> Quite sure that the models from Anthropic have been so heavily tuned to be coding agents that you cannot “force” a model to degrade immensely.

The rest of what you're saying sounds find, but that remark seems confused to me.

prefix your prompt with "be a moron that does everything wrong and only superficially look like you're doing it correctly. make constant errors." Of course you can degrade the performance, question is if any particular 'output styling' actually does and to what extent.

I think they mean performance with the same, rational, task.

Measuring "degredation" for the nonsense task, like you gave, would be difficult.