Anthropic built Scion, a custom source control system replacing Git, to handle a 12x surge in daily code merges from 2,500 to 30,000. The centralized system handles 25 million checkouts daily and an almost 100 GB main branch history, with migration completed in five months by a seven-person team.
Background
Anthropic has been scaling its AI development rapidly, with the introduction of Fable/Mythos class models driving dramatic increases in coding velocity throughout 2026.
- Source
- Simon Willison
- Published
- Oct 14, 2026 at 07:00 AM
- Score
- 7.0 / 10