It would be super useful if there was a way to ignore files and directories without touching the PHPCS standard file. This would be similar to tools like ESLint, which has a .eslintignore file separate to the standard.

For our specific use case, we want to share a standard across many projects, but those projects might include external libraries or legacy code that need to be ignored on a project-basis. Being able to do this without needing to extend the standard would make adoption across our legacy projects much easier.