2026 年 Agent Harness 的重要性

We are at a turning point in AI. For years, we focused only on the model. We asked how smart/good the model was. We checked leaderboards and benchmarks to see if Model A beats Model B.

我们正处于 AI 的转折点。多年来，我们只关注模型。我们询问模型有多智能/优秀。我们检查 leaderboards 和 benchmarks，看 Model A 是否击败 Model B。

The difference between top-tier models on static leaderboards is shrinking. But this could be an illusion. The gap between models becomes clear the longer and more complex a task gets. It comes down to durability: How well a model follows instructions while executing hundreds of tool calls over time. A 1% difference on a leaderboard cannot detect the reliability if a model drifts off-track after fifty steps.

顶级模型在静态 leaderboards 上的差异正在缩小。但这可能是一种错觉。模型之间的差距在任务越长越复杂时变得明显。它归结为持久性：模型在长时间执行数百次工具调用时遵循指令的程度。排行榜上的 1% 差异无法检测模型在五十步后偏离轨道时的可靠性。

We need a new way to show capabilities, performance and improvements. We need systems that proves models can execute multi-day workstreams reliably. One Answer to this are Agent Harnesses.

我们需要一种新方法来展示 capabilities、performance 和 improvements。我们需要 systems 来证明 models 可以可靠地执行 multi-day workstreams。针对此的一个答案就是 Agent Harnesses。

What is an Agent Harness?

什么是 Agent Harness？

An Agent Harness is the infrastructure that wraps around an AI model to manage long-running tasks. It is not the agent itself. It is the software system that governs how the agent operates, ensuring it remains reliable, efficient, and steerable.

Agent Harness 是围绕 AI 模型的包装基础设施，用于管理长时间运行的任务。它不是代理本身。它是控制代理操作的软件系统，确保其保持可靠、高效且可控。

It operates at a higher level than agent frameworks. While a framework provides the building blocks for tools or implements the agentic loop. The harness provides prompt presets, opinionated handling for tool calls, lifecycle hooks or ready-to-use capabilities like planning, filesystem access or sub-agent management. It is more than a framework, it comes with batteries included.

它比 agent frameworks 运行在更高的层面。虽然一个 framework 提供了 tools 的 building blocks 或实现了 agentic loop。harness 提供了 prompt presets、tool calls 的 opinionated handling、lif...