GitHub Stacked PR Public Beta: Split large changes into PR chains that can be independently reviewed and merged with one click

On July 30, 2026, GitHub announced that Stacked Pull Requests had entered public beta, supporting the splitting of large changes into an ordered PR chain, independent layer-by-layer reviews, and one-click merging of the entire stack. Based on official changelogs and documentation, this article introduces the branch dependency model, review and CI mechanisms, the getting-started steps for the gh-stack CLI, as well as the collaboration methods with Merge Queue and Copilot Agent and current limitations.