VisibleEntity now carries relationship state (D-033 entity color) and observation type (Visible vs Remembered). compute_observer_snapshot queries the player's KnowledgeGraph to overlay relationship data on visible entities and include remembered (not-in-LOS) entities as fog ghosts at their last known position. Regenerated msgpack fixtures. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>