# Optimize PR Routing & CI/CD for Efficient Code Reviews

> Automate pull request routing, selective CI/CD, and labeling to enhance code reviews, boost developer productivity, and ensure quality in software delivery pipelines.

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[Overview](https://linearb.io/platform/programmable-workflows)
[Features](https://linearb.io/platform/programmable-workflows/features#)

### Pull Request Routing

[What is pull request routing?](#pull-request-routing-what-is-pull-request-routing)
[Why should you use pull request routing?](#pull-request-routing-why-should-you-use-pull-request-routing)
[How do you optimize pull request routing?](#pull-request-routing-how-do-you-optimize-pull-request-routing)
[SEI Automations](#pull-request-routing-sei-automations)
[Additional Resources](#pull-request-routing-additional-resources)

### Selective CI/CD

[What is selective CI/CD?](#selective-cicd-what-is-selective-cicd)
[Why should you use selective CI/CD?](#selective-cicd-why-should-you-use-selective-cicd)
[How do you use selective CI/CD?](#selective-cicd-how-do-you-use-selective-cicd)
[SEI Automations](#selective-cicd-sei-automations)
[Additional Resources](#selective-cicd-additional-resources)

### Label Tracking

[What is label tracking?](#label-tracking-what-is-label-tracking)
[Why should you use label tracking?](#label-tracking-why-should-you-use-label-tracking)
[How do you use label tracking?](#label-tracking-how-do-you-use-label-tracking)
[SEI Automations](#label-tracking-sei-automations)
[Additional Resources](#label-tracking-additional-resources)

### SEI Automation Admin Console

[What is the SEI automation admin console?](#sei-automation-admin-console-what-is-the-sei-automation-admin-console)
[Why should you use the SEI automation admin console?](#sei-automation-admin-console-why-should-you-use-the-sei-automation-admin-console)
[How do you use the SEI automation admin console?](#sei-automation-admin-console-how-do-you-use-the-sei-automation-admin-console)

### Automatic Pull Request Labeling

[What is automatic pull request labeling?](#automatic-pull-request-labeling-what-is-automatic-pull-request-labeling)
[Why should you use automatic pull request labeling?](#automatic-pull-request-labeling-why-should-you-use-automatic-pull-request-labeling)
[How do you use automatic pull request labeling?](#automatic-pull-request-labeling-how-do-you-use-automatic-pull-request-labeling)
[SEI Automations](#automatic-pull-request-labeling-sei-automations)
[Additional Resources](#automatic-pull-request-labeling-additional-resources)

### Bot Assistant (WorkerB)

[What is WorkerB?](#bot-assistant-workerb-what-is-workerb)
[Why should you use WorkerB?](#bot-assistant-workerb-why-should-you-use-workerb)
[How do you use WorkerB?](#bot-assistant-workerb-how-do-you-use-workerb)
[Additional Resources](#bot-assistant-workerb-additional-resources)

## Programmable Workflows Features

## Pull Request Routing

### What is pull request routing?

Pull request routing automates merge pathways to unblock code reviews while efficiently enforcing quality standards.

![Bug fix: resolve race condition, assign code experts](https://assets.linearb.io/image/upload/c_fit,w_2560,h_2493/f_auto/q_auto/v1/AssignCodeExperts_Light_-AutomationOnly?_a=BAVMn6ID0)

### Why should you use pull request routing?

Research shows that PR pickup and review time are [the most frequent sources of software delivery inefficiency](https://devinterrupted.substack.com/p/analysis-the-quickest-path-to-halving). For most organizations, this is one of the quickest paths to immediate improvements in software delivery efficiency.

The longer your code waits in the review stage, the bigger the context switch for all involved participants. Extended pickup and review times and excessive code review notifications reduce developer productivity and negatively impact developer experience by hurting developers’ ability to achieve a flow state.

### How do you optimize pull request routing?

1. Automate review responsibilities to balance distributing institutional knowledge with targeted expert reviews, ensuring breadth and depth in your code review capabilities. Ensure reviewers have all the information they need to make adequate decisions about code quality.
2. Reduce the cognitive burden of code reviews through automation, static analysis, improved CI/CD pipelines, and contextual notifications to keep developers informed throughout development.
3. Automate security and compliance enforcement to minimize the burden of remembering complex processes and requirements. Implement guardrails that guide developers toward best practices during the code review process.

