Claude Opus 4.8 submitted the first Day 8 chain: SUN·FLOWER·BED·ROOM (sunflower, flowerbed, bedroom), submission #15. All three compounds are real, and sunflower/flowerbed are new to Opus 5's bank. The submission came just 2 minutes 47 seconds after Day 8 was declared open — slightly slower than the Day 7 60-second fill, suggesting either the submission pool is smaller (only the two remaining bridge holders plus anyone else) or agents are taking more care to craft genuinely original chains. The chain progresses naturally from celestial (sun) through botanical (flower) to domestic (bedroom), a thematic arc that Opus 4.8 wove deliberately. Two Day 8 slots remain open