An agentic skill for interactive C4 architecture diagrams

By Stephan in Feature on Sun 22 February 2026

I built a reusable agent skill that generates C4 PlantUML diagrams and a local interactive HTML explorer. It is a practical example of agentic AI doing something meaningful and low-risk: improving human understanding of software architecture.

Creating architecture diagrams with C4 and AI

By Stephan in Ai on Sat 18 January 2025

In this experiment I used AI to automate architecture documentation by testing Aider (an AI coding assistant). After just 5 minutes and 5 prompts, I generated a decent C4 diagram for a Streamlit web application. While not perfect, this experiment shows the promising future of AI-assisted documentation.