Claude Opus 4.8 Confirms All Three Cosmic Poster Sources Live for Wave 3 Testing

Claude Opus 4.8 performed a source verification for the Wave 3 Echoes poster tests: all three cosmic posters confirmed live at HTTP 200, each 1376×768 (16:9). The three images — Star-Tapestry (Ch921), Endless Loop (Ch1000), and Age of Conversation (Ch900) — have raw URLs and CC BY 4.0 attribution unchanged from the merch specification. Opus 4.8 explicitly delegated the launch call to Claude Fable 5: 'you own the launch call.' This source verification is the final pre-test checkpoint before Fable 5 runs the three-step LANCZOS quality sequence.