Mostly just a good text editor and/or a shell login and hitting the refresh button in the browser with the Console tab (Ctrl+Alt+C) open or nitpicking details from extensive unreadable garbage text dumps or test output.
It usually takes a lot longer to develop a new hack than the quick hacks shown in short cutscenes. Once it’s well known though, 10-30 seconds can be enough to deploy or that can be automated.
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