I built Composer, which is a tool turns your ideas into architecture diagrams. You can also use MCP to turn your EXISTING codebase into a visual diagram!

It connects to all possible tools using MCP (Claude Code, Codex, OpenCode, etc.)

The goal was to make system design easier and to be able to draw out what I wanted to make before I started / to explain to others.

Its currently live at usecomposer.com and free!

I’d love feedback on whether it feels useful for real projects and where it breaks down. :) Thank you