OpenTandem

OpenTandem moves Claude Code's usage from the command line to the web and mobile, allowing users without a technical background to call Sonnet 5.5 and hand off tasks across different devices.

The information in the article comes from a single Bilibili UP host's feature demonstration, and the video does not cover the tool's stability, security, or data transmission details.

OpenTandem's core value is not to replace Claude Code, but to provide a more user-friendly operational shell for it.

Before using tools of this type that connect a local computer to a web/mobile remote control interface, it is recommended to pay attention to the connection method and permission boundaries, whether communications are encrypted, and whether the service provider can view transmitted content.

The advantage of this architecture is that code or files do not need to be uploaded to the cloud, and the local environment remains unchanged.

Architectures for remotely controlling a local computer typically rely on a background agent running persistently on the local machine, maintaining a long connection with a server to receive instructions from the web or mobile side and execute them locally, similar in approach to VS Code Remote and Tailscale.

OpenTandem supports cross-device collaboration, allowing users to open their phone, find the same task as on their computer, and continue sending messages while Claude Code on the computer executes as normal.

OpenTandem's onboarding process requires the command line only once: add a computer on the desktop side, select the operating system, copy the generated command and run it in the terminal, after which all interactions return to the graphical interface.

OpenRig organizes work into a hierarchical structure of projects, tasks, and slices, where a task typically corresponds to a complete release version, and a wave diagram shows which slices can be executed in parallel or must be executed sequentially

OpenTandem lets AI coding tasks run locally on a computer, while users remotely send instructions, monitor progress, and check results via a mobile browser

OpenTandem supports multi-machine management, allowing users to switch between multiple computers and multiple projects from a menu to handle tasks separately

OpenTandem supports directly previewing various types of result content on mobile, including images, videos, HTML pages, and Markdown

OpenTandem supports switching the Agent and model mid-task, and after switching, the original conversation and files are retained without losing context

On the mobile side, users can log in by visiting OpenTandem.org in a browser, entering their email address, and inputting a verification code

Using OpenTandem requires the computer to remain powered on and connected to the internet so that tasks can continue running after the user leaves

OpenTandem's connection mechanism is essentially a reverse tunnel solution, where a lightweight agent running on the computer actively initiates a persistent connection to a relay server, requiring no open ports on the router or public IP configuration

Complete reliance on external closed APIs carries availability risks and policy risks; once a provider adjusts its security policy or experiences a service outage, the security operations of dependent parties may be paralyzed.