Add the header for KAutoSaveFile, whose purpose is to replace KApplication::tempSaveName() and KApplication::checkRecoverFile() with something more powerful that allows you to:
1) work with URLs, not files
2) work with the same resource in more than one application at a time
3) check for stale autosaves and active ones
4) allow the application to find all autosaves it left behind

This is just the .h. I'm not writing the .cpp. We're going to try a new thing: I'm blogging about this and we'll see if we can get a new developer to adventure into kdecore. I'll coach him with the code.