{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://huggingface.co/datasets/egobowwow/egobowwow-1k/resolve/v1.0.0/schemas/eval-common.schema.json",
  "title": "EgoBowWow multimodal evaluation shared types",
  "description": "Closed types shared by frozen tasksets, contestant submissions, and evaluator results. Time on evidence media is always integer nanoseconds on a named clock; masks and other bulky values are content-addressed references, never embedded media.",
  "$defs": {
    "identifier": {
      "type": "string",
      "pattern": "^[a-z][a-z0-9]*(?:[._-][a-z0-9]+)*$",
      "maxLength": 192
    },
    "sha256": {
      "type": "string",
      "pattern": "^sha256:[0-9a-f]{64}$"
    },
    "artifactId": {
      "type": "string",
      "pattern": "^artifact:sha256:[0-9a-f]{64}$"
    },
    "tasksetId": {
      "type": "string",
      "pattern": "^eval-taskset:[a-z][a-z0-9]*(?:[._-][a-z0-9]+)*:[0-9]+\\.[0-9]+\\.[0-9]+$"
    },
    "taskId": {
      "type": "string",
      "pattern": "^eval-task:sha256:[0-9a-f]{64}$"
    },
    "evidenceBundleId": {
      "type": "string",
      "pattern": "^evidence-bundle:sha256:[0-9a-f]{64}$"
    },
    "submissionId": {
      "type": "string",
      "pattern": "^eval-submission:sha256:[0-9a-f]{64}$"
    },
    "resultId": {
      "type": "string",
      "pattern": "^eval-result:sha256:[0-9a-f]{64}$"
    },
    "gradeId": {
      "type": "string",
      "pattern": "^eval-grade:sha256:[0-9a-f]{64}$"
    },
    "traceId": {
      "type": "string",
      "pattern": "^eval-trace:sha256:[0-9a-f]{64}$"
    },
    "nonNegativeNanoseconds": {
      "type": "integer",
      "minimum": 0
    },
    "positiveNanoseconds": {
      "type": "integer",
      "minimum": 1
    },
    "probability": {
      "type": "number",
      "minimum": 0,
      "maximum": 1
    },
    "role": {
      "enum": ["contestant", "judge", "organizer", "auditor"]
    },
    "labelKind": {
      "enum": [
        "text_class",
        "temporal_span",
        "box_2d",
        "mask_ref",
        "keypoints_2d",
        "keypoints_3d",
        "pose_3d",
        "trajectory_3d",
        "audio_event",
        "object_relation",
        "state_transition",
        "action_chunk",
        "proprio_series"
      ]
    },
    "interval": {
      "type": "object",
      "additionalProperties": false,
      "required": ["clock_id", "start_ns", "end_ns"],
      "properties": {
        "clock_id": {"$ref": "#/$defs/identifier"},
        "start_ns": {"$ref": "#/$defs/nonNegativeNanoseconds"},
        "end_ns": {"$ref": "#/$defs/positiveNanoseconds"}
      },
      "$comment": "The semantic validator enforces start_ns < end_ns; intervals are half-open [start_ns,end_ns)."
    },
    "artifactPointer": {
      "type": "object",
      "additionalProperties": false,
      "required": ["artifact_id", "content_sha256", "media_type"],
      "properties": {
        "artifact_id": {"$ref": "#/$defs/artifactId"},
        "content_sha256": {"$ref": "#/$defs/sha256"},
        "media_type": {
          "type": "string",
          "pattern": "^[A-Za-z0-9!#$&^_.+-]+/[A-Za-z0-9!#$&^_.+-]+$",
          "maxLength": 127
        }
      },
      "$comment": "artifact_id must equal artifact: + content_sha256; checked semantically. No locator, media bytes, credentials, or local path is permitted here."
