In an earlier post, Kyle wrote a great introduction to the new configuration management system in Drupal 8. He demonstrated how end users can leverage this new system to easily migrate site configuration between environment, which helps eliminate the "did you remember to check the boxes in the right order?" problem for site builders everywhere. In this post, I take a look at configuration management from the perspective of a module developer. What do we need to write in our custom code to ensure that our configuration settings are easy to deploy?