[Bug] /statusline generates bash/Unix commands on native Windows

Description

The /statusline skill generates a statusline command using bash/Unix syntax (cat, jq, basename, echo) even when running on native Windows. The generated command silently fails, resulting in no statusline being displayed after restart.

Environment

• Claude Code version: 2.1.37 (native Windows binary, not Node)
• OS: Windows 11
• Shell: PowerShell / cmd.exe

Steps to Reproduce

1. Run /statusline on Windows
2. Request a statusline showing directory, git branch, model name, and context usage
3. The skill generates a command using bash syntax:

``json
"statusLine": {
"type": "command",
"command": "input=$(cat); cwd=$(echo \"$input\" | jq -r '.workspace.current_dir'); model=$(echo \"$input\" | jq -r '.model.display_name'); used=$(echo \"$input\" | jq -r '.context_window.used_percentage // empty'); git_branch=\"\"; if git rev-parse --git-dir > /dev/null 2>&1; then git_branch=$(git -c core.useBuiltinFSMonitor=false branch --show-current 2>/dev/null || echo \"\"); [ -n \"$git_branch\" ] && git_branch=\" [$git_branch]\"; fi; dir_name=$(basename \"$cwd\"); status=\"${dir_name}${git_branch} | ${model}\"; [ -n \"$used\" ] && status=\"${status} | Context: $(printf \"%.1f\" \"$used\")%\"; echo \"$status\""
}
``

1. Restart Claude Code
2. No statusline appears

Expected Behavior

On Windows, the /statusline skill should either:

• Generate a PowerShell-compatible command (e.g., powershell -NoProfile -File <script>)
• Detect the platform and generate platform-appropriate syntax
• Document that the feature requires a bash-compatible shell on Windows

Workaround

Manually create a PowerShell script and update ~/.claude/settings.json to reference it:

~/.claude/statusline.ps1:

$jsonInput = [Console]::In.ReadToEnd()
$data = $jsonInput | ConvertFrom-Json

$cwd = $data.workspace.current_dir
$model = $data.model.display_name
$used = $data.context_window.used_percentage

$dirName = Split-Path -Leaf $cwd
$status = "$dirName"

try {
    $branch = git branch --show-current 2>$null
    if ($branch) {
        $status += " [$branch]"
    }
} catch {}

$status += " | $model"

if ($used) {
    $rounded = [Math]::Round([double]$used, 1)
    $status += " | Context: ${rounded}%"
}

Write-Output $status

~/.claude/settings.json:

"statusLine": {
  "type": "command",
  "command": "powershell -NoProfile -File C:\path\to\.claude\statusline.ps1"
}

Related Issues

• #23994 — StatusLine not executing in VS Code on Windows (Node version)
• #12870 — Status line output truncated on Windows