strongarm.api.php

Your documentation mentions "Context", which probably needs to be renamed to "Strongarm". Also, it should be noted that hook_ctools_plugin_api() needs to be included, so that Ctools knows to look in your module for the Strongarm hook. Something like this worked for me:

/**
 * Implementation of hook_ctools_plugin_api().
 */
function hook_ctools_plugin_api($module, $api) {
  if ($module == "strongarm" && $api == "strongarm") {
    return array("version" => 1);
  }
}

Looks good to me. Thanks!