Ruby on Rails developer at Renuo, based in Zürich 🇨🇭. I build web applications, AI agents and developer tools, mostly in Ruby.
| Project | What it does |
|---|---|
| 📈 fundamentalista | Fundamental analysis of listed companies: ratios, Piotroski, Altman and Beneish scores, DCF valuation. |
| 💬 ruby_llm-ai_sdk | Stream RubyLLM chats to the AI SDK useChat hook, with tool calls and human approvals. |
| 🧪 minitest-impact | Pick the Minitest tests a change is most likely to break. |
| 📞 claude-center | A call center for AI coding agents. When one gets stuck, your phone rings. |
✍️ costanzo.blog · ✉️ dev.bcostanzo@gmail.com




