Anthropic built custom version control to handle tenfold growth in merges

As Anthropic scaled, the number of merges per day grew more than tenfold, making standard source control a significant constraint on development speed. The company decided to migrate to an in-house version control system tailored to its needs rather than continue struggling with off-the-shelf tools.

The five-month migration project addressed the specific workflow and scale challenges Anthropic faced as its AI research and engineering teams grew. The move reflects how rapidly expanding AI labs must sometimes rethink foundational infrastructure to stay productive.