Stagehand on a remote browser

Overview & Result

Stagehand integrates Jev into remote browser sessions running on Browserbase, executing form submissions, navigation hops, and dynamic content extractions with bounded latency. Instead of streaming massive video frames to multimodal models, Stagehand extracts accessibility tree snapshots and uses Jev Choice to pick target interaction elements in under 50ms.

How Jev fits in the loop

1. Launch sandboxed Chromium instance on Browserbase remote infrastructure.
2. Serialize the active viewport into a filtered accessibility tree of interactable nodes.
3. Submit high-level user goals and candidate DOM elements to Jev Choice.
4. Dispatch CDP (Chrome DevTools Protocol) mouse and keyboard events directly on the chosen target.

How to reproduce

1. Inspect author post and reproduction notes.
2. Deploy agent loop and bind Jev decision endpoints.
3. Run test inputs and observe latency and accuracy.

Why this build matters

Combines robust remote cloud browser sandboxing with ultra-fast local DOM decision loops, dramatically accelerating agentic web scraping and RPA.

Reported performance

Cost: ~$0.001

Limitations

• Community observed build; metrics are author-reported.
• Requires third-party dependencies as described in source.

Patterns