Constitutional Classifiers++: Efficient Production-Grade Defenses against Universal Jailbreaks - Cunningham, Hoagy; Wei, Jerry; Wang, Zihan; Persic, Andrew; Peng, Alwin; Abderrachid, Jordan; Agarwal, Raj; Chen, Bobby; Dau, Andy; Dimitriev, Alek; Howard, Logan; Hua, Yijin; et al. (International Conference on Learning Representations, 2026)