Scion: 30,000 merges a day, git can't keep up
Anthropic's monorepo went from 2,500 to over 30,000 merges a day in four months, with nearly 100 GB of history. With Scion, the server handles commits and merges: a ref is a Spanner row advanced by compare-and-swap. Public test bench, 200 agents on one Mac: plain git 367.5 s, server-side merge 10.3 s, 36x faster.