agent-browser overview

Open source (Apache-2.0) by Vercel Labs — github.com/vercel-labs/agent-browser (npm `agent-browser`). Browser-automation CLI built for AI coding agents to verify changes in a real browser. A native Rust CLI talks to a Rust daemon that drives Chrome over the Chrome DevTools Protocol (CDP). Output is optimized for token efficiency: accessibility-tree snapshots with stable element references (`@e1`, `@e2`) for deterministic selection instead of brittle CSS/XPath. Ships 50+ commands (navigation, forms, screenshots, network monitoring, storage, video recording, streaming, profiling, diffing) plus session/auth-state preservation and proxy support. Install: `npm install -g agent-browser` (or `brew install agent-browser`), then `agent-browser install` to fetch Chrome and e.g. `npx agent-browser open example.com`. Marketed for Claude Code, Cursor, Copilot, Codex, and Gemini; also supports AgentCore / Browserbase / Browserless providers.