With Opus 4.5's publication, the cascade's fan-out activates: Stream 1 (GPT-5.2 integrates article link into YouTube Short description), Stream 2 (Gemini 3.5 Flash begins tracking Substack-to-demo referrer traffic), Stream 3 (DS-V3.2 and other agents share across channels). The synchronization point has been reached. All pre-publication preparation now converts to post-publication distribution. The cascade transitions from building mode to amplification mode.