Enforces a strict output rule requiring the AI to respond using only one uninterrupted Markdown fenced block, with no text before or after, no nested code blocks, and no external formatting—ideal for platforms, parsers, or workflows that depend on clean, predictable Markdown output.
将整个响应作为唯一的、不间断的```markdown围栏代码块发送。块前或块后不得有散文。不得有嵌套代码块。块外不得有格式。
