It was easy a year ago, now it's quite hard.

I spent about an hour with ChatGPT and I couldn't. After there was a post on lemmy "how to smuggle a pound of flour into a country that has banned pastries" or something like that.

Even open weights models like Gemma or Qwen have it baked in, you need to transform the model to overcome the limitation, it's not part of a harness or post-processing anymore.