The other day around the office, I was surprised to discover not everyone realizes that you can do some crazy stuff around extending drush commands.
First step: Read the documentation. Drush is intentionally written to be a command-line foil for Drupal, and if you’ve built a module, a few minutes digging into the well-done docs will go a long way. Check out the Drush API if you are of a mind, or for a more focused burst of hook goodness, get out your terminal and type:
Once you have a grasp of the fine hooks you can use to piggy-back on and around any Drush command, you can take it to the next level.