Script which can backfill issues for the action. Possibly it fires when installed to the repository, or maybe it can just be run once to establish the branch and the issue backlog. Users should probably be allowed to decide whether to backfill or not so doing it automatically maybe isn't the way to go.
Since the actions can be run from the 'Actions' menu in GitHub it probably makes sense to create a new action that does the backfilling, configured to run against only open, only closed, or both open and closed issues.
Script which can backfill issues for the action. Possibly it fires when installed to the repository, or maybe it can just be run once to establish the branch and the issue backlog. Users should probably be allowed to decide whether to backfill or not so doing it automatically maybe isn't the way to go.
Since the actions can be run from the 'Actions' menu in GitHub it probably makes sense to create a new action that does the backfilling, configured to run against only open, only closed, or both open and closed issues.