Despite their central importance to a variety of endeavors and despite widespread use in both industry and academia, version control systems (software for tracking versions of files) have not been extensively studied in fields related to technical communication, rhetoric, and communication design. Git, by far the most dominant version control system today, is largely absent. This study theorizes Git as boundary infrastructure---infrastructure used to facilitate collaboration across disciplines and domains. The unique characteristics of boundary infrastructure explain how something as prominent as Git can be so invisible and help identify dangers posed by boundary infrastructure. Drawing on modes of resistance developed in feminist rhetorics, this article concludes with suggestions to ameliorate the negatives effects such infrastructure might have on collaborative knowledge work.

This article explores rhetorical practices underlying productive deliberation about climate change. We analyze discussion of climate change on a Reddit subforum to demonstrate that good-faith deliberation---which is essential to deliberative democracy---exists online. Four rhetorical concepts describe variation among this subforum's comments: William Keith's distinction between 'discussion' and 'debate,' William Covino's distinction between good and bad magic, Kelly Oliver's notion of ethical response/ability, and Krista Ratcliffe's notion of rhetorical listening. Using a three-part taxonomy based on these concepts, we argue that collaborative climate change deliberation exists and that forum participation guidelines can promote productive styles of engagement.