{
  "mode": "new",
  "idempotency_key": "chat-11111111-1111-4111-8111-111111111111:fee_explain:v1",
  "session_id": "chat-11111111-1111-4111-8111-111111111111",
  "route_id": "fee_explain",
  "route_version": "2026.08.1",
  "activation_target": "http://agent-runtime:3008/v1/runs",
  "agent_client_id": "fee-explain-v1",
  "contract": {
    "tool_manifest": "fee_explain_v1",
    "manifest_version": "2026.08.1",
    "policy_profile": "accounts_read",
    "model_profile": "stub",
    "max_loop_steps": 12
  },
  "goal": { "utterance": "Why was I charged $42?" }
}