How to build an agent with CrewAI

Use roles to separate responsibilities

CrewAI organizes work around agents, tasks, and a crew. Give each agent one responsibility and only the tools needed for that responsibility.

from crewai import Agent, Task, Crew

researcher = Agent(
    role="Release researcher",
    goal="Find verified changes in the selected repositories",
    backstory="You cite sources and never invent release details.",
    tools=[repository_search],
)

Turn the outcome into a task

Tasks should state the expected output and the evidence required. This makes delegation easier to inspect and test.

research = Task(
    description="Review releases from the last seven days.",
    expected_output="A sourced list of notable changes.",
    agent=researcher,
)

crew = Crew(agents=[researcher], tasks=[research])
result = crew.kickoff()

Control the crew

More agents do not automatically produce better work. Limit delegation depth, set budgets, isolate credentials by role, and require approval before any write operation.