LangGraph Debugger

LangGraph Debugger

LangGraph Debugger is a developer tool for building, running and observing stateful execution graphs. It pairs a TypeScript/React frontend with a Python ASGI backend that compiles and executes state graphs while exposing debug hooks (breakpoints, state injection, progress events) to the UI.

This repository contains two main projects:

• client/ — the web-based UI (React + TypeScript + Vite).
• server/ — Python backend with the execution engine and websocket API.

See the docs/ folder for full documentation and setup instructions:

• docs/index.md — documentation entry point.

Quick start (development)

Client

cd client
npm install
npm run dev

Server

cd server
python -m venv .venv
. .venv/bin/activate   # on Windows: .venv\Scripts\Activate.ps1
pip install -r requirements.txt
python -m src.dev

Contributing

See docs/contributing.md for contribution guidelines and PR checklists.