Anthropic Replaces Git with Custom VCS to Handle 30k Daily AI Agent Merges in 5-Month MigrationAnthropic AI (@AnthropicAI)T1Tools & Engineering

Anthropic AI (@AnthropicAI) · 10/14/2026, 00:36:41

Anthropic Builds Custom Version Control to Replace Git Amid 30K Daily Agent Merges

By Anthropic (@AnthropicAI)

78AI Score

Executive Summary

Anthropic's engineering team completed a full migration from Git to a custom version control system in five months to address infrastructure bottlenecks caused by AI agents. With daily code merges surging from 2,500 to over 30,000, traditional developer tools designed for human scale proved insufficient, necessitating a new system optimized for high-concurrency agent workflows.

SOURCE COVERAGEFull Original Report

Anthropic (@AnthropicAI) · 2026-10-13 16

New on our Engineering blog: Creating in-house source control.

In May, we merged around 2,500 code changes per day. In September, we merged more than 30,000 per day. As a result, we became bottlenecked by developer infrastructure built for human (rather than agent) scale.

Here, we share how we built a new version control system—and fully migrated our monorepo from git—in five months:

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