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Andrew Kelley Says He Can Spot LLM-Assisted PRs

·2026.05.01 06:24

Key point

Andrew Kelley said LLM-assisted PRs are easily distinguished from human mistakes.

Details

Zig creator Andrew Kelley said that although he hasn't caught every LLM-assisted PR that has come in over the past few months, human mistakes and LLM hallucinations are fundamentally different in nature, making them relatively easy to distinguish.

He said that for someone familiar with agentic coding, there's a digital smell that's immediately apparent to non-users, comparing it to how a non-smoker instantly notices when a smoker enters a room. The point isn't to ban the use of LLMs outright, but that the traces left by this approach and the resulting quality differences are hard to hide.

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