Available rules for rulesets

You can create branch or tag rulesets to control how users can interact with selected branches and tags in a repository. You can also create push rulesets to block pushes to a private or internal repository and that repository's entire fork network.

When you create a ruleset, you can allow certain users to bypass the rules in the ruleset. This can be users with certain roles, specific teams, or GitHub Apps.

For push rulesets, bypass permissions apply to a repository and the repository's entire fork network. This means that the only users who can bypass this ruleset for any repository in this repository's entire fork network are the users who can bypass this ruleset in the root repository.

For more information on creating rulesets and bypass permissions, see "Creating rulesets for a repository."

Restrict creations

If selected, only users with bypass permissions can create branches or tags whose name matches the pattern you specify.

Restrict updates

If selected, only users with bypass permissions can push to branches or tags whose name matches the pattern you specify.

Restrict deletions

If selected, only users with bypass permissions can delete branches or tags whose name matches the pattern you specify. This rule is selected by default.

Require linear history

Enforcing a linear commit history prevents collaborators from pushing merge commits to the targeted branches or tags. This means that any pull requests merged into the branch or tag must use a squash merge or a rebase merge. A strictly linear commit history can help teams revert changes more easily. For more information about merge methods, see "About pull request merges."

Before you can require a linear commit history, your repository must allow squash merging or rebase merging. For more information, see "Configuring pull request merges."

Require deployments to succeed before merging

You can require that changes are successfully deployed to specific environments before a branch can be merged. For example, you can use this rule to ensure that changes are successfully deployed to a staging environment before the changes merge to your default branch.

Require signed commits

When you enable required commit signing on a branch, contributors and bots can only push commits that have been signed and verified to the branch. For more information, see "About commit signature verification."

Branch protection rules and rulesets behave differently when you create a branch: with rulesets, we check only the commits that aren't accessible from other branches, whereas with branch protection rules, we do not verify signed commits unless you restrict pushes that create matching branches. With both, when you update a branch, we still check all the commits in the specified range, even if a commit is reachable from other branches.

With both methods, we use the verified_signature? to confirm if a commit has a valid signature. If not, the update is not accepted.

You can always push local commits to the branch if the commits are signed and verified. You can also merge signed and verified commits into the branch using a pull request on GitHub. However, you cannot squash and merge a pull request into the branch on GitHub unless you are the author of the pull request. You can squash and merge pull requests locally. For more information, see "Checking out pull requests locally."

For more information about merge methods, see "About merge methods on GitHub."

Require a pull request before merging

You can require that all changes to the target branch be associated with a pull request. The pull request doesn't necessarily have to be approved, but it must be opened.

Additional settings

Repository administrators or custom roles with the "edit repository rules" permission can require that all pull requests receive a specific number of approving reviews before someone merges the pull request into a protected branch. You can require approving reviews from people with write permissions in the repository or from a designated code owner.

If you enable required reviews, collaborators can only push changes to a branch via a pull request that is approved by the required number of reviewers with write permissions.

If someone chooses the Request changes option in a review, then that person must approve the pull request before the pull request can be merged. If a reviewer who requests changes on a pull request isn't available, anyone with write permissions for the repository can dismiss the blocking review.

Even after all required reviewers have approved a pull request, collaborators cannot merge the pull request if there are other open pull requests that have a head branch pointing to the same commit with pending or rejected reviews. Someone with write permissions must approve or dismiss the blocking review on the other pull requests first.

Optionally, you can choose to dismiss stale pull request approvals when commits are pushed that affect the diff in the pull request. GitHub records the state of the diff at the point when a pull request is approved. This state represents the set of changes that the reviewer approved. If the diff changes from this state (for example, because a contributor pushes new changes to the pull request branch or clicks Update branch, or because a related pull request is merged into the target branch), the approving review is dismissed as stale, and the pull request cannot be merged until someone approves the work again. For information about the target branch, see "About pull requests."

Optionally, you can choose to require reviews from code owners. If you do, any pull request that modifies content with a code owner must be approved by that code owner before the pull request can be merged into the protected branch. Note that if code has multiple owners, an approval from any of the code owners will be sufficient to meet this requirement. For more information, see "About code owners."

