1. "Conversation" is purely anthropomorphism. It's software input and output. If the client makes an excel spreadsheet about the cost benefit of ripping off people, it's not work-product.

But the lawyer's draft damages analysis in excel has always been protected.

2. If we're going to buy the "conversation" conceit, lawyers talking to consulting experts have always had a lot more work product protection than testifying experts.

The lawyer talking to Claude feels like talking to a consulting expert, especially since Claude can't have independent knowledge of facts that would allow it to testify.