ASTRA: Automated Synthesis of agentic Trajectories and Reinforcement Arenas. - Xiaoyu Tian; Haotian Wang; Shuaiting Chen; Hao Zhou; Kaichi Yu; Yudian Zhang; Jade Ouyang; Junxi Yin; Jiong Chen; Baoyan Guo; Lei Zhang; Junjie Tao; et al. (CoRR, 2026)