That's right. The entire Delphi source of KIDE, the Integrated Development Environment that makes writing and maintaining Kitto applications easier, was just added to Kitto's git repo.
You can download and build the code with Delphi XE8, 10.1 or 10.2. It shouldn't be difficult to build it in other (modern) versions as well. If you do, please share your changes through a pull request.