Anthropic went from 2,500 to over 30,000 code changes a day in four months

On 13 October, Anthropic explained why it replaced git in its main repository with a system of its own: the volume overwhelmed it. It went from about 2,500 code changes merged a day in May 2026 to more than 30,000 in September. The repository's users are now mostly agents and automated jobs. The company says it uses Claude to write software far more than almost any other company, but gives no percentage.

According to the post, Claude can iterate on research tasks on its own and build entire services, but engineers often had to tell it no, because it sometimes broke core system constraints. Reviewers still look at every change, but now focus on its intent rather than on every line.