[BUG] LLM is trying to invoke a non-exist tool: \"Skill\"

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?

My Claude Code version is v2.1.52.
I created a local CC configuration in my local path and wrote some custom skills.
When triggering these skills, I occasionally get this error:

⎿  API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"LLM is trying to invoke a non-exist tool: \"Skill\", you can add some few shots examples or adjust the prompt."}}

At the same time, Ctrl+O displays the details: *****,我应该使用Skill工具来调用skill-fm-ml_claw_pipeline。

What Should Happen?

claude should use my custom skill successfully

Error Messages/Logs

⎿  API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"LLM is trying to invoke a non-exist tool: \"Skill\", you can add some few shots examples or adjust the prompt."}}

Steps to Reproduce

1. open a new cc session
2. descript my requirements

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

v2.1.52

Platform

Other

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_