When opening your SGF library when there's nothing in it, you see a delete button for the root collection. <img width="1677" height="375" alt="Image" src="https://github.com/user-attachments/assets/f1beb755-3660-4912-bbc6-1de6ca285a13" />
When opening your SGF library when there's nothing in it, you see a delete button for the root collection.