langroid/langroid: Multi-Agent LLM Programming Via Task Delegation Architecture — 3.9K Stars

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Langroid is a Python multi-agent framework where each agent is a message-passing entity that delegates tasks to sub-agents, combining tool-calling, RAG, and function-calling in a single composable abstraction. At 3.9K stars it takes a distinctly different architectural approach from LangGraph (graph-as-DAG) and AutoGen (conversation-loop) — framing agents as actors in a delegation hierarchy rather than nodes in a workflow. The explicit multi-agent and function-calling topics make it relevant for teams building complex orchestration pipelines that need clear ownership and handoff semantics.