playwright-dev

# Playwright Development Guide See [AGENTS.md](../../../AGENTS.md) for monorepo structure, build/test/lint commands, and coding conventions. ## Detailed Guides - [Library Architecture](library.md) — client/server/dispatcher structure, protocol layer, DEPS rules - [Adding and Modifying APIs](api.md) — define API docs, implement client/server, add tests - [MCP Tools and CLI Commands](tools.md) — add MCP tools, CLI commands, config options - [Vendor Dependencies & Bundling](vendor.md) — utilsBundle, coreBundle, babelBundle; adding vendored npm packages; DEPS.list; `check_deps` - [Updating WebKit Safari Version](webkit-safari-version.md) — update the Safari version string in the WebKit user-agent - [WebView (iOS Safari) Backend](webview.md) — `webkit/webview/` against stock Mobile Safari; provisional-target pause/resume; what's upstream vs Playwright patches; local + CI test setup - [Bisecting Across Published Versions](bisect-published-versions.md) — reproduce regressions side-by-side from npm and diff `node_modules/playwright/lib/` between versions - [Dashboard](dashboard.md) - the UI powering the "playwright cli show" command, and how to work on it