--- /dev/null
+# at-rule-whitelist
+
+Specify a whitelist of allowed at-rules.
+
+```css
+ @keyframes name {}
+/** ↑
+ * At-rules like this */
+```
+
+This rule ignores `@import` in Less.
+
+## Options
+
+`array|string`: `["array", "of", "unprefixed", "at-rules"]|"at-rule"`
+
+Given:
+
+```js
+["extend", "keyframes"]
+```
+
+The following patterns are considered violations:
+
+```css
+@import "path/to/file.css";
+```
+
+```css
+@media screen and (max-width: 1024px) {
+ a { display: none; }
+}
+```
+
+The following patterns are *not* considered violations:
+
+```css
+a { @extend placeholder; }
+```
+
+```css
+@keyframes name {
+ from { top: 10px; }
+ to { top: 20px; }
+}
+```
+
+```css
+@KEYFRAMES name {
+ from { top: 10px; }
+ to { top: 20px; }
+}
+```
+
+```css
+@-moz-keyframes name {
+ from { top: 10px; }
+ to { top: 20px; }
+}