I'd like to find or write an editor tool that adds to the warning, "The referenced script on this behaviour is missing!" with the name of the script. Since the serialized behaviour stores no meta information about the referenced script, I'll need to create a shareable cache of the meta information here that updates on asset import. Does anyone have any experience with something like that or know any tools that are doing something similar? Maybe a simpler tool is a script that can scan version control diffs for that missing GUID? What workarounds do you have for this type of problem?