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GitHub’s native stacked pull requests let you split dependent work into a chain of focused PRs while GitHub tracks how those PRs fit together. The change is GitHub’s coordinated interface, review requirements, and merge handling—not a new branching feature in Git itself. GitHub announced general availability on October 6, 2026, for all plans on github.com.
What a GitHub pull-request stack is
A stack is a sequence of dependent branches and pull requests in one repository. The first PR targets a trunk branch such as main; each later PR targets the branch associated with the PR directly below it. For example:
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main ← PR1 ← PR2 ← PR3
PR2 builds on PR1, and PR3 builds on PR2. Each PR can show a focused diff for review, while GitHub’s stack context makes the dependency chain visible. GitHub describes the underlying Git operations as standard; native stacks add GitHub-managed recognition and handling of the chain. GitHub’s stacked pull requests documentation explains the model.
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Stack membership appears in the GitHub workflow
Instead of treating each PR as unrelated, GitHub surfaces where it sits in the stack. Reviewers can concentrate on one layer’s changes and still see the work it depends on. The intent is to make a larger change reviewable as smaller PRs without hiding their relationship.
Rules and merges account for dependencies
GitHub applies the rules of the stack’s base branch to every PR in the stack. A stack must have a fully linear history between its branches before merging. Merges proceed from the bottom upward: a lower PR must land before the dependent PR above it can be merged. You can merge the whole stack or a lower portion; after lower work lands, GitHub rebases and retargets the remaining stack as appropriate. See the official reference for the documented workflow.
How review and merging work
- Open the bottom PR. Create the first branch from the trunk branch and open a PR targeting that trunk branch.
- Add dependent layers. Create each next branch from the preceding layer and open its PR against the preceding PR’s branch. Keep every branch in the same repository.
- Review the focused changes. Review each PR’s diff as its own layer, using the stack information to understand dependencies.
- Meet the base branch’s requirements. Every PR is subject to applicable required reviews, status checks, and CODEOWNER approvals for the stack’s base branch.
- Merge from the bottom up. Land the bottom PR first, then proceed upward. A lower portion can land without merging the entire chain; the remaining branches are rebased and retargeted as needed.
GitHub’s October 6 announcement says stacks enter and land through merge queue as one merge group. It also describes preservation of approvals when rebased code is unchanged, signed replacement commits after rebases, and automatic retargeting rather than closing the bottom PR when its base branch is deleted. These behaviors are announcement claims as of that date. GitHub said stack auto-merge was rolling out over the following weeks, so the announcement alone does not establish that the rollout was complete. Read the October 6, 2026 announcement.
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Availability and supported tools
GitHub announced stacked pull requests as generally available on October 6, 2026, for all github.com plans. The announcement said GitHub Enterprise Server support would arrive in an upcoming release; it does not establish that a particular Enterprise Server release includes the feature. Some GitHub documentation pages still display public-preview notices, but those notices are older than the dated GA announcement.
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The gh stack GitHub CLI extension supports local branch-stack operations. GitHub also documents webhook and REST API support and read-only GraphQL fields for stack information, which can be used by automation. GitHub Desktop does not support stacks. GitHub’s documentation covers the integrations and limitations.
When native stacks are useful—and what they do not solve
Stacks fit work that naturally divides into dependent, reviewable layers: for example, a foundation change followed by code that depends on it, then a feature built on that code. The chain can let reviewers assess smaller diffs while the stack view preserves the overall order.
Native support does not make dependent changes independent, nor does it remove the need to keep branches coherent and correctly ordered. If layers are frequently rewritten or their dependencies are unclear, reviewers and maintainers still need to manage that complexity. The product coordinates the workflow; it does not decide how to divide the work.
- Use a stack when the work has a real dependency order and smaller PRs help review.
- Keep a single PR when the changes are tightly coupled and splitting them would make review or integration harder.
- Check your tooling if your workflow depends on GitHub Desktop, since it is not supported for stacks.
How strong is the reported impact?
GitHub’s GA announcement reports that repositories using stacks since public preview merged 9% more code than peers. It also says over two-thirds of the top 1% of repositories use stacked pull requests, and that this group saw a 5% improvement in time-to-merge. These are GitHub-reported comparisons; the announcement does not provide study design or sample size, so the figures are not independent proof that stacks cause those outcomes. GitHub’s announcement provides the figures.
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