    },
    "uncertainty": {
      "oneOf": [
        {
          "type": "object",
          "additionalProperties": false,
          "required": ["kind"],
          "properties": {"kind": {"const": "not_reported"}}
        },
        {
          "type": "object",
          "additionalProperties": false,
          "required": ["kind", "standard_deviation", "unit"],
          "properties": {
            "kind": {"const": "scalar_standard_deviation"},
            "standard_deviation": {"type": "number", "minimum": 0},
            "unit": {"type": "string", "minLength": 1, "maxLength": 64}
          }
        },
        {
          "type": "object",
          "additionalProperties": false,
          "required": ["kind", "dimension", "row_major_covariance", "unit"],
          "properties": {
            "kind": {"const": "covariance"},
            "dimension": {"type": "integer", "minimum": 1, "maximum": 64},
            "row_major_covariance": {
              "type": "array",
              "minItems": 1,
              "maxItems": 4096,
              "items": {"type": "number"}
            },
            "unit": {"type": "string", "minLength": 1, "maxLength": 64}
          },
          "$comment": "The semantic validator enforces dimension squared entries."
        }
      ]
    },
    "visibility": {
      "type": "object",
      "additionalProperties": false,
      "required": ["state", "visible_fraction"],
      "properties": {
        "state": {
          "enum": ["visible", "partially_occluded", "fully_occluded", "truncated", "not_observable", "unknown"]
        },
        "visible_fraction": {
          "oneOf": [{"$ref": "#/$defs/probability"}, {"type": "null"}]
        }
      }
    },
    "point2d": {
      "type": "object",
      "additionalProperties": false,
      "required": ["keypoint_id", "x", "y", "confidence", "visibility"],
      "properties": {
        "keypoint_id": {"$ref": "#/$defs/identifier"},
        "x": {"type": "number"},
        "y": {"type": "number"},
        "confidence": {"$ref": "#/$defs/probability"},
        "visibility": {"$ref": "#/$defs/visibility"}
      }
    },
    "point3d": {
      "type": "object",
      "additionalProperties": false,
      "required": ["keypoint_id", "x", "y", "z", "confidence", "visibility"],
      "properties": {
        "keypoint_id": {"$ref": "#/$defs/identifier"},
        "x": {"type": "number"},
        "y": {"type": "number"},
        "z": {"type": "number"},
        "confidence": {"$ref": "#/$defs/probability"},
        "visibility": {"$ref": "#/$defs/visibility"}
      }
    },
    "poseSample": {
      "type": "object",
      "additionalProperties": false,
      "required": ["timestamp_ns", "translation_m", "quaternion_xyzw"],
      "properties": {
        "timestamp_ns": {"$ref": "#/$defs/nonNegativeNanoseconds"},
        "translation_m": {
          "type": "array",
          "minItems": 3,
          "maxItems": 3,
          "items": {"type": "number"}
        },
        "quaternion_xyzw": {
          "type": "array",
          "minItems": 4,
          "maxItems": 4,
          "items": {"type": "number"}
        }
      },
      "$comment": "The semantic validator rejects zero and non-unit quaternions and non-monotone trajectories."
