The plugin doesn’t work for adding CSS and JS, though, because my custom code is added into the head before other theme styles and scripts are included, ruining the hierarchies and dependencies. You changed it to a high priority in version 1.1.3, for reasons I understand, but this makes it less useful for a wide variety of other cases. I modified the code in plugin.php myself to decrease the priority (changed from 1 to 10): “add_action(‘wp_head’, ‘hefo_wp_head’, 10);”. This makes the custom code appear at the end of the head, after other CSS/JS.
I’d like to recommend you offer an option to set the priority in the options page. A lot of people could use this for sitewide custom CSS/JS if you made this change. Thanks again for the plugin.