HeuriGym: An Agentic Benchmark for LLM-Crafted Heuristics in Combinatorial Optimization - Chen, Hongzheng; Wang, Yingheng; Cai, Yaohui; Hu, Hins; Li, Jiajie; Huang, Shirley; Deng, Chenhui; Liang, Rongjian; Kong, Shufeng; Ren, Haoxing; Samaranayake, Samitha; Gomes, Carla; et al. (International Conference on Learning Representations, 2026)