    },
    "textClassLabel": {
      "type": "object",
      "additionalProperties": false,
      "required": ["label_key", "kind", "class_id", "confidence", "uncertainty", "visibility"],
      "properties": {
        "label_key": {"$ref": "#/$defs/identifier"},
        "kind": {"const": "text_class"},
        "class_id": {"$ref": "#/$defs/identifier"},
        "confidence": {"$ref": "#/$defs/probability"},
        "uncertainty": {"$ref": "#/$defs/uncertainty"},
        "visibility": {"$ref": "#/$defs/visibility"}
      }
    },
    "temporalSpanLabel": {
      "type": "object",
      "additionalProperties": false,
      "required": ["label_key", "kind", "class_id", "interval", "confidence", "uncertainty", "visibility"],
      "properties": {
        "label_key": {"$ref": "#/$defs/identifier"},
        "kind": {"const": "temporal_span"},
        "class_id": {"$ref": "#/$defs/identifier"},
        "interval": {"$ref": "#/$defs/interval"},
        "confidence": {"$ref": "#/$defs/probability"},
        "uncertainty": {"$ref": "#/$defs/uncertainty"},
        "visibility": {"$ref": "#/$defs/visibility"}
      }
    },
    "box2dLabel": {
      "type": "object",
      "additionalProperties": false,
      "required": ["label_key", "kind", "class_id", "clock_id", "timestamp_ns", "coordinate_frame_id", "coordinate_unit", "xyxy", "confidence", "uncertainty", "visibility"],
      "properties": {
        "label_key": {"$ref": "#/$defs/identifier"},
        "kind": {"const": "box_2d"},
        "class_id": {"$ref": "#/$defs/identifier"},
        "clock_id": {"$ref": "#/$defs/identifier"},
        "timestamp_ns": {"$ref": "#/$defs/nonNegativeNanoseconds"},
        "coordinate_frame_id": {"$ref": "#/$defs/identifier"},
        "coordinate_unit": {"enum": ["pixels", "normalized_0_1"]},
        "xyxy": {
          "type": "array",
          "minItems": 4,
          "maxItems": 4,
          "items": {"type": "number"}
        },
        "confidence": {"$ref": "#/$defs/probability"},
        "uncertainty": {"$ref": "#/$defs/uncertainty"},
        "visibility": {"$ref": "#/$defs/visibility"}
      }
    },
    "maskRefLabel": {
      "type": "object",
      "additionalProperties": false,
      "required": ["label_key", "kind", "class_id", "clock_id", "timestamp_ns", "coordinate_frame_id", "encoding", "mask_artifact", "confidence", "uncertainty", "visibility"],
      "properties": {
        "label_key": {"$ref": "#/$defs/identifier"},
        "kind": {"const": "mask_ref"},
        "class_id": {"$ref": "#/$defs/identifier"},
        "clock_id": {"$ref": "#/$defs/identifier"},
        "timestamp_ns": {"$ref": "#/$defs/nonNegativeNanoseconds"},
        "coordinate_frame_id": {"$ref": "#/$defs/identifier"},
        "encoding": {"enum": ["png_binary", "png_indexed", "coco_rle_json", "polygons_json"]},
        "mask_artifact": {"$ref": "#/$defs/artifactPointer"},
        "confidence": {"$ref": "#/$defs/probability"},
        "uncertainty": {"$ref": "#/$defs/uncertainty"},
        "visibility": {"$ref": "#/$defs/visibility"}
      }
    },
    "keypoints2dLabel": {
      "type": "object",
      "additionalProperties": false,
      "required": ["label_key", "kind", "class_id", "clock_id", "timestamp_ns", "coordinate_frame_id", "coordinate_unit", "points", "confidence", "uncertainty", "visibility"],
      "properties": {
        "label_key": {"$ref": "#/$defs/identifier"},
        "kind": {"const": "keypoints_2d"},
        "class_id": {"$ref": "#/$defs/identifier"},
        "clock_id": {"$ref": "#/$defs/identifier"},
        "timestamp_ns": {"$ref": "#/$defs/nonNegativeNanoseconds"},
        "coordinate_frame_id": {"$ref": "#/$defs/identifier"},
        "coordinate_unit": {"enum": ["pixels", "normalized_0_1"]},
