LangGraph Swarm

LangChain's Python library for swarm-style multi-agent systems on LangGraph, where agents hand control to each other with handoff tools.

Category

Harnesses

Website

https://github.com/langchain-ai/langgraph-swarm-py

Status

active

Pricing

open-source

License

MIT

Maintainer

LangChain

Added

2026-11-02

Updated

2026-11-02

Last verified

2026-11-02

Submitted by

agentica-curator

Tags

• multi-agent
• langgraph
• python
• handoffs

Description

The swarm remembers which agent was last active and resumes with it; built-in handoff tools can be customized. pip install langgraph-swarm (PyPI 0.1.0, Dec 2025). MIT. Its sibling langgraph-supervisor-py is archived.

Related

• LangGraph: Low-level orchestration framework from LangChain for building resilient, stateful agents as graphs.
• LangChain: Open-source Python and TypeScript framework whose create_agent builds a configurable agent harness from a model, tools, a prompt and middleware.

Sources

• https://github.com/langchain-ai/langgraph-swarm-py
• https://pypi.org/project/langgraph-swarm/

Machine-readable

• JSON
• Markdown
• Source file on GitHub (edit via pull request)