Antique

Anthropic's engineering team built a new source control system, Scion, plus its code review tool Antique and half a dozen related systems, and fully migrated to them in five months with seven engineer…

Anthropic replaced git across its monorepo with an in-house version control system called Scion after daily code merges rose from about 2,500 in May to more than 30,000, much of it written by Claude. …

Anthropic built an in-house version control system called Scion and fully migrated its monorepo off git in five months, after its average merged code changes grew from about 2,500 per day in May 2026 …