claude-skill

Open Swe

Name: Open Swe
Author: langchain-ai

An Open-Source Asynchronous Coding Agent

10,740 stars+4★ this week (early data)1,278 forksPythonUpdated 9/21/2026100% free · open source

What it does

An open‑source agent that writes, tests, and iterates code automatically by chatting with Claude, letting you offload routine development tasks.

When to use it

•You need a fast prototype or proof‑of‑concept and want the agent to generate the code for you.
•You have a clear, textual description of a feature (e.g., “add OAuth login”) and want the agent to produce a PR‑ready implementation.
•You want to run a CI‑style “code‑assistant” locally without paying for a hosted service.

Ready-to-paste prompt

open-swe add-task "Implement a Django view that accepts a CSV upload, stores it in S3, and returns a signed download URL"

Heads up: The agent only works with Anthropic’s Claude models; you must have a valid `ANTHROPIC_API_KEY` and be on Python 3.10 or newer, otherwise the worker will exit with an authentication error.

Saves to your device

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

⚡ Runs out of the box

A prompt/skill package — nothing to install beyond adding it to your AI tool.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/b91e2e22-0b75-464c-b0a0-54fc97de8195 && curl -fsSL https://workflowstacks.com/api/skills/b91e2e22-0b75-464c-b0a0-54fc97de8195/claude-skill -o ~/.claude/skills/b91e2e22-0b75-464c-b0a0-54fc97de8195/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How Open Swe works

Codeflow

Free to inspect

Open Swe is a very large Python project (~145k lines across 836 code files, plus 323 test files). You install it into your AI tool with one command; there is nothing to run yourself. Last commit this month, MIT license, has a test suite.

Size

Very large codebase

~145k lines · 836 code files · days to read — use, don't read

Setup

Install as a skill / plugin

Add it to Claude Code (or your AI tool) with one command — 7 skills inside. Nothing to run yourself.

Runs on

Inside your AI tool

Helper scripts use Python · Node.js · Docker

Python 66%TypeScript 29%C 3%JavaScript 1%

Where to start reading

1
README.md
Start here — what it does and how to install it
2
AGENTS.md
The instructions the AI actually follows
3
agent/server.py
Where the program starts running
4
agent/analytics/__init__.py
Inside agent/ — an example of what the AI is told to do
5
examples/github-actions/set-base-snapshot.yml
A worked example — copy this to get going

What's in each folder

agent/Prompts, skills & agent definitions541 files

ui/Frontend / UI456 files

docs/Documentation5 files

examples/Examples you can copy2 files

openwiki/Folder53 files

desktop/Folder37 files

evals/Evaluations & benchmarks12 files

scripts/Helper scripts10 files

READMEHas testsDocumentedCI checksDocker readyExamples includedMIT licenseUpdated this month

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

⚡ Runs out of the box

A prompt/skill package — nothing to install beyond adding it to your AI tool.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/b91e2e22-0b75-464c-b0a0-54fc97de8195 && curl -fsSL https://workflowstacks.com/api/skills/b91e2e22-0b75-464c-b0a0-54fc97de8195/claude-skill -o ~/.claude/skills/b91e2e22-0b75-464c-b0a0-54fc97de8195/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

Quick Actions

Details

Creator

langchain-ai

Language

Python