playwright-dev

SKILL.md

Guide for extending Playwright with new APIs, MCP tools, CLI commands, and vendored dependencies.

Covers monorepo structure, build/test/lint workflows, and coding conventions via CLAUDE.md reference

Includes detailed walkthroughs for implementing client/server APIs, writing tests, and modifying protocol layers

Explains how to add MCP tools, CLI commands, and configuration options within the Playwright ecosystem

Documents the vendoring process for bundling third-party npm packages into playwright-core or playwright

Playwright Development Guide

See CLAUDE.md for monorepo structure, build/test/lint commands, and coding conventions.

Detailed Guides

Library Architecture — client/server/dispatcher structure, protocol layer, DEPS rules

Adding and Modifying APIs — define API docs, implement client/server, add tests

MCP Tools and CLI Commands — add MCP tools, CLI commands, config options

Vendor Dependencies & Bundling — utilsBundle, coreBundle, babelBundle; adding vendored npm packages; DEPS.list; check_deps

Updating WebKit Safari Version — update the Safari version string in the WebKit user-agent

Bisecting Across Published Versions — reproduce regressions side-by-side from npm and diff node_modules/playwright/lib/ between versions

Dashboard - the UI powering the "playwright cli show" command, and how to work on it