Auto-Save File After Creating Contact Sheet

Run the Contact Sheet II script.

Then run the following script. It will save all open docs to PSD into a user selected folder, using the original document name.

/* 

Save All Open Docs to PSD.jsx
Stephen Marsh 2021

Auto-Save File After Creating Contact Sheet
https://community.adobe.com/t5/photoshop/auto-save-file-after-creating-contact-sheet/td-p/11879020

*/

/* Start Open Document Error Check - Part A: If */
if (app.documents.length > 0) {

    /* Main Code Start */

    (function () {

        // Select the output folder
        var outputFolder = Folder.selectDialog('Please select the save folder:');
        if (outputFolder === null) return;

        // Count open files
        var openFileCount = app.documents.length;

        // Loop through all open docs until no docs are open
        while (app.documents.length > 0) {
            saveOpenDocs();
        }

        // End of script notification
        alert(openFileCount + ' files saved to:' + '\r' + outputFolder.fsName);

        function saveOpenDocs() {
            var docName = app.activeDocument.name;
            var saveFilePSD = new File(new File(outputFolder + '/' + docName + '.psd'));
            SavePSD(saveFilePSD);
            app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);

            // Setup PSD options
            function SavePSD(saveFilePSD) {
                psdSaveOptions = new PhotoshopSaveOptions();
                psdSaveOptions.embedColorProfile = true;
                psdSaveOptions.alphaChannels = true;
                psdSaveOptions.layers = true;
                psdSaveOptions.annotations = true;
                psdSaveOptions.spotColors = true;
                app.activeDocument.saveAs(saveFilePSD, psdSaveOptions, true, Extension.LOWERCASE);
            }
        }

    })();

    /* Main Code Finish */
}
/* Finish Open Document Error Check - Part A: If */

/* Start Open Document Error Check - Part B: Else */
else {

    alert('A document must be open to use this script!');

}
/* Finish Open Document Error Check - Part B: Else */

https://prepression.blogspot.com/2017/11/downloading-and-installing-adobe-scripts.html

A brand new unsaved file has to be provided options when saving (file format and options, location and possibly a new name).

This could be automated with a script that saves and closes all open files with a predetermined file type and options.

One could automate this into an action or script so that one could select and setup the contact sheet, then auto save/close.