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AI / CrewAI Interview Questions

How do the or_ and and_ logical operators work with @listen and @router?

CrewAI Flows support combining multiple trigger conditions using logical operators, letting a single method respond to more complex combinations of prior events.

  • or_: triggers the listening method when any of the specified conditions are met
  • and_: triggers the listening method only when all of the specified conditions are met
  • Both operators can be used with @start, @listen, or @router to build more sophisticated triggering logic

This lets a Flow express conditions like running once either step A or step B finishes, or running only after both step A and step B have completed, without manually tracking completion state yourself.

What does the or_ operator trigger on?
What does the and_ operator require before triggering?

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