Explains how to add and debug playwright MCP tools and CLI commands.
View on GitHubFebruary 3, 2026
Select agents to install to:
npx add-skill https://github.com/microsoft/playwright/blob/b71c229a80aad2d99747b41a6a5474ed1bc374c1/.claude/skills/playwright-mcp-dev/SKILL.md -a claude-code --skill playwright-mcp-devInstallation paths:
.claude/skills/playwright-mcp-dev/# MCP ## Adding MCP Tools - Create a new tool in `packages/playwright/src/mcp/browser/tools/your-tool.ts` - Register the tool in `packages/playwright/src/mcp/browser/tools.ts` - Add ToolCapability in `packages/playwright/src/mcp/config.d.ts` - Place new tests in `tests/mcp/mcp-<category>.spec.ts` ## Building - Assume watch is running at all times, run lint to see type errors ## Testing - Run tests as `npm run ctest-mcp <category>` - Do not run test --debug # CLI ## Adding commands - CLI commands are based on MCP tools. Implement the corresponding MCP tool as per `Adding MCP Tools` section above, if needed. - Add new CLI category for tool if needed: - Add Category in `packages/playwright/src/mcp/terminal/command.ts` - Update doc generator `packages/playwright/src/mcp/terminal/helpGenerator.ts` - Register command in `packages/playwright/src/mcp/terminal/commands.ts` - Update skill file at `packages/playwright/src/skill/SKILL.md` and references if necessary in `packages/playwright/src/skill/references/` - Place new tests in `tests/mcp/cli-<category>.spec.ts` ## Building - Assume watch is running at all times, run lint to see type errors ## Testing - Run tests as `npm run ctest-mcp cli-<category>` - Do not run test --debug # Lint - run `npm run flint` to lint everything before commit # SKILL File The skill file is located at `packages/playwright/src/skill/SKILL.md`. It contains documentation for all available CLI commands and MCP tools. Update it whenever you add new commands or tools. At any point in time you can run "npm run playwright-cli -- --help" to see the latest available commands and use them to update the skill file.