Choose which configs to extend — standard, SCSS, Prettier compatibility — and the tool outputs a .stylelintrc.json with the matching extends array.
Yes. The extends array references packages like stylelint-config-standard or stylelint-config-scss — install whichever ones you selected.
Yes, as a starting point — adjust the values to match your actual project structure and tooling versions.
It follows the tool's documented format, but always run your build once after adding it to confirm your specific setup is happy.