After experimenting with CRUD with AJAX, couple more experiments on AJAX with Smarty:

1) Using Smarty templates to generate JSON, XML, and HTML responses for Ajax requests

https://github.com/mambax7/ajaxsmartyibm

based on this IBM article:https://github.com/mambax7/ajaxsmartyibm/blob/master/docs/wa-aj-smarty-pdf.pdf

2) AJAX-enabled Smarty plugins
https://github.com/mambax7/ajaxsmartyplugins

based on these two articles:
https://kpumuk.info/php/ajax-enabled-smarty-plugins/comment-page-1
https://kpumuk.info/php/ajax-enabled-smarty-plugins-part-2-ajax_form/

I'm not sure how much it will be of use to XOOPS going forward, but it was an interesting exercise

Go fork them, improve them, and contribute back!