53.8%

of 2,896 commits were committed by an AI agent — a floor, not an estimate

53.8% agent · top contributor 29.8%232 contributors

org-wide

Adoption is broad. Many contributors are committing agent-authored work, which is what a real organisational rollout looks like.

1,559

agent commits

1,337

human commits

232

agent contributors

29.8%

largest contributor

Assisted or autonomous

1547assisted

12autonomous

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

Apr26

May26

Jun26

Jul26

Aug26

Sep26

Peak month: 71%. Bars are scaled to that peak, not to 100%.

Which agents

GitHub Copilot	GitHub	1553	53.6%
Claude Code	Anthropic	4	0.1%
Devin	Cognition	3	0.1%

Verify it yourself

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

74c7d20aTrim excessive comments in src/frame/middleware (#63259)GitHub Copilot
e3034ac8Trim excessive comments in the rest of src/content-render (#63278)GitHub Copilot
20e9ba9eTrim excessive comments in src/article-api tests (#63280)GitHub Copilot
666fccbaSignal that the `copilot-setup-steps.yml` samples are illustrative (#45862Claude Code
1f077aa2Scope `push` to the default branch in copilot-setup-steps samples (#45823)Claude Code
dfd306e2Improve readability of lowest unmerged pull request condition in stacked PClaude Code
89b94425Patch release notes for GitHub Enterprise Server (#62578)Devin
29dd453cPatch release notes for GitHub Enterprise Server (#61095)Devin
c587f78ePatch release notes for GitHub Enterprise Server (#60602)Devin

What was excluded

Commits in window	3,764
Merge commits removed	−752
CI / dependency bots removed	−116
Considered	2,896

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 github/docs

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