Brilliant!
I've been wanting to do this for some time... but then @mxbck implements Webmentions beautifully on his @eleven_ty site and shares exactly how with more clarity than I could have hoped for.
Yoink!
https://mxb.at/blog/using-webmentions-on-static-sites/
My tweets and posts live here on my own domain these days.
You can explore them here and follow me on Mastodon instead of Twitter where I'm not currently active.