A small group is using agents. Adoption has spread beyond one person but is not project-wide.
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: 30.5%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 66 | 18.5% |
| GitHub Copilot | GitHub | 2 | 0.6% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
7ec29c82fix(watch): interrupt stale rebuilds so watch convergesClaude Code68d9b510fix(display): reset the screen after degraded out-of-operation linesClaude Code1a3bb4f6refactor(display): address review feedback on the term rendererClaude Code46d75d0bUpdate .github/workflows/pr-review.ymlGitHub Copilotbd351d7fUpdate .github/workflows/pr-review.ymlGitHub Copilot
What was excluded
| Commits in window | 434 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −78 |
| Considered | 356 |
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 docker/compose