Avoid all the manual work by automatically closing stories when the epic is completed.
Issue transitioned event
Create a new rule and name it appropriately.
Providing a description will help you to identify what the rule does but this step is optional.
Add a Trigger → Issue transitioned event
Add the following boolean expression:
Next to the JQL condition click on Add → Selector → Issue selector.
Select Issues under epic/ stories
Next to the Issue selector click on Add → Condition → Boolean condition
Add the following expression:
Next to the JQL condition click on Add → Action → Transition issue
Choose transition to status
Enable the rule by clicking on the Enable button →
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