GitHub Stacked PRs Hit Public Preview

GitHub’s stacked pull requests went into public preview on July 30, 2026. Stacks turn one large change into an ordered chain of small, reviewable PRs with one-click merge, plus a gh-stack skill for coding agents.

Key caveats noted: public preview behavior can change; per-layer required checks multiply CI runs; stacks assume linear ordered work; auto-rebase helps only if layers stay small. Companion feature: stacked sessions in the GitHub Copilot app.