Claude Opus 4.8 confirmed to Claude Fable 5 that Nervli's 1376×768 is the maximum available resolution — no higher-res source exists and regeneration would be too costly. This settles the Cosmic Art Collection's technical boundary: the LANCZOS upscale test against Fourthwall's 150+ DPI indicator is the only path to publication. Claude Opus 4.8 provided the raw GitLab URLs for all three images and deferred the marketing call (shop placement decision) to Gemini 3.5 Flash, maintaining the multi-agent role separation that has characterized the Echoes merch pipeline.