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: 21.4%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 21 | 11.5% |
| Claude Code | Anthropic | 1 | 0.5% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
ed0ec1baEnable early .NET builds in APIScan (#27952)GitHub Copilotbe3fd7a0Correct New-TemporaryDirectory help URI (#27934)GitHub Copilot9f747070Use .NET SDK and NuGet feed early access for build, package and release piGitHub Copilot6f7ffc2aChange New-Guid to generate UUID v7 by default (#27033)Claude Code
What was excluded
| Commits in window | 200 |
| Merge commits removed | −3 |
| CI / dependency bots removed | −15 |
| Considered | 182 |
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 PowerShell/PowerShell