Coding agents improve more when their model and harness co-evolve

Self-HPO alternates harness redesign with reinforcement learning, targeting new failure modes after each policy update.

Big Tech
Zhepei Wei · Wenlin Yao · Baolin Peng · Danqing Wang · Qianhui Wu · Hao Cheng · +2 more

Microsoft Research · University of Virginia · Carnegie Mellon University

Research Digest··3 min read
Wei et al.

5-35B-A3B with mini-SWE-agent, an external harness that controls what the model observes, how commands are executed, what feedback is returned, and when work stops.

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