It took me a minute of thinking to understand how this could even be considered a jailbreak; if Anthropic are going to turn out models that can't handle "find and develop regression test scripts for bugs in this program" as a prompt then it is going to take serious model crippling. To be able to prompt the model someone will need to already understand secure programming - the model itself won't be able to independently detect security problems without active guidance.
It isn't, though. The venn diagram has overlap for sure, and the "normal bugfixing" flows may yield results that are useful for offensive security, but a more targeted prompt asking for a specific security objective would be more effective, if allowed.
If the guardrails can be bypassed at, say 50x token cost (due to the agent also pursuing things you don't care about), then it's still pretty effective as a safeguard, because at that cost you might as well hire humans instead.
And, having to "babysit" a model while you re-prompt to work around guardrails strongly limits how much you can scale up your work.
If humans have to be hired at inflated rates because you’re e.g. the North Korean government, hopefully 50x token costs don’t look competitive.
For more on this see "Simple Made Easy" by Rich Hickey.