This plugin can not be used with clean-css-brunch. Clean-css-brunch will concatenate all css files into one css file which will undo the results from bless-brunch. Please visit blesscss.com for more information.
npm install --save-dev bless-brunch
Optionally, you can configure the plugin for your needs.
module.exports.plugins={bless: {cacheBuster: true,cleanup: true,compress: true,force: false,imports: true,outputDirectory: undefined// Output directory for blessed css files.}}