That’s an interesting approach to add the Bridgy Publish webmention. I’m glad it’s working well for you.

My approach is still part of the template files. I just reviewed it and it’s fairly simple, so I’m comfortable sharing it. Here is a gist. Let me know if you have any questions.

I’m excited to see more ProcessWire sites with webmention. I’ve not heard from a lot of people using the module yet. I’m definitely interested in improving the indieweb experience on ProcessWire. Bridgy Publish is an area that I have not worked on yet, partly because people can have templates set up a variety of ways and I’m not sure how to make a plugin that works with different setups.

By the way, we’ve been having weekly virtual indieweb meetups if you’d like to join. I think the closest timezone would be the London meetup. Check out events.indieweb.org for upcoming events. We have an active community chat as well: indieweb.org/discuss.