Redesigning source control at Anthropic
Anthropic replaced Git with custom system Scion after AI agents drove 12x daily merge increase
“In May 2026, Anthropic averaged around 2,500 code changes merged per day; as of September, we merged over 30,000 per day.”
Anthropic's coding velocity increased 12x in four months—from 2,500 to 30,000 merged changes per day—likely driven by AI coding agents, forcing them to abandon Git and build a custom centralized source control system called Scion in five months. The scale required is staggering: a naive Git approach would have consumed over 600 PB of traffic per day. This is a leading indicator that AI-native engineering organizations will need fundamentally different infrastructure, not just faster versions of existing tools.