The MrDoc Sync plugin connects your local vault with the self-hosted MrDoc knowledge base, enabling seamless two-way synchronization between local markdown files and online documents. It keeps vaults and MrDoc collections in sync, automatically managing file creation, renaming, modification, and deletion while maintaining accurate mapping relationships. Users can manually or automatically push updates to MrDoc, pull remote changes, or enable real-time synchronization for instant updates. The plugin also handles image uploads, automatically transferring pasted or dragged images to MrDoc and updating the file links.