This document contains a summary of updates to the Concourse continuous integration and delivery (CI/CD) platform between versions 1.2.0 through 2.0.0. Key updates include adding the ability to pin builds to specific resource versions in 1.2.0, introducing build and test workflows in a single pipeline in 1.3.0, improving container retention and build log loading in 1.4.0 and 1.5.0, adding official