Optionally, you can require an approval from someone other than the last person to push to a branch before a pull request can be merged. This means at least one other authorized reviewer has approved any changes. For example, the "last reviewer" can check that the latest set of changes incorporates feedback from other reviews, and does not add new, unreviewed content.

For complex pull requests that require many reviews, requiring an approval from someone other than the last person to push can be a compromise that avoids the need to dismiss all stale reviews: with this option, "stale" reviews are not dismissed, and the pull request remains approved as long as someone other than the person who made the most recent changes approves it. Users who have already reviewed a pull request can reapprove after the most recent push to meet this requirement. If you are concerned about pull requests being "hijacked" (where unapproved content is added to approved pull requests), it is safer to dismiss stale reviews.

Optionally, you can require all comments on the pull request to be resolved before it can be merged to a branch. This ensures that all comments are addressed or acknowledged before merge.

Require status checks to pass before merging

Required status checks ensure that all required CI tests are passing before collaborators can make changes to a branch or tag targeted by your ruleset. Required status checks can be checks or statuses. For more information, see "About status checks."

You can use the commit status API to allow external services to mark commits with an appropriate status. For more information, see "REST API endpoints for commit statuses."

After enabling required status checks, all required status checks must pass before collaborators can merge changes into the branch or tag.

Any person or integration with write permissions to a repository can set the state of any status check in the repository, but in some cases you may only want to accept a status check from a specific GitHub App. When you add a required status check rule, you can select an app as the expected source of status updates. The app must be installed in the repository with the statuses:write permission, must have recently submitted a check run, and must be associated with a pre-existing required status check in the ruleset. If the status is set by any other person or integration, merging won't be allowed. If you select "any source", you can still manually verify the author of each status, listed in the merge box.

You can think of required status checks as being either "loose" or "strict." The type of required status check you choose determines whether your branch is required to be up to date with the base branch before merging.

Type of required status check	Setting	Merge requirements	Considerations
Strict	The Require branches to be up to date before merging checkbox is checked.	The topic branch must be up to date with the base branch before merging.	This is the default behavior for required status checks. More builds may be required, as you'll need to bring the head branch up to date after other collaborators update the target branch.
Loose	The Require branches to be up to date before merging checkbox is not checked.	The branch does not have to be up to date with the base branch before merging.	You'll have fewer required builds, as you won't need to bring the head branch up to date after other collaborators merge pull requests. Status checks may fail after you merge your branch if there are incompatible changes with the base branch.
Disabled	The Require status checks to pass before merging checkbox is not checked.	The branch has no merge restrictions.	If required status checks aren't enabled, collaborators can merge the branch at any time, regardless of whether it is up to date with the base branch. This increases the possibility of incompatible changes.

For troubleshooting information, see "Troubleshooting required status checks."

Set code scanning merge protection

If your repositories are configured with code scanning, you can use rulesets to prevent pull requests from being merged when one of the following conditions is met:

• A required tool found a code scanning alert of a severity that is defined in a ruleset.

• A required code scanning tool's analysis is still in progress.

• A required code scanning tool is not configured for the repository.

For more information, see "Set code scanning merge protection." For more general information about code scanning, see "About code scanning."

Block force pushes

You can prevent users from force pushing to the targeted branches or tags. This rule is enabled by default.

If someone force pushes to a branch or tag, commits that other collaborators have based their work on may be removed from the history of the branch or tag. This may lead to merge conflicts or corrupted pull requests. Force pushing can also be used to delete branches or point a branch to commits that were not approved in a pull request.

Enabling force pushes will not override any other rules. For example, if a branch requires a linear commit history, you cannot force push merge commits to that branch.

Restrict file paths

Prevent commits that include changes in specified file paths from being pushed to the repository.

You can use fnmatch syntax for this. For example, a restriction targeting test/demo/**/* prevents any pushes to files or folders in the test/demo/ directory. A restriction targeting test/docs/pushrules.md prevents pushes specifically to the pushrules.md file in the test/docs/ directory. For more information, see "Creating rulesets for a repository."

Restrict file path length

Prevent commits that include file paths that exceed a specified character limit from being pushed to the repository.

Restrict file extensions

Prevent commits that include files with specified file extensions from being pushed to the repository.

Restrict file size

Prevent commits that exceed a specified file size limit from being pushed to the repository.