{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://stella-ops.org/schemas/claim-score/1.0.0",
  "title": "Claim Score Schema",
  "description": "Schema for VEX claim scoring in the trust lattice",
  "type": "object",
  "required": [
    "source_id",
    "status",
    "base_trust",
    "strength_multiplier",
    "freshness_multiplier",
    "claim_score"
  ],
  "properties": {
    "source_id": {
      "type": "string",
      "description": "Identifier of the VEX source"
    },
    "status": {
      "type": "string",
      "enum": ["affected", "not_affected", "fixed", "under_investigation"],
      "description": "VEX status asserted by this claim"
    },
    "trust_vector": {
      "$ref": "trust-vector.schema.json",
      "description": "Trust vector for the source"
    },
    "base_trust": {
      "type": "number",
      "minimum": 0,
      "maximum": 1,
      "description": "BaseTrust(S) = wP*P + wC*C + wR*R"
    },
    "strength": {
      "type": "string",
      "enum": [
        "exploitability_with_reachability",
        "config_with_evidence",
        "vendor_blanket",
        "under_investigation"
      ],
      "description": "Claim strength category"
    },
    "strength_multiplier": {
      "type": "number",
      "minimum": 0,
      "maximum": 1,
      "description": "Strength multiplier (M) based on evidence quality"
    },
    "issued_at": {
      "type": "string",
      "format": "date-time",
      "description": "When the claim was issued"
    },
    "freshness_multiplier": {
      "type": "number",
      "minimum": 0,
      "maximum": 1,
      "description": "Freshness decay multiplier (F)"
    },
    "claim_score": {
      "type": "number",
      "minimum": 0,
      "maximum": 1,
      "description": "Final score: BaseTrust * M * F"
    },
    "adjusted_score": {
      "type": "number",
      "minimum": 0,
      "maximum": 1,
      "description": "Score after conflict penalty (if applicable)"
    },
    "conflict_penalty_applied": {
      "type": "boolean",
      "default": false,
      "description": "Whether a conflict penalty was applied"
    },
    "scope_specificity": {
      "type": "integer",
      "minimum": 1,
      "maximum": 5,
      "description": "Scope specificity level (1=exact digest, 5=platform)"
    },
    "reason": {
      "type": "string",
      "description": "Human-readable reason for the claim"
    },
    "evidence_refs": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "References to supporting evidence"
    }
  },
  "additionalProperties": false,
  "$defs": {
    "ScoredClaimSet": {
      "type": "object",
      "description": "A set of scored claims for a single (asset, vulnerability) pair",
      "required": [
        "asset_digest",
        "vulnerability_id",
        "claims"
      ],
      "properties": {
        "asset_digest": {
          "type": "string",
          "pattern": "^sha256:[a-f0-9]{64}$",
          "description": "SHA256 digest of the asset"
        },
        "vulnerability_id": {
          "type": "string",
          "description": "Vulnerability identifier"
        },
        "claims": {
          "type": "array",
          "items": {
            "$ref": "#"
          },
          "description": "Scored claims for this asset/vulnerability"
        },
        "has_conflict": {
          "type": "boolean",
          "description": "Whether conflicting claims exist"
        },
        "winner": {
          "$ref": "#",
          "description": "The winning claim"
        },
        "evaluated_at": {
          "type": "string",
          "format": "date-time",
          "description": "When the scoring was performed"
        }
      },
      "additionalProperties": false
    },
    "MergeResult": {
      "type": "object",
      "description": "Result of merging multiple claims into a verdict",
      "required": [
        "status",
        "confidence",
        "policy_hash",
        "lattice_version"
      ],
      "properties": {
        "status": {
          "type": "string",
          "enum": ["affected", "not_affected", "fixed", "under_investigation"],
          "description": "Merged verdict status"
        },
        "confidence": {
          "type": "number",
          "minimum": 0,
          "maximum": 1,
          "description": "Confidence in the verdict"
        },
        "explanations": {
          "type": "array",
          "items": {
            "$ref": "#"
          },
          "description": "All claims considered"
        },
        "evidence_refs": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "description": "Aggregated evidence references"
        },
        "policy_hash": {
          "type": "string",
          "pattern": "^sha256:[a-f0-9]{64}$",
          "description": "Hash of the policy file"
        },
        "lattice_version": {
          "type": "string",
          "pattern": "^[0-9]+\\.[0-9]+\\.[0-9]+$",
          "description": "Trust lattice version"
        },
        "gates_passed": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "description": "Policy gates that passed"
        },
        "gates_failed": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "description": "Policy gates that failed"
        }
      },
      "additionalProperties": false
    },
    "ConflictResolution": {
      "type": "object",
      "description": "Details of how a conflict was resolved",
      "properties": {
        "conflict_detected": {
          "type": "boolean",
          "description": "Whether a conflict was detected"
        },
        "conflicting_statuses": {
          "type": "array",
          "items": {
            "type": "string",
            "enum": ["affected", "not_affected", "fixed", "under_investigation"]
          },
          "description": "Distinct statuses in conflict"
        },
        "penalty_applied": {
          "type": "number",
          "default": 0.25,
          "description": "Penalty applied to weaker claims"
        },
        "resolution_reason": {
          "type": "string",
          "description": "Explanation of resolution method"
        }
      },
      "additionalProperties": false
    }
  }
}