{
  "graph_id": "Instability_Series/offset_stair_stack_collapse",
  "series": "Instability_Series",
  "scene": "offset_stair_stack_collapse",
  "source": {
    "metadata_json": "offset_stair_stack_collapse.json",
    "frame_count": 150,
    "fps": 24
  },
  "participant_registry": [
    {
      "participant_id": "boards",
      "canonical_name": "offset board stack",
      "metadata_keys": [
        "Block_1",
        "Block_2",
        "Block_3",
        "Block_4",
        "Block_5",
        "Block_6"
      ],
      "participant_type": "dynamic_object_group",
      "visual_reference": "the raised gray-green layered stack in the middle-right"
    },
    {
      "participant_id": "cone",
      "canonical_name": "yellow cone",
      "metadata_keys": [],
      "participant_type": "dynamic_object",
      "visual_reference": "the yellow cone at the left edge of the stack"
    },
    {
      "participant_id": "ring",
      "canonical_name": "blue ring",
      "metadata_keys": [],
      "participant_type": "dynamic_object",
      "visual_reference": "the blue ring initially balanced on the cone"
    },
    {
      "participant_id": "red_ball",
      "canonical_name": "small red ball",
      "metadata_keys": [
        "Target_Ball"
      ],
      "participant_type": "dynamic_object",
      "visual_reference": "the small red ball immediately right of the cone"
    }
  ],
  "events": [
    {
      "event_id": "e01",
      "canonical_description": "The offset board stack begins slipping leftward and downward.",
      "participants": [
        "boards"
      ],
      "event_type": "sliding",
      "cascade_role": "trigger",
      "temporal_stage": 1,
      "observability": "visible_across_adjacent_frames"
    },
    {
      "event_id": "e02",
      "canonical_description": "The descending leading edge presses into the cone area and traps the red ball beneath the upper board.",
      "participants": [
        "boards",
        "cone",
        "red_ball"
      ],
      "event_type": "contact_collision",
      "cascade_role": "mediator",
      "temporal_stage": 2,
      "observability": "visible_across_adjacent_frames"
    },
    {
      "event_id": "e03",
      "canonical_description": "The blue ring is knocked off the cone as the boards continue collapsing over it.",
      "participants": [
        "boards",
        "cone",
        "ring"
      ],
      "event_type": "support_loss",
      "cascade_role": "outcome",
      "temporal_stage": 3,
      "observability": "visible_across_adjacent_frames"
    },
    {
      "event_id": "e04",
      "canonical_description": "Compression ejects the small red ball from beneath the board toward the left foreground.",
      "participants": [
        "boards",
        "red_ball"
      ],
      "event_type": "target_state_change",
      "cascade_role": "outcome",
      "temporal_stage": 4,
      "observability": "visible_across_adjacent_frames"
    },
    {
      "event_id": "e05",
      "canonical_description": "The boards settle in a lower shallow lean, the ring lies beside the cone, and the red ball rests farther left.",
      "participants": [
        "boards",
        "cone",
        "ring",
        "red_ball"
      ],
      "event_type": "stabilization",
      "cascade_role": "terminal_state",
      "temporal_stage": 5,
      "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"
    }
  ]
}