There are <kcite> and </kcite> tags that appear throughout the responses of the Research assistant, assumingly in places where footnotes/references are or would be.
Here is an example thread that I will leave up for a while: https://kagi.com/assistant/7ebf05c7-f367-46c2-9240-120d0e3ed6e0
I don't expect the tags to be there, and to instead properly present whatever they're trying to present.