.stylelintrc.json

{
    "plugins": ["stylelint-header"],
    "extends": [],
    "rules": {
        "header/header": ["config/license.js", {}]
    },
    "overrides": [
        {
            "files": [
                "!packages/**/src/spectrum-*.css",
                "!tools/**/src/spectrum-*.css",
                "!tools/styles/**/*.css"
            ],
            "extends": ["stylelint-config-standard"],
            "rules": {
                "header/header": ["config/license.js", {}],
                "length-zero-no-unit": [
                    true,
                    { "ignore": "custom-properties" }
                ],
                "selector-type-no-unknown": [
                    true,
                    { "ignore": ["custom-elements"] }
                ],
                "selector-pseudo-element-colon-notation": ["single", {}],
                "custom-property-pattern": "^_?([a-z][a-z0-9]*)(-[a-z0-9]+)*$",
                "no-duplicate-selectors": null,
                "selector-class-pattern": null,
                "no-descending-specificity": null,
                "declaration-block-no-redundant-longhand-properties": null
            }
        }
    ]
}