Blogsby GlyphNov 5
Inside GitHub’s new Git storage architecture
GitHub's new Git storage architecture is built so thousands of agents can push to a single repository at once. Here's how it works.
GitHub Engineering the engineering blog of GitHub: latest posts and feed
GitHub · Engineering blog · 3.9 a month · 16 posts since Jul 8, 2026
Oct 21
The bridge to agent-scale Git infrastructure
We moved a copy of 99.99999% of GitHub's repositories to Azure. Here's how per-reference quorums will bring over the rest, and how object storage lets reads scale independently.
Oct 15
Staying Evergreen: How we automated secure access and repo hygiene in a shared org
Put native GitHub features to work to review outside collaborator access and archive stale repositories.
Oct 14
From 2,500 requests to 24: Rebuilding star history without the stargazers
Our new repo star history API now provides trends without returning individual identities or requiring unbounded database work. These are the engineering tradeoffs we made.
Oct 6
Building Git infrastructure for agent-scale development
We're rebuilding GitHub's Git infrastructure while GitHub keeps running, creating a foundation for agent-scale software development.
Sep 25
Improving site performance by shipping more CSS
How we fully migrated github.com away from CSS-in-JS.
Sep 23
Rendering huge pull requests in the GitHub Copilot app
How we rebuilt the diff surface in the GitHub Copilot app to open a million-line pull request with hundreds of inline review comments.
Sep 2
How we make AI coding more cost efficient without sacrificing task quality
Why shorter outputs can cost more, and how GitHub Copilot reduces wasted work across the complete coding task.
Aug 24
Your alt text passes automated checks. That doesn’t mean it’s any good
We built a plugin for the GitHub Accessibility Scanner to make sure your alt text is actually accessible. Here's how it works.
Aug 10
Using the GitHub Copilot SDK for Java
Enterprise Java developers have a new superpower, drive GitHub Copilot from idiomatic Java code with annotations, virtual threads, and more.
Aug 4
Turn one giant AI-generated pull request to a reviewable stack
Instead of one huge, un-reviewable pull request, teach coding agents to decompose work into a clean, ordered stack with GitHub stacked pull requests.
Jul 31
Don’t stop early: Case-folding source code at memory speed
How a branch-free loop and byte-space arithmetic let GitHub case-fold every byte of code search at >45 GiB/s on a single core.
Jul 29
Tame Dependabot: Group your updates, slow the cadence, keep security fast
Dependabot keeps your dependencies current, but its defaults can flood your repository with pull requests. Here's how grouping updates, slowing the cadence, and keeping security fixes fast cut the noise on a Microsoft open source project.
Jul 17
The cost of saying yes has changed
The cost of writing code dropped; the cost of owning it didn't. A framework for deciding which changes are actually cheap in the AI era.
Jul 10
Better tools made Copilot code review worse. Here’s how we actually improved it
How migrating Copilot code review to shared Unix-style code exploration tools reduced review cost by reshaping agent workflows around pull request evidence.
Jul 8
Automating cross-repo documentation with GitHub Agentic Workflows
Explore how the Aspire team turns merged product changes into SME-reviewed docs pull requests, closing the gap between release and documentation.
About this blog
How GitHub is built and run: architecture, infrastructure and Copilot.
Posts per week, last 26 weeks
3.9 a month over the last six months (or since the feed's oldest post)
Posts by month
Writes about
AI and agents (5), Developer tools (5), Security (2) in the last six months.
History
Official checkSep 25
not reviewed to official: github.blog, linked from github.com