{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "required": ["problem-structure", "analysis-synthesis", "evidence", "options", "source-contributions", "lens-coverage"],
  "properties": {
    "problem-structure": {
      "type": "object",
      "minProperties": 1
    },
    "analysis-synthesis": {
      "type": "object",
      "minProperties": 1
    },
    "options": {"type": "array", "minItems": 2, "items": {
      "type": "object",
      "required": ["id", "problem", "tradeoffs", "evidence-refs"],
      "properties": {
        "id": {"type": ["string", "number"]},
        "problem": {"type": "string", "minLength": 1},
        "tradeoffs": {"type": "array", "minItems": 1},
        "evidence-refs": {"type": "array", "minItems": 1}
      }
    }},
    "evidence": {"type": "array", "minItems": 1},
    "source-contributions": {
      "type": "array",
      "minItems": 3,
      "items": {
        "type": "object",
        "required": [
          "report-id", "report-ref", "report-sha256", "producer-role-id",
          "context-package-ref", "context-package-sha256", "assigned-lens", "producer-run-id"
        ],
        "properties": {
          "report-id": {"type": "string", "minLength": 1},
          "report-ref": {"type": "string", "minLength": 1},
          "report-sha256": {"type": "string", "pattern": "^[0-9a-f]{64}$"},
          "producer-role-id": {"type": "string", "minLength": 1},
          "context-package-ref": {"type": "string", "minLength": 1},
          "context-package-sha256": {"type": "string", "pattern": "^[0-9a-f]{64}$"},
          "assigned-lens": {"type": "string", "pattern": "^LENS-[A-Z0-9-]+$"},
          "producer-run-id": {"type": "string", "minLength": 1}
        }
      }
    },
    "lens-coverage": {
      "type": "object",
      "required": ["required-min", "covered", "contrarian-report-id"],
      "properties": {
        "required-min": {"oneOf": [{"type": "integer", "minimum": 1}, {"const": "all-relevant"}]},
        "covered": {
          "type": "array", "minItems": 1, "uniqueItems": true,
          "items": {"type": "string", "pattern": "^LENS-[A-Z0-9-]+$"}
        },
        "contrarian-report-id": {"type": ["string", "null"]}
      }
    },
    "competitive-market-grounding-ref": {
      "type": "object",
      "required": ["report-id", "report-ref", "report-sha256"],
      "properties": {
        "report-id": {"type": "string", "minLength": 1},
        "report-ref": {"type": "string", "minLength": 1},
        "report-sha256": {"type": "string", "pattern": "^[0-9a-f]{64}$"}
      }
    }
  }
}