.lesshintrc

{
    "fileExtensions": [".less"],

    // These rules are almost certainly crap and will not catch bugs (Caleb)
    "newlineAfterBlock": { "enabled": false }, // not just a newline but an entire empty line after each block
    "spaceAroundOperator": { "enabled": false }, // disallow calc(10px+10px);
    "hexLength": { "enabled": false }, // require long hex color codes or require short where possible
    "hexNotation": { "enabled": false }, // require hex lowercase
    "propertyOrdering": { "enabled": false }, // require attributes to be in alphabetical order D:
    "stringQuotes": { "enabled": false }, // force quoting of strings with ' or " (silly)
    "importPath": { "enabled": false }, // require imports to not have .less, ridiculous
    "qualifyingElement": { "enabled": false }, // disallow div.xxx and require .xxx
    "decimalZero": { "enabled": false }, // disallow .5em
    "borderZero": { "enabled": false }, // disallow border: none;
    "selectorNaming": { "enabled": false }, // this would be crap because classes are what they are.
    "zeroUnit": { "enabled": false },
    "singleLinePerProperty": { "enabled": false },
    "_singleLinePerProperty": {
        "enabled": true,
        "allowSingleLineRules": true
    },
    "spaceAroundComma": { "enabled": false },
    "importantRule": { "enabled": false },
    "universalSelector": { "enabled": false },
    "idSelector": { "enabled": false },
    "singleLinePerSelector": { "enabled": false },
    "spaceBetweenParens": { "enabled": false },
    "maxCharPerLine": { "enabled": false }, // using lesshint flags can cause long lines
    "comment": { "enabled": false }, // ban multi-line comments ?

    // These rules should be discussed, if they're crap then they should be moved up.
    "colorVariables": { "enabled": false }, // require all colors to be stored as variables first...
    "variableValue": { "enabled": false }, // any attribute types which should always be variables ?  color?
    "spaceBeforeBrace": { "enabled": true },//{ "enabled": true, "style": "one_space" },

    // Turn everything else on
    "spaceAfterPropertyColon": { "enabled": true },
    "finalNewline": { "enabled": true }, // require an empty line at the end of the file (enabled for now)
    "attributeQuotes": { "enabled": true },
    "depthLevel": {
        "depth": 1 // TODO(cjd) This is obviously not triggering, even with 1
    },
    "duplicateProperty": { "enabled": false },
    "emptyRule": { "enabled": true },
    "hexValidation": { "enabled": true }, // disallow actual garbage color hex codes (e.g. #ab)
    "propertyUnits": {
        "valid": ["rem", "vw", "em", "px"], // These units are allowed for all properties
        "invalid": ["pt"],      // The 'pt' unit is not allowed under any circumstances
        "properties": {
            //"line-height": []   // No units are allowed for line-height
        }
    },
    "spaceAfterPropertyName": { "enabled": true, "style": "no_space" },
    "spaceAfterPropertyValue": { "enabled": true, "style": "no_space" },
    "spaceAroundBang": { "enabled": true, "style": "before" },
    "trailingSemicolon": { "enabled": true },
    "trailingWhitespace": { "enabled": true },
    "urlFormat": { "enabled": true, "style": "relative" },
    "urlQuotes": { "enabled": true }
}