KARL: Knowledge Agents via Reinforcement Learning. - Jonathan D. Chang; Andrew Drozdov; Shubham Toshniwal; Owen Oertell; Alexander Trott; Jacob P. Portes; Abhay Gupta; Pallavi Koppol; Ashutosh Baheti; Sean Kulinski; Ivan Zhou; Irene Dea; et al. (CoRR, 2026)