UndoTree
The undo history visualizer for VIM
...Unlike other editors, where undoing and then accidentally typing something can cause you to lose your edits, Vim allows you to revert to previous states without losing any data, as long as you keep the Vim session alive. If you want to keep your undo history permanently, Vim offers a persistent undo feature. This feature saves your undo history to a file on disk, allowing you to preserve your undo history across editing sessions. To enable persistent undo, refer to the instructions below. This can be a useful option for those who want to maintain a long-term undo history for a file or project.