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 engine…
Architecture
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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. The post Buildi…
Improving site performance by shipping more CSS
A look at how a design system shipped major changes without breaking the world. The post Improving site performance by shipping more CSS appeared fi…
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. The post How we make AI coding more c…
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. The post Don’t s…
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 e…
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. Th…
From latency to instant: Modernizing GitHub Issues navigation performance
How the GitHub Issues team used client-side caching, smart prefetching, and service workers to make navigation feel instant. The post From latency t…