[BUG] /skills dialog shows duplicate entries for user-defined skills

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?

Description:
When a skill is defined in ~/.claude/skills/<name>/SKILL.md, it appears twice in the /skills dialog. The skill itself works correctly — the duplication is purely a display issue.

Steps to reproduce:

1. Create a skill at ~/.claude/skills/changes/SKILL.md with user-invocable: true
2. Open the /skills dialog
3. Observe the skill listed twice

Expected: Each skill appears once.

Actual: The skill appears twice in the list. The system-prompt skill listing also shows 4 entries (2 with trailing period, 2 without).

Environment:

• Claude Code version: (check with claude --version)
• Platform: macOS 14.6

What Should Happen?

Expected: Each skill appears once.

Error Messages/Logs

Steps to Reproduce

/skills

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.112

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_