From Maintaining Open Source Libraries to Building an AI-Powered Tools OS with Rust and WebAssembly

Kitmul started as something far more modest than what it is today. I maintain two open source libraries: NextTranslate and Teaful. I needed a real Next.js project where I could iterate on them. Not artificial demos or example repositories; a live product where bugs surface naturally and limitations become obvious. That was the only goal. The AI multiplier effect To speed up development, I started using AI coding agents: Claude Code, Gemini, and Codex. Not just for productivity. I wanted to understand firsthand how these agents behave in a real development workflow. What they're good at, where they break, and how they change the way you think about building software. What I didn't expect was the effect on scope. When you can implement an idea in minutes instead of hours, you stop triaging ideas. You just build them. I went from "let me maintain these two libraries" to "let me build 300+ tools" in just 3 weeks. Currently I'm on Claude Code 20x. The combination of an agent that understand