> For the complete documentation index, see [llms.txt](https://orderbook-trade.gitbook.io/agent/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://orderbook-trade.gitbook.io/agent/harness/4.1-harness-shi-sha.md).

# 4.1 Harness 是啥

> **Harness 是 Agent 和真实工程环境之间的执行壳。**

<figure><img src="https://2589833248-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FT1fkMMXkpueiN8ez3rts%2Fuploads%2FcSkCzTNaRFGcMRZHqcSs%2FFULLBODYSAFETYHARNESSWITHADJUSTABLEBELTWAISTSUPPORTANDHOOK.png?alt=media&amp;token=9a31bd0a-0347-43bb-8c9a-242cdc5e422c" alt=""><figcaption></figcaption></figure>

当然，这个图有点抽象 哈哈，但是意思和我们之前 2.6 结尾时说的那句话 是保持一致的。

> Harness = 除了模型本身之外的所有东西。

### 为什么需要 Harness

### Harness 的组成

### Agent = Model + Harness