Installation and Quickstart

Installation and Quickstart

Windows PowerShell / VS Code

py -3.12 -m venv .venv-langgraph
.\.venv-langgraph\Scripts\python.exe -m pip install --upgrade pip
.\.venv-langgraph\Scripts\python.exe -m pip install -r requirements_langgraph_example.txt
.\.venv-langgraph\Scripts\python.exe .\langgraph_example_multi_agents.py --list
.\.venv-langgraph\Scripts\python.exe .\langgraph_example_multi_agents.py --self-test

Run these from the extracted repository root. If your terminal already has a suitable Python 3.11–3.13 interpreter, adapt the virtual environment command accordingly.

macOS / Linux

python3 -m venv .venv-langgraph
source .venv-langgraph/bin/activate
python -m pip install -r requirements_langgraph_example.txt
python langgraph_example_multi_agents.py --self-test

No model API needed

Default topic runs require installed libraries but no OpenAI key. The --with-llm flag or one of the two model topics explicitly enables paid remote calls. No GPU is required for orchestration.

See Troubleshooting for environment and launcher errors.