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64.8%
of 403 commits were committed by an AI agent — a floor, not an estimate
64.8% agent · top contributor 97.7%2 contributors
individual

One person is driving this. The headline number reflects a single contributor's workflow, not a project-wide shift.

261
agent commits
142
human commits
2
agent contributors
97.7%
largest contributor

Assisted or autonomous

261assisted
0autonomous

Assisted — a developer’s identity authored the commit and the agent added itself as co-author. The agent ran git commit during a working session, with a person there. Autonomous — a bot identity is the author, no human in the loop. Across the whole index, 93.7% of agent commits are assisted.

Agent share by month

Feb26
Mar26
May26
Jun26
Jul26
Aug26

Peak month: 73.3%. Bars are scaled to that peak, not to 100%.

Which agents

Claude CodeAnthropic26164.8%

Verify it yourself

Sample commits that matched. Every one links to GitHub — check the trailers.

  • e6728017Log every message an agent sends, and which way in it cameClaude Code
  • b74ce5b5Open a call from under its row, and keep the tool's name in what it sentClaude Code
  • 9081eb84Keep what an agent sent and read back, and unfold a call onto itClaude Code

What was excluded

Commits in window529
Merge commits removed−126
CI / dependency bots removed−0
Considered403

Bots are excluded from the denominator entirely. Counting dependabot as “AI-written code” is the fastest way to produce a meaningless number.

How this was measured

Measured over February–August 2026, cloned directly. Detection is deterministic string matching against signatures agents write about themselves — no heuristics, no style analysis. Merge commits and CI bots are excluded from the denominator. The figure is a floor: squash merges strip trailers, so real usage is higher. Contributor counts are aggregate — no individual is named.

Run it yourself: npx qmmit-cli square/leakcanary

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