A Guideline-Aware AI Agent for Zero-Shot Target Volume Auto-Delineation. - Yoon Jo Kim; Wonyoung Cho; Jongmin Lee; Han Joo Chae; Hyunki Park; Sang Hoon Seo; Noh Jae Myung; Kyungmi Yang; Dongryul Oh; Jin Sung Kim (CoRR, 2026)