Open sourcePython · ≈11k stars · MIT
Open SWE
LangChain's open-source asynchronous coding agent, from issue to pull request.
Open SWE is an open-source software factory built on LangChain's Deep Agents and LangGraph. It investigates a codebase, implements changes in persistent per-thread Linux sandboxes, validates them and delivers pull requests; it also reviews PRs, learns repository review preferences, monitors CI and can be triggered from a dashboard, GitHub issues and PR conversations, Slack or Linear. The README notes it is under active development, not accepting external contributions, and that deploying as-is requires Managed Deep Agents.
The team behind it
San Francisco, CA · Est. 2022
The de-facto standard toolkit for building LLM applications and agents.
LangChain makes the LangChain framework and LangGraph, the low-level orchestration standard for stateful, controllable agents, plus the LangSmith platform for tracing, evaluating and monitoring them in production.
~$75M raised
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Small, composable agent skills for real engineering work.
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Connections
Relations from the Harness Hub knowledge graph, as charted in the State of Harness reports.
Maintained by · 1
- LangChainStartup
Sources
Verified Oct 29, 2026