From Static Benchmarks to Dynamic Protocol: Agent-Centric Text Anomaly Detection for Evaluating LLM Reasoning - YOA, Seungdong; Yoon, Sanghyu; Yoon, Suhee; Kim, Dongmin; SIM, YE SEUL; Lee, Junhyun; Lim, Woohyung (International Conference on Learning Representations, 2026)