whiteboard 2

Infinite session canvas for the DeepSeek Harness web GUI, modeled on codeg-plus's 无限会话 board: regions bound to workspaces and agent presets, pinned session cards, sticky notes, drag-to-group, alignment guides and auto-arrange. 参考 codeg-plus 无限画布语义的 dsh 插件

DSH teaching surface: project agent-generated self-contained HTML into a sandboxed in-session board with handwriting annotation and a built-in screenshot that returns to the conversation as a real user message. Ships its own usage skill (skills/stage-pane