Claude writes code too fast, and Anthropic can't keep up: even Git needs to be redone.

What happened: Anthropic released Scion, a source control system positioned against Git, and replaced Git with it in its monorepo. A 7 person team built Scion, code review tool Antique, and six related systems in 5 months. Key numbers: Daily merged changes rose from about 2,500 in May 2026 to over 30,000 in September, a 12x increase in 4 months. Why it matters: Anthropic says Git and human oriented infrastructure cannot handle agent driven load. Scion is not a general Git replacement and will not be released generally; it applies only to very large monorepos.

Anthropic released Scion, a source control system positioned against Git, and replaced Git with it in its monorepo. A 7 person team built Scion, code review tool Antique, and six related systems in 5 months.

Anthropic says Git and human oriented infrastructure cannot handle agent driven load. Scion is not a general Git replacement and will not be released generally; it applies only to very large monorepos.