How much of cs249r_book did AI write?

2.7%

AI signed 2.7% of the 22,351 commits of cs249r_book. Signed by Codex (410), Claude (180), Gemini (2), and Cursor (1).

Since its first commit, on September 6, 2023. Read on November 8, 2026, at commit de87c01. Read it as markdown

Who signed the commits

Commits per month

Each month's commits up to its last one, with those an AI signed. Merges don't count.

05,000Dec 2025: 518 commits, 12 signed by AIDec 2025Jan 2026: 926 commits, 19 signed by AIFeb 2026: 530 commits, 0 signed by AIMar 2026: 759 commits, 3 signed by AIApr 2026: 1,920 commits, 40 signed by AIMay 2026: 2,654 commits, 3 signed by AIMay 2026Jun 2026: 1,847 commits, 410 signed by AIJul 2026: 232 commits, 0 signed by AIAug 2026: 1,120 commits, 0 signed by AISep 2026: 2,673 commits, 20 signed by AIOct 2026: 2,157 commits, 2 signed by AINov 2026: 148 commits, 6 signed by AINov 2026
  • Signed by AI
  • People
The figures, month by month
MonthCommitsSigned by AIShare
Nov 202614864.1%
Oct 20262,15720.1%
Sep 20262,673200.7%
Aug 20261,12000%
Jul 202623200%
Jun 20261,84741022.2%
May 20262,65430.1%
Apr 20261,920402.1%
Mar 202675930.4%
Feb 202653000%
Jan 2026926192.1%
Dec 2025518122.3%
Nov 202520121%
Oct 2025295175.8%
Sep 20253615615.5%
Aug 202595800%
Jul 202566030.5%
Jun 202543300%
May 202514400%
Apr 202511800%
Mar 202546500%
Feb 202544300%
Jan 202531200%
Dec 202415300%

The last commits an AI signed

How we know

Every AI coding tool leaves its signature in the commits it makes: a Co-Authored-By line, its own author name, or the merge of its branch. SeeRepo reads those signatures in the repo's history; a commit without one counts as made by people, and merges don't count.

Every AI tool SeeRepo recognizes →

Frequently asked questions

Which AI tool signed the most commits in cs249r_book?
Codex, with 410 of the 22,351 commits of cs249r_book.
Since when does AI sign commits in cs249r_book?
Since July 2025: the first month an AI tool signed a commit of cs249r_book.
How many commits does cs249r_book have?
cs249r_book has 22,351 commits since September 6, 2023. Merges don’t count.

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