gistfile1.pl

package MyApp::Plugin::TooCool;

use Moo;

sub get_something {
  my ($self, $c, $default) = @_;
  return $c->param('something') || $default || 'could not find something';
}

sub register {
  my ($self, $app, $config) = @_;

  $app->helper( $self => 'too_cool' );
}

#============================================================================
package MyApp::Controller::User;

sub some_action {
  my $c = shift;

  $c->render(text => $c->too_cool->get_something(123));
}