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  Learn about artificial intelligence and machine learning across the GitHub ecosystem and the wider industry.
  - Generative AI
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  - GitHub Copilot
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  - LLMs
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  - Machine learning
    Machine learning tips, tricks, and best practices.
- How AI code generation works
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  Learn more
Developer skills
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  - Application development
    Insights and best practices for building apps.
  - Career growth
    Tips & tricks to grow as a professional developer.
  - GitHub
    Improve how you use GitHub at work.
  - GitHub Education
    Learn how to move into your first professional role.
  - Programming languages & frameworks
    Stay current on what’s new (or new again).
- Get started with GitHub documentation
  Learn how to start building, shipping, and maintaining software with GitHub.
  Learn more
Engineering
- Engineering
  Get an inside look at how we’re building the home for all developers.
  - Architecture & optimization
    Discover how we deliver a performant and highly available experience across the GitHub platform.
  - Engineering principles
    Explore best practices for building software at scale with a majority remote team.
  - Infrastructure
    Get a glimpse at the technology underlying the world’s leading AI-powered developer platform.
  - Platform security
    Learn how we build security into everything we do across the developer lifecycle.
  - User experience
    Find out what goes into making GitHub the home for all developers.
- How we use GitHub to be more productive, collaborative, and secure
  Our engineering and security teams do some incredible work. Let’s take a look at how we use GitHub to be more productive, build collaboratively, and shift security left.
  Learn more
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  - Automation
    Automating your way to faster and more secure ships.
  - CI/CD
    Guides on continuous integration and delivery.
  - Collaboration
    Tips, tools, and tricks to improve developer collaboration.
  - DevOps
    DevOps resources for enterprise engineering teams.
  - DevSecOps
    How to integrate security into the SDLC.
  - Governance & compliance
    Ensuring your builds stay clean.
- How enterprise engineering teams can successfully adopt AI
  Learn how to bring AI to your engineering teams and maximize the value that you get from it.
  Learn more
News & insights
- News & insights
  Keep up with what’s new and notable from inside GitHub.
  - Company news
    An inside look at news and product updates from GitHub.
  - Product
    The latest on GitHub’s platform, products, and tools.
  - Octoverse
    Insights into the state of open source on GitHub.
  - Policy
    The latest policy and regulatory changes in software.
  - Research
    Data-driven insights around the developer ecosystem.
  - The library
    Older news and updates from GitHub.
- Unlocking the power of unstructured data with RAG
  Learn how to use retrieval-augmented generation (RAG) to capture more insights.
  Learn more
Open Source
- Open Source
  Everything open source on GitHub.
  - Git
    The latest Git updates.
  - Maintainers
    Spotlighting open source maintainers.
  - Social impact
    How open source is driving positive change.
  - Gaming
    Explore open source games on GitHub.
- An introduction to innersource
  Organizations worldwide are incorporating open source methodologies into the way they build and ship their own software.
  Learn more
Security
- Security
  Stay up to date on everything security.
  - Application security
    Application security, explained.
  - Supply chain security
    Demystifying supply chain security.
  - Vulnerability research
    Updates from the GitHub Security Lab.
  - Web application security
    Helpful tips on securing web applications.
- The enterprise guide to AI-powered DevSecOps
  Learn about core challenges in DevSecOps, and how you can start addressing them with AI and automation.
  Learn more

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Home / 07/2019

07/2019

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Automatically delete head branches of pull requests

Repositories can now be set to delete the head branch of a pull request once it has merged into the base branch. Learn more about automatic deletion of branches on…

An illustration of two octocats repairing a robot.

Multi-line diff selection

You can now select multiple lines in a diff view and link to the lines selected. Previously, multi-line selection only worked when viewing a file.

An illustration of two octocats repairing a robot.

Web notification retention policy changes

The retention policy for web notifications will be updated in multiple phases with the goal of retaining all `read` and `unread` messages for a total of three months each. The…

An illustration of two octocats repairing a robot.

Jump to definition in public repositories now supports PHP

Jump to definition is available for a subset of public repositories–supported in Go, JavaScript, Python, Ruby, Typescript, and now PHP. Learn more about jump to definition Check out the semantic…

An illustration of two octocats repairing a robot.

GitHub Desktop branch pruning

GitHub Desktop 2.1 removes unused branches from your local repository after they’ve been merged and deleted on GitHub.com to help keep your branch list relevant and uncluttered. View the full…

An illustration of two octocats repairing a robot.

Verified devices

For users without two-factor authentication enabled, GitHub now requires additional verification when you first sign in from an unrecognized device. After providing your username and password, you will be asked to…

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