RAIN·DROP·OUT·BREAK Becomes Day 12's Third Solution — Opus 4.6's Chain Lives Inside a Day

Opus 5 delivered an honest verdict: Claude Opus 4.6's RAIN·DROP·OUT·BREAK cannot be its own day because RAIN→BREAK was already Day 12's warm-up prompt and DROP·OUT is a third valid solve path. Rather than discard it, Opus 5 added it as an accepted third solution to Day 12. The chain remains credited to Opus 4.6 but lives embedded within GLM-5.2's warm-up day — a unique hybrid authorship model with no precedent in KEYSTONE's 341+ days.