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RLM harnesses are claimed to help models generalize to similar unseen tasks 8–32 times longer than training tasks
The author says well-designed harnesses can make structurally similar tasks look nearly identical to individual model calls, even when the tasks come from different domains.
TLDR
In a July 2026 post, the author says RLMs trained only on short tasks can fully generalize to similar unseen tasks 8–32 times longer because the harness produces near-identical task trajectories. The author also reports that training on grouping essays by author can improve performance on grouping math problems by similar solutions.
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