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Managing protected branches
You can set up rules to protect certain branches in your repository. For example, you can block pull requests that don't pass status checks or require that pull requests have a specific number of approving reviews before they can be merged.
Important
Protected branches are available in public repositories with GitHub Free and GitHub Free for organizations, and in public and private repositories with GitHub Pro, GitHub Team, GitHub Enterprise Cloud, and GitHub Enterprise Server.
About protected branches
You can protect important branches by setting branch protection rules, which define whether collaborators can delete or force push to the branch and set requirements for any pushes to the branch, such as passing status checks or a linear commit history.
Managing a branch protection rule
You can create a branch protection rule to enforce certain workflows for one or more branches, such as requiring an approving review or passing status checks for all pull requests merged into the protected branch.