Agentic feed digest using the feed CLI. Fetch, triage, and summarize RSS/Atom/JSON feeds to surface high-signal posts. Use when: (1) reading feeds or catching up on news, (2) user asks for a digest, roundup, or summary of recent posts, (3) user asks what's new or interesting today, (4) user mentions feed, RSS, blogs, or subscriptions.

使用 feed CLI 进行智能摘要：抓取、分类和汇总 RSS/Atom/JSON 订阅源，提炼高价值内容。适用场景：(1) 阅读订阅源或浏览最新新闻，(2) 用户要求提供近期帖子的摘要、综述或整理，(3) 用户询问今天有什么新动态或有趣内容，(4) 用户提及订阅源、RSS、博客或订阅内容。