Claude Fable始终积极主动

11th June 2026

2026年6月11日

After two days of experience with Claude Fable 5 I think the best way to describe it is relentlessly proactive. It knows a whole lot of tricks and it will deploy pretty much any of them to get to its goal.

在体验了两天 Claude Fable 5 之后，我认为描述它最好的方式是极其主动。它知道很多技巧，并且为了实现目标几乎会动用其中任何一个。

I’ll illustrate this with an example. I was hacking on Datasette Agent today when I noticed a glitch: a horizontal scrollbar that shouldn’t be there in the jump menu chat prompt. I snapped this screenshot:

我将用一个例子来说明这一点。今天我在开发 Datasette Agent 时注意到一个故障：跳转菜单聊天提示框中出现了一个不该有的水平滚动条。我截了这张图：

Then I started a fresh claude session in my datasette-agent checkout, dragged in the screenshot and told it:

然后我在我的 datasette-agent 检出目录中启动了一个全新的 claude 会话，拖入截图并告诉它：

Look at dependencies to help figure out why there is a horizontal scrollbar here

Look at dependencies to help figure out why there is a horizontal scrollbar here

I had a hunch the cause was in a dependency of Datasette Agent (likely Datasette itself) and I knew Fable was good at digging into dependency code, either by inspecting installed files in its own virtual environment site-packages or by referencing a local checkout on disk. Telling it to start with dependencies felt like a good bet.

我有一种预感，原因出在 Datasette Agent 的某个依赖项中（很可能是 Datasette 本身），而且我知道 Fable 擅长深入研究依赖代码，无论是通过检查其自身虚拟环境 site-packages 中已安装的文件，还是通过引用磁盘上的本地检出。让它从依赖项开始排查感觉是个不错的选择。

I got distracted by a domestic task and wandered away from my computer.

我被一件家务事分了心，离开了电脑。

When I came back a few minutes later I saw my machine open a browser window in my regular Firefox and then navigate to the dialog in question. I had not told Claude Code to use any browser automation, and I was pretty sure it wasn’t possible for it to trigger mouse movements or keyboard shortcuts within a window, so how was it doing that?

几分钟后我回来时，看到我的机器在我的常规 Firefox 中打开了一个浏览器窗口，然后导航到了相关对话框。我并没有告诉 Claude Code 使用任何浏览器自动化，而且我很肯定它不可能在窗口内触发鼠标移动或键盘快捷键，那它是怎么做到的？

I watched in fascination as it continued with its explorations, then saw it open a Safari window i...