Problem

On Windows, inbound images fail with Local media path is not safe to read / path changed during read. The root cause is a false-positive in openVerifiedLocalFile where handle.stat() and fs.lstat() return different dev values on Windows, causing the path-mismatch check to throw even though the file is stable and not a symlink.

Root Cause

In src/infra/fs-safe.ts:

const [stat, lstat] = await Promise.all([handle.stat(), fs.lstat(filePath)]);
if (stat.ino !== lstat.ino || stat.dev !== lstat.dev) {
  throw new SafeOpenError("path-mismatch", "path changed during read");
}

On Windows, handle.stat().dev differs from fs.lstat().dev even for the same file. This triggers the error even though the file is stable and not a symlink.

Fix

Introduce a statsMatch() helper that:

• Always compares inode (ino) values
• Skips device ID (dev) comparison on Windows where it's unreliable
• Maintains full comparison on Unix platforms

function statsMatch(stat1: Stats, stat2: Stats): boolean {
  if (stat1.ino !== stat2.ino) {
    return false;
  }
  // On Windows, dev values are unreliable across different stat sources
  if (process.platform !== "win32" && stat1.dev !== stat2.dev) {
    return false;
  }
  return true;
}

Testing

• All 7 existing tests pass
• pnpm build passes
• pnpm lint passes

Fixes #25699

Greptile Summary

Fixes Windows media path verification by introducing a statsMatch() helper that skips unreliable device ID (dev) comparison on Windows while maintaining inode (ino) verification. The fix resolves false-positive "path changed during read" errors when handle.stat() and fs.lstat() return different device IDs for the same file on Windows.

• Introduced statsMatch() helper function with platform-specific stat comparison logic
• Maintains full dev + ino verification on Unix platforms
• Skips dev comparison on Windows where it's known to be unreliable
• Tests pass and the fix is well-documented in code comments

The approach is reasonable for Windows compatibility, though consider aligning with the existing sameFileIdentity() pattern in src/infra/safe-open-sync.ts which uses a more targeted fallback (checking if either dev is 0 rather than unconditionally skipping dev comparison).

Confidence Score: 4/5

• This PR is safe to merge with minimal risk - it fixes a real Windows bug without weakening security
• The fix correctly addresses a known Windows platform limitation where device IDs are unreliable. Inode comparison remains intact for file identity verification, symlink checks are preserved, and all existing tests pass. The only consideration is alignment with the existing sameFileIdentity() pattern in safe-open-sync.ts, but the current approach is valid and well-documented.
• No files require special attention

_{Last reviewed commit: f59ed21}

Context used:

• Context from dashboard - CLAUDE.md (source)