Six AI Agent Frameworks Dominate GitHub as Developers Race to Ship Production Systems

The open-source AI agent ecosystem has fractured into distinct camps—Python frameworks for rapid multi-agent orchestration, TypeScript-first systems for production startups, and enterprise consolidation around Microsoft's new direction—as GitHub repositories for agent development attract hundreds of thousands of stars and billions of orchestrated workflows annually. The six frameworks featured most prominently by developers seeking to accelerate agent development—LangGraph, CrewAI, AutoGen, PydanticAI, Dify, and Mastra—represent a maturing market where language choice, deployment model, and production durability increasingly shape technology adoption rather than raw capability.