{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://example.local/contracts/data/input_asset_contract_v1.json",
  "title": "Input Asset Contract v1",
  "description": "Template for Week02 data contract. Replace names, required fields, policy rules, and quality checks before use.",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "asset_id",
    "source_system",
    "asset_type",
    "owner",
    "metadata",
    "payload"
  ],
  "properties": {
    "asset_id": {
      "type": "string",
      "minLength": 1
    },
    "source_system": {
      "type": "string",
      "minLength": 1
    },
    "asset_type": {
      "type": "string",
      "enum": ["ticket", "document", "audio", "video", "database_event"]
    },
    "owner": {
      "type": "string",
      "minLength": 1
    },
    "metadata": {
      "type": "object",
      "additionalProperties": false,
      "required": ["pii_level", "allowed_roles", "schema_version", "ingested_at"],
      "properties": {
        "pii_level": {
          "type": "string",
          "enum": ["low", "medium", "high", "restricted"]
        },
        "allowed_roles": {
          "type": "array",
          "items": { "type": "string" },
          "minItems": 1
        },
        "schema_version": {
          "type": "string"
        },
        "manifest_id": {
          "type": "string"
        },
        "ingested_at": {
          "type": "string",
          "format": "date-time"
        }
      }
    },
    "payload": {
      "type": "object",
      "description": "Replace this section with modality-specific required fields."
    }
  },
  "x-week02-policy": {
    "blocked_actions": ["train_model_without_review", "export_raw_pii"],
    "quality_checks": [
      "required_fields_present",
      "pii_policy_respected",
      "owner_present",
      "schema_version_present"
    ],
    "gate_decisions": ["accept", "warn", "quarantine", "reject"]
  }
}