CrewAI: Multi-agent orchestration framework for AI agents

CrewAI is a Python framework for orchestrating multiple autonomous AI agents that collaborate to complete complex tasks through role-based interaction patterns. The framework implements a hierarchical task delegation system where agents are instantiated with defined roles, goals, and backstories, then assigned to specific tasks that are coordinated by a crew orchestrator. Each agent operates as an independent decision-making entity powered by large language models, with the crew managing inter-agent communication, task sequencing, and result aggregation. The architecture supports both sequential and hierarchical process flows, allowing agents to work in predefined pipelines or dynamically delegate subtasks based on their specialized capabilities. The framework abstracts the complexity of multi-agent coordination by providing a declarative interface for defining agent behaviors and task dependencies without requiring manual prompt engineering or state management.