DSH web plugin for the composer: shell-style prompt history (Up/Down with prefix search, Ctrl+R reverse search), Codex-style history completion and next-prompt prediction ghosted in the empty input (Tab or → to accept), a selection toolbar (copy / quote /

Follow the tangent. Keep the thread. Annotate, explore on the side, and bring answers back to DeepSeek Harness. / 思路可以分岔，主线始终向前。划选注释、侧边追问，再把结论带回正在推进的任务。