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: 39.3%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 59 | 18.2% |
| GitHub Copilot | GitHub | 13 | 4% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
77be36eeFix nanoid range in yarn.lockClaude Code16fad4d3Bump docker/setup-qemu-action to v4.3.0Claude Code3fcff43dOpt individual packages out of the stricter presetsClaude Code260803cdUpdate .changeset/nice-jeans-sniff.mdGitHub Copilot56114881Potential fix for pull request findingGitHub Copilot113a5c57exclude minio.test.ts from jsdom testGitHub Copilot
What was excluded
| Commits in window | 661 |
| Merge commits removed | −283 |
| CI / dependency bots removed | −53 |
| Considered | 325 |
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 transloadit/uppy