How to get the stroke size of a shape layer.

try {

// Works only in Photoshop CC

var the_layer = activeDocument.activeLayer;

var r = new ActionReference();
r.putProperty(stringIDToTypeID("property"), stringIDToTypeID("AGMStrokeStyleInfo"));
r.putIdentifier(stringIDToTypeID("layer"), the_layer.id);

var ret = executeActionGet(r).getObjectValue(stringIDToTypeID("AGMStrokeStyleInfo")).getUnitDoubleValue(stringIDToTypeID("strokeStyleLineWidth"));

alert(ret);

} catch (e) { alert(e.line+ "\n\n" +e); }