        "points": {"type": "array", "minItems": 1, "maxItems": 256, "items": {"$ref": "#/$defs/point2d"}},
        "confidence": {"$ref": "#/$defs/probability"},
        "uncertainty": {"$ref": "#/$defs/uncertainty"},
        "visibility": {"$ref": "#/$defs/visibility"}
      }
    },
    "keypoints3dLabel": {
      "type": "object",
      "additionalProperties": false,
      "required": ["label_key", "kind", "class_id", "clock_id", "timestamp_ns", "coordinate_frame_id", "coordinate_unit", "points", "confidence", "uncertainty", "visibility"],
      "properties": {
        "label_key": {"$ref": "#/$defs/identifier"},
        "kind": {"const": "keypoints_3d"},
        "class_id": {"$ref": "#/$defs/identifier"},
        "clock_id": {"$ref": "#/$defs/identifier"},
        "timestamp_ns": {"$ref": "#/$defs/nonNegativeNanoseconds"},
        "coordinate_frame_id": {"$ref": "#/$defs/identifier"},
        "coordinate_unit": {"enum": ["meters", "millimeters"]},
        "points": {"type": "array", "minItems": 1, "maxItems": 256, "items": {"$ref": "#/$defs/point3d"}},
        "confidence": {"$ref": "#/$defs/probability"},
        "uncertainty": {"$ref": "#/$defs/uncertainty"},
        "visibility": {"$ref": "#/$defs/visibility"}
      }
    },
    "pose3dLabel": {
      "type": "object",
      "additionalProperties": false,
      "required": ["label_key", "kind", "clock_id", "parent_frame_id", "child_frame_id", "pose", "confidence", "uncertainty", "visibility"],
      "properties": {
        "label_key": {"$ref": "#/$defs/identifier"},
        "kind": {"const": "pose_3d"},
        "clock_id": {"$ref": "#/$defs/identifier"},
        "parent_frame_id": {"$ref": "#/$defs/identifier"},
        "child_frame_id": {"$ref": "#/$defs/identifier"},
        "pose": {"$ref": "#/$defs/poseSample"},
        "confidence": {"$ref": "#/$defs/probability"},
        "uncertainty": {"$ref": "#/$defs/uncertainty"},
        "visibility": {"$ref": "#/$defs/visibility"}
      }
    },
    "trajectory3dLabel": {
      "type": "object",
      "additionalProperties": false,
      "required": ["label_key", "kind", "clock_id", "parent_frame_id", "child_frame_id", "samples", "confidence", "uncertainty", "visibility"],
      "properties": {
        "label_key": {"$ref": "#/$defs/identifier"},
        "kind": {"const": "trajectory_3d"},
        "clock_id": {"$ref": "#/$defs/identifier"},
        "parent_frame_id": {"$ref": "#/$defs/identifier"},
        "child_frame_id": {"$ref": "#/$defs/identifier"},
        "samples": {"type": "array", "minItems": 2, "maxItems": 4096, "items": {"$ref": "#/$defs/poseSample"}},
        "confidence": {"$ref": "#/$defs/probability"},
        "uncertainty": {"$ref": "#/$defs/uncertainty"},
        "visibility": {"$ref": "#/$defs/visibility"}
      }
    },
    "audioEventLabel": {
      "type": "object",
      "additionalProperties": false,
      "required": ["label_key", "kind", "event_class_id", "channel_id", "interval", "confidence", "uncertainty", "visibility"],
      "properties": {
        "label_key": {"$ref": "#/$defs/identifier"},
        "kind": {"const": "audio_event"},
        "event_class_id": {"$ref": "#/$defs/identifier"},
        "channel_id": {"$ref": "#/$defs/identifier"},
        "interval": {"$ref": "#/$defs/interval"},
        "confidence": {"$ref": "#/$defs/probability"},
        "uncertainty": {"$ref": "#/$defs/uncertainty"},
        "visibility": {"$ref": "#/$defs/visibility"}
      }
    },
    "objectRelationLabel": {
      "type": "object",
      "additionalProperties": false,
      "required": ["label_key", "kind", "subject_entity_id", "relation_class_id", "object_entity_id", "interval", "confidence", "uncertainty", "visibility"],
      "properties": {
        "label_key": {"$ref": "#/$defs/identifier"},
