About protected branches - GitHub Docs

Tip If you use branch protection rules that require specific status checks, make sure that job names are unique across all workflows. Using the same job name in multiple workflows can cause ambiguous status check results and block pull requests from being merged. See About status checks. You can enforce certain workflows or requirements before a collaborator can push changes to a branch in your re

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* Can't be force pushed * Can't be deleted * Can't have changes merged into them until required status checks pass