[BUG] Skills from plugins do not expose commands to "/"

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?

Skills installed from plugins do not expose slash-commands to claude code.

What Should Happen?

According to skills documentation, skills should create a separate /command in claude code. This work well for skills defined in workspace under in ".claude/skills/.." directory or claude code's default configuration directory, but not with skills inside plugins.

Error Messages/Logs

Steps to Reproduce

1. Install plugin https://github.com/anthropics/claude-code/tree/main/plugins/plugin-dev from official marketplace
2. Restart claude code
3. Check there is no new slash command appeared in Claude Code with the names of skills in plugin (should be prefixed with plugin namespace)

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.17 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_