Anthropic built its own source control system after daily code changes soared from 2,500 to over 30,000. A seven-person team created Scion and moved the company from Git in five months. The article also notes that AI code review can help, but engineers must guard against over-engineering.
ORIGINAL LINK: https://simonwillison.net/2026/Oct/13/redesigning-source-control-at-anthropic/
