@article{whatdoesmultiharnessrllearncreditassignm,
  title = {What Does Multi-Harness RL Learn? Credit Assignment and Portability in Coding Agents},
  author = {Chenqian Le and Jiayi Cheng and Qijia He and Runhao Li and Yinghao Li and Xupeng Chen},
  year = {2026},
  eprint = {2609.04518},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.04518},
}