DeepSeek Harness (DSH) 插件：在模型读取前撤回已发送的文字消息，支持单条与全部撤回。A DeepSeek Harness plugin that recalls sent-but-unread text messages before the model reads them — one-by-one or all at once.

DSH 消息撤回插件：回到发送该消息时的状态 DSH Message Recall Plugin: Return to the state when the message was sent