.lesshintrc

{
    "fileExtensions": [".less"],
    "excludedFiles": ["mixins.less"],
    "attributeQuotes": {
      "enabled": true,
      "style": "double"
    },
    "borderZero": {
        "enabled": true,
        "style": "none"
    },
    "comment": {
        "enabled": false
    },
    "decimalZero": {
        "enabled": true,
        "style": "leading"
    },
    "depthLevel": {
        "enabled": false,
        "depth": 3
    },
    "duplicateProperty": {
        "enabled": true
    },
    "emptyRule": {
        "enabled": true
    },
    "finalNewline": {
        "enabled": true
    },
    "hexLength": {
        "enabled": true,
        "style": "long"
    },
    "hexNotation": {
        "enabled": true,
        "style": "lowercase"
    },
    "hexValidation": {
        "enabled": true
    },
    "idSelector": {
        "enabled": false
    },
    "importantRule": {
        "enabled": true
    },
    "importPath": {
        "enabled": false,
        "leadingUnderscore": true
    },
    "propertyOrdering": {
        "enabled": false
    },
    "qualifyingElement": {
        "allowWithAttribute": true,
        "allowWithClass": true,
        "allowWithId": true
    },
    "selectorNaming": {
        "disallowUppercase": true,
        "disallowUnderscore": true,
        "disallowDash": true,
        "exclude": []
    },
    "singleLinePerProperty": {
        "enabled": true
    },
    "singleLinePerSelector": {
        "enabled": true
    },
    "spaceAfterPropertyColon": {
        "enabled": true,
        "style": "one_space"
    },
    "spaceAfterPropertyName": {
        "enabled": true,
        "style": "no_space"
    },
    "spaceAfterPropertyValue": {
        "enabled": true,
        "style": "no_space"
    },
    "spaceAroundComma": {
        "enabled": true,
        "style": "after"
    },
    /* As of 1.3.1 this is returning false negatives when it comes across
     * negative numbers in calculations or shorthand.
     *
     * https://github.com/lesshint/lesshint/issues/129
     */
    "spaceAroundOperator": {
        "enabled": true, // disabled until lesshint#129 fixed
        "style": "both"
    },
    "spaceBeforeBrace": {
        "enabled": true,
        "style": "one_space"
    },
    "spaceBetweenParens": {
        "enabled": true,
        "style": "no_space"
    },
    "stringQuotes": {
        "enabled": true,
        "style": "double"
    },
    "trailingSemicolon": {
        "enabled": true
    },
    "trailingWhitespace": {
        "enabled": false
    },
    "urlFormat": { // we want both
        "enabled": true,
        "style": "relative"
    },
    "urlQuotes": {
        "enabled": true
    },
    "zeroUnit": {
        "enabled": true,
        "style": "no_unit"
    }
}