developer tools
The Harness Verified Only the Behaviors It Touched
HarnessLens directs scarce evaluation rollouts toward tasks attributable to each proposed runtime change.
Summary
HarnessLens directs scarce evaluation rollouts toward tasks attributable to each proposed runtime change.
Across three agent harnesses and four benchmarks, the authors report held-out gains of 7.6 to 13.6 percent while using less evaluation budget than comparison methods. The framework also gates changes on attributable evidence so an aggregate score cannot as easily bury a targeted regression; the evidence is benchmark-based rather than a production reliability guarantee.
Why it matters
HarnessLens directs scarce evaluation rollouts toward tasks attributable to each proposed runtime change.
Limits and context
- The framework also gates changes on attributable evidence so an aggregate score cannot as easily bury a targeted regression; the evidence is benchmark-based rather than a production reliability guarantee.
Key claims
HarnessLens directs scarce evaluation rollouts toward tasks attributable to each proposed runtime change.
Qualification: The framework also gates changes on attributable evidence so an aggregate score cannot as easily bury a targeted regression; the evidence is benchmark-based rather than a production reliability guarantee.
Evidence: source-2026-08-28-008
Sources
- arXiv preprint 2608.27311arXiv · primary research
Corrections
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