CrewAI Agent Design Guide

How to design effective agents with the right role, goal, backstory, tools, and configuration.

The 80/20 Rule

Spend 80% of your effort on task design, 20% on agent design. A well-designed task elevates even a simple agent. But even the best agent cannot rescue a vague, poorly scoped task. Get the task right first (see the design-task skill), then refine the agent.

0. How Many Agents Do You Actually Need?

Default to ONE agent. Add more only when the task genuinely splits into work that requires: