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/playwright-dev

@08a37f2
by microsoftmicrosoft/playwright97k stars
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Explains how to develop Playwright - add APIs, MCP tools, CLI commands, and vendor dependencies.

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Use this Skill: https://skilld.dev/gh/microsoft/playwright/playwright-dev

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webkit-safari-version.md

≈227 tokens on demand. Your agent reads this file only when SKILL.md points to it.

Updating WebKit Safari Version

The Safari version string used in the WebKit user-agent is declared in one place:

packages/playwright-core/src/server/webkit/wkBrowser.ts — BROWSER_VERSION constant (line ~35).

const BROWSER_VERSION = '26.4';
const DEFAULT_USER_AGENT = `Mozilla/5.0 ... Version/${BROWSER_VERSION} Safari/605.1.15`;

Steps to update

  1. Find the latest stable Safari version — search site:developer.apple.com "Safari X.Y Release Notes" or check the Safari Release Notes index. The highest numbered entry that is not a Technology Preview is the current stable release.

  2. Update BROWSER_VERSION in wkBrowser.ts.

  3. Run lint to update any generated files that embed the version:

    npm run flint

Source: SKILL.md on GitHub

Third-party checks

1 warning16d5 checks · Risk SAFE
  • Gen Agent Trust Hub16d

    This skill provides a detailed set of development guides for the Playwright project, covering API implementation, tool creation, and architectural overview. It includes instructions for standard development tasks such as building, testing, and dependency management. While the skill describes the creation of tools that interact with untrusted agent input, it emphasizes the use of validation schemas to manage these boundaries.

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    Risk: LOW · No issues

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  • ZeroLeaks5mo

    Score: 93/100 · 2 sections analyzed

Provenance

Signed by skilld at 08a37f2. This ties the file your Agent reads to that commit on GitHub. It does not review the instructions.

Last checked against GitHub yesterday.

Activeupdated 4 months ago

Topics

  • Testing
  • CLI
  • MCP
  • playwright
  • browser-automation
  • api-development
  • vendor-dependencies
  • webkit
  • monorepo

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What it does

Explains how to extend Playwright itself — adding client/server APIs, MCP tools, CLI commands, and vendor dependencies. Targets contributors to the Playwright monorepo, not end users building test suites.

Generated from the current SKILL.md.

Frequently asked

What does this skill help me do?
This skill explains how to develop Playwright itself — adding APIs, MCP tools, CLI commands, and managing vendor dependencies. It's for contributors working on the Playwright codebase, not for using Playwright as a testing library.
Does this cover the monorepo structure and build commands?
Yes. It references CLAUDE.md for monorepo structure, build/test/lint commands, and coding conventions.
Can I learn how to add new APIs or MCP tools to Playwright?
Yes. The skill includes detailed guides on adding and modifying APIs, implementing client/server logic, and adding MCP tools and CLI commands.
Does this cover WebView or WebKit backend development?
Yes. It includes guides for WebView (iOS Safari) backend work and updating WebKit Safari versions.
Is this for using Playwright as a test framework, or for developing Playwright itself?
This is for developing Playwright itself. If you want to write tests with Playwright, you need a different resource.

Generated from the current SKILL.md. These answers refresh after source changes.