WTF Is Going On(Weights, Tools & Frameworks)

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Simon Willison filed

Redesigning source control at Anthropic

read it at the source — Simon Willison →

Anthropic built a custom alternative to Git called Scion

What was said about it

466 points · 461 comments
Excuse me for throwing up this stupid idea, but if code changes per unit of time keep growing at this rate and are not slowing down with infinite merging demand, it seems that this repo will be in a constant state of continuous change and …
I don't get one thing, if agents are so great at developing software at massive scale, why wouldn't Anthropic, instead of just selling tokens to other companies to use its agents, let those agents develop highly profitable services for Ant…
What is are the benefits of supporting extremely high churn rate in version control? What is the code doing? What problems are being solved? Are changing requirements the driving factor, and if so, why are requirement changes accelerating?…
> As our monorepo grows, it increasingly doesn’t fit that design space. The history of our main branch alone is almost 100 GB The first thing that hits me is, did you consider not going all in on a monorepo? I know it has been the trend in…
> Earlier in the year, we had largely handwritten the first version of the git-to-Scion ingestion pipeline as a prototype. We thought it was good—until we got our hands on an early internal snapshot of Claude Mythos Preview. We asked it to…
I also found git checkouts to be a bottle neck but I didn’t want to change everything so I built git-dedup, it uses a global cache like pnpm so repeated checkouts are near instant.

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