[stasomatic]

And...

Me: "The gap, stated plainly:" stop using the type of language.

Claude: "You're right. That's one of the constructions your preferences told me to drop, and I used it anyway."

[jedbrooke]

I find sonnet and haiku will do that, but I rarely get that with opus. When it does happen it’s a good cue to start a new session. That’s another benefit of the style guide is it’s a good canary for when the model has gone off the rails. If it’s left the style guide, the rest of the response can likely be discarded as departed from reality.