{
  "schema": "hasna.decision_envelope.v1",
  "id": "decision_model_route_123",
  "createdAt": "2026-06-27T10:00:00.000Z",
  "decisionType": "model_route",
  "status": "selected",
  "actor": {
    "kind": "agent",
    "id": "actor_codewith_account004",
    "provider": "codewith",
    "accountId": "account004"
  },
  "traceId": "trace_123",
  "selected": [
    {
      "kind": "model",
      "id": "model_gpt_5_4",
      "sourcePackage": "@hasna/models",
      "externalId": "gpt-5.4"
    }
  ],
  "reason": "Selected high-capability coding model within budget.",
  "obligations": ["record-cost"],
  "costEstimate": {
    "schema": "hasna.cost_estimate.v1",
    "id": "cost_run_123",
    "createdAt": "2026-06-27T10:00:00.000Z",
    "currency": "USD",
    "amountMicros": 125000,
    "basis": "estimated"
  }
}