How to use Coder with Drush?
coder.drush.inc exists in module, so yes, it can. Only command available is coder-format. Module provides following examples:

  'drush coder-format sites/all/modules/coder/coder.module' =&gt; 'Re-format coder.module according to Drupal coding standards.',
  'drush coder-format --undo sites/all/modules/coder/coder.module' =&gt; 'Restore coder.module from coder.module.coder.orig backup file (if existent).',
  'drush coder-format sites/all/modules/coder' =&gt; 'Recursively re-format Coder module files according to Drupal coding standards.',
  'drush coder-format --undo sites/all/modules/coder' =&gt; 'Recursively restore Coder module files from *.coder.orig backup files (if existent).',