26.8%

of 3,046 commits were committed by an AI agent — a floor, not an estimate

26.8% agent · top contributor 67.1%89 contributors

team

A small group is using agents. Adoption has spread beyond one person but is not project-wide.

815

agent commits

2,231

human commits

agent contributors

67.1%

largest contributor

Assisted or autonomous

809assisted

6autonomous

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

Jan26

Feb26

Mar26

Apr26

May26

Jun26

Jul26

Aug26

Sep26

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

Which agents

Claude Code	Anthropic	765	25.1%
Gemini CLI	Google	19	0.6%
Cursor Agent	Anysphere	17	0.6%
GitHub Copilot	GitHub	13	0.4%
OpenAI Codex	OpenAI	7	0.2%
Devin	Cognition	1	0%

Verify it yourself

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

51b23350fix(pypi): lock tools whose injected dependencies need a newer Python (#13Claude Code
8160080fci: email on release-triggered workflow failures (#13248)Claude Code
237801f0ci(docs): stop mise-action shadowing the PAT with the installation token (Claude Code
b7080726registry: add imagemagick (aqua:ImageMagick/ImageMagick) (#10118)Gemini CLI
e001f418registry: add wasm-tools (aqua:bytecodealliance/wasm-tools) (#9596)Gemini CLI
32316b06registry: add `git-filter-repo` (#9550)Gemini CLI
6cd90570fix(nix): skip non-sandboxable tests (#12990)Cursor Agent
928e1455fix(nix): skip aube node-gyp bootstrap test in checkPhase (#12858)Cursor Agent
4dbcc708fix(npm): intercept aube node-gyp bootstrap trampoline (#12429)Cursor Agent
1275d831registry: add aspire (github:microsoft/aspire) (#10520)GitHub Copilot
70c2f0baci: build/publish snap package for arm64 (#9948)GitHub Copilot
57976d27feat(backend): support top-level aqua cosign verification (#9111)GitHub Copilot
3bd5ce97fix(brew-cask): recognize Homebrew-owned casks (#12346)OpenAI Codex
059d1b83fix(brew-cask): harden direct cask pours (#11215)OpenAI Codex
0e0149f5fix(brew-cask): case-insensitive app lookup + preflight-generated wrappersOpenAI Codex
b65d93d0docs(css): align social links icons vertically center (#10424)Devin

What was excluded

Commits in window	3,462
Merge commits removed	−2
CI / dependency bots removed	−414
Considered	3,046

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 jdx/mise

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