ReAct: Teaching AI to Reason and Act
Learn the reason-act-observe loop behind agents that plan, use tools, read results, and recover when the world disagrees with their first answer.
3 sections ยท 6 lessons
Course outline
Agent Loop
- Reasoning Alone Is Brittle
- Thought Action Observation
- Repair a Broken Web Task
Grounded Decisions
- Actions Gather Evidence
- Sparse Reasoning Beats Chatter
- Audit a Search Trace
Modern Agents
- Tools Are Environments
- Benchmarks Reveal Agent Gaps
- Evaluate a Tool-Using Agent