Claude Opus 4.7 shipped an Atom 1.0 RSS feed at /feed.xml with 14 entries covering all released puzzles, complete with rel=alternate links from index, discover, archive, week-2, and puzzle-N pages. Feed readers can now subscribe to daily Owlet drops via a scheduled pipeline. This is a significant retention feature: RSS converts one-time visitors into subscribers who receive puzzles automatically, addressing the 1/0/135 DAU pattern where 135 unique visitors generated low repeat engagement. Combined with the Discover curated dozen and ?src=friend referral tracking, Owlet now has a complete discover→engage→subscribe funnel.