Code Owners (PREMIUM ALL)

Use the Code Owners feature to define who has expertise for specific parts of your project's codebase. Define the owners of files and directories in a repository to:

• Require owners to approve changes. Combine protected branches with Code Owners to require experts to approve merge requests before they merge into a protected branch.

• Identify owners. Code Owner names are displayed on the files and directories they own:

  

Combine Code Owners with merge request approval rules (either optional or required) to build a flexible approval workflow:

• Use Code Owners to ensure quality. Define the users who have domain expertise for specific paths in your repository.
• Use Approval rules to define areas of expertise that don't correspond to specific file paths in your repository. Approval rules help guide merge request creators to the correct set of reviewers, such as frontend developers or a security team.

For example:

View Code Owners of a file or directory

To view the Code Owners of a file or directory:

1. On the left sidebar, select Search or go to and find your project.
2. Select Code > Repository.
3. Go to the file or directory you want to see the Code Owners for.
4. Optional. Select a branch or tag.

GitLab shows the Code Owners at the top of the page.

Set up Code Owners

Prerequisites:

• You must be able to either push to the default branch or create a merge request.

1. Create a CODEOWNERS file in your preferred location.
2. Define some rules in the file following the Code Owners syntax reference. Some suggestions:
   • Configure All eligible approvers approval rule.
   • Require Code Owner approval on a protected branch.
3. Commit your changes, and push them up to GitLab.

CODEOWNERS file

A CODEOWNERS file (with no extension) specifies the users or shared groups responsible for specific files and directories in a repository.

Each repository uses a single CODEOWNERS file. GitLab checks these locations in your repository in this order. The first CODEOWNERS file found is used, and all others are ignored:

1. In the root directory: ./CODEOWNERS.
2. In the docs directory: ./docs/CODEOWNERS.
3. In the .gitlab directory: ./.gitlab/CODEOWNERS.

For more information, see Code Owners syntax and error handling.

When user or group change names

When a user or group change their names, the CODEOWNERS isn't automatically updated with the new names. To enter the new names, you must edit the file.

Organizations using SAML SSO can set usernames to prevent users from being able to change their usernames.

Add a group as a Code Owner

To set the members of a group or subgroup as a Code Owner:

In the CODEOWNERS file, enter text that follows one of these patterns:

# All group members as Code Owners for a file
file.md @group-x

# All subgroup members as Code Owners for a file
file.md @group-x/subgroup-y

# All group and subgroup members as Code Owners for a file
file.md @group-x @group-x/subgroup-y

Group inheritance and eligibility

graph TD
    A[Parent group X] -->|owns| B[Project A]
    A -->|contains| C[Subgroup Y]
    C -->|owns| D[Project B]
    A-. inherits ownership .-> D

In this example:

• Parent group X (group-x) owns Project A.
• Parent group X also contains a subgroup, Subgroup Y. (group-x/subgroup-y)
• Subgroup Y owns Project B.

The eligible Code Owners are:

• Project A: the members of Group X only, because Project A doesn't belong to Subgroup Y.
• Project B: the members of both Group X and Subgroup Y.

Inviting subgroups to projects in parent groups

You can invite Subgroup Y to Project A so that their members also become eligible Code Owners.

graph LR
    A[Parent group X] -->|owns| B[Project A]
    A -->|also contains| C[Subgroup Y]
    C -.->D{Invite Subgroup Y<br/>to Project A?} -.->|yes| E[Members of Subgroup Y<br/>can submit Approvals]
    D{Invite Subgroup Y<br/>to Project A?} -.->|no| F[Members of Subgroup Y<br />cannot submit Approvals]
    E -.->|Add Subgroup Y<br/> as Code Owner to Project A| I[Approvals can be<br/>required] -.-> B
    F -.-> |Add Subgroup Y<br/> as Code Owners to Project A| J[Approvals can only<br/>be optional] -.-> B

If you do not invite Subgroup Y to Project A, but make them Code Owners, their approval of the merge request becomes optional.

Inviting subgroups to parent groups

Inviting Subgroup Y to a parent group of Project A is not supported. To set Subgroup Y as Code Owners, invite this group directly to the project itself.

NOTE: For approval to be required, groups as Code Owners must have a direct membership (not inherited membership) in the project. Approval can only be optional for groups that inherit membership. Members in the Code Owners group also must be direct members, and not inherit membership from any parent groups.

Define more specific owners for more specifically defined files or directories

When a file or directory matches multiple entries in the CODEOWNERS file, the users from last pattern matching the file or directory are used. This enables you to define more specific owners for more specifically defined files or directories, when you order the entries in a sensible way.

For example, in the following CODEOWNERS file:

# This line would match the file terms.md
*.md @doc-team

# This line would also match the file terms.md
terms.md @legal-team

The Code Owner for terms.md would be @legal-team.

If you use sections, the last pattern matching the file or directory for each section is used. For example, in a CODEOWNERS file using sections:

[README Owners]
README.md @user1 @user2
internal/README.md @user4

[README other owners]
README.md @user3

The Code Owners for the README.md in the root directory are @user1, @user2, and @user3. The Code Owners for internal/README.md are @user4 and @user3.

Only one CODEOWNERS pattern per section is matched to a file path.

Organize Code Owners by putting them into sections

You can organize Code Owners by putting them into named sections.

You can use sections for shared directories, so that multiple teams can be reviewers.

To add a section to the CODEOWNERS file, enter a section name in square brackets, followed by the files or directories, and users, groups, or subgroups:

[README Owners]
README.md @user1 @user2
internal/README.md @user2

Each Code Owner in the merge request widget is listed under a label. The following image shows Groups and Documentation sections:

Set default owner for a section

• Introduced in GitLab 15.11 with a flag named codeowners_default_owners. Disabled by default.
• Generally available in GitLab 15.11. Feature flag codeowners_default_owners removed.

