{
  "schema": "model-routing-policy-ops-kit",
  "fields": [
    {"name": "route_id", "type": "string"},
    {"name": "workflow", "type": "string"},
    {"name": "model_choice", "type": "string"},
    {"name": "fallback", "type": "string"},
    {"name": "constraints", "type": "array"},
    {"name": "release_evidence", "type": "array"},
    {"name": "owner_approval", "type": "approved | rejected | expired | pending"},
    {"name": "rollback_path", "type": "string"}
  ]
}