Browser Tools SDK: Open-Source TypeScript Package for AI Browser Automation

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Libretto has open-sourced Browser Tools SDK, a lightweight TypeScript package that enables AI agents to control a real browser with minimal setup. The SDK exposes just six tools, with two core ones — a context-efficient snapshot tool and a raw Playwright code executor — handling most agent tasks. In benchmarks across 26 live-site tasks, it matched the best pass rate at 24/26 while costing roughly 55% less per successful task than the nearest competitor. The package supports AI SDK and Pi frameworks out of the box, with more integrations planned, and works with multiple browser infrastructure providers or a local Chromium instance. Released under the MIT license, the project is seeking community feedback via its documentation site and Discord channel.

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