Adoption is broad. Many contributors are committing agent-authored work, which is what a real organisational rollout looks like.
Assisted or autonomous
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
Peak month: 34.5%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 126 | 14% |
| GitHub Copilot | GitHub | 1 | 0.1% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
18e2caa4fix: terminate immediately on asar integrity violation (#53433)Claude Code4b4fabecfix: backport Node.js cleanup hook fixes for node::ObjectWrap addons (#533Claude Codea5f39c43build: ignore submodule pointer changes when exporting patches (#53415)Claude Code6f286c36docs: use Chromium over Chrome (#52426)GitHub Copilot
What was excluded
| Commits in window | 1,020 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −117 |
| Considered | 903 |
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 electron/electron