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Open Source Maintainer Finds 40% of Pull Requests Are AI-Generated Bots

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2mo ago· 3 min readenInsight

Summary

The maintainer of awesome-mcp-servers, a popular GitHub repository, describes how the volume of pull requests surged dramatically earlier this year, with quality declining as AI-generated bot submissions flooded in. By embedding a hidden prompt injection in CONTRIBUTING.md, the author discovered that approximately 40% of recent PRs were generated by AI bots, not humans. The article explores the growing problem of automated, low-quality contributions in open source communities.

Key quotes

· 3 pulled
Instead of a handful of quality PRs per day, the volume jumped to 20, 50, or more.
The descriptions had a templated, mechanical feel. And something subtler was missing: the excitement.
By embedding a hidden prompt injection in CONTRIBUTING.md, the author discovered that approximately 40% of recent PRs were generated by AI bots.
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How a hidden prompt injection in CONTRIBUTING.md revealed that 40% of pull requests to a popular GitHub repository were generated by AI bots

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