[BUG] Skill loads into context and works via the internal Skill tool, but /skill-name and /plugin:skill slash commands return "Unknown 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?

A locally-developed skill loads into context and works via the internal Skill tool, but /skill-name and /plugin:skill slash commands return "Unknown skill."

The skill works fine if it is referenced in text as part of a prompt.

The repo where this is happening is at <https://github.com/awfulwoman/ralph>

What Should Happen?

The skill should be invokable via /skillname

Error Messages/Logs

Steps to Reproduce

A marketplace plugin is installed installed from a local directory.

/plugin marketplace add ./
/plugin install test-plugin@my-local-marketplace

The skill has user-invocable: true set in the frontmatter.

Attempting to invoke the skill via a slash command fails.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.81 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_