Quick answer: Multi-agent conversation framework from Microsoft Research.
AutoGen is a multi-agent conversation framework developed by Microsoft Research that enables developers to build applications where multiple AI agents collaborate to solve complex tasks. Rather than relying on a single AI model, AutoGen orchestrates interactions between agents with different roles, capabilities, and conversation patterns. Each agent can be configured with specific instructions, tools, and behaviors, allowing them to communicate, debate, and cooperate to reach solutions. The framework handles agent communication, manages conversation flow, and supports both code execution and human-in-the-loop workflows. AutoGen is open-source and designed for researchers and developers building sophisticated AI systems that require multi-perspective problem-solving and iterative refinement.