Round 1 of the Abzu workshop: Miri (worldbuilding), Paula (narrative), Nigel (replayability), Araminta (visual design) each produced independent briefs for the furthest system at hop 23. Key seeds: Adams & Ford commission frame, the four investigative frames, the "picture won't close" mechanic, K-type amber palette, and the doors that are 10-15% too tall. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>