Converting to *Linked* Smart Object?

This version will create linked smart object layers for all selected "normal" top-level raster layers and layer groups. The linked SO PSB files will be automatically saved to the same path as the parent file (this could be changed to a sub-folder if more convenient for file management). A single undo history step is provided.

/*
Selected Layers to Linked Smart Objects.jsx
v1.0, 20th November 2022, Stephen Marsh
https://community.adobe.com/t5/photoshop-ecosystem-discussions/converting-to-linked-smart-object/td-p/13357539
*/

#target photoshop

function main() {

    ///// Process selected layers - from jazz-y /////
    var s2t = stringIDToTypeID;
    (r = new ActionReference()).putProperty(s2t('property'), p = s2t('targetLayersIDs'));
    r.putEnumerated(s2t('document'), s2t('ordinal'), s2t('targetEnum'));
    var lrs = executeActionGet(r).getList(p),
        sel = new ActionReference();
    for (var i = 0; i < lrs.count; i++) {
        sel.putIdentifier(s2t('layer'), p = lrs.getReference(i).getIdentifier(s2t('layerID')));
        (r = new ActionReference()).putIdentifier(s2t('layer'), p);
        (d = new ActionDescriptor()).putReference(s2t("target"), r);
        executeAction(s2t('select'), d, DialogModes.NO);

        /////

        // Conditional check for normal or smart object layers, ignoring other layer kinds such as adjustment layers
        if (activeDocument.activeLayer.kind == LayerKind.NORMAL || activeDocument.activeLayer.kind == LayerKind.SMARTOBJECT) {
            newPlacedLayer();
            placedLayerConvertToLinked();
        }


        ///// Functions /////

        // Convert the active layer to an embedded smart object
        function newPlacedLayer() {
            var s2t = function (s) {
                return app.stringIDToTypeID(s);
            };
            executeAction(s2t("newPlacedLayer"), undefined, DialogModes.NO);
        }

        // Convert the active embedded smart object to a linked smart object
        function placedLayerConvertToLinked() {
            var savePath = activeDocument.path;
            // RegEx remove illegal/invalid filename characters from document name
            var layerName = activeDocument.activeLayer.name.replace(/[:\/\\*\?\"\<\>\|\\\r\\\n.]/g, ""); // "/\:*?"<>|\r\n" -> "-";;
            var idplacedLayerConvertToLinked = stringIDToTypeID("placedLayerConvertToLinked");
            var desc346 = new ActionDescriptor();
            var idnull = stringIDToTypeID("null");
            var ref49 = new ActionReference();
            var idlayer = stringIDToTypeID("layer");
            var idordinal = stringIDToTypeID("ordinal");
            var idtargetEnum = stringIDToTypeID("targetEnum");
            ref49.putEnumerated(idlayer, idordinal, idtargetEnum);
            desc346.putReference(idnull, ref49);
            var idusing = stringIDToTypeID("using");
            desc346.putPath(idusing, new File(savePath + "/" + layerName + ".psb"));
            executeAction(idplacedLayerConvertToLinked, desc346, DialogModes.NO);
        }


    }
}
app.activeDocument.suspendHistory("Selected Layers to Linked Smart Objects", "main()");