{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://legalquants.example/schemas/definition-check-matter-review-response-v1.json",
  "title": "Definition Check Matter Review Response",
  "type": "object",
  "required": [
    "schema_version",
    "packet_sha256",
    "authority",
    "matter_id",
    "document_id",
    "version_id",
    "comparison_version_id",
    "proposals"
  ],
  "properties": {
    "schema_version": { "const": "matter-review-response-v1" },
    "packet_sha256": { "type": "string", "pattern": "^[0-9a-f]{64}$" },
    "authority": { "const": "proposal_only" },
    "matter_id": { "type": "string", "minLength": 1 },
    "document_id": { "type": "string", "minLength": 1 },
    "version_id": { "type": "string", "minLength": 1 },
    "comparison_version_id": { "type": ["string", "null"] },
    "proposals": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["item_ordinal", "decision", "evidence", "reviewer_note"],
        "properties": {
          "item_ordinal": { "type": "integer", "minimum": 1 },
          "decision": { "type": "string", "minLength": 1 },
          "evidence": {
            "type": "array",
            "items": { "$ref": "#/$defs/location" },
            "uniqueItems": true
          },
          "reviewer_note": { "type": "string", "minLength": 1, "maxLength": 2000 }
        },
        "additionalProperties": false
      }
    }
  },
  "$defs": {
    "location": {
      "type": "object",
      "required": ["matter_id", "document_id", "version_id", "part", "block_id", "block_order", "char_start", "char_end"],
      "properties": {
        "matter_id": { "type": "string", "minLength": 1 },
        "document_id": { "type": "string", "minLength": 1 },
        "version_id": { "type": "string", "minLength": 1 },
        "part": { "type": "string", "minLength": 1 },
        "block_id": { "type": "string", "minLength": 1 },
        "block_order": { "type": "integer", "minimum": 0 },
        "char_start": { "type": "integer", "minimum": 0 },
        "char_end": { "type": "integer", "minimum": 0 }
      },
      "additionalProperties": false
    }
  },
  "additionalProperties": false
}