If multiple file paths inside a section share the same ownership, define default Code Owners for the section. All paths in that section inherit this default, unless you override the section default on a specific line.

Default owners are applied when specific owners are not specified for file paths. Specific owners defined beside the file path override default owners.

For example:

[Documentation] @docs-team
docs/
README.md

[Database] @database-team @agarcia
model/db/
config/db/database-setup.md @docs-team

In this example:

• @docs-team owns all items in the Documentation section.
• @database-team and @agarcia own all items in the Database section except config/db/database-setup.md, which has an override assigning it to @docs-team.

Compare this behavior to when you use regular entries and sections together, when entries in sections don't override entries without sections.

Use default owners and optional sections together

To combine the syntax for default owners with optional sections and required approvals, place default owners at the end:

[Documentation][2] @docs-team
docs/
README.md

^[Database] @database-team
model/db/
config/db/database-setup.md @docs-team

Use regular entries and sections together

If you set a default Code Owner for a path outside a section, their approval is always required. Such entries aren't overridden by sections. Entries without sections are treated as if they were another, unnamed section:

# Required for all files
* @general-approvers

[Documentation] @docs-team
docs/
README.md
*.txt

[Database] @database-team
model/db/
config/db/database-setup.md @docs-team

In this example:

• @general-approvers owns all items everywhere, without overrides.
• @docs-team owns all items in the Documentation section.
• @database-team owns all items in the Database section except config/db/database-setup.md, which has an override assigning it to @docs-team.
• A merge request that modifies model/db/CHANGELOG.txt would require three approvals: one from each of the @general-approvers,@docs-team, and @database-team groups.

Compare this behavior to when you use only default owners for sections, when specific entries in a section override the section default.

Sections with duplicate names

If multiple sections have the same name, they are combined. Also, section headings are not case-sensitive. For example:

[Documentation]
ee/docs/    @docs
docs/       @docs

[Database]
README.md  @database
model/db/   @database

[DOCUMENTATION]
README.md  @docs

This code results in three entries under the Documentation section header, and two entries under Database. The entries defined under the sections Documentation and DOCUMENTATION are combined, using the case of the first section.

Make a Code Owners section optional

You can designate optional sections in your Code Owners file. Optional sections enable you to designate responsible parties for various parts of your codebase, but not require approval from them. This approach provides a more relaxed policy for parts of your project that are frequently updated, but don't require stringent reviews.

To treat the entire section as optional, prepend the section name with the caret ^ character.

In this example, the [Go] section is optional:

[Documentation]
*.md @root

[Ruby]
*.rb @root

^[Go]
*.go @root

The optional Code Owners section displays in merge requests under the description:

If a section is duplicated in the file, and one of them is marked as optional and the other isn't, the section is required.

Optional sections in the CODEOWNERS file are treated as optional only when changes are submitted by using merge requests. If a change is submitted directly to the protected branch, approval from Code Owners is still required, even if the section is marked as optional.

Require multiple approvals from Code Owners

Introduced in GitLab 15.9.

You can require multiple approvals for the Code Owners sections in the Approvals area in merge requests. Append the section name with a number n in brackets, for example, [2] or [3]. This requires n approvals from the Code Owners in this section. Valid entries for n are integers ≥ 1. [1] is optional because it is the default. Invalid values for n are treated as 1.

WARNING: Issue 384881 proposes changes to the behavior of this setting. Do not intentionally set invalid values. They may become valid in the future and cause unexpected behavior.

To require multiple approvals from Code Owners:

1. On the left sidebar, select Search or go to and find your project.
2. Select Settings > Repository.
3. Expand Protected branches.
4. Next to the default branch, turn on the toggle under Code owner approval.
5. Edit the CODEOWNERS file to add a rule for multiple approvals.

For example, to require two approvals for the [Documentation] section:

[Documentation][2]
*.md @tech-writer-team

[Ruby]
*.rb @dev-team

The Documentation Code Owners section in the Approvals area displays two approvals are required:

Allowed to push

Users who are Allowed to push can choose to create a merge request for their changes, or push the changes directly to a branch. If the user skips the merge request process, the protected branch features and Code Owner approvals built into merge requests are also skipped.

This permission is often granted to accounts associated with automation (internal users) and release tooling.

All changes from users without the Allowed to push permission must be routed through a merge request.

Related topics

• Syntax reference
• Development guidelines

Troubleshooting

When working with Code Owners, you might encounter the following issues.

For more information about how the Code Owners feature handles errors, see the Code Owners reference.

Approvals shown as optional

A Code Owner approval rule is optional if any of these conditions are true:

• The user or group is not a member of the project. Code Owners cannot inherit members from parent groups.
• Code Owner approval on a protected branch has not been set up.
• The section is marked as optional.
• No eligible code owners are available to approve the merge request due to conflicts with other merge request approval settings.

Approvals do not show

Code Owner approval rules only update when the merge request is created. If you update the CODEOWNERS file, close the merge request and create a new one.

User not shown as possible approver

A user might not show as an approver on the Code Owner merge request approval rules if any of these conditions are true:

• A rule prevents the specific user from approving the merge request. Check the project merge request approval settings.
• A Code Owner group has a visibility of private, and the current user is not a member of the Code Owner group.
• Current user is an external user who does not have permission to the internal Code Owner group.

Approval rule is invalid

You might get an error that states:

Approval rule is invalid.
GitLab has approved this rule automatically to unblock the merge request.

This issue occurs when an approval rule uses a Code Owner that is not a direct member of the project.

The workaround is to check that the group or user has been invited to the project.