He released a Micropub endpoint for Kirby. In a blog post, he explains what basic a micropub endpoint, which he added to his toolkit (se further down) does. For Kirby, he has written a Kirby Micropub Endpoint.
In addition, he published a webmentions plugin, which is also based on Bastians first version of the webmention plugin for Kirby. Webmentions are:
Webmention is a simple way to notify any URL when you link to it on your site. From the receiver's perspective, it's a way to request notifications when other sites link to it. Webmention is a modern update to Pingback, using only HTTP and x-www-form-urlencoded content rather than XMLRPC requests. Webmention supersedes Pingback.
Read more about what webmentions are on the IndieWeb site