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: 33.3%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 49 | 8.2% |
| GitHub Copilot | GitHub | 5 | 0.8% |
| Cursor Agent | Anysphere | 1 | 0.2% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
053c4319[code-infra] Compare the nightly React runs with the stable Argos build (#Claude Code62a348bf[test] Fix flaky DocSearch modal screenshots (#49122)Claude Code30b2aa74[test] Add a visual regression fixture for the DocSearch modal (#49002)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 | 898 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −304 |
| Considered | 594 |
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