Typically for most code it's telling claude how to run tests. For front end code it's giving claude a way to 'see' the work for example a Playwrite MCP server

Typically for most code it's telling claude how to run tests. For front end code it's giving claude a way to 'see' the work for example a Playwrite MCP server seems common. https://playwright.dev/docs/getting-started-mcp https://playwright.dev/docs/getting-started-mcp