Copy theme files without publishing the other store

Syncto is still in the studio. It is not on the App Store.

The job it does is narrow. You link a second store, choose which theme files to copy, and read the history afterward. The destination theme does not publish itself. Preview it on that store, click the page those files affect, and publish only when the preview is the store you want shoppers to see.

If one linked store fails, the others still finish. The history names the store that failed. Fix the link and run that store again, without repeating files you already checked.

Whole-theme copy is not offered. Pick the files.