[Windows] User-level ~/.claude/commands/ only loads the first .md file

Bug Description

On Windows, custom slash commands placed in the user-level ~/.claude/commands/ directory only load the first valid .md file (sorted alphabetically). All other command files are silently ignored.

Project-level .claude/commands/ works correctly and loads all files.

Environment

• Claude Code version: 2.1.34
• OS: Windows 10
• Shell: bash (Git Bash)
• Note: The same command files work correctly on Linux

Steps to Reproduce

1. Place multiple .md files in ~/.claude/commands/:

``
~/.claude/commands/
├── analyze.md
├── build.md
├── debug.md
├── expert.md
└── test.md
``

1. Start Claude Code
2. Type / and observe autocomplete — only analyze appears (first alphabetically)
3. Try /build → Unknown skill: build
4. Try /test → Unknown skill: test

Verification

• Renamed analyze.md → _analyze.md (underscore prefix, gets skipped)
• Result: build.md became the only recognized skill (next valid file alphabetically)
• Files starting with _ are ignored entirely
• Restored original filename → analyze is recognized again, others still ignored
• Subdirectory commands/sc/ also affected — /sc:build returns Unknown skill

Summary Table

| Scope | Behavior |
|-------|----------|
| User-level ~/.claude/commands/ | Only 1st .md file loaded (BUG) |
| Project-level .claude/commands/ | All files loaded correctly |
| Subdirectory commands/sc/ (user-level) | Not loaded at all |
| Linux (same files) | All files loaded correctly |

Additional Details

• All files have identical encoding (UTF-8), line endings (LF), permissions (readable), no BOM
• claude doctor shows no related warnings
• File format (with or without YAML frontmatter) does not affect the issue
• Copying a file to project-level .claude/commands/ makes it immediately recognized