# tinyhumansai/openscion

> A server-centric source control system for very large monorepos where most clients are AI agents and CI jobs rather than people. Implements Anthropic's Scion approach: server-side operations, changesets instead of snapshots, content addressing, and an API instead of checkouts.

- Magnitude: 2.0 out of 10 — Cooling
- Stars: 93 total · +2 stars measured 2026-10-18, 00:24–11:49 UTC, ≈ 5 by evening
- Star trust: star growth looks organic
- Category: Developer tools · Language: Rust · License: GPL-3.0 · Created: 2026-10-13 · Last push: 2026-10-13
- GitHub: https://github.com/tinyhumansai/openscion · Homepage: https://www.anthropic.com/engineering/redesigning-source-control · Page: https://gitnova.dev/en/r/tinyhumansai/openscion

## Useful for

- Deploy openscion-server and import a monorepo via opnscn import
- Benchmark OpenScion against git on synthetic repos with openscion-bench
- Clone a single directory of a monorepo using opnscn clone --path

## Why it’s here

- Star-counter measurements on 2026-10-18 (UTC), 00:24–11:49: 91 → 93 stars (+2). This is the change over that interval.
- Estimated end-of-day forecast: about +5 stars, using observed gains and the previous day.
- The repository is 5 days old and already has 93 stars. With less than two weeks of history, there's no usual pace to compare the spike against yet.
- Hacker News: “Redesigning source control at Anthropic” — 892 points, 4 days ago.

## Star trust

Star growth looks organic.

Star-trust labels are heuristics based on the repository’s behavior, not a check of every stargazer.

## Numbers

- Forks: 13
- Issues and pull requests: 15
- Watchers: 0
- Average over the last week: 16 per day
- Usual pace: too little history (under two weeks)
- Stars in the last hour (measured): 0

## Stars per day, last 6 days (oldest → newest, today is partial)

2026-10-13 … 2026-10-18: 17, 30, 24, 15, 7, 2

## Magnitude by day, last 2 days

10-17 3.1, 10-18 2.2

## Hacker News

- Redesigning source control at Anthropic — 892 points, 1010 comments: https://news.ycombinator.com/item?id=50073633
- Open source Scion – Anthropic's Git alternative in open source — 7 points, 0 comments: https://news.ycombinator.com/item?id=50079329

## Similar by description

1. **CarterT27/scion** — 1.1 · Cooling · Developer tools · Rust · +0 stars measured 2026-10-18, 00:25–11:52 UTC, ≈ 2 by evening
   An independent Rust implementation of a version control system inspired by Anthropic's design: history and expensive operations on the server, sparse checkouts, and commits written through APIs with no separate push. Aimed at…
   Full card: https://gitnova.dev/en/r/CarterT27/scion.md
2. **feder-cr/git-ai** — 3.1 · Cooling · Developer tools · Go · +26 stars measured 2026-10-18, 00:22–11:47 UTC, ≈ 58 by evening · unusual star pattern (heuristic)
   An open-source implementation of a server-centric version control system designed for coding agents: always-online clients, server-side history and search, and compare-and-swap landing without a merge queue.
   Full card: https://gitnova.dev/en/r/feder-cr/git-ai.md

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Magnitude (0–10) measures how fast and how unusually interest in a repository is growing right now. It is not a quality score.
Days are UTC. “So far today” is a fact; “expected by the end of the day” is a forecast.
Summaries and use cases are written by an LLM (DeepSeek V4.1 Flash) from the README and may be inaccurate: verify specific claims (benchmarks, speed, hardware) in the repository itself.
Data as of 2026-10-18 11:55 UTC, updated every 30 minutes.