Agent harnesses are executable code that defines the prompts, tools, and control flow wrapped around a language model. As the arXiv abstract explains, this code determines how the model is used in a given application.
However, a single global harness can fail when tasks are heterogeneous and require different execution strategies. The paper identifies this limitation before the abstract cuts off with 'In this…'.
Judging by the title, the authors propose to evolve agent harnesses using object-oriented design. Because the source is truncated, the article cannot verify the specific mechanisms, findings, or results. The only available conclusion is that heterogeneous tasks call for more flexible harness structures.