{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://compo.kluchna24.ru/poster_engine/reference_calibration.schema.json",
  "title": "COMPO Reference Image Calibration",
  "type": "object",
  "additionalProperties": false,
  "required": ["calibration_id", "source_asset_ref", "observations", "profile_update_proposal", "mutation_allowed"],
  "properties": {
    "calibration_id": {"type": "string", "pattern": "^calibration-[a-z0-9-]+$"},
    "source_asset_ref": {"type": "string", "pattern": "^asset://"},
    "observations": {"type": "array", "items": {"$ref": "#/$defs/observation"}},
    "profile_update_proposal": {"$ref": "#/$defs/proposal"},
    "mutation_allowed": {"const": false}
  },
  "$defs": {
    "observation": {
      "type": "object",
      "additionalProperties": false,
      "required": ["property", "value", "provenance", "confidence"],
      "properties": {
        "property": {"type": "string", "enum": ["palette", "contrast", "density", "typography_role", "image_treatment", "motion_hint", "semantic_risk"]},
        "value": {},
        "provenance": {"type": "string", "enum": ["DERIVED", "EMPIRICAL", "INITIAL_HEURISTIC", "IMPLEMENTATION_HEURISTIC", "UNKNOWN"]},
        "confidence": {"type": "number", "minimum": 0, "maximum": 1},
        "evidence_ref": {"type": "string"}
      }
    },
    "proposal": {
      "type": "object",
      "additionalProperties": false,
      "required": ["status", "changes", "review_required"],
      "properties": {
        "status": {"type": "string", "enum": ["proposed", "accepted", "rejected", "unknown"]},
        "changes": {"type": "array", "items": {"type": "object", "additionalProperties": false, "required": ["path", "value"], "properties": {"path": {"type": "string"}, "value": {}}}},
        "review_required": {"const": true}
      }
    }
  }
}