PreToolUse hook fails with 'hook error (No content)' when path contains spaces

Description

PreToolUse hooks fail silently with "hook error (No content)" when the hook command path contains spaces (e.g., Google Drive paths).

Environment

• Claude Code version: v2.1.5
• OS: macOS (Darwin 24.6.0)
• Path: /Users/.../GoogleDrive-.../My Drive/Intelligence-Vault/

Configuration

"hooks": {
  "PreToolUse": [
    {
      "matcher": "Bash",
      "hooks": [
        {
          "type": "command",
          "command": "/Users/.../My Drive/Intelligence-Vault/.claude/hooks/reject-cd-chaining.py"
        }
      ]
    }
  ]
}

Observed Behaviour

Every Bash tool call fails with:

⏺ Bash(mv wip-prompts/file.md KB-Articles/file.md)
  ⎿  PreToolUse:Bash hook error
  ⎿  (No content)

The hook script itself works correctly when invoked directly from the shell:

echo '{"tool_name":"Bash","tool_input":{"command":"mv test.md out.md"}}' | python3 "/path/with spaces/hook.py"
# Exit code: 0 (correct)

Expected Behaviour

Hook paths containing spaces should be properly escaped/quoted when executed by Claude Code.

Workaround

Remove the hook from settings, or use a path without spaces.

Additional Context

• Tried both $CLAUDE_PROJECT_DIR variable and absolute path - same result
• The hook script has a try/except that calls sys.exit(0) on any exception (fail-open), so the error is occurring before the Python script executes
• Multiple parallel Bash tool calls all fail simultaneously with the same error