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Anthropic replaces Git with its own Scion

Watching1 reports1 sourcesupdated 3 d ago

What happened

AI digest

Anthropic has published an article introducing Scion, its in-house code version control system built to replace Git. It says the reason for adopting its own system is that the rate of code changes rose sharply over the past six months: about 2,500 merges per day in May 2026, rising to more than 30,000 by September. So far the only public information comes from Anthropic's introductory article and Simon Willison's report, with no technical details, migration scope or timeline for Scion disclosed.

Written by AI from the reports · updated 3 h ago

LatestOct 14 07:00
Anthropic introduces Scion, its in-house version control system, saying it replaces Git after code change volume surged within six months.

Timeline

Follow the reports to see the event from each side.

Oct 14
  1. Simon Willison
    Redesigning source control at Anthropic

    Redesigning source control at Anthropic Interesting piece from Anthropic describing why and how they built their own custom alternative to Git, based on the dramatic increase in rate of changes to their code after the past six months. In May 2026, Anthropic averaged around 2,500 code changes merged per day; as of September, we merged over 30,000 per day.

Heat of this event

Not enough continuous observations yet to draw a trend.