Building an AI-First Browser Automation Framework In TypeScript - Paul Klein, Browserbase

Learn how to build an AI-first browser automation framework in TypeScript with insights from Paul Klein. In this video, Paul Klein, founder of Browserbase (https://www.browserbase.com/), shares lessons learned from developing Stagehand, a natural-language-driven browser automation tool, discusses challenges in creating model-agnostic AI frameworks, and offers advice on building maintainable TypeScript frameworks. He also explains the importance of patience and user feedback in open source development.

Browserbase helps AI use the web by providing serverless browser infrastructure for AI agents and applications to autonomously read, write, and perform tasks on the web.

TypeScript AI Conference is the first event dedicated to TypeScript AI developers. Its inaugural edition took place on November 6, 2025, in San Francisco and online.

Mastra is an open-source TypeScript framework designed for building and shipping AI-powered applications and agents with minimal friction. It supports the full lifecycle of agent development—from prototype to production. You can integrate it with frontend and backend stacks (e.g., React, Next.js, Node) or run agents as standalone services. If you’re a JavaScript or TypeScript developer looking to build an agentic or AI-powered product without starting from first principles, Mastra provides the scaffolding, tools, and integrations to accelerate that process. Learn more: https://mastra.ai

00:00 Introduction
00:44 Lessons learned building a browser automation framework
06:39 Lessons learned building a framework for AI (Stagehand and AI framework)
09:30 Lessons learned building a good TypeScript framework

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