How Anthropic Redesigned Source Control

To address severe infrastructure bottlenecks caused by rapidly growing code generation from AI agents, Anthropic built Scion, a client-server source control system designed for massive monorepos. Scion shifts repository operations such as history queries, diff calculations, and merges to the server, while utilizing immutable content-addressed objects and a multi-layered caching architecture to scale efficiently across millions of automated daily checkouts. Open article →