Claude Bot still (at least last month, and it's been doing it for over a year now) seems to have a bug when traversing (at least my sites), wherein it drops the trailing slash of a directory (which is present in the a href tag), then makes the request to the subdirectory without the slash I put in the link, then Caddy automatically responds to that (via the built-in File handler) with a redirect telling it to add the trailing slash, and Claude Bot then makes the request again with the trailing slash that should have been there in the first place.

So most subdirectory URLs get two requests from Claude bot, the first one needless because that wasn't the URL in the tag.