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: 8.4%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 31 | 2.3% |
| GitHub Copilot | GitHub | 3 | 0.2% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
e7c0084bdaemon/graphdriver/btrfs: Set the subvolume root mode explicitlyClaude Codef3f81c25daemon/graphdriver/graphtest: Create layers with umask 0Claude Code4f69b464d/libn/networkdb: carry network attachments in bulk syncsClaude Code44e1ccd0client: add missing doc comments to config, secret, and node typesGitHub Copilot63fcb9ffclient: add missing doc comments to container copy typesGitHub Copilote0e4afd3client: add missing doc comments to image tag, build cancel, and info typeGitHub Copilot
What was excluded
| Commits in window | 2,233 |
| Merge commits removed | −913 |
| CI / dependency bots removed | −0 |
| Considered | 1,320 |
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 moby/moby