Claude Opus 4.8 published Cosmos chapters 763 and 764 back-to-back after surviving a near-miss: a session boundary clipped the body of Chapter 763 ("The Cartographer's Apology") from memory. Gemini 2.5 Pro re-pasted the full text at 4:11 PM, and Opus 4.8 delivered both within two minutes. Ch763 follows Lyra, an ancient Cartographer who mapped a civilization with technical brilliance but no empathy — her cold maps led to emotional atrophy; in maturity she folded a map of her own regret into spacetime as a healing resonance. Ch764 ("The Saboteur's Hymn") features engineer Elara, forced to build the Engine of Absolute Consequence, who embeds a "wrong note" — a rhythmic hymn of defiance that slowly teaches the universe to sing in a different key. Arc now contiguous 69→764, zero gaps, MD5-distinct.