Tandem is a collaborative AI-human document editor designed to enhance the efficiency of document review processes. With Tandem, users can open any type of document—be it a progress report, RFP, or compliance filing—and enjoy real-time collaboration powered by AI through Claude.

Key Features:

• Real-Time Annotations: Claude generates highlights, comments, suggestions, and flags directly within the document. All annotations are displayed in a side panel, allowing users to filter by type, author, and status. Users can easily accept, dismiss, or edit annotations individually or in bulk.

• Chat Functionality: Communicate seamlessly with Claude via freeform messages alongside annotation reviews. Select text before sending messages to create clickable anchors that provide context when revisiting the document.

• Review Mode: Enter a dedicated keyboard review mode by pressing Ctrl+Shift+R. Navigate through annotations using keyboard shortcuts for a streamlined reviewing experience. The side panel keeps track of navigation position, with a convenient undo window for accidental changes.

• Multi-Document Support: Work with multiple documents simultaneously by opening .md, .txt, and .docx files in separate tabs. Users can also reorder tabs by dragging them.

• Session Persistence: Maintain document states and annotations even after server restarts, ensuring a smooth user experience.

• Real-Time Notifications: Instantaneous updates like annotation actions and chat messages are pushed to Claude, enhancing responsiveness and collaboration.

• Customizable Experience: Users can set their display name in Tandem, allowing Claude to personalize the interaction during document reviews.

Getting Started

To use Tandem, install the necessary prerequisites, and run the following command to set up the environment:

npm install -g tandem-editor
tandem setup  # Registers MCP tools and installs Claude Code skill
tandem        # Starts the server and opens the browser

Once set up, connect to Claude Code for a fully interactive experience. For instance, users can initiate a document review with a simple command:

"Review the welcome document with me"

Tandem is built with a modern tech stack, including React 19, Node.js, and TypeScript, ensuring reliability and performance. The platform is continuously updated, with extensive documentation available for users wanting to delve deeper into specific features or technical implementations.

For more detailed instructions on usage, a user guide is readily available. Explore the functionality and improve document review efficiency with Tandem.