Study says 16.9% of recent commits in high-star AI tool repositories carry AI signatures
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soufraz analyzed 324,088 commits across 52 high-star AI tool repositories on GitHub, saying the median repository had 16.9% of commits carrying AI signatures during its recent 180-day active period, with 85.3% of signed commits coming from Claude. The analysis defines "signature" as: across all history or the recent 180-day active period, at least 5% of commits carrying an AI co-author trailer, having an AI agent as author or committer, or carrying a "Generated with" footer. soufraz says that because Claude Code adds the trailer by default, tools with fewer signatures will be underestimated; all AI percentages are lower bounds, because agents can be configured not to sign, squash merges lose trailers, and autocompleted or pasted conversation output never signs. The self-reported results of the projects involved in the analysis were located and classified by soufraz, but not reproduced.
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- Hacker News AIHow much of GitHub's most-starred AI tooling is written by coding agents?
An analysis of 324,088 commits across 52 of GitHub's most-starred AI-tooling repositories found that the median repo had 16.9% AI-signed commits in its last 180 days of activity, with 21 of 52 at 25% or more, and that AI share showed no detectable link to stars (Spearman ρ = -0.05, p = 0.72). At day 180, these repos labeled 2.0 times as many commits as fixes (34.1% vs 17.3%), had lower churn (1.92x vs 3.77x) and kept more written code (67.1% vs 41.7%) than 12 pre-Copilot projects, but the gaps are concentrated in the 31 projects started in 2025 or later, so the sample cannot separate AI use from recency. Of 24 repos publishing a benchmark harness with committed results, 15 measure whether the tool does its job, and several publish numbers that went against them.
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