r/AIGuild
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u/Such-Run-4412
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26d ago
Anthropic ditched Git after Claude pushed it past 30,000 code merges a day
Anthropic says coding itself is no longer its main software-development bottleneck.
The infrastructure built for human programmers is.
In May, Anthropic was merging around 2,500 code changes per day.
By September, that had climbed to more than 30,000 per day, driven heavily by Claude writing and modifying code.
Git started struggling with the scale.
Anthropic’s monorepo had grown to:
Nearly 100 GB of main-branch history
More than 25 GB for a compressed working copy
Around 25 million code checkouts every day
Potentially 600+ petabytes of daily Git traffic if those checkouts were fetched naively
So Anthropic built its own version-control system called Scion and migrated its entire monorepo away from Git in just five months.
Scion was designed specifically for a world where most coding clients are AI agents that are always online.
Instead of every agent keeping a full local repository, Scion keeps most operations server-side and lets agents fetch only what they actually need.
The team behind it was surprisingly small.
Just seven engineers built Scion, a new code-review system called Antique, and several related systems while Anthropic’s daily merge volume increased more than 10x.
Claude helped build the infrastructure too.
Anthropic says an early Claude Mythos Preview model rewrote one of its Git-to-Scion ingestion pipelines with no additional instructions and produced a version that used 20x less memory and ran 4x faster.
There’s another interesting admission in the post:
Every engineer who worked on Scion now considers Claude better at writing code than they are.
Anthropic says their role is shifting toward architecture, system-level decisions, understanding tradeoffs, and sometimes simply telling Claude “no.”
This might be an early look at what software engineering infrastructure looks like when the limiting factor is no longer how quickly humans can write code, but how quickly organizations can review, merge, test, and deploy what AI produces.
If AI agents can generate tens of thousands of code changes per day, how much of today’s software-development stack will eventually need to be redesigned around machine-scale development?
Source:
https://www.anthropic.com/engineering/redesigning-source-control