Barebones Stylus Change Watcher

Gruntfile.js

module.exports = function(grunt) {

    grunt.initConfig({

        watch: {
            css: {
                files: '**/*.styl',
                tasks: ['stylus'],
                options: {
                    livereload: true
                }
            }
        }, 

        stylus: {
            compile: {
                options: {
                    paths: ['/home/dehuszar/Development/v2.margueriteallen.com/wp-content/themes/mda-v2']
                },
                files: {
                    '/home/dehuszar/Development/v2.margueriteallen.com/wp-content/themes/mda-v2/app.css': '/home/dehuszar/Development/v2.margueriteallen.com/wp-content/themes/mda-v2/app.styl'
                }
            }    
        }
 
    });

    grunt.loadNpmTasks('grunt-contrib-watch');
    grunt.loadNpmTasks('grunt-contrib-stylus');
    
    // Default task(s).
    grunt.registerTask('default', ['stylus']);
}

package.json

/* in a new project folder, run the following:
*  npm init
*  npm install -g grunt-cli (if it's a new environment)
*  npm install grunt --save-dev
*  npm install grunt-contrib-stylus (or whatever pre-processor you need)
*  npm install grunt-contrib-watch
*/
{
  "name": "mda-resume-site",
  "version": "0.1.0",
  "devDependencies": {
    "grunt": "^0.4.5",
    "grunt-contrib-stylus": "^0.20.0",
    "grunt-contrib-watch": "^0.6.1"
  }
}