nt because plea discussions are not confidential: Disclosure of work-product materials to an adversary waives the work-product privilege. See, e.g., Jnre Chrysler Motors Corp. Overnight Evaluation Program Litig., 860 F.2d 844, 846 (8th Cir. 1988); In re Doe, 662 F.2d 1073, 1081-82 (4th Cir. 1981). Even if it shared the comm