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Introduction: A New Era for Managing Large Software Changes
Software development has entered a period where teams are shipping larger, more complex features faster than ever before. However, speed often creates a new challenge: massive pull requests that become difficult to review, slow down collaboration, and increase the risk of hidden bugs entering production.
GitHub is addressing this growing problem with the public preview of Stacked Pull Requests, a new workflow designed to break large code changes into smaller, logically organized pull requests. Instead of forcing developers and reviewers to analyze thousands of lines of code in a single overwhelming change, stacked pull requests divide work into focused layers that can be reviewed independently while maintaining the relationship between each change.
This approach introduces a more efficient way for engineering teams to collaborate, especially as artificial intelligence coding assistants and accelerated development cycles continue increasing the size and frequency of code contributions.
GitHub Introduces Stacked Pull Requests to Solve the Large PR Problem
Traditional pull requests often become a bottleneck when developers work on major features. A single feature may require dozens of code modifications across multiple files, services, and components. When all changes are submitted together, reviewers face a difficult task: understanding the entire feature while searching for potential issues.
GitHub’s stacked pull requests provide a structured solution by creating an ordered series of smaller pull requests. Each pull request represents one focused layer of a larger change.
Developers can now:
Build large features through smaller, easier-to-understand changes.
Review individual improvements without waiting for the entire project to finish.
Maintain dependencies between related pull requests.
Merge complete stacks or individual layers depending on project needs.
The result is a workflow that makes complex software development feel more manageable and transparent.
How Stacked Pull Requests Change the Development Workflow
The core idea behind stacked pull requests is simple: large changes should not always be reviewed as one massive package.
Instead of creating one large branch containing every modification, developers create multiple branches where each branch builds on top of the previous one.
For example:
A developer building a new authentication system might create:
Pull Request 1: Add database changes.
Pull Request 2: Add backend authentication logic.
Pull Request 3: Add API updates.
Pull Request 4: Add frontend integration.
Each pull request can be reviewed separately while still forming one complete feature.
This allows teams to identify problems earlier, provide better feedback, and reduce the mental workload placed on reviewers.
Developers Can Review Code Faster Without Losing Quality
One of the biggest advantages of stacked pull requests is improved code review quality.
Large pull requests often force reviewers to rush. When hundreds or thousands of changes appear at once, it becomes harder to understand the purpose behind each modification.
With stacked pull requests, reviewers can focus on smaller sections of functionality.
This improves:
Code readability.
Bug detection.
Security analysis.
Testing accuracy.
Developer communication.
GitHub also keeps existing protections in place, meaning required reviews, automated checks, and branch protection rules continue working normally.
Major Companies Are Already Using GitHub Stacked PRs
GitHub highlighted that several major engineering teams have already adopted stacked pull request workflows.
The Next.js team at Vercel reported that stacked pull requests helped them introduce smaller changes while still delivering larger features. By separating work into focused pull requests, developers could improve review speed without sacrificing engineering standards.
Tim Neutkens, Next.js lead at Vercel, explained that stacked PRs allowed the team to ship larger features through smaller individual changes, making reviews easier and more effective.
This demonstrates that the workflow is not only theoretical but already providing value in real-world software environments.
AI Development Creates a New Need for Better Code Review Systems
The rise of AI-powered coding tools has changed how developers write software.
Tools such as GitHub Copilot can help engineers generate code faster, but increased productivity creates another challenge: reviewing more code in less time.
Organizations like TED have experienced this shift. According to Andy Merryman, CTO of TED, AI increased developer productivity but also created a bottleneck because pull requests became larger and more difficult to review.
Stacked pull requests address this problem by allowing AI-assisted development and human review to work together more efficiently.
Instead of asking reviewers to examine large AI-generated changes all at once, teams can analyze smaller, dependency-based improvements.
GitHub CLI Makes Creating Stacks Simple
GitHub has introduced a dedicated CLI extension that allows developers to create and manage stacked pull requests directly from the terminal.
Developers can install the extension using:
gh extension install github/gh-stack
After installation, teams can create stacks from the command line or through GitHub interfaces.
The workflow allows developers to:
Create a starting branch.
Add new branches on top of existing changes.
Create pull requests targeting previous layers.
Track relationships between stacked changes.
This provides a cleaner alternative to manually rebasing multiple branches during large development projects.
GitHub Expands Stacked PR Support Across Development Platforms
Stacked pull requests are designed to work across multiple GitHub environments.
Developers can manage stacks through:
GitHub.com.
GitHub CLI.
GitHub Mobile.
AI coding environments using GitHub Copilot skills.
This flexibility allows teams to adopt stacked workflows without completely changing their existing development habits.
