Gets the path of active transcripts for the current runspace. Utilizes unsupported code, use at your own risk.

Get-ActiveTranscriptPath.ps1

function Get-ActiveTranscriptPath {
    [CmdletBinding()]
    param()
    end {
        $flags = [System.Reflection.BindingFlags]'Instance, NonPublic'
        $transcriptionData = $Host.Runspace.GetType().
            GetProperty('TranscriptionData', $flags).
            GetValue($Host.Runspace)
        
        $transcripts = $transcriptionData.GetType().
            GetProperty('Transcripts', $flags).
            GetValue($transcriptionData)
        
        if (-not $transcripts) {
            return
        }
        
        foreach ($transcript in $transcripts) {
            $transcript.GetType().
                GetProperty('Path', $flags).
                GetValue($transcript)
        }
    }
}