[Bug] @agent command fails to list custom agents in PowerShell on Windows

Bug Description
Bug in Claude Code for Windows when running in PowerShell: the @agent command does not list custom agents available in the project. It only works correctly when running
via WSL (Windows Subsystem for Linux). In PowerShell, custom agents configured in .claude/agents/ do not appear in the listing, while in WSL all are displayed normally.

Environment Info

• Platform: win32
• Terminal: mintty
• Version: 2.0.10
• Feedback ID:

Errors

[{"error":"Error\n    at CA (B:/~BUN/root/claude.exe:530:1074)\n    at <anonymous> (B:/~BUN/root/claude.exe:531:9903)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:861:50)\n    at processTicksAndRejections (native:7:39)\n    at spawnSync (unknown)\n    at spawnSync (node:child_process:226:22)\n    at execSync (node:child_process:275:109)\n    at Z (B:/~BUN/root/claude.exe:1312:8000)\n    at KbY (B:/~BUN/root/claude.exe:1312:8178)\n    at request (B:/~BUN/root/claude.exe:533:2088)\n    at processTicksAndRejections (native:7:39)\n    at spawnSync (unknown)\n    at spawnSync (node:child_process:226:22)\n    at execSync (node:child_process:275:109)\n    at Z (B:/~BUN/root/claude.exe:1312:8000)\n    at KbY (B:/~BUN/root/claude.exe:1312:8178)\n    at HbY (B:/~BUN/root/claude.exe:1312:8708)\n    at HbY (B:/~BUN/root/claude.exe:1312:8831)\n    at W (B:/~BUN/root/claude.exe:528:14227)","timestamp":"2025-10-07T22:39:46.318Z"},{"error":"AbortError: The operation was aborted.\n    at unknown\n    at abortChildProcess (node:child_process:947:42)\n    at onAbortListener2 (node:child_process:35:24)\n    at abort (unknown)","timestamp":"2025-10-07T22:39:54.683Z"},{"error":"AbortError: The operation was aborted.\n    at unknown\n    at abortChildProcess (node:child_process:947:42)\n    at onAbortListener2 (node:child_process:35:24)\n    at abort (unknown)","timestamp":"2025-10-07T22:39:57.615Z"},{"error":"Error: Failed to create shell snapshot: Command failed: C:\\Program Files\\Git\\bin\\bash.exe -c -l SNAPSHOT_FILE='C:\\Users\\tjaba\\.claude\\shell-snapshots\\snapshot-bash-1759876787012-3w0vrx.sh'\n      # No user config file to source\n      \n      # First, create/clear the snapshot file\n      echo \"# Snapshot file\" >| \"$SNAPSHOT_FILE\"\n      \n      # When this file is sourced, we first unalias to avoid conflicts\n      # This is necessary because aliases get \"frozen\" inside function definitions at definition time,\n      # which can cause unexpected behavior when functions use commands that conflict with aliases\n      echo \"# Unset all aliases to avoid conflicts with functions\" >> \"$SNAPSHOT_FILE\"\n      echo \"unalias -a 2>/dev/null || true\" >> \"$SNAPSHOT_FILE\"\n      \n      echo \"shopt -s expand_aliases\" >> \"$SNAPSHOT_FILE\"\n      \n      \n      # Check for rg availability\n      echo \"# Check for rg availability\" >> \"$SNAPSHOT_FILE\"\n      echo \"if ! command -v rg >/dev/null 2>&1; then\" >> \"$SNAPSHOT_FILE\"\n      echo '  alias rg='\"''\\''C:\\Users\\tjaba\\.local\\bin\\claude.exe'\\'' --ripgrep'\" >> \"$SNAPSHOT_FILE\"\n      echo \"fi\" >> \"$SNAPSHOT_FILE\"\n      \n      # Add PATH to the file\n      echo \"export PATH=\\$PATH\" >> \"$SNAPSHOT_FILE\"\n  \n      \n      # Exit silently on success, only report errors\n      if [ ! -f \"$SNAPSHOT_FILE\" ]; then\n        echo \"Error: Snapshot file was not created at $SNAPSHOT_FILE\" >&2\n        exit 1\n      fi\n    \n    at <anonymous> (B:/~BUN/root/claude.exe:1297:138)\n    at <anonymous> (B:/~BUN/root/claude.exe:1295:1776)\n    at exitHandler (node:child_process:109:27)\n    at emit (node:events:98:22)\n    at #maybeClose (node:child_process:778:16)\n    at #handleOnExit (node:child_process:532:72)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-10-07T22:40:03.734Z"},{"error":"Error\n    at CA (B:/~BUN/root/claude.exe:530:1074)\n    at <anonymous> (B:/~BUN/root/claude.exe:531:9903)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:861:50)\n    at processTicksAndRejections (native:7:39)\n    at request (B:/~BUN/root/claude.exe:533:2088)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-10-07T22:46:41.504Z"}]