package.json for Grunt-cli

Gruntfile.js

module.exports = function(grunt) {
 
  grunt.registerTask('watch', [ 'watch' ]);
 
  grunt.initConfig({
    less: {
      style: {
        files: {
          "css/screen.css": "less/screen.less"
        }
      }
    },
    watch: {
      css: {
        files: ['less/*.less'],
        tasks: ['less:style'],
        options: {
          livereload: true,
        }
      }
    }
  });
 
  grunt.loadNpmTasks('grunt-contrib-less');
  grunt.loadNpmTasks('grunt-contrib-watch');
 
};

package.json

{
  "name": "my-project",
  "version": "0.0.1",
  "dependencies": {
    "grunt-cli": "latest",
    "grunt-contrib-less": "latest",
    "grunt-contrib-watch": "latest"
  }
}