Undotree is a Vim plugin that visualizes the undo history and allows users to browse and switch between different undo branches.
Vim stores the entire edit history as a tree structure rather than a linear sequence, which means that undoing a change and then making a new edit does not discard the original branch. Most editors lose that history, but Vim preserves it. Undotree exposes this tree visually so you can navigate between diverging branches of edits. The plugin modifies the buffer temporarily to switch between states without writing to disk, making all changes reversible with a single action.
Undotree suits developers and writers who work with Vim and want to recover from complex editing sequences where they have undone changes and then made new edits. It is particularly valuable for those who want to explore multiple editing paths without losing work. The plugin works within Vim's native undo system and does not replace it; users can optionally enable Vim's persistent undo feature to save undo history across sessions.
The project receives occasional maintenance and bug fixes. Development activity shows responsiveness to user-reported issues and pull requests.
