[BUG] Agent dedup drops all but one agent on virtual filesystems (Cryptomator/WinFsp) - && should be || in inode guard

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?

Bug: Agent dedup drops all but one agent on virtual filesystems (Cryptomator/WinFsp)

Summary

Claude Code's agent file deduplication silently drops all agent definitions except the first when files are on a virtual filesystem that reports ino = 0 (e.g. Cryptomator via WinFsp, VeraCrypt, network shares).

Environment

• Claude Code 2.1.266 (also reproduced on 2.1.263)
• Windows 11
• Agent definitions stored on a Cryptomator vault (WinFsp mount)
• 4 agent .md files in $CLAUDE_CONFIG_DIR/agents/: architect.md, engineer.md, validator.md, researcher.md

Observed behavior

Only the first agent file enumerated (architect.md) loads. The other three are silently dropped. No error in the UI; the debug log shows Skipping duplicate file ... (same inode already loaded).

Root cause

The dedup function DQr in the bundle:

async function DQr(e) {
    let n = await lstat(e, {bigint: true});
    if (n.dev === 0n && n.ino === 0n) return null;  // skip dedup
    return `${n.dev}:${n.ino}`
}

On WinFsp/Cryptomator, every file reports ino = 0n but dev is nonzero (it's a mounted volume). So every file gets the identity 137085992:0, the first one is kept, and the rest are "duplicates".

The guard checks dev === 0n && ino === 0n (both zero), but should check dev === 0n || ino === 0n (either zero). When ino is zero the filesystem cannot distinguish files, so dedup should be skipped.

What Should Happen?

Suggested fix

if (n.dev === 0n || n.ino === 0n) return null;

One character: && to ||.

Affected scope

This affects not just agents/ but any directory loaded through the same LQr dedup path: .claude/agents/, .claude/commands/, and possibly others. Any user with agent definitions on a Cryptomator, VeraCrypt, Dokany, WinFsp, or network filesystem mount will hit this.

Error Messages/Logs

Steps to Reproduce

Verification

python -c "import os; [print(f'{n}: ino={os.lstat(f\"W:/Claude/agents/{n}.md\").st_ino}') for n in ['architect','engineer','validator','researcher']]"

Output: all ino=0.

Compare with NTFS:

python -c "import os; [print(f'{n}: ino={os.lstat(f\"C:/Users/Alex/Documents/Run/claude/agents/{n}.md\").st_ino}') for n in ['architect','engineer','validator','researcher']]"

Output: all unique nonzero inodes.

Claude Model

Not sure / Multiple models

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude Code 2.1.266

Platform

Other

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_