New AI agent skill creates better diagrams by enforcing strict design rules

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A developer named Cathryn Lavery created an AI skill called 'diagram-design' to improve the visual quality of architecture diagrams generated by coding agents. The skill, which trended on GitHub, enforces a detailed style guide limiting elements like colors, shadows, and shapes. It works by providing rules and scripts to redraw diagrams from sources like Mermaid or draw.io into clean, single HTML files. The creator encourages users to adopt the underlying design principles, not just the code, for their own projects.

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