Stagehand SDK for AI browser automation [ALPHA]. This API allows clients to execute browser automation tasks remotely on the Browserbase cloud. All endpoints except /sessions/start require an active session ID. Responses are streamed using Server-Sent Events (SSE) when the `x-stream-response: true` header is provided. This SDK is currently ALPHA software and is not production ready! Please try it and give us your feedback, stay tuned for upcoming release announcements!