Anthropic Replaced Git With an In-House Version Control System Built for Agentic Scale

Facing 30,000 daily merges, Anthropic built a proprietary VCS called Scion after Git buckled under its agent-driven development workflow.

Anthropic has quietly replaced Git internally with a homegrown version control system called Scion, according to @soluunj. The reported trigger: Git struggling to handle roughly 30,000 merges per day — a volume that reflects just how much of Anthropic's development is now driven by AI agents rather than humans typing by hand.

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