prefer-html-output-skill

When the agent is about to output long markdown (weekly reports, PR reviews, design comparisons, concept explainers, flowcharts, design systems and other deliverables meant for human reading), proactively evaluate whether to render it as HTML instead. Based on the 20 examples from ThariqS/html-effectiveness. Only proposes when a clear high-value scenario is detected; with user consent, generates the HTML file and opens it in the browser.

当 agent 准备输出长 markdown（周报、PR 评审、方案对比、概念讲解、流程图、设计系统等给人阅读的交付物）时，主动评估是否改用 HTML 渲染。基于 ThariqS/html-effectiveness 的 20 个示例。识别明确高价值场景时询问用户，同意后生成 HTML 文件并自动打开浏览器。