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21.3%
of 1,270 commits were committed by an AI agent — a floor, not an estimate
21.3% agent · top contributor 25.9%21 contributors
org-wide

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

270
agent commits
1,000
human commits
21
agent contributors
25.9%
largest contributor

Assisted or autonomous

266assisted
4autonomous

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: 38.8%. Bars are scaled to that peak, not to 100%.

Which agents

Claude CodeAnthropic22317.6%
Cursor AgentAnysphere413.2%
GitHub CopilotGitHub60.5%

Verify it yourself

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

  • 1cebd2a0fix(docs): give the usecase docs spec a timeout, and take in agentflowClaude Code
  • cbc686bfdocs: address the CodeRabbit and sisyphus-bot review on #8198Claude Code
  • 44f6596cdocs: show each diagram type drawn both waysClaude Code
  • b1a9d31cfix(e2e): only fail successful renders on XSS pageerrorsCursor Agent
  • 11f16d40fix(e2e): close XSS assertion gaps from reviewCursor Agent
  • c5dd3e5afix(e2e): assert Dirac line plot exists instead of visibleCursor Agent
  • 96a4e352Potential fix for pull request finding 'CodeQL / Incomplete string escapinGitHub Copilot
  • 34c8c1dcPotential fix for pull request findingGitHub Copilot
  • 4e8fee01revert: undo userDir rename, restore rawDir variable nameGitHub Copilot

What was excluded

Commits in window1,933
Merge commits removed−562
CI / dependency bots removed−101
Considered1,270

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 mermaid-js/mermaid

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