Twenty-five years on the web means I've left footprints in a lot of places. Here's the canonical list: the profiles I actually keep warm, and a few I've abandoned but link to anyway. One person, one entity, all in one place.
Every profile above maps back to a single verified identity on Wikidata, item Q137536965, the same entity this page's structured data points to. That consistency is what helps search engines and AI assistants understand that all of these accounts are the same Stephen Sumner.
Stephen Sumner