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: 9.1%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 5 | 2.6% |
| GitHub Copilot | GitHub | 2 | 1.1% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
0a660463fix(theme-common): make Details component react to external open attributeClaude Code545cff6drefactor: replace escape-string-regexp with native RegExp.escape (#12150)Claude Code29c3b5cefeat(core): Docusaurus Faster is stable + v4 future flag turns it on by deClaude Code9ba45592chore(deps): bump srcset from 4.0.0 to 5.0.3 (#12156)GitHub Copilotdb31c5b9fix(utils): Make execa usage consistent in git utils (#12028)GitHub Copilot
What was excluded
| Commits in window | 285 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −96 |
| Considered | 189 |
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 facebook/docusaurus