Anthropic replaced git because agents made code cheap

Anthropic's daily merges jumped from about 2,500 in May to over 30,000 in September, so a seven-person team built Scion, an in-house version control system, and migrated off git in five months. The server handles commits, merges and history through an API, and checkouts fetch only what a job reads, cutting infrastructure 200x. Why it matters: Once agents write the code, the bottleneck moves to the systems around it: source control, review, CI and merge queues. Engineers on the team now review intent rather than every line, and spend their time on design and telling Claude no. Anthropic expects other teams to hit these limits within 6 to 12 months.

Try this: Measure where your agent-written changes wait (review, CI, merge) and fix the slowest step before adding more agents.