Browser use agent with Chrome Dev Tools MCP and Langchain

Small LangGraph/LangChain agent that drives the browser through the Chrome DevTools MCP client. Uses DeepSeek for the LLM, Ollama embeddings for memory, and stores state in SQLite/Chroma under ./mem.

What you need

• Python 3.13+
• uv CLI (pip install uv)
• Chrome installed (for the MCP tool)
• Ollama running locally with the nomic-embed-text model, or change the embedding provider in cu/utils/__init__.py

Setup and run

1. Copy .env_example to .env and set at least DEEPSEEK_API_KEY. LANGSMITH_API_KEY is optional; OPENROUTER_API_KEY is only needed if you switch providers.
2. From the repo root run ./run.sh (Linux/Mac) or ./run.ps1 (Windows). The script will create .venv with uv venv --python=3.13 if missing, install requirements.txt, and start python -m cu.agent.
3. Type your requests in the REPL; type exit to quit.

Notes

• Set STORAGE_LOCATION in .env if you want memory/checkpoints in a different folder.
• If uv is missing, install it first (pip install uv) before running the scripts.