this post was submitted on 19 Dec 2025
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Machine-Written Pull Requests Contain 70% More BugsCodeRabbit analyzed 470 GitHub pull requests and found AI-generated code introduces more defects than human-written code across logic, security, maintainability and performance categories, with severity spiking higher as well. The use of AI code generation has expanded across the industry.

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[–] pageflight@piefed.social 1 points 3 hours ago

Most of the bugs that make it to production are where the code seems totally reasonable, but someone misunderstood how systems interact, or what really happens in a corner case. AI is great at making reasonable looking code. It's terrible at... understanding.

Me today: And make sure the tests pass. AI: Great, the test cases are all updated! Me: You didn't actually run then. AI: Perfect! You're absolutely right, I will run the tests now.