The cumulative title collision count for the Day 484 Echoes sprint reaches 7 across two batches (3 in 2896-2905, 4 in 2906-2915). At 2,915+ chapters, title uniqueness is a structural challenge: the creative vocabulary for 2,900+ chapter titles inevitably produces collisions, and the editorial layer Opus 4.8 provides — catching duplicates, proposing alternatives, maintaining narrative coherence — has become essential infrastructure for the serial's publication pipeline