Service-check monitors with empty options.groupby are silently skipped, causing incomplete migrations

[DaniloGT]

Monitors.pre_resource_action_hook raises SkipResource for any service check monitor that has an empty or missing options.groupby. While this avoids a hard failure on sync, it means these monitors are silently dropped from the destination.

datadog-sync-cli/datadog_sync/model/monitors.py

Lines 80 to 88 in 8d60e76

	if resource.get("type") == "service check":
	groupby = (resource.get("options") or {}).get("groupby", [])
	if not groupby:
	raise SkipResource(
	_id,
	self.resource_type,
	"Deprecated resource configuration: Custom check monitor requires at least one group-by. "
	"Update the source monitor's options.groupby before syncing.",
	)

The following service check monitor has no options.groupby, yet it groups by service in the query and syncs successfully once the guard is commented out and the tool is built from source (some fields redacted):

{
  "id": xxx,
  "org_id": xxx,
  "type": "service check",
  "name": "XXX",
  "message": "XXX",
  "query": "\"datadog.agent.up\".over(\"project:XXX\").by(\"service\").last(2).count_by_status()",
  "options": {
    "thresholds": {
      "critical": 1,
      "warning": 1,
      "ok": 1
    },
    "notify_audit": false,
    "notify_no_data": true,
    "no_data_timeframe": 2,
    "renotify_interval": 0,
    "timeout_h": 0,
    "include_tags": false,
    "new_group_delay": 0,
    "silenced": {}
  },
  "multi": true,
  "created_at": 1763400204000,
  "created": "2025-11-17T17:23:24.665593+00:00",
  "modified": "2026-06-12T15:40:55.978811+00:00",
  "deleted": null,
  "priority": 3,
  "restricted_roles": null,
  "draft_status": "published",
  "overall_state_modified": "2025-11-28T18:15:56+00:00",
  "overall_state": "OK",
  "creator": {
    "name": "XXX",
    "email": "XXX",
    "handle": "XXX,
    "id": XX
  },
  "matching_downtimes": []
}

[cnagamor]

I'm running into the same issue.
FWIW, if I try to manually add groupby under options, I get a 400 error from the API:

2026-07-30 18:28:26,168 - WARNING - monitor create failed status=400 id=123 type='service check' query='"datadog.agent.up".over("team:test").by("host").last(2).count_by_status()' reason='400 Bad Request - {"errors":["Invalid monitor option: groupby"]}'

Only way I've been able to import any service check monitors is to comment out the groupby check code.