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: