relying on a framework.
• 3Compare ReAct's flexibility against Plan-and-Execute's predictability for a specific task.