- Who it helps
- Developers and researchers expanding agent environments.
- Availability
- The paper first appeared September 3 and was revised September 26. Its abstract and version history are public; runnable artifacts were not checked.
What changes during evaluation
The benchmark introduces capabilities in stages. It separately examines retention of earlier task performance and adaptation to the expanded environment.
A useful regression question
The authors report that expanding the available capabilities can reduce earlier performance. Teams can ask whether saved tasks still pass after adding a tool or skill, alongside testing the new capability.
What you can do
- Inspect the evaluation settings before using the reported results to predict behavior in your own tool collection. Open reference ↗
Where the evidence stops
The abstract supports the research question. Benchmark execution, resource costs and generalization were not independently tested.
Sources read. Sources read October 20, 2026. No installation, model inference or complete external workflow was executed.
Sources & further reading
Paper · paper
EvoHarnessBench: evolving tools, skills and agents ↗
Original evidence for the subject’s scope, availability and limitations.
EvoHarnessBench authors · page checked 2026-10-20 · Published 2026-09-03
Coverage note: The linked evidence establishes the documented scope. Independent execution and complete YouTube, X and community coverage remain unavailable.
The record over time (1)
Dated source checks and published explanations. An observation date can differ from the original release date.
- · Added to Current
EvoHarnessBench evaluates agents while their available tools, reusable skills and specialist agents change over time.