yarn add --dev stylelint stylelint-a11y

Create the .stylelintrc.json config file (or open the existing one), add stylelint-a11y to the plugins array and the rules you need to the rules list. All rules from stylelint-a11y need to be namespaced with a11y.

{
  "plugins": [
    "stylelint-a11y"
  ],
  "rules": {
    "a11y/selector-pseudo-class-focus": true,
    "a11y/media-prefers-reduced-motion": true,
  }
}

Please refer to stylelint docs for the detailed info on using this linter.

• selector-pseudo-class-focus: Require or disallow a pseudo-element to the selectors with :hover
• media-prefers-reduced-motion: Require certain styles if the animation or transition in media features.

There work on the plugin's rules is still in progress, so if you feel like it, you're welcome to help out in any of these (the plugin follows stylelint guidelines so most part of this is based on its docs):

• Create, enhance, and debug rules (see stylelint's guide to "Working on rules").
• Improve documentation.
• Chime in on any open issue or pull request.
• Open new issues about your ideas on new rules, or for how to improve the existing ones, and pull requests to show us how your idea works.
• Add new tests to absolutely anything.
• Work on improving performance of rules.
• Contribute to stylelint
• Spread the word.

We communicate via issues and pull requests.

There is also stackoverflow, which would be the preferred QA forum.