JQL for Automation rule, comment on tickets that do not have a comment within x amount of days

[Sierra]

Hoping to create an automation rule that comments on tickets that haven't had any comments on them in x amount of days. 

What I have so far:

"Request Type" = "Report Customer System Issue (SL)" AND status = "Root Cause Undetermined" AND 

[Mikael Sandberg · Accepted solution]

What you are looking for is something similar to the "Resolve issues due to inactivity" automation that you can find in the library. Your query would look something like this:

"Request Type" = "Report Customer System Issue (SL)" AND status = "Root Cause Undetermined" AND updated < -5d

That would trigger the automation to trigger on issues that have not been updated in the past 5 days. 

[Sierra]

Thank you @Mikael Sandberg