[BUG] "~/.claude/skills/ YAML files not loaded (v2.1.137 on WSL/Linux)"

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?

I am using Claude Code (v2.1.137) in an Ubuntu Linux (WSL) environment. I created a custom skill file in the global skills directory (~/.claude/skills/daily-report.yaml, and I also tried .md format with frontmatter).

However, the custom skill is completely ignored. When I run the /skills command in the CLI, it returns:
"No skills found. Create skills in .claude/skills/ or ~/.claude/skills/"

According to my debug logs, Claude Code is watching the directory but fails to load anything:
Loading skills from: user=/home/.../.claude/skills
Loaded 0 unique skills (user: 0)
Watching for changes in skill/command directories: /home/.../.claude/skills...

The slash command (e.g., /daily-report) is also not recognized ("Unknown command").

What Should Happen?

Claude Code should successfully parse and load valid .yaml or .md custom skill files located in the ~/.claude/skills/ directory.

When running the /skills command, the custom skills should appear in the list, and I should be able to trigger them using their respective slash commands (e.g., /daily-report).

Error Messages/Logs

Loading skills from: user=/home/duansongtao/.claude/skills
  Loaded 0 unique skills (user: 0)
  Watching for changes in skill/command directories: /home/duansongtao/.claude/skills...

Steps to Reproduce

Environment: Ubuntu Linux (WSL)

1. Create the global skills directory if it doesn't exist:

mkdir -p ~/.claude/skills

1. Create a simple, valid skill file named test-skill.yaml in that directory with the following content:

name: test-skill
description: A simple test skill to verify loading
instructions: You are a test assistant.

### Claude Model

None

### Is this a regression?

Yes, this worked in a previous version

### Last Working Version

 Not sure. This is my first time trying the skills feature on v2.1.137.

### Claude Code Version

 2.1.137 (Claude Code)

### Platform

Anthropic API

### Operating System

Ubuntu/Debian Linux

### Terminal/Shell

WSL (Windows Subsystem for Linux)

### Additional Information

_No response_