What is wrong with this boxes implementation?

bio_box_fail.php

// From os_biocv.module

/**
 * Implements hook_os_widget().
 *
 * Exposes blocks as OpenScholar widgets.
 */
function os_biocv_os_widget() {
  $items = array();

  // Displays user's Bio node if available, otherwise prompts user.
  $items['os_biocv-bio'] = array(
      'module' => 'boxes',
      'delta' => 'boxes-bio',
      'weight' => '-10',
      'info' => 'Bio Teaser',
  );

  return $items;
}

// From os_biocv.info

features[box][] = boxes-bio

// From os_biocv.box.inc

/**
 * Implements hook_default_box().
 */
function os_biocv_default_box() {
  $export = array();

  $nid = 0;
  if (function_exists('_os_biocv_get_bio_node')) {
    $node = _os_biocv_get_bio_node();
    if ($node !== FALSE) {
      $nid = $node->nid;
    }
  }

  $box = new stdClass();
  $box->disabled = FALSE; /* Edit this to true to make a default box disabled initially */
  $box->api_version = 1;
  $box->delta = 'bio';
  $box->plugin_key = 'os_boxes_bio';
  $box->title = '';
  $box->description = 'Bio Teaser';
  $box->options = array(
    'nid' => $nid,
    'teaser' => 'teaser',
  );
  $export['boxes-bio'] = $box;

  return $export;
}

// From os_bioxes_bio.inc

class os_boxes_bio extends os_boxes_default { 
  /**
   * Implements boxes_content::options_defaults().
   */
  public function options_defaults() {
    // ...
    return array();
  }

  /**
   * Implements boxes_content::options_form().
   */
  public function options_form(&$form_state) {
    // ...
    return $form;
  }

  /**
   * Implements boxes_content::render().
   */
  public function render() {
    // ...
    return array();
  }

  /**
   * Renders empty text for a vsite admin without a Bio node
   */
  protected function render_no_bio() {
    // ...
    return $string;
  }

  /**
   * Returns the cache parameters for this box
   */
  public function cache_info() {
    // ...
    return array();
  }
}

// From os_boxes.plugins.inc

function _os_boxes_boxes_plugins() {
  // ...

  $info['os_boxes_bio'] = array(
    'title' => 'Bio',
    'description' => 'Teaser of your personal Bio',
    'tags' => array('Social'),
    'handler' => array(
      'class' => 'os_boxes_bio',
      'file' => 'os_boxes_bio.inc',
      'path' => $path . '/os_boxes_bio',
      'parent' => 'os_boxes_default',
    ),
  );
  
  // ...
}

Currently, with the code above, the widget displays on the CP Layout page, but:

• The title is "Untitled"
• There is no configuration gear icon
• Dragging the box to a region and clicking "Save for [site]", the region does not save.*

*This makes it hard to test the box content -- I can't get it to display!