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: 5.2%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 9 | 1.4% |
| GitHub Copilot | GitHub | 3 | 0.5% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
4a42e580docs: align pre-submission checks with spotless/checkstyle in AGENTS.md anClaude Codeb3fd6634[ISSUE #15279]feat(lock): implement distributed reentrant/non-reentrant loClaude Codefd5114fd[ISSUE #15032] Fix TCP health-check channel leak and member IP prefix matcClaude Codeff5be200[ISSUE #15131] Use mvnd (Maven Daemon) in integration-test workflow (#1513GitHub Copilotd0408fe4Add code coverage badge to README (#14948)GitHub Copilot156c30f4Potential fix for pull request finding 'CodeQL / Workflow does not containGitHub Copilot
What was excluded
| Commits in window | 676 |
| Merge commits removed | −15 |
| CI / dependency bots removed | −4 |
| Considered | 657 |
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 alibaba/nacos