Watched it for a while, thinking eventually it'd end. It didn't, seemed like Claudebot and GPTBot (which was the only two I saw, but could have been forged) went over the same URLs over and over again. They tried a bunch of search queries too at the same time.
The day after I got tired of seeing it so added a robot.txt forbidding any indexing. Waited a few hours, saw that they were still doing the same thing, so threw up basic authentication with `wiki:wiki` as the username:password basically, wrote the credentials on the page where I linked it and as expected they stopped trying after that.
They don't seem to try to bypass anything, whatever you put in front will basically defeat them except blocking them by user-agent, then they just switch to a browser-like user-agent instead, which is why I went the "trivial basic authentication" path instead.
Wasn't really an issue, just annoying when they try to masquerade as normal users. Had the same issue with a wiki instance, added rate limits and eventually they seemingly backed off more than my limits were set too, so I guess they eventually got it. Just checked the logs and seems they've stopped trying completely.
Seemingly it seems like people who are paying for their hosting by usage (which never made sense to me) is the ones hard hit by this. I'm hosting my stuff on a VPS, and don't understand what the big issue is, worst case scenario I'd add more aggressive caching and it wouldn't be an issue anymore.