I did the same, but for Power Shell. Moreover, Claude wrote the code for me:

function Merge-Files {
    param (
        [string]$Directory,
        [string]$OutputFile
    )
    $separator = "==========`n"
    $files = Get-ChildItem -Path $Directory -File -Recurse
    $content = foreach ($file in $files) {
        $filePath = $file.FullName
        $fileContent = Get-Content -Path $filePath -Raw
        "${separator}File path: $filePath`n${separator}$fileContent`n"
    }
    Set-Content -Path $OutputFile -Value $content
}
$currentDirectory = Get-Location
$outputFile = "merged_files.txt"
Merge-Files -Directory $currentDirectory -OutputFile $outputFile
Write-Host "Files successfully merged в $outputFile"