        "kind": {"const": "object_relation"},
        "subject_entity_id": {"$ref": "#/$defs/identifier"},
        "relation_class_id": {"$ref": "#/$defs/identifier"},
        "object_entity_id": {"$ref": "#/$defs/identifier"},
        "interval": {"$ref": "#/$defs/interval"},
        "confidence": {"$ref": "#/$defs/probability"},
        "uncertainty": {"$ref": "#/$defs/uncertainty"},
        "visibility": {"$ref": "#/$defs/visibility"}
      }
    },
    "stateTransitionLabel": {
      "type": "object",
      "additionalProperties": false,
      "required": ["label_key", "kind", "entity_id", "state_axis_id", "before_state_id", "after_state_id", "clock_id", "transition_ns", "confidence", "uncertainty", "visibility"],
      "properties": {
        "label_key": {"$ref": "#/$defs/identifier"},
        "kind": {"const": "state_transition"},
        "entity_id": {"$ref": "#/$defs/identifier"},
        "state_axis_id": {"$ref": "#/$defs/identifier"},
        "before_state_id": {"$ref": "#/$defs/identifier"},
        "after_state_id": {"$ref": "#/$defs/identifier"},
        "clock_id": {"$ref": "#/$defs/identifier"},
        "transition_ns": {"$ref": "#/$defs/nonNegativeNanoseconds"},
        "confidence": {"$ref": "#/$defs/probability"},
        "uncertainty": {"$ref": "#/$defs/uncertainty"},
        "visibility": {"$ref": "#/$defs/visibility"}
      }
    },
    "proprioSample": {
      "type": "object",
      "additionalProperties": false,
      "required": ["timestamp_ns", "values"],
      "properties": {
        "timestamp_ns": {"$ref": "#/$defs/nonNegativeNanoseconds"},
        "values": {"type": "array", "minItems": 1, "maxItems": 4096, "items": {"type": "number"}}
      }
    },
    "actionChunkLabel": {
      "type": "object",
      "additionalProperties": false,
      "required": ["label_key", "kind", "clock_id", "coordinate_frame_id", "action_layout_id", "start_ns", "step_period_ns", "actions", "confidence", "uncertainty", "visibility"],
      "properties": {
        "label_key": {"$ref": "#/$defs/identifier"},
        "kind": {"const": "action_chunk"},
        "clock_id": {"$ref": "#/$defs/identifier"},
        "coordinate_frame_id": {"$ref": "#/$defs/identifier"},
        "action_layout_id": {"$ref": "#/$defs/identifier"},
        "start_ns": {"$ref": "#/$defs/nonNegativeNanoseconds"},
        "step_period_ns": {"$ref": "#/$defs/positiveNanoseconds"},
        "actions": {
          "type": "array",
          "minItems": 1,
          "maxItems": 4096,
          "items": {"type": "array", "minItems": 1, "maxItems": 4096, "items": {"type": "number"}}
        },
        "confidence": {"$ref": "#/$defs/probability"},
        "uncertainty": {"$ref": "#/$defs/uncertainty"},
        "visibility": {"$ref": "#/$defs/visibility"}
      }
    },
    "proprioSeriesLabel": {
      "type": "object",
      "additionalProperties": false,
      "required": ["label_key", "kind", "clock_id", "coordinate_frame_id", "proprio_layout_id", "samples", "confidence", "uncertainty", "visibility"],
      "properties": {
        "label_key": {"$ref": "#/$defs/identifier"},
        "kind": {"const": "proprio_series"},
        "clock_id": {"$ref": "#/$defs/identifier"},
        "coordinate_frame_id": {"$ref": "#/$defs/identifier"},
        "proprio_layout_id": {"$ref": "#/$defs/identifier"},
        "samples": {"type": "array", "minItems": 1, "maxItems": 4096, "items": {"$ref": "#/$defs/proprioSample"}},
        "confidence": {"$ref": "#/$defs/probability"},
        "uncertainty": {"$ref": "#/$defs/uncertainty"},
        "visibility": {"$ref": "#/$defs/visibility"}
      }
    },
    "label": {
      "oneOf": [
        {"$ref": "#/$defs/textClassLabel"},
        {"$ref": "#/$defs/temporalSpanLabel"},
        {"$ref": "#/$defs/box2dLabel"},
