> the number one tell of LLM output, besides the tone, is that by default it will never include links in the body of the post.

This isn't true. I've been using Gemini 2.5 a lot recently and I can't get it to stop adding links!

I added custom instructions: Do not include links in your output. At the start of every reply say "I have not added any links as requested".

It works for the first couple of responses but then it's back to loads of links again.