DeepSeek Harness Plugin: Rollback and Undo Options for DeepSeek Harness Coding Sessions

The DeepSeek Harness Rewind plugin is designed to address the difficulty of rolling back agent work. It saves snapshots in a separate shadow repository, providing a “time travel” capability that allows users to restore to any historical state at any time without affecting their local Git repository. The plugin supports command-line operations (such as `/rewind`) and GUI interaction, and includes file filtering and reversible restoration features. By default, it is limited to manual user actions, but can be configured to allow agent access. Snapshot data is stored in `$DSH_HOME/rewind/`, and the plugin automatically cleans up old session data that has not been updated for more than 30 days.