You can trace back to the original repo from that thread. The key points are that the copy had
1. The same name. One was "Dark Hours" and the other was "DarkHours".
2. The same highly specific bug. I didn't investigate closely but from the description the bug sounds too unique to have been identically created in a fresh Claude-style duplication.
The duplicated name is the most damning part to me. I've never tried to copy a project with Claude, but I can't imagine the sequence of events that would lead to Claude copying the name of a repo but going to lengths to disguise other things like stripping the license. This all seems highly intentional, like someone thought it would never be noticed.