kyfx/stagehand：Stagehand 是一个专为 AI 时代设计的浏览器自动化 SDK。

docs: pin quickstart Zod to compatible 4.4 minor (#2922)

Summary

Install zod@~4.4.3 in the v4 TypeScript quickstart to allow patch updates without pulling incompatible minor versions.
Explain why schemas from newer Zod minors can cause extract() TypeScript errors.

Verification

git diff --check passed.
Isolated consumer typecheck with published Stagehand 4.1.0 passes with Zod 4.4.3 and fails with 4.6.1/4.6.2.
Documentation validation suite not run (dependencies not installed in this isolated worktree).

This is a docs-only mitigation; it does not change SDK dependencies or the public schema contract.

Summary by cubic

Pins the TypeScript quickstart’s Zod dependency to zod@~4.4.3 and explains why, so users don’t hit TypeScript errors from newer Zod minor versions when passing schemas to extract(). This is a docs-only change and doesn’t affect the SDK or the public schema contract.

^{Written for commit 0a816a2c08cc0b641a1b0591d6fb0e6bda1ab33e.
Summary will update on new commits.}

Stagehand is the SDK for browser agents.
Read the Docs

What is Stagehand?

Stagehand is the SDK for browser agents. Playwright was built for testing, Stagehand is built for agents. Use familiar APIs, self-healing actions, and network-level security across TypeScript, Python, and Go.

Why Stagehand?

Stagehand gives browser agents an interface built for how they actually work. It combines familiar Playwright-style APIs with self-healing actions, agent-optimized page context, and native support for complex DOM structures like out-of-process iframes and closed Shadow DOMs.

Agents use fewer tokens, recover when websites change, and complete tasks more reliably. With a complete browser driver across TypeScript, Python, and Go, Stagehand delivers the flexibility of AI without sacrificing the speed, control, determinism, reliability, and observability required in production.

1. Familiar APIs

The Playwright-style methods you and your agents already know and love (goto, click, locator, screenshot).

2. Token efficiency as a priority

Stagehand’s hybrid accessibility tree trimming gives your agents exactly what they need to understand the page and nothing more.

3. Faster in production

Stagehand runs as an extension next to the browser, closing the distance and reducing round-trip latency for all actions on the page.

4. Self-healing primitives

Use act, observe, and extract with natural language to automate pages. When sites change, Stagehand detects it and refreshes how the actions happen on the page automatically.

5. Features agents need

WebMCP, clipboard support, self-healing actions, batch commands, deep locators for nested iframes, and OTel support.

Getting Started

Check out our Quickstart Guide for more information:

Example

Here’s how to build a sample browser automation with Stagehand:

import { browserbase, Stagehand } from "@browserbasehq/stagehand";
import { z } from "zod/v4";

const { BROWSERBASE_API_KEY, OPENAI_API_KEY } = process.env;

const browser = await browserbase.launch({
  apiKey: BROWSERBASE_API_KEY,
});

const stagehand = await Stagehand.create({
  browser,
  model: {
    modelName: "openai/gpt-5.4-mini",
    apiKey: OPENAI_API_KEY,
  },
});

// Stagehand's CDP engine provides an optimized, low level interface to the browser built for automation
const [page] = await browser.context.pages();
await page.goto("https://github.com/browserbase");

// Use act() to execute individual actions
await stagehand.act("click on the stagehand repo");

// Use observe() to see what's actionable on the page
const { data: actions } = await stagehand.observe("find the latest PR");

// Use locators for deterministic Playwright-style actions
await page.locator(actions[0].selector).click();

// Use extract() to get structured data from the page
const {
  data: { author, title },
} = await stagehand.extract(
  "extract the author and title of the PR",
  z.object({
    author: z.string().describe("The username of the PR author"),
    title: z.string().describe("The title of the PR"),
  }),
);

See the Python and Go READMEs for equivalent examples.

The same browserbase facade also exposes Browserbase Search and Fetch without launching a browser:

const results = await browserbase.search({
  apiKey: BROWSERBASE_API_KEY,
  query: "browser agent frameworks",
  numResults: 5,
});
const fetchResult = await browserbase.fetch({
  apiKey: BROWSERBASE_API_KEY,
  url: results.results[0].url,
  format: "markdown",
});

Documentation

Visit docs.stagehand.dev to view the full documentation.

Build and Run from Source

Stagehand is a TypeScript, Python, and Go monorepo. We use just to drive pnpm, uv, and go together.

git clone https://github.com/browserbase/stagehand.git
cd stagehand
just install
just generate
just build

Stagehand is best when you have an API key for an LLM provider and Browserbase credentials. Export them so they’re available on process.env:

export OPENAI_API_KEY="your-openai-api-key"
export BROWSERBASE_API_KEY="your-browserbase-api-key"

Then run any of the scripts in packages/sdk-ts/examples:

just example act # runs packages/sdk-ts/examples/act.ts

See CONTRIBUTING.md for the full TypeScript, Python, and Go setup.

Contributing

[!NOTE] We highly value contributions to Stagehand! For questions or support, please join our Discord community.

We’re focused on improving reliability, extensibility, speed, and cost in that order of priority. If you’re interested in contributing, bug fixes and small improvements are the best way to get started. For more involved features, we strongly recommend reaching out to Miguel Gonzalez or Paul Klein in our Discord community before starting to ensure that your contribution aligns with our goals.

Acknowledgements

We’d like to thank the following people for their major contributions to Stagehand:

License

Licensed under the MIT License.

“Stagehand” is a trademark of Browserbase, Inc.