Script photoshop/illustrator

This would offer a dialog for file selection, open the selected files, duplicate the lowest layer, convert it to a smart object, save the image as a psd and open the smart object. 

// 2022, use it at your own risk;
var theSourceFiles = selectFile (true);
if (theSourceFiles != null) {
    for (var m = 0; m < theSourceFiles.length; m++) {
        var thisFile = app.open(File(theSourceFiles[m]));
        var theDup = thisFile.layers[thisFile.layers.length - 1].duplicate();
        thisFile.activeLayer = theDup;
        theDup.name = thisFile.name;
        convertToSmartObject();
        saveAsPsd (thisFile, thisFile.path, thisFile.name.match(/(.*)\.[^\.]+$/)[1], false);
        openSmartObject();
    };
};
////// select file //////
function selectFile (multi) {
    if (multi == true) {var theString = "please select files"}
    else {var theString = "please select one file"};
    if ($.os.search(/windows/i) != -1) {var theFiles = File.openDialog (theString, '*.jpg;*.tif;*.png', multi)}
    else {var theFiles = File.openDialog (theString, getFiles, multi)};
    ////// filter files  for mac //////
    function getFiles (theFile) {
        if (theFile.name.match(/\.(jpg|tif|psd|png)$/i) || theFile.constructor.name == "Folder") {
            return true
            };
        };
    return theFiles
    };
////// open smart object //////
function openSmartObject () {
    var idplacedLayerEditContents = stringIDToTypeID( "placedLayerEditContents" );
    var desc2 = new ActionDescriptor();
    executeAction( idplacedLayerEditContents, desc2, DialogModes.NO );
    return activeDocument;
    };
////// convert to smart object //////
function convertToSmartObject () {
var desc108 = new ActionDescriptor();
var ref77 = new ActionReference();
ref77.putEnumerated( charIDToTypeID( "Mn  " ), charIDToTypeID( "MnIt" ), stringIDToTypeID( "newPlacedLayer" ) );
desc108.putReference( charIDToTypeID( "null" ), ref77 );
executeAction( charIDToTypeID( "slct" ), desc108, DialogModes.NO );
};
////// save psd //////
function saveAsPsd (thedoc, docPath, basename, overwrite) {
// check for existing file
    if (overwrite == false && File(docPath+'/'+basename+'.psd').exists == true) {
        var theConfirm = confirm("overwrite existing file");
        if (theConfirm == false) {return false}
        };
// make copy and save
    if (app.documents.length > 0) {
    try {
    saveOpts = new PhotoshopSaveOptions();
    saveOpts.embedColorProfile = true;
    saveOpts.alphaChannels = true;
    saveOpts.layers = true;
    saveOpts.spotColors = true;
    thedoc.saveAs((new File(docPath+'/'+basename+'.psd')),saveOpts,false);
    }
    catch (e) {docName+" failed"}
    }
    };

Then 

openSmartObject();
////// open smart object //////
function openSmartObject () {
    var idplacedLayerEditContents = stringIDToTypeID( "placedLayerEditContents" );
    var desc2 = new ActionDescriptor();
    executeAction( idplacedLayerEditContents, desc2, DialogModes.NO );
    return activeDocument;
    };

schould suffice (provided the SO is the active Layer).