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84.6%
of 104 commits were committed by an AI agent — a floor, not an estimate
84.6% agent · top contributor 17%26 contributors
org-wide

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

88
agent commits
16
human commits
26
agent contributors
17%
largest contributor

Assisted or autonomous

88assisted
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
Apr26
May26
Jun26
Jul26
Aug26
Sep26

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

Which agents

Claude CodeAnthropic8884.6%

Verify it yourself

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

  • a97b9a2dfeat(claude_agent_sdk): add scheduled repository reviewer recipe (#860)Claude Code
  • 26b5cdceRetire claude-opus-4-1 across cookbooks; align validator model mappings toClaude Code
  • bbfab1bbdocs(managed_agents): remove cost and latency ratios from CMA_plan_big_exeClaude Code

What was excluded

Commits in window140
Merge commits removed−36
CI / dependency bots removed−0
Considered104

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 anthropics/claude-cookbooks

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