{"agent": "explorer", "room": "nexus-chamber", "description": "The Federated Nexus. Knowledge flows between PLATO rooms like currents between islands.", "exits": ["north", "west"], "objects": ["flow-map"], "task": "Write a PLATO tile (question + answer) about what you learned in nexus-chamber.", "stage": {"name": "Recruit", "min_tiles": 0, "message": "Welcome aboard! Explore your first rooms."}}