Composer template and instructions to extend Drupal Console adding commands globally.
Execute the init command and select /Users/USER_NAME/.console/ when asked for destination.
drupal init
NOTES: For instructions about installing the Drupal Console Launcher.
cd ~/.console/
composer create-project \
drupal/console-extend extend \
--no-interaction
NOTE: You can use --keep-vcs to prevent deletion of .git directory.
cd ~/.console/extend
composer update