### Install the LangGraph Python SDK ### Wire CopilotKit middleware into your graph Programmatic control (`copilotkit.runAgent`, `agent.subscribe`, `agent.addMessage`) drives runs through the same agent your chat UI uses, so the backend wiring is the same one-line `CopilotKitMiddleware` setup. For the headless `useInterrupt` pattern, also use LangGraph's native `interrupt(...)` inside a graph node and resume with `forwardedProps: { command: { resume, interruptEvent } }` from the frontend.