Version updated for https://github.com/lecodeski/merge-upstream-defaults to version 1.0. This action is used across all versions by ? repositories. Action Type This is a Composite action. Go to the GitHub Marketplace to find the latest changes. Action Summary This GitHub Action, Merge Upstream, automates the process of merging changes from a specified branch of an upstream repository into a branch of the current repository, making it particularly useful for keeping forks up-to-date. It supports fast-forward-only merges and works with public upstream repositories, reducing manual effort in maintaining branch consistency.