htmlhint.conf

{
    "tag-pair": true,
    "tag-self-close": true,
    "attr-no-duplication": true,
    "spec-char-escape": true,
    "id-unique": true,
    "title-require": true,
    "alt-require": true,
    "doctype-html5": true,
    "id-class-value": true,

    "jshint": {
        "enforceall": true,
        "browser": true
    },

    "csslint": {
        "adjoining-classes": true,
        "bulletproof-font-face": true,
        "compatible-vendor-prefixes": true,
        "display-property-grouping": true,
        "duplicate-background-images": true,
        "duplicate-properties": true,
        "empty-rules": true,
        "fallback-colors": true,
        "floats": true,
        "font-faces": true,
        "font-sizes": true,
        "gradients": true,
        "import": true,
        "important": true,
        "known-properties": true,
        "non-link-hover": true,
        "overqualified-elements": true,
        "qualified-headings": true,
        "regex-selectors": true,
        "shorthand": true,
        "star-property-hack": true,
        "text-indent": true,
        "underscore-property-hack": true,
        "vendor-prefix": true,
        "unique-headings": true,
        "universal-selector": true,
        "unqualified-attributes": true,
        "zero-units": true
    }
}