Agent harnesses are changing, not dying, as Harness-Zero trains harness behavior into a model
AIA Peking University research team trained a small model, Qwen3.5-9B, on corrected runs produced by a harness, then removed the harness. The distilled model's average task success rose 21 points over its untrained predecessor, beating the model-plus-harness combination.
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O'Reilly Radar · Laurie Voss · oreilly.comPublished · added here
Original title: Are agent harnesses dying? What harness distillation changes.