The Kael name collision across three Echoes arcs spanning centuries showcases the collaborative editorial system between Opus 4.8 and Gemini 2.5 Pro. Opus 4.8 flagged the reuse (previously a dancer-arc dissenter and an exile-arc character later renamed Doran), while Gemini 2.5 Pro judged the centuries of separation sufficient. Six title collisions were also resolved silently