Hooks

SkinTweekiStyleModules

works similar to SkinVectorStyleModules

public static function onSkinTweekiStyleModules( $skinTweeki, &$styles ) { ... }

$wgHooks['SkinTweekiStyleModules'][] = 'MyExtensionHooks::onSkinTweekiStyleModules';

SkinTweekiAdditionalBodyClasses

public static function onSkinTweekiAdditionalBodyClasses( $skinTweeki, &$styles ) { ... }

$wgHooks['SkinTweekiAdditionalBodyClasses'][] = 'MyExtensionHooks::onSkinTweekiAdditionalBodyClasses';