How to include the item count in an Artifact or Slack message?

I wanted to include the number of items found in a Slack response, but not the whole list as it’s huge.

How can I include the item count into an Artifact or Slack message as the length() command is only supported in Filter Steps and Automated Decisions.

It isn’t pretty, but you could loop through the array and have the loop output be count? You might need a step in the loop, but you could do a filter and only continue if 1=1 that should be fast