WideSWE tests coding agents on 120 cross-repository tasks: best configuration solves only 42.50%, and joint execution beats independent runs on requests
Drawing on 1,729,171 pull requests across 103 software ecosystems, the authors built WideSWE, 120 real tasks (60 bug fixes, 60 features) that require coordinated changes across multiple repositories, and evaluated seven coding-agent configurations: full task success ranges from 10.83% to 42.50%, with Codex CLI paired with GPT-5.6-sol highest, while joint and per-repository independent execution each help in different ways.