What 49 Vibe-Coded GitHub Projects Revealed About AI Code Duplication

I ran jscpd against 49 vibe-coded GitHub projects looking for code duplication patterns. Average duplication: 7.98% (above the 3-5% industry benchmark). But the unexpected finding wasn’t in the apps — it was in the skill libraries built to teach AI age…


This content originally appeared on HackerNoon and was authored by Andrey Kucherenko

I ran jscpd against 49 vibe-coded GitHub projects looking for code duplication patterns. Average duplication: 7.98% (above the 3-5% industry benchmark). But the unexpected finding wasn't in the apps — it was in the skill libraries built to teach AI agents how to code. Those have 30-40% duplication rates, mostly in markdown instructions and CSS templates duplicated for different agent platforms. The infrastructure designed to enforce AI discipline embodies the same pattern it's trying to prevent.


This content originally appeared on HackerNoon and was authored by Andrey Kucherenko


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Andrey Kucherenko | Sciencx (2026-05-23T17:59:59+00:00) What 49 Vibe-Coded GitHub Projects Revealed About AI Code Duplication. Retrieved from https://www.scien.cx/2026/05/23/what-49-vibe-coded-github-projects-revealed-about-ai-code-duplication/

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