Have you tried this if there is a conflict which is very common - Same file name is already exist in the Given Directory meanwhile only an error info pop-up,
I thought it should be a pop-up window to ask what you need to do like default action after you move or copy a file via Finder or Path Finder.
Here is the screenshot of the default window of Path Finder [sorry , it's in Chinese UI, But nothing special, such as asking for Stop, Overwrite or Keep Both files, blahblah.)
Obviously I didn't do anything to actively handle collisions in my macro above.
The mechanism I'm using is passive.
Keyboard Maestro's Copy a File action will NOT overwrite a file/folder at the destination by design, so any existing files/folders at the destination are safe.
My macro will show a notification if there is a failure, but that's it.
There are ways and means to do as you suggest, but I'm not interested in pursuing them. You on the other hand are quite welcome to take the idea and run with it.
While the Copy a File Action will NOT overwrite an existing file, and will cause the Macro to abort/cancel IF the "Failure Aborts Macro" option is checked, the Write to a File action DOES allow an overwrite of an existing file. The "Failure Aborts Macro" option has no effect on this.