[BUG] Claude Cowork for Windows, plugin skills searched at wrong location

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?

Claude Cowork for Windows tries to load the plugin skills from a wrong path resulting in skills not being able to load. (see repro steps for details)

What Should Happen?

Expected:
Skill is successfully invoked and executed

Error Messages/Logs

Steps to Reproduce

Repro:

• In Claude Cowork for Windows install one of the available Anthropic plugins, for example Sales.
• Try using one of the skills available in the plugin, e.g. saying "Use account-research skill to research Anthropic company".

Actual:
Claude Cowork thinks the skills is mounted in location like this:
/sessions/{session-name}/mnt/.local-plugins/../../../../../../Local/Packages/Calude_pzs8sxrjxfjjc/LocalCache/Roaming/Claude/local-agent-mode-sessions/{session-number}/{some-other-number}/cowork_plugins/[key-part-of-the-path]

while in reality it is located in following location:
/sessions/{sesion-name}/mnt/.local-plugins/[key-part-of-the-path]

This makes it impossible to use plugins and their skills on Windows in current Claude Cowork version

<img width="965" height="529" alt="Image" src="https://github.com/user-attachments/assets/ebbc71fc-9bc5-4db0-b1da-0e6ac1dc4e3f" />

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude 1.1.2685 (f39a62)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

_No response_