Open SWE

LangChain's open-source asynchronous coding agent built on LangGraph: plans, executes, and opens PRs for software tasks end to end - an open implementation of the cloud SWE-agent product shape.

View source on GitHub

Key takeaways

• 01

  Async 'issue in, PR out' is the emerging product shape for coding agents

• 02

  Built on graph orchestration with human checkpoints

Flows built on this research

Agent Architecture

Design the Agent-Computer Interface (ACI)

Apply SWE-agent's key finding: agents perform dramatically better when their commands, viewers, and feedback are designed for models, not humans.

5 steps · 90-120 minutes

Agent QA & Security

Release Gates for Agent-Generated Code

Put agent output through a real merge gate: automated review, tests, security scans, and human sign-off proportional to risk.

4 steps · 60-90 minutes