[BUG] Can not add plugin marketplace source with ssh alias address

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?

If ssh alias is used like this

• ~/.ssh/config

# Work GitHub
Host work
        HostName github.com
        User git
        IdentityFile ~/.ssh/work.pub
        IdentitiesOnly yes

work:company/my-repo.git is valid address but failed to add

<img width="1256" height="442" alt="Image" src="https://github.com/user-attachments/assets/d9b05ea7-e90d-438e-90db-015313cb768e" />

What Should Happen?

should be considered as valid marketplace source

Error Messages/Logs

Steps to Reproduce

1. run /plugin
2. select Add Marketplace
3. enter source like work:company/my-repo.git

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.5

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

IntelliJ IDEA terminal

Additional Information

_No response_