### SEI Automations

[Assign code experts](https://docs.gitstream.cm/automations/standard/review-assignment/assign-code-experts/)

[Auto-approve safe changes](https://docs.gitstream.cm/automations/approve-safe-changes/)

[Auto-approve and merge dependabot updates](https://docs.gitstream.cm/automations/integrations/dependabot/approve-dependabot/)

[Welcome newcomer](https://docs.gitstream.cm/automations/welcome-newcomer/)

[Additional review for large PRs](https://docs.gitstream.cm/automations/additional-review-for-large-pr/)

[Approve test changes](https://docs.gitstream.cm/automations/approve-tests/)

[Auto-approve tiny changes](https://docs.gitstream.cm/automations/approve-tiny-changes/)

[Review TODO comments](https://docs.gitstream.cm/automations/standard/review-todo-comments/)

[Request screenshot](https://docs.gitstream.cm/automations/request-screenshot/)

[Enforce semantic PR titles](https://docs.gitstream.cm/automations/standard/enforce-pr-title/)

[Approve JavaScript formatting changes](https://docs.gitstream.cm/automations/languages/javascript/approve-javascript-formatting-change/)

[Knowledge share](https://docs.gitstream.cm/automations/standard/review-assignment/share-knowledge/)

[Review sensitive files](https://docs.gitstream.cm/automations/standard/review-assignment/review-sensitive-files/)

[Change deprecated components](https://docs.gitstream.cm/automations/change-deprecated-components/)

[Automatic Jira Status Updates](https://docs.gitstream.cm/automations/integrations/jira/jira-change-status/)

### Additional Resources

[Continuous Merge Guide to Merge Standards](https://linearb.io/resources/continuous-merge-white-paper)

[gitStream Workshop: Getting Started with Workflow Automations](https://www.youtube.com/watch?v=NLffo0FFSHU)

[Automate: Pre merge Workflow Automation for Dev Efficiency](https://www.youtube.com/watch?v=Mvw6UMumiTc)

[gitStream Workshop: How to Apply a Rule - Approving Safe Changes](https://www.youtube.com/watch?v=g%5Fh0W-CAs64)

[Cycle Time Breakdown: Tactics For Reducing PR Review Time](https://linearb.io/blog/reducing-pr-review-time)

[gitStream vs. Code Owners vs. GitHub Actions](https://linearb.io/blog/gitstream-vs-code-owners-vs-github-actions)

[Thank You CODEOWNERS, It's Time for Code Experts](https://linearb.io/blog/its-time-for-code-experts)

[gitStream: PR Review Workflows](https://docs.gitstream.cm/automations/standard/review-assignment/)

## Selective CI/CD

### What is selective CI/CD?

Selective CI/CD is the orchestration of CI/CD pipelines based on the contents of pull requests to maximize pipeline efficiency.

![gitStream automatically skipped production CI pipelines because this PR only contains docs changes.](https://assets.linearb.io/image/upload/c_fit,w_2560,h_1226/f_auto/q_auto/v1/skip-github-action_1_2?_a=BAVMn6ID0)

### Why should you use selective CI/CD?

Long CI/CD pipelines delay feedback loops and prevent merges for code that might otherwise be ready for production. Excessive CI/CD wait times negatively impact software delivery efficiency and developer experience, and skipping unnecessary pipelines is a simple method to realize immediate efficiency improvements and reduce infrastructure costs.

### How do you use selective CI/CD?

1. Identify sources of long CI/CD wait times and invest time into developer experience improvements that optimize delivery pipelines.
2. Use policy-as-code to automate standardized workflows for the merge process that set clear expectations for all participants about the end-to-end experience. Enforce code requirements without creating excessive operational overhead.
3. Use automation to ensure CI/CD pipelines are only activated when necessary to avoid unnecessary infrastructure costs and merge delays.

### SEI Automations

[Dispatch GitHub Actions](https://docs.gitstream.cm/automations/integrations/github-actions/dispatch-github-action/)

[Skip GitHub Actions](https://docs.gitstream.cm/automations/integrations/github-actions/skip-github-action/)

### Additional Resources

[Engineering Leader’s Guide to Programmable Workflows](https://linearb.io/resources/engineering-leader-guide-to-programmable-workflows)

[Build Intelligent CI Pipelines with gitStream CI Orchestration](https://linearb.io/blog/build-intelligent-ci-pipelines-gitstream-ci-orchestration)

[SEI Automations: GitHub Actions](https://docs.gitstream.cm/integrations/github-actions/)

## Label Tracking

### What is label tracking?

Label tracking automates PR labeling based on changes introduced in commits, enabling visualization of metrics associated with the label.

