TL;DR Claude generated so much code that Git itself became the bottleneck, so Anthropic rebuilt its source control system from scratch. A team of just 7 people pulled it off in 5 months. Title: Redesigning source control at Anthropic URL: Here are the key points. ・📈 Daily merges jumped more than 10x in 5 months, from about 2,500 to over 30,000 ・⚠️ Naively scaling the old Git setup would have meant 600PB of daily traffic ・🖥️ The new system, Scion, assumes clients are always online and pushes work to the server side ・🗂️ A lightweight Changeset data structure allows instant ingestion with no packfiles needed ・⚡ A 3-tier cache hits 99%+ at every layer, cutting checkouts from minutes to seconds ・💾 Infrastructure CPU and memory footprint dropped 200x, and CI CPU usage fell 25% ・🤖 Claude helps with design and code generation, and even acts as a dedicated "superfan" watching individual components What stands out is both the willingness to question Git's core assumptions and the speed of pulling off the rebuild with Claude in just 5 months. #Anthropic# #SoftwareEngineering#