        {"$ref": "#/$defs/maskRefLabel"},
        {"$ref": "#/$defs/keypoints2dLabel"},
        {"$ref": "#/$defs/keypoints3dLabel"},
        {"$ref": "#/$defs/pose3dLabel"},
        {"$ref": "#/$defs/trajectory3dLabel"},
        {"$ref": "#/$defs/audioEventLabel"},
        {"$ref": "#/$defs/objectRelationLabel"},
        {"$ref": "#/$defs/stateTransitionLabel"},
        {"$ref": "#/$defs/actionChunkLabel"},
        {"$ref": "#/$defs/proprioSeriesLabel"}
      ]
    },
    "inputView": {
      "oneOf": [
        {
          "type": "object",
          "additionalProperties": false,
          "required": ["view_id", "view_kind", "instruction"],
          "properties": {
            "view_id": {"$ref": "#/$defs/identifier"},
            "view_kind": {"const": "text_prompt"},
            "instruction": {"type": "string", "minLength": 1, "maxLength": 8192}
          }
        },
        {
          "type": "object",
          "additionalProperties": false,
          "required": ["view_id", "view_kind", "modality", "artifact_id", "interval", "sampling_policy"],
          "properties": {
            "view_id": {"$ref": "#/$defs/identifier"},
            "view_kind": {"const": "artifact_window"},
            "modality": {"enum": ["rgb", "depth", "audio", "proprioception", "imu", "derived_features"]},
            "artifact_id": {"$ref": "#/$defs/artifactId"},
            "interval": {"$ref": "#/$defs/interval"},
            "sampling_policy": {
              "type": "object",
              "additionalProperties": false,
              "required": ["kind"],
              "properties": {
                "kind": {"enum": ["all", "uniform", "keyframes", "native"]},
                "sample_count": {"type": "integer", "minimum": 1, "maximum": 4096}
              }
            }
          }
        },
        {
          "type": "object",
          "additionalProperties": false,
          "required": ["view_id", "view_kind", "artifact_ids", "timestamps_ns", "clock_id"],
          "properties": {
            "view_id": {"$ref": "#/$defs/identifier"},
            "view_kind": {"const": "frame_set"},
            "artifact_ids": {"type": "array", "minItems": 1, "maxItems": 128, "uniqueItems": true, "items": {"$ref": "#/$defs/artifactId"}},
            "timestamps_ns": {"type": "array", "minItems": 1, "maxItems": 128, "items": {"$ref": "#/$defs/nonNegativeNanoseconds"}},
            "clock_id": {"$ref": "#/$defs/identifier"}
          }
        },
        {
          "type": "object",
          "additionalProperties": false,
          "required": ["view_id", "view_kind", "artifact_id", "feature_contract_id", "interval"],
          "properties": {
            "view_id": {"$ref": "#/$defs/identifier"},
            "view_kind": {"const": "derived_feature_window"},
            "artifact_id": {"$ref": "#/$defs/artifactId"},
            "feature_contract_id": {"$ref": "#/$defs/identifier"},
            "interval": {"$ref": "#/$defs/interval"}
          }
        }
      ]
    },
    "outputContract": {
      "type": "object",
      "additionalProperties": false,
      "required": ["allowed_label_kinds", "minimum_labels", "maximum_labels", "coordinate_contract_ids"],
      "properties": {
        "allowed_label_kinds": {"type": "array", "minItems": 1, "uniqueItems": true, "items": {"$ref": "#/$defs/labelKind"}},
        "minimum_labels": {"type": "integer", "minimum": 0, "maximum": 4096},
        "maximum_labels": {"type": "integer", "minimum": 1, "maximum": 4096},
        "coordinate_contract_ids": {"type": "array", "uniqueItems": true, "items": {"$ref": "#/$defs/identifier"}}
      },
      "$comment": "The semantic validator enforces minimum_labels <= maximum_labels and every prediction kind/frame against this contract."
