[BUG] Why is the `context: fork` skill ineffective?

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

我尝试在skill中使用context: fork，然后运行这个skill时候，并没有启动一个子代理

<img width="949" height="457" alt="Image" src="https://github.com/user-attachments/assets/3d691a02-d73f-4920-a945-23ffd70403d8" />

<img width="730" height="482" alt="Image" src="https://github.com/user-attachments/assets/93998021-6f41-41c9-840f-d5dd45e944ab" />

What Should Happen?

按照context:fork 预期行为去运行，启动一个子代理

Error Messages/Logs

Steps to Reproduce

我尝试在skill中使用context: fork，然后运行这个skill时候，并没有启动一个子代理

<img width="949" height="457" alt="Image" src="https://github.com/user-attachments/assets/3d691a02-d73f-4920-a945-23ffd70403d8" />

<img width="730" height="482" alt="Image" src="https://github.com/user-attachments/assets/93998021-6f41-41c9-840f-d5dd45e944ab" />

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.76

Platform

Other

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_