Current outcome
Anthropic has migrated its main code repository off Git to Scion, its purpose-built server-side version control system. Scion supports over 30,000 daily merges and about 25 million CI checkouts, with much lower resource usage than the prior Git mirror architecture, and is accompanied by the Antique code review tool. Scion is not open-sourced and is aimed at very large repositories with many parallel coding agents.
Progress timeline
2 material updates- #01
Redesigning source control at Anthropic
Anthropic details its redesign of internal source control into a server-based VCS built to absorb roughly 30,000 merges per day and 25 million CI checkouts, arguing that latent demand for merging code is effectively infinite and every removed bottleneck only increases code production.
Source evidence: Philpax
- #02
Anthropic主仓库弃用Git：日合并突破3万次，7个人花5个月完成系统迁移
Added confirmation that Anthropic migrated its main repository off Git to the purpose-built VCS Scion, developed by 7 engineers over 5 months with Claude assistance, alongside a code review tool called Antique.
State after update: Anthropic has migrated its main code repository off Git to Scion, its purpose-built server-side version control system. Scion supports over 30,000 daily merges and about 25 million CI checkouts, with much lower resource usage than the prior Git mirror architecture, and is accompanied by the Antique code review tool. Scion is not open-sourced and is aimed at very large repositories with many parallel coding agents.
Source evidence: theblockbeats