[BUG]

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

Slash commands in .claude/commands/ are incorrectly detected as duplicates and not loaded when the project directory is on an NTFS
filesystem (e.g., Parallels-mounted Windows volume, Boot Camp partition, or SMB-mounted NTFS share on macOS).

## Environment

• Claude Code version: 2.1.17
• OS: macOS Darwin 25.2.0
• Filesystem: NTFS volume mounted via Parallels Desktop

## Steps to Reproduce

1. Have a project on an NTFS filesystem with multiple .md files in .claude/commands/
2. Run Claude Code with --verbose and stream-json output
3. Observe that many commands are missing from the slash_commands list
4. Check the debug log at ~/.claude/debug/<session-id>.txt

## Expected Behavior

All valid .md files in .claude/commands/ should be loaded as slash commands.

## Actual Behavior

Many files are skipped with the message:
Skipping duplicate file '...' from projectSettings (same inode already loaded from projectSettings)

Debug log excerpt:
Skipping duplicate file '.../my-command.md' from projectSettings (same inode already loaded from projectSettings)
Deduplicated 27 files in commands (same inode via symlinks or hard links)
Loaded 26 unique skills (managed: 0, user: 0, project: 0, legacy commands: 26)

The files are NOT symlinks or hard links - they have distinct inodes with very large values typical of NTFS (18-19 digits):
5775402362839123726 command-a.md
12514944906203265421 command-b.md
7990210997023112846 command-c.md

## Workaround

Copy affected commands to ~/.claude/commands/ (native APFS filesystem) - they are then recognized correctly.

## Related

Likely related to v2.1.3 fix: "Fixed false skill duplicate detection on filesystems with large inodes (e.g., ExFAT) by using 64-bit precision
for inode values"

The ExFAT fix doesn't fully cover NTFS volumes.

## Impact

• 54 command files in directory, only 26 loaded
• Critical workflow commands silently fail with "Unknown skill" error
• Affects teams using Claude Code on NTFS-based storage

What Should Happen?

## Expected Behavior

All valid .md files in .claude/commands/ should be loaded as slash commands.

Error Messages/Logs

Steps to Reproduce

## Environment

• Claude Code version: 2.1.17
• OS: macOS Darwin 25.2.0
• Filesystem: NTFS volume mounted via Parallels Desktop

## Steps to Reproduce

1. Have a project on an NTFS filesystem with multiple .md files in .claude/commands/
2. Run Claude Code with --verbose and stream-json output
3. Observe that many commands are missing from the slash_commands list
4. Check the debug log at ~/.claude/debug/<session-id>.txt

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

Previous Version

Claude Code Version

2.1.17 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Cursor

Additional Information

_No response_