[BUG] Plugin skills not user-invocable via /skill-name after 2.1.3 skills/commands merge

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?

According to v2.1.3 changelog: "Merged Slash Commands and Skills - Simplified mental model".

After this merge, local skills (in .claude/skills/) can be user-invoked via /skill-name. However, plugin skills cannot be invoked the same way.

• Local skill: /my-local-skill → Works ✅
• Plugin skill: /my-plugin-skill or /plugin-name:skill-name → Not available in suggestions, cannot invoke ❌

Plugin skills are only model-invocable, not user-invocable like local skills.

What Should Happen?

Plugin skills should be user-invocable via /skill-name (or /plugin-name:skill-name) just like local skills, following the 2.1.3 "simplified mental model" of merged skills and commands.

Both local and plugin skills should have consistent invocation behavior.

Error Messages/Logs

Steps to Reproduce

None

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.1.4

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_