Before you start
Playwright MCP runs on your machine with npx @playwright/mcp@latest and needs Node.js 18 or newer. Point it at a staging site and a test account, never real payment details. By default it keeps a browser profile for each project, so sign-ins carry over; start it with --isolated for a clean profile every time. Its README states it is not a security boundary, so treat the browser as fully open to your agent. The page checks, such as browser_verify_text_visible, are listed under its testing capability, so start it with --caps=testing if they are missing.
1
Write the flow with expected results
Say what to do and what you expect to see after each action. Vague flows give vague reports.
Say to Claude CodeOn [staging URL], do this: 1) open the pricing page, 2) pick the [plan name] plan, 3) fill the signup form with [email protected] and a test password, 4) submit. After each step tell me what you expect to see. Don't run anything yet.
2
