<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=504649) </details> <!--IssueSummary end--> When creating a merge request the default setting for if the source branch should be deleted after merging is controlled by `projects.remove_source_branch_after_merge`. A branch specific setting is created as part of https://gitlab.com/gitlab-org/gitlab/-/issues/504648 The branch level setting should be applicable at least when: - creating merge requests that are targeting the configured protected branch (https://gitlab.com/gitlab-org/gitlab/-/blob/5001d20f96a2c2b684cd4afd1e91521c2de01712/app/services/merge_requests/build_service.rb#L57-63) - when merging merge requests (https://gitlab.com/gitlab-org/gitlab/-/blob/5001d20f96a2c2b684cd4afd1e91521c2de01712/app/services/merge_requests/merge_service.rb#L126-129)