We are pleased to announce that the The KIM-based learning-integrated fitting framework (KLIFF) has reached the milestone 1.0 release, including many new features, bug fixes, and enhancements. For a full list see the Change Log. This release is a result of several years of effort by KIM staff and collaborators to determine and implement necessary features to make KLIFF a powerful and flexible tool for fitting interatomic potentials. We encourage you to check it out for yourself! The installation instructions and the rest of the documentation can be found here.