Developer Tools●Mid
Composer – Diagram Your Codebase with MCP
MCP wrapper around codebase diagramming when Mermaid and PlantUML already exist.
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olivergrabner
402mo ago
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Composer – AI architect / MCP for software architecture diagrams
by olivergrabner·Apr 3, 2026·8 points·10 comments
AI Analysis
●MidEye CandyShip It
Another AI diagram generator when Mermaid AI and Lucidchart already exist.
Strengths
- •MCP integration allows direct codebase connections to multiple AI tools.
- •Clean UI with phase-based generation shows thought process transparently.
- •Free tier removes barrier to entry for individual developers testing it out.
Weaknesses
- •AI-generated architecture diagrams is a crowded category with established players.
- •No evidence of novel diagramming approach beyond existing LLM visualization tools.
Category
Target Audience
Software architects and engineering teams documenting systems
Similar To
Mermaid AI · Lucidchart · Eraser.io
Post Description
Hi everyone!
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
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