On Thursday June 6th at the Personal Democracy Forum (an annual conference exploring technology’s influence on politics and government), New York City’s Comptroller John Liu announced that the code behind Checkbook NYC 2.0, the city's transparency spending web portal, had been open-sourced and made available for forking on Checkbook NYC 2.0's github page. This is significant because (1) Checkbook 2.0 is enormous: it makes over $70 billion dollars in New York City spending available online in a timely, structured, and human-readable form, demonstrating that best practices in data disclosure can be followed even at scale; (2) it marks a shift to proactive civic application-sharing, by the way of the municipality’s desire to share the resources they’ve developed with other local (and even state) governments and NYC’s partnership with common municipal software vendors in this endeavor; and (3) it raises questions about what’s next for government transparency tools, civic software partnerships, and reuse.