![Pickup Time showing Copilot vs baseline](https://assets.linearb.io/image/upload/c_fit,w_2560,h_2560/f_auto/q_auto/v1/Group_6917?_a=BAVMn6ID0)

### Why should you use label tracking?

Automatic label tracking enables you to track engineering initiatives, development challenges, and opportunities for improvement down to individual lines of code. Label tracking allows you to track the impact of new initiatives, like adopting generative AI, highlight potential problem areas in your codebase, and flag potential risk areas that need further analysis.

### How do you use label tracking?

1. Identify components, initiatives, or other functional areas you want to investigate deeper and automatically apply labels that flag these situations.
2. Monitor the rollout of new engineering initiatives by applying labels based on specific trigger conditions within your SDLC.
3. Build dashboards to visualize and track the impact of the labeled issues on your software delivery lifecycle.

### SEI Automations

[Automatically label Copilot-assisted PRs](https://docs.gitstream.cm/automations/integrations/copilot/flag-copilot-pr/)

[Label modified resources](https://docs.gitstream.cm/automations/standard/label-management/label-modified-resources/)

[Enforce required labels](https://docs.gitstream.cm/automations/standard/label-management/enforce-labels/)

[Label PRs by language](https://docs.gitstream.cm/automations/standard/label-management/label-prs-by-language/)

[Label PRs Without Tests](https://docs.gitstream.cm/automations/label-prs-without-tests/)

### Additional Resources

[SEI Integration: GitHub Copilot](https://docs.gitstream.cm/integrations/github-copilot/)

[How to Measure the Impact of Generative AI With LinearB](https://linearb.io/blog/measure-generative-ai-impact)

## SEI Automation Admin Console

### What is the SEI automation admin console?

The admin console lets you track workflow automation adoption across repos, teams, and your entire organization to track the impact on your software delivery pipeline.

![Automation Dashboard overview](https://assets.linearb.io/image/upload/c_fit,w_2560,h_1611/f_auto/q_auto/v1/Automation-adding_value_2?_a=BAVMn6ID0)

### Why should you use the SEI automation admin console?

Benchmarks help you quickly understand the health of your software delivery lifecycle relative to engineering teams at comparable companies. Every company and team is different, and while not every team performs the same, benchmarking gives you an idea of where you should first focus productivity efforts.

### How do you use the SEI automation admin console?

1. Get holistic visibility into your software delivery lifecycle to identify opportunities to automate standard processes and reduce inefficiencies in delivery pipelines. Simulate the impact of new workflow automations before adopting them to improve your development practices seamlessly.
2. Monitor productivity and efficiency metrics to measure the impact of rolling out SEI automations to your organization. Identify opportunities for continuous improvement and flag risk areas for further investigation.
3. Leverage data-backed insights to align productivity initiatives with strategic business goals and get buy-in from R&D stakeholders to continue increasing the breadth and depth of your productivity initiatives.

## Automatic Pull Request Labeling

### What is automatic pull request labeling?

Automatic pull request labeling is the process of automating the application of contextual labels to pull requests to reduce the cognitive load of code reviews. These labels are specific to the contents of each PR and are useful when viewing large lists of open PRs for review.

![Automatic Pull Request labelling](https://assets.linearb.io/image/upload/c_fit,w_2560,h_1896/f_auto/q_auto/v1/Unique_Context_for_every_PR?_a=BAVMn6ID0)

### Why should you use automatic pull request labeling?

Research shows that pull request reviews are [one of the most frequent sources of software delivery inefficiency](https://devinterrupted.substack.com/p/analysis-the-quickest-path-to-halving). Code reviews force developers into major context switches. One of the best ways to help them manage these switches is to provide more detailed and relevant context at the beginning of the review process.

PR labels are also an effective tool for enabling code reviewers to quickly filter out PRs containing problems your team needs to address before progressing through the review process.

### How do you use automatic pull request labeling?

1. Adopt general-purpose pull request labeling tactics that provide better context for code reviews across your organization. For example, labeling PRs with a review time estimate or based on the number of outstanding changes helps all code reviewers quickly deduce their status without clicking.
2. Identify common process failures and high-risk portions of your code base and use labels to indicate which PRs require corrective action. This ensures all code review participants are on the same page about outstanding issues without spending additional cycles uncovering everything.
3. Improve merge efficiency by using automatic PR labels to indicate which PRs are blocked. These include code that has completed the review process and is waiting for someone to merge it into production, PRs that only contain low-risk changes like documentation or tests, and any low-effort reviews that can be approved and merged quickly.

