Anthropic Killed Git at 30,000 Merges a Day

In May, Anthropic merged around 2,500 code changes per day. By September: over 30,000. Not a rounding error. Claude is writing most of it autonomously — research loops, services, micro-optimizations — and Git simply wasn't built for that.

The specific failure: Git's distributed design assumes clients that may be offline. Every Anthropic agent is online by definition. At peak they ran several hundred Git mirrors. The main branch history hit ~100 GB. CI was doing 25 million checkouts per day — naïve Git would have pushed 600 PB of daily traffic through the network.

So seven engineers built Scion — a server-centric, changeset-based replacement — and migrated the entire monorepo in five months. The new infrastructure footprint is 200x smaller on CPU and memory than the old Git mirroring setup.

The thing worth sitting with: coding is no longer Anthropic's bottleneck. Developer infrastructure is. That's the first time that sentence has been true in software history, and it won't stay Anthropic's problem alone for long.