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: 23.8%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 7 | 6.5% |
| GitHub Copilot | GitHub | 1 | 0.9% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
138f6a41fix(release): add manual publish trigger, tolerate registry lag (#7982)Claude Code3def5292fix(release): verify published manifests, widen catalog: guard (#7980)Claude Codedd9219cefix(preview): preserve blob: image URLs when sanitizing preview HTML (#797Claude Code482aa6f0chore: add SECURITY.md (#7724)GitHub Copilot
What was excluded
| Commits in window | 152 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −45 |
| Considered | 107 |
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 decaporg/decap-cms