The source code for the software that runs Hacker News was available at one time. Are the undocumented features, voting ring detectors, and spam detectors not in the released source code? It would make sense that they weren't.
>Are the undocumented features, voting ring detectors, and spam detectors not in the released source code?
Some are, but things like voting ring detection and spam detection aren't. YCombinator doesn't often share the code of changes they make to HN, unfortunately.
