Review economics

DietrichGebert/ponytail

Read from the 100 most recently merged pull requests ·

Pull requests with attributed agent authorship took only 0.1× the time to merge of the rest.

≥24%

Attributed

a floor

22

Attributed PRs

78

Other PRs

100

Read

Per pull requestAttributedRestRatio
Review rounds0.00.00.0×
Reviews submitted0.10.20.7×
Reverts0.00.00.0×
Time to merge14h4.4d0.1×

How this was measured

24% of merged commits carry agent attribution — a floor, not the share; tools that only complete code inline leave no commit trail, so the unattributed side includes AI-assisted work; 2 PRs came off an agent branch with no commit attribution, so the real share runs higher; reads 100 of 170 merged PRs — the rest have not been analyzed yet.

Detected: Claude Code, OpenAI Codex, Devin, Google Jules, GitHub Copilot coding agent.

“Attributed” means a commit carried an agent’s signature — a co-author trailer, an agent commit identity, or an agent bot account. Tools that only complete code inline leave no such mark, so the other column is “rest”, not “human-written”. Full method and its limits

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DietrichGebert/ponytail — the review cost of AI-authored code