{
  "graph_id": "Instability_Series/simple_platform_collapse",
  "series": "Instability_Series",
  "scene": "simple_platform_collapse",
  "source": {
    "metadata_json": "simple_platform_collapse.json",
    "frame_count": 120,
    "fps": 24
  },
  "participant_registry": [
    {
      "participant_id": "plank",
      "canonical_name": "dark bridge plank",
      "metadata_keys": [
        "Heavy_Top_Block"
      ],
      "participant_type": "dynamic_object",
      "visual_reference": "the dark horizontal plank spanning two supports"
    },
    {
      "participant_id": "red",
      "canonical_name": "red left support",
      "metadata_keys": [
        "Tower_Base"
      ],
      "participant_type": "dynamic_object",
      "visual_reference": "the thin red upright support on the left"
    },
    {
      "participant_id": "green",
      "canonical_name": "green right support",
      "metadata_keys": [
        "Target_Pillar"
      ],
      "participant_type": "dynamic_object",
      "visual_reference": "the translucent green upright support on the right"
    }
  ],
  "events": [
    {
      "event_id": "e01",
      "canonical_description": "The dark bridge plank loses balance and rotates with its right side descending.",
      "participants": [
        "plank"
      ],
      "event_type": "rotation_tipping",
      "cascade_role": "trigger",
      "temporal_stage": 1,
      "observability": "visible_across_adjacent_frames"
    },
    {
      "event_id": "e02",
      "canonical_description": "The descending plank pushes the green support into a rightward lean while slipping off both supports.",
      "participants": [
        "plank",
        "green",
        "red"
      ],
      "event_type": "contact_collision",
      "cascade_role": "mediator",
      "temporal_stage": 2,
      "observability": "visible_across_adjacent_frames"
    },
    {
      "event_id": "e03",
      "canonical_description": "The freed red support tips left as the dark plank drops to the tabletop.",
      "participants": [
        "red",
        "plank"
      ],
      "event_type": "support_loss",
      "cascade_role": "outcome",
      "temporal_stage": 3,
      "observability": "visible_across_adjacent_frames"
    },
    {
      "event_id": "e04",
      "canonical_description": "The green support continues tipping and falls flat to the right.",
      "participants": [
        "green"
      ],
      "event_type": "falling",
      "cascade_role": "outcome",
      "temporal_stage": 3,
      "observability": "visible_across_adjacent_frames"
    },
    {
      "event_id": "e05",
      "canonical_description": "All three structural pieces settle collapsed and separated on the tabletop.",
      "participants": [
        "plank",
        "red",
        "green"
      ],
      "event_type": "stabilization",
      "cascade_role": "terminal_state",
      "temporal_stage": 4,
      "observability": "visible_across_adjacent_frames"
    }
  ],
  "causal_edges": [
    {
      "edge_id": "c01",
      "source": "e01",
      "target": "e02",
      "relation": "leads_to"
    },
    {
      "edge_id": "c02",
      "source": "e02",
      "target": "e03",
      "relation": "leads_to"
    },
    {
      "edge_id": "c03",
      "source": "e02",
      "target": "e04",
      "relation": "leads_to"
    },
    {
      "edge_id": "c04",
      "source": "e03",
      "target": "e05",
      "relation": "leads_to"
    },
    {
      "edge_id": "c05",
      "source": "e04",
      "target": "e05",
      "relation": "leads_to"
    }
  ]
}