All Foursquare code lives in a single repository, an architecture generally called a monorepo. Fsq.io is a subset of that internal monorepo. Fsq.io holds many of Foursquare's open source projects that had previously lived in their own separate Github repos. Foursquare contributes to a build tool specifically designed to work with monorepos called Pants. The entire Fsq.io repo is is built and tested by Pants.Deploying directly from our monorepo has some nice advantages, for consumers of our open source projects as well as Foursquare itself. The entire repo is built daily by our CIs and internal contributions are open sourced automatically without the overhead of publishing. This repo will always contain the latest code that we use internally, all of the tools can be built just as we use them, directly from HEAD.