As mentioned, Run Script doesn't seem to work well in this case. Basically what I'm doing is running a script that uses xcodebuild and a few other commands to archive and export an app using Xcode. There are a few different issues:
xcodebuild generates a LOT of output. I can't find anyway to use Run Script and display the output in a useful way. "Large Text" gives a screen full of tiny text, and a notification gives the first couple of lines. (If it were the last couple, that might work, but still not great.)
It takes a while, so I'd rather see the output as it runs than at the end—otherwise I'm just waiting a while and assuming it's actually working.
There's one case where I need to prompt for a password—though I actually wouldn't mind changing this if I could find a solution for the output problem.