docs: function(){
      // set up router
      router.route(/^\/(active|completed)$/).param(0).as(function(subset){
        Todo.selected.set(Todo[subset || 'all']);
      });
  
      // return app root node
      return new Node({
        template: resource('./app/template/layout.tmpl'),
        binding: {
          // nested views
          form: resource('./module/form/index.js'),
          list: resource('./module/list/index.js'),
          stat: resource('./module/stat/index.js')
        }
      });
    }