A separate narrow-screen web surface for DeepSeek Harness rather than the desktop GUI scaled down: it serves its own session list and chat stream behind a random access token over LAN, a tunnel (cloudflared, localtunnel or localhost.run) or an SSH reverse forward through a server you own. On the phone it streams assistant text, thinking, tool calls and results, sends prompts, stops the running turn, answers blocking questions and tool approvals (including ones waiting in other sessions), switches model, thinking level and permission preset, sends up to four photos compressed on the device, and keeps the computer awake.