I noticed the assistant reasoning block referred to this text in the system prompt: "Avoid mentioning the specific sources of your information (For example: 'based on the provided information' or 'according to my web search')." I'm not sure if this is accurate, but regardless I'd like to be able to edit or remove portions of the Kagi system prompt, and see what the rest of it is. I imagine it might be different for different models, so that tool use is correctly configured.
In the Settings, under Assistant, Custom Assistants, when you click on the pencil to edit, there could either be an additional text box showing the Kagi system prompt that can be edited, or a button to another screen, or at least a way to view the prompt. (I think a warning that editing or overriding it may cause the Assistant to not work correctly would be helpful too.) Using /system_prompt_overwrite would work if the full text of the current Kagi system prompt were available.