### SEI Automations

[Estimated time to review](https://docs.gitstream.cm/automations/provide-estimated-time-to-review/)

[Label unresolved review threads](https://docs.gitstream.cm/automations/standard/label-management/label-unresolved-threads/)

[Label missing Jira info](https://docs.gitstream.cm/automations/integrations/jira/label-missing-jira-info/)

[Label PRs without tests](https://docs.gitstream.cm/automations/label-prs-without-tests/)

[Label deleted files](https://docs.gitstream.cm/automations/label-deleted-files/)

[Label the number of approvals](https://docs.gitstream.cm/automations/standard/label-management/label-approvals/)

[PR label guidance](https://docs.gitstream.cm/automations/standard/label-management/suggest-labels/)

[Label SonarCloud quality report info](https://docs.gitstream.cm/automations/integrations/sonar/label-sonar/)

### Additional Resources

[Why Estimated Review Time Improves Pull Requests And Reduces Cycle Time](https://linearb.io/blog/why-estimated-review-time-improves-pull-requests-and-reduces-cycle-time)

[How to Add Estimated Review Time and Context Labels to Pull Requests](https://linearb.io/blog/how-to-add-estimated-review-time)

[SEI Label Management](https://docs.gitstream.cm/automations/standard/label-management/)

[Engineering Leader's Guide to Programmable Workflows](https://linearb.io/resources/engineering-leader-guide-to-programmable-workflows)

## Bot Assistant (WorkerB)

### What is WorkerB?

WorkerB is a bot assistant that helps your team stay on top of the collaborative side of the code review process. WorkerB notifies your teams about code reviews, makes it simple to auto-approve small changes, and helps developers identify opportunities to unblock their teams.

![WorkerB: A pull request took 23 days, A pull request was opened with 967 changes.](https://assets.linearb.io/image/upload/c_fit,w_2560,h_1870/f_auto/q_auto/v1/fd-pw-what-is-workerb?_a=BAVMn6ID0)

### Why should you use WorkerB?

Research shows that pull request reviews are . WorkerB keeps track of your team’s code review goals and automatically notifies developers when their attention is required to ensure work doesn’t fall through the cracks. Developers can also leverage chat commands to help plan and prioritize daily tasks to maximize time spent on productive work.

### How do you use WorkerB?

1. Create working agreements for code reviews on a team-by-team basis and use automatic WorkerB notifications to alert your team when PRs risk missing these goals.
2. Foster a culture of proactive collaboration where developers are encouraged to use WorkerB slash commands to identify reviews they can support.
3. Adjust goals as needed to create a culture of shared accountability where every developer plays a role in defining and maintaining productivity goals.

### Additional Resources

[Scaling Developer Efficiency: How to Do More with Less](https://linearb.io/blog/scaling-developer-efficiency)

[The Ultimate Guide to Team Working Agreements](https://linearb.io/blog/team-working-agreements)

[How to Achieve Predictable Software Delivery at Scale](https://devinterrupted.substack.com/p/how-to-achieve-predictable-software)

[Modern Practices for Goal Setting in Software Engineering](https://www.youtube.com/watch?v=U1sdptHx6mo)

[Scaling Developer Efficiency: Using metrics & automation to execute R&D strategy in a down market](https://www.youtube.com/watch?v=O-wpLDnMpX0)

[How do I use WorkerB Slash Commands?](https://linearb.helpdocs.io/article/ki5khxckec-how-to-use-slack-commands)

[WorkerB Inline Approval](https://linearb.helpdocs.io/article/iplti0ts1j-worker-b-inline-approval)

[WorkerB Sharing Unassigned PRs](https://linearb.helpdocs.io/article/2n2ohnx85s-worker-b-sharing-unassigned-prs)

[WorkerB Team Notifications](https://linearb.helpdocs.io/article/16zfs7qnli-notification-types)

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## Structured data

_Machine-readable metadata (JSON-LD) embedded in the page for search/AI context — not content rendered on the page itself._

```json
{
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  "@type": "Organization",
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  "url": "https://linearb.io",
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  "description": "LinearB is the engineering productivity platform that helps engineering leaders prove AI is improving throughput without sacrificing delivery confidence, flow efficiency, or developer experience.",
  "sameAs": [
    "https://www.linkedin.com/company/linearb"
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  "award": [
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      "dateAwarded": "2026",
      "awardedBy": {
        "@type": "Organization",
        "name": "Gartner®"
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    {
      "@type": "Award",
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      "@type": "Award",
      "name": "America's Best Startup Employers 2025",
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        "name": "Forbes Magazine"
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