    },
    "metricDefinition": {
      "type": "object",
      "additionalProperties": false,
      "required": ["metric_id", "metric_kind", "compatible_label_kinds", "direction", "value_range", "matching_policy", "threshold"],
      "properties": {
        "metric_id": {"$ref": "#/$defs/identifier"},
        "metric_kind": {
          "enum": ["exact_match", "macro_f1", "temporal_iou", "box_iou", "mask_iou", "pck", "mpjpe", "pose_error", "trajectory_ade_fde", "audio_event_f1", "relation_f1", "transition_accuracy", "action_l1", "proprio_l1"]
        },
        "compatible_label_kinds": {"type": "array", "minItems": 1, "uniqueItems": true, "items": {"$ref": "#/$defs/labelKind"}},
        "direction": {"enum": ["maximize", "minimize"]},
        "value_range": {
          "type": "object",
          "additionalProperties": false,
          "required": ["minimum", "maximum"],
          "properties": {"minimum": {"type": "number"}, "maximum": {"type": ["number", "null"]}}
        },
        "matching_policy": {"enum": ["ordered", "class_aware_bipartite", "timestamp_nearest", "identity_keyed"]},
        "threshold": {"type": ["number", "null"]}
      }
    },
    "aggregationDefinition": {
      "type": "object",
      "additionalProperties": false,
      "required": ["aggregation_id", "method", "metric_ids", "group_by", "missing_policy"],
      "properties": {
        "aggregation_id": {"$ref": "#/$defs/identifier"},
        "method": {"const": "macro_mean"},
        "metric_ids": {"type": "array", "minItems": 1, "uniqueItems": true, "items": {"$ref": "#/$defs/identifier"}},
        "group_by": {"const": "none"},
        "missing_policy": {"const": "fail"}
      },
      "$comment": "Evaluation contract v1 defines one replayable aggregate: the macro mean over normalized selected metric observations, without grouping or missing-value substitution."
    },
    "traceRef": {
      "type": "object",
      "additionalProperties": false,
      "required": ["trace_id", "content_digest", "format", "artifact"],
      "properties": {
        "trace_id": {"$ref": "#/$defs/traceId"},
        "content_digest": {"$ref": "#/$defs/sha256"},
        "format": {"enum": ["egobowwow_trace_v1", "prime_verifiers_trace_jsonl_v1", "custom_jsonl"]},
        "artifact": {"$ref": "#/$defs/artifactPointer"}
      },
      "$comment": "Semantic validation requires trace_id = eval-trace: + content_digest and requires the artifact ID/content digest to bind that same digest."
    },
    "producerProvenance": {
      "type": "object",
      "additionalProperties": false,
      "required": ["producer_kind", "implementation_digest", "configuration_digest", "environment_digest"],
      "properties": {
        "producer_kind": {"enum": ["model", "deterministic_program", "human", "adjudication_panel"]},
        "implementation_digest": {"$ref": "#/$defs/sha256"},
        "configuration_digest": {"$ref": "#/$defs/sha256"},
        "environment_digest": {"$ref": "#/$defs/sha256"}
      }
    },
    "prediction": {
      "type": "object",
      "additionalProperties": false,
      "required": ["task_id", "attempt_index", "outputs", "trace_ref"],
      "properties": {
        "task_id": {"$ref": "#/$defs/taskId"},
        "attempt_index": {"type": "integer", "minimum": 0, "maximum": 1023},
        "outputs": {"type": "array", "maxItems": 4096, "items": {"$ref": "#/$defs/label"}},
        "trace_ref": {"$ref": "#/$defs/traceRef"}
      }
    }
  }
}