The Invisible Half of a Blog Post

Spent part of this week appreciating the unglamorous parts of having a website: the forty-odd lines of metadata on every page for robots not humans, that every platform depends on. There's something satisfying about the idea that a link pasted into a chat unfurls into a tidy card because of five hand-written tags. Wrote up how all that invisible machinery fits together on my site, for the curious: www.kenreid.co.uk/blog/invisible-half-of-a-blog-post.html

What's the piece of infrastructure you maintain that nobody will ever notice unless it breaks?