{
  "schema_version": "lifeloop.v0.2",
  "event": "session.started",
  "event_id": "evt-session-1",
  "adapter_id": "codex",
  "adapter_version": "0.1.0",
  "integration_mode": "native_hook",
  "invocation_id": "inv-session-1",
  "harness_session_id": "session-fixture-1",
  "payload_refs": [],
  "sequence": 1,
  "idempotency_key": "idem-session-1"
}
