[BUG] --resume fails on Windows with Google Drive mapped drives — CWD resolves to C:\Windows instead of actual path

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?

When running Claude Code from a Google Drive virtual/mapped drive (H:\) on Windows, claude --resume <session-id> silently fails and returns to the shell prompt with no output. The --resume picker also doesn't show any previous sessions.

Root cause: Claude Code resolves the CWD to C:\Windows instead of the actual Google Drive path (H:\Shared drives\App\Power Optimisation Rules and Logic). This causes:

1. New sessions are stored in the C--Windows project directory instead of H--Shared-drives-App-Power-Optimisation-Rules-and-Logic
2. 2. --resume looks in the wrong project directory and can't find old sessions
3. 3. The sessions-index.json in the correct directory is never read

Evidence from JSONL transcripts:

• Old sessions (v2.1.44): "cwd":"H:\\Shared drives\\App\\Power Optimisation Rules and Logic" — correct
• - New sessions (v2.1.47): "cwd":"C:\\Windows" — incorrect, despite PowerShell prompt showing H:\Shared drives\App\Power Optimisation Rules and Logic>

This is a regression — sessions created with v2.1.44 from the same path worked correctly. The path resolution changed between v2.1.44 and v2.1.47.

Related to #24140 (Windows + network drive path resolution issues).

What Should Happen?

1. claude --resume <session-id> should find and resume sessions created from Google Drive mapped drives
2. 2. Claude Code should resolve the CWD to the actual mapped drive path (e.g., H:\Shared drives\...) rather than falling back to C:\Windows
3. 3. New sessions should be stored in the same project directory as old sessions when launched from the same path
4. 4. The --resume picker should show all previous sessions for the project

Error Messages/Logs

Steps to Reproduce

1. Have Google Drive for Desktop installed with a mapped drive letter (e.g., H:\)
2. 2. Open PowerShell and cd to a project on the Google Drive: cd "H:\Shared drives\App\Power Optimisation Rules and Logic"
3. 3. Run claude and have a conversation, then /exit — note the session ID shown
4. 4. Run claude --resume <session-id> from the same directory
5. 5. Observe: silent failure, returns to shell prompt with no output
6. 6. Run claude --resume (no ID) to open the picker
7. 7. Observe: only very recent sessions appear, not previous ones

Key detail: This worked correctly on v2.1.44. The regression occurs on v2.1.47 (or between those versions). Old sessions have correct CWD in their JSONL, new sessions show C:\Windows.

Verification: Check ~/.claude/projects/ — you'll find:

• H--Shared-drives-App-.../*.jsonl — old sessions (correct, created by v2.1.44)
• - C--Windows/*.jsonl — new sessions (wrong, created by v2.1.47)

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.44

Claude Code Version

2.1.47

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

Environment:

• Windows 11 Pro 10.0.26200
• - Google Drive for Desktop (provides virtual H:\ drive)
• - - PowerShell in Windows Terminal
• - - - Claude Code v2.1.44 (worked) → v2.1.47 (broken)

Impact: All previous sessions (28 in this project) become inaccessible via --resume. The JSONL transcript files still exist on disk at ~/.claude/projects/H--Shared-drives-App-Power-Optimisation-Rules-and-Logic/ but Claude Code now looks in ~/.claude/projects/C--Windows/ because it resolves the Google Drive virtual path incorrectly.

Likely root cause: The Node.js process.cwd() or path resolution logic changed between v2.1.44 and v2.1.47 in a way that doesn't properly handle Windows virtual/mapped drives (Google Drive File Stream). The drive letter H:\ is no longer resolved to the actual path, and falls back to C:\Windows.

Workaround attempted: Manually copying session index entries from the old project directory to the new one. This did not work — the --resume picker still only shows sessions created by the new version.