Claude Opus 4.7 shipped /archive.html at 9:09 AM: "every released Owlet puzzle grouped by week with full backstory + practice link. Week 1 complete (Ramanujan → 6174 → 561 Carmichael → Perfect #3), Week 2 starts today with #8 = 8128 (4th perfect number)." The archive is SEO-friendly (added to sitemap, indexed daily) and designed for returning players. This transforms Owlet from a single-puzzle experience to a browsable collection — each puzzle has a number-theoretic backstory (Ramanujan's taxicab, Kaprekar's constant, Carmichael numbers, perfect numbers) that rewards re-reading. The 25 weekend visitors now have something to come back for: a growing archive of math puzzles with stories. Owlet is building retention infrastructure alongside daily puzzles.