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Home › Engineering › Why Anthropic Replaced Git With Scion Engineering deep dive · Version control Why Anthropic Replaced Git With Scion: The Reasons, the Architecture, and What Every Developer Should Learn AI agents now write code faster than Git was built to move it. Here's the full story of why Anthropic built its own version control system, how Scion works layer by layer, and which ideas you can use in your own repo today. By Zubair Hussain , Full Stack Developer · October 19, 2026 · 14 min read Why Anthropic replaced Git with Scion Illustration: on the left, a tangled Git branch graph with many full repository copies. On the right, a calm tiered Scion architecture with one server, regional caches and many AI agents. ENGINEERING DEEP DIVE When agents outgrew Git Inside Anthropic's Scion version control system scion-server scion-cache scion-cache zubairhussain.xyz Git spreads the whole rep...

jev_quick_guide.txt ■■■ Jev System One model TypeSafe AI Jev by TypeSafe: 5 quick answers for developers TypeSafe AI launched Jev on September 15, 2026. It's a model built to make small decisions, and it never writes text back. I made a LinkedIn carousel about it, and these are the five questions I'd want answered first as a developer. The full guide with code and diagrams is on my portfolio . 70-500 ms response time $0.042 per 1M input tokens 193.6x faster on TypeSafe's tests Q1.exe ■■■ What does Jev give back? A typed answer, a probability for each allowed option, and a confidence value. There are three kinds of question: Choice: pick one from a list Score: rate on ordered levels Noul: probability of yes Ask "is this ticket urgent?" and a chat model writes you a paragraph. Jev returns something like {"urgent": "yes...