Anthropic has introduced an in-house source-control system through its Engineering blog, claiming that its existing developer infrastructure could no longer keep pace with the company’s growing volume of agent-related code changes.
The company reports that its monorepo handled around 2,500 merged changes per day in May 2026. By September, that figure had risen above 30,000 per day. A recorded peak reached 30,401 merged changes on September 9.
Anthropic attributes the bottleneck to infrastructure designed for “human” rather than “agent” scale. The company claims it built a new version-control system and fully migrated its monorepo from Git within five months.
A chart covering January through September tracks merged activity using a seven-day average. It separates changes into “Pull requests” and “Antique change requests,” and marks a low-activity stretch in late July and early August as “Quiet week.” Activity then rises sharply through August and early September.
The figures describe a significant increase in repository activity, though they do not establish how the changes were reviewed or how much work each change represented. That distinction prompted skepticism on X, where one reply questioned whether anyone could read 30,000 diffs per day. Another joked about a pull request that had remained open since March to fix a README typo.
Anthropic’s announcement focuses on the infrastructure required to process the increased volume. The company has not presented the new system as a general replacement for Git; its stated use in the announcement is the company’s own monorepo.
Source: Anthropic on X
