Hi, I'm Ran 👋

Self-taught programmer. 35+ years of production code. Still shipping.

I created 📈 yfinance and other open-source tools used by millions of developers — 30M+ downloads per month w/ 50K+ GitHub stars. I wrote 📚 Production-Grade Agentic AI, the handbook for autonomous systems that actually hold up in production.

These days I'm building 🧠 MUXI (open-source infrastructure for AI agents) and Cloop (autonomous engineering control plane), and running 🏢 Automaze (CTO-as-a-Service, 92% retention) and VarOps (systems-level advisory for companies building with AI).

I host 🎙️ Old School / New Tech and write 💌 Code Daddy — a newsletter for developers, indie makers, and solo entrepreneurs.

Popular projects

• 📈 yfinance (20M downloads/mo) - the most popular financial market data library
• 📊 quantstats - the #1 Python library for portfolio analytics
• 💻 ccpm - spec-driven development for AI agents
• 🛣️ vibeproxy - use your Claude / ChatGPT subscriptions with any coding agent
• 👻 muxi-ai - infrastructure for production-grade AI agents

Recent projects

• 💮 proof - visual proof of work for automated code changes
• 🔫 minigun - self-hosted email sender on top of Mailgun and Cloudflare
• 💬 imsg-relay - turn any Mac into a programmable iMessage gateway
• 📧 mailgent email infrastructure for AI agents
• 🐘 tiny - zero-config, batteries-included PHP framework