Creating a custom post type (CPT) archive breadcrumbs plugin in WordPress can significantly enhance site navigation and improve user experience. Breadcrumbs provide a clear path to users on how they’ve navigated through your site and help in SEO by making site structure clear to search engines.

To start, you need basic knowledge of PHP and understanding of the WordPress plugin structure. Begin by creating a new plugin directory in wp-content/plugins, then create a PHP file for your plugin. In the plugin file, start with the standard WordPress plugin header to recognize it as a valid plugin.

Next, use the add_action() hook to integrate with WordPress’s breadcrumb functionality. You’ll need to write a function that constructs the breadcrumb trail dynamically based on the custom post type and its archive. If you are not familiar with writing PHP functions for WordPress, consider exploring detailed guides or tutorials.

Lastly, make sure you activate the plugin from the WordPress admin dashboard and test it on your site to ensure it works correctly. For more comprehensive breadcrumb features, you might explore existing solutions like Yoast SEO, which also offers advanced breadcrumb controls.