fx 介面卡將 Harness 執行環境搬至主機
The fx adapter now runs the harness on the host
fx 介面卡現在在主機上執行 HarnessAgent，將模型請求與應用程式共處於同一程序。
- 核心改動：fx 介面卡在主機上執行 HarnessAgent，模型請求與應用程式共處於同一程序。
此更新讓開發者可在同一程序中執行模型請求，簡化部署與安全管理，並支援更豐富的互動功能，如工具過濾與結構化輸出。
The fx adapter for the AI SDK’s HarnessAgent now runs the harness and model requests in the same process as your application. Built-in filesystem and shell operations remain isolated in the sandbox.
The adapter uses libfx, the TypeScript library for fx. It no longer needs to install fx inside the sandbox, run a sandbox bridge, or expose a sandbox port. Model credentials stay on the host rather than being forwarded into the sandbox.
The rewrite also adds:
Built-in tool filtering: choose which built-in tools the agent can use
Mid-turn steering: send new instructions while a turn is running
Structured output: generate responses that match a schema
Image tool results: return images to the model through
toModelOutput()
Sessions can be saved and resumed in a new host process.
Update @ai-sdk/harness-fx to the latest version to use the new adapter. Learn more in the fx harness documentation.