{
 "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"
 }
}