Railcross prevents your teams from merging pull requests outside merge windows. Merge windows allow you to restrict the days and times that pull requests may be merged.

Think of it as a railway crossing, you can't cross until the train has passed. 🚂

Railcross is a low-overhead app and simply prevents your team from merging between 0900 and 1600. It does this by locking the branch protection rule of your default branch. Any existing branch protection rules (even on the same branch) are not affected.