Anthropic Built Scion, Its Own Source Control System, as Merged Changes Grew 12x to 30,000/Day
Pavan_Belagatti · x · 2026-10-19
Anthropic reportedly built its own version control system, Scion, and moved its monorepo off Git because source control became an infrastructure bottleneck.
Key points:
- Daily merged changes reportedly grew from 2,500 in May to over 30,000 by September — roughly a twelvefold increase, driven by AI agents and CI jobs.
- The issue isn't that Git stopped being useful, but that maintaining and distributing repository state couldn't keep up with a highly automated workload of agents preparing workspaces, fetching files, and recording changes.
- Scion takes a different design: code stays on a server, clients retrieve only the files they need, and commits are created directly on the server without a separate push.
The author frames this as a workload-specific decision, not a verdict against Git — systems built for distributed human collaboration carry avoidable overhead when the majority of consumers are machines.
Related event: Anthropic builds Git replacement Scion as monorepo merges soar 12x(2 posts)→
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