Engineering

Over the course of a year, GitHub’s engineers make millions of commits across all of our internal repositories, process billions of API requests, and run tens of thousands of deployments across the internal apps that power GitHub’s services. We use many of GitHub’s products and plenty of other open source tools to operate at this scale. Here’s an inside look into how we do it.

Engineering

How we use GitHub Actions to manage GitHub Docs

👋 Hello from the GitHub Docs team! We build everything you see at docs.github.com. Over the past year, we’ve written a bunch of GitHub Actions workflows to do some fun…

Engineering

How we ship code faster and safer with feature flags

At GitHub, we’re continually working to improve existing features and shipping new ones all the time. From our launch of GitHub Discussions to the release of manual approvals for GitHub…

Engineering

Behind GitHub’s new authentication token formats

We’re excited to share a deep dive into how our new authentication token formats are built and how these improvements are keeping your tokens more secure. As we continue to…

Engineering

How we scaled the GitHub API with a sharded, replicated rate limiter in Redis

About a year ago, we migrated an old rate limiter in order to serve more traffic and accommodate a more resilient platform architecture. We adopted a replicated Redis backend with…

Architecture & optimization

How GitHub Actions renders large-scale logs

Rendering logs in a web UI might seem simple: they are just lines of plain text. However, there are a lot of additional features that make them more useful to…

Engineering

Scripting with GitHub CLI

It has been a year since we’ve launched the first public release of GitHub CLI. Since, we have added functionality to manage your repositories, comment on issues, enable auto-merge for…

Engineering

How we illustrate at GitHub

In the fourth installment of our five-part series on building GitHub’s new homepage, we’ll explore the artistic pipeline at GitHub to explain story, character and color, and to show how…

Engineering

Making GitHub’s new homepage fast and performant

This post is the third installment of our five-part series on building GitHub’s new homepage: How our globe is built How we collect and use the data behind the globe…

Engineering

Building On-Call Culture at GitHub

GitHub’s engineering group moved from a monolithic, hero-based on-call rotation to a more balanced on-call culture in order to increase our on-call expertise and improve the experience for our customers.

Engineering

Visualizing GitHub’s global community

This is the second post in a series about how we built our new homepage. How our globe is built How we collect and use the data behind the globe…

Engineering

How we built the GitHub globe

GitHub is where the world builds software. More than 56 million developers around the world build and work together on GitHub. With our new homepage, we wanted to show how…

Engineering

Reducing flaky builds by 18x

Part of the Building GitHub blog series. It’s four o’clock in the afternoon as you push the last tweak to your branch. Your teammate already reviewed and approved your pull request…

Engineering

Improving the GHES release process: release candidates

In our ongoing “Building GitHub” series, we talk about some of the projects we’re working on to improve how efficiently we build GitHub, as well as increase GitHub’s availability, stability,…