{
  "type": "object",
  "required": [
    "schema_version",
    "patch_id",
    "base_dataset",
    "target_case_id",
    "changes"
  ],
  "properties": {
    "schema_version": {"type": "string"},
    "patch_id": {"type": "string"},
    "base_dataset": {"type": "string"},
    "target_case_id": {"type": "string"},
    "changes": {
      "type": "object",
      "required": [
        "owner",
        "approvers",
        "evidence_artifacts_add",
        "controls_add",
        "quality_update",
        "ops_update",
        "expected_decision",
        "release_notes",
        "rollback_plan"
      ],
      "properties": {
        "owner": {"type": "string"},
        "approvers": {"type": "array", "items": {"type": "string"}},
        "evidence_artifacts_add": {"type": "array", "items": {"type": "string"}},
        "controls_add": {"type": "array", "items": {"type": "string"}},
        "quality_update": {"type": "object"},
        "ops_update": {"type": "object"},
        "expected_decision": {"enum": ["pass", "review", "block"]},
        "release_notes": {"type": "array", "items": {"type": "string"}},
        "rollback_plan": {"type": "string"}
      }
    }
  }
}