Euclid builds on the Legacy OpenStudio extension originally developed by the National Renewable Energy Laboratory (NREL). Because NREL no longer supports Legacy OpenStudio, Big Ladder Software has taken over maintenance, development, and support of the extension – now renamed as Euclid. Just like its precursor, Euclid will continue to support reading and writing of EnergyPlus geometry in its native IDF format, but will also add new features and capabilities to read and write other energy model formats. Going forward we have awesome plans to add significant new functionality to make the extension an even more useful tool for energy modelers.