pull_request_rules:
- name: ping author on conflicts and add 'needs-rebase' label
  conditions:
      - conflict
      - -closed
  actions:
    label:
      add:
        - needs-rebase
    comment:
      message: >
       This pull request has merge conflicts that must be resolved before it
       can be merged. @{{author}} please rebase it.
       https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

- name: remove 'needs-rebase' label when conflict is resolved
  conditions:
      - -conflict
      - -closed
  actions:
    label:
      remove:
        - needs-rebase