Modern QA2026"ReAct Pattern" — tiles
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19.3"ReAct Pattern"

What they say: "Does your agent use the ReAct pattern?"

What they mean: The Reason + Act pattern where the agent:

  1. Observes the current state
  2. Thinks about what to do (visible reasoning)
  3. Acts on its decision
  4. Observes the result
  5. Repeats

In our framework:

Observe: playwright-cli snapshot → reads the YAML page summary
Think:   Agent reasons: "I see a login form. I need to enter credentials."
Act:     playwright-cli fill e8 "user@test.com"
Observe: playwright-cli snapshot → checks for validation errors
Think:   Agent reasons: "No errors. Submit the form."
Act:     playwright-cli press Enter

What you should say: "Coding agents naturally follow the ReAct pattern. Each CLI command is an action, and between commands the agent reasons about the output. The skill provides the vocabulary (the command surface), and the agent provides the intelligence (deciding which command to run next based on observations)."