The feature also integrates with GitHub’s existing ecosystem, including reviews, automated checks, and merge requirements.
One-Click Merging Makes Large Features Easier to Deliver
Another important improvement is simplified merging.
When a developer completes a stack, GitHub allows the latest ready pull request to merge the entire stack underneath it in a single operation.
Teams can also merge only specific layers when necessary.
If lower-level changes are merged first, higher-level pull requests automatically update and retarget themselves.
This reduces manual branch management and removes much of the friction traditionally associated with large feature development.
Security and Reliability Benefits of Stacked Pull Requests
Although stacked pull requests are mainly designed for productivity, they also provide security advantages.
Smaller pull requests make security reviews more accurate because reviewers can focus on specific changes instead of searching through massive code differences.
Security teams can more easily identify:
Authentication changes.
Permission modifications.
Dependency updates.
Potential vulnerabilities.
For organizations managing sensitive applications, improving review visibility can become an important part of secure software development practices.
Deep Analysis: Managing GitHub Stacked Pull Requests from the Command Line
Developers can combine GitHub stacked pull requests with standard Git workflows and automation tools.
Checking current branches:
git branch
Creating a new feature layer:
git checkout -b feature/database-layer
Adding changes:
git add . git commit -m "Add database foundation"
Pushing the branch:
git push origin feature/database-layer
Installing GitHub stack support:
gh extension install github/gh-stack
Viewing GitHub authentication status:
gh auth status
Managing pull requests:
gh pr list
Reviewing pull request details:
gh pr view <number>
Checking repository status:
git status
Updating a branch:
git pull --rebase
Stacked development requires developers to maintain clear dependency relationships between branches. Automation, testing pipelines, and continuous integration systems become even more important because every layer must remain stable before the entire stack reaches production.
What Undercode Say:
GitHub Stacked Pull Requests represent a significant evolution in how modern software teams manage complexity.
The traditional pull request model was designed for a slower development environment where changes were smaller and easier to understand.
Today, engineering teams operate differently.
Cloud platforms, artificial intelligence tools, microservices, and global collaboration have increased the volume of code being produced.
The biggest challenge is no longer only writing code.
The challenge is understanding, validating, and safely integrating that code.
Stacked pull requests directly target this problem.
By dividing large features into smaller layers, GitHub is improving the relationship between developers and reviewers.
The concept is similar to modular software architecture.
A well-designed application is easier to maintain when individual components have clear responsibilities.
The same principle now applies to code reviews.
Each pull request becomes a meaningful building block rather than a giant collection of unrelated modifications.
This approach can also improve security.
Security researchers and internal teams often struggle with reviewing large changes because vulnerabilities can hide inside thousands of lines of code.
Smaller changes create better visibility.
They allow teams to ask better questions:
Why was this change introduced?
Does this permission update create a security risk?
Could this dependency modification expose the application?
The growth of AI coding assistants makes this even more important.
AI can generate code quickly, but human oversight remains essential.
The future of software development will likely involve collaboration between AI systems and human engineers.
GitHub Stacked Pull Requests provide infrastructure for that future by making review workflows scalable.
However, organizations must also maintain discipline.
Poorly structured stacks could create unnecessary complexity if developers create too many dependent layers.
Successful adoption requires clear development guidelines.
Teams should define:
When to create a stack.
How large each layer should be.
How testing should be handled.
Who approves each stage.
The feature also highlights a broader industry movement toward intelligent developer productivity tools.
The next generation of software engineering will not only focus on writing more code.
It will focus on creating systems that help humans understand, verify, and improve code faster.
GitHub’s stacked pull requests are another step toward that goal.
✅ GitHub has introduced stacked pull requests as a public preview feature designed to improve large code change management.
✅ The feature supports smaller reviewable pull requests while maintaining relationships between dependent changes.
✅ GitHub CLI support, merge workflows, and integration with existing reviews and branch protections are part of the rollout.
Prediction
(+1) Positive prediction:
Stacked pull requests are likely to become popular among large engineering teams managing complex applications.
AI-assisted programming will increase demand for better code review systems, making workflows like stacked PRs more valuable.
More development platforms may introduce similar layered review models in the future.
Some smaller teams may avoid adoption because additional branch management concepts could initially feel complicated.
Poorly organized stacks could create dependency confusion if teams do not establish clear workflow rules.
The Future of Software Collaboration With GitHub Stacked Pull Requests
GitHub’s introduction of stacked pull requests reflects a broader transformation in software engineering.
As development becomes faster, teams need better systems for controlling complexity.
The future will not only belong to developers who can create code quickly. It will belong to teams that can review, secure, and deliver changes intelligently.
Stacked pull requests provide a foundation for that future by turning large software projects into organized, understandable, and collaborative workflows.
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