Stagehand bridges the gap between deterministic browser automation and AI-powered web interaction. Built by Browserbase, its current SDK centers on browser-agent primitives — act(), extract(), observe(), and agent() — with a CDP-based execution layer and integrations for Playwright, Puppeteer, Selenium, and Browserbase cloud browsers.
The core primitives let developers decide exactly where to use AI: act() performs browser actions from instructions, extract() returns structured data from pages with schema validation, observe() identifies available actions before committing to them, and agent() can run longer multi-step browser tasks when autonomy is appropriate.
Under the hood, the v3 architecture uses a lower-level browser automation engine and Browserbase infrastructure rather than depending on a simple Playwright-plus-vision model. Action caching and self-healing patterns help repeated workflows become more deterministic while still allowing AI to recover from page changes.
The framework supports major model providers through the Vercel AI SDK and is particularly valuable for teams building browser agents, structured web extraction, test automation, and production workflows against sites that change frequently or lack stable APIs.
