Adoption is broad. Many contributors are committing agent-authored work, which is what a real organisational rollout looks like.
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: 19.2%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 30 | 5.8% |
| GitHub Copilot | GitHub | 5 | 1% |
| Cursor Agent | Anysphere | 1 | 0.2% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
bdc96df2Bump lerna to 10.0.0 (#48904)Claude Code3c2c353f[test][tooltip] Keep the disabled trigger away from the real pointer (#489Claude Code29ca3b00[test] Fail the regression run when a webfont does not load (#48948)Claude Code1bae65f3[modal][dialog] Fix scrollbar compensation in Shadow DOM (#48826)GitHub Copilot7e487863Bump MUI infra packages (#48365)GitHub Copilot4d3b1b0e[tooltip] Simplify RTL styles using CSS logical properties (#48351)GitHub Copilot69dd1a27fix(infra): resolve Renovate dashboard warnings (#48700)Cursor Agent
What was excluded
| Commits in window | 760 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −241 |
| Considered | 519 |
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 mui/material-ui