I think I kind of have an idea what the author was doing, but not really.
if this is true, the learning is opus 4.5 can hijack system prompts of other models.
I find this confusing. Why would writing in all caps trigger an alert? What danger does caps incur? Does writing in caps make a prompt injection more likely to succeed?
if you were to design a system to prevent prompt injections and one of surefire ways is to repeatedly give instructions in caps, you would have systems dealing with it. And with instructions to change behavior, it cascades.