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: 11.4%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 8 | 3.4% |
| Claude Code | Anthropic | 5 | 2.2% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
7974eb7cFix incorrect Unicode escape decoding in QuotedStringTokenizer.unquote (#2GitHub Copilotd076aeb6Add abort support to FormChecker delayed checks (#26595)GitHub Copilot15f6915cRemove remaining detached-plugin bundling from jenkins.war (#27129)GitHub Copilot824ff91dRemove pre 2.0 detached plugins (#27098)Claude Codecac989e7[JENKINS-69789] Address review feedback for password complexity rule (#270Claude Code7fac9f8b[JENKINS-69789] Add password complexity rule extension point (#26774)Claude Code
What was excluded
| Commits in window | 716 |
| Merge commits removed | −3 |
| CI / dependency bots removed | −481 |
| Considered | 232 |
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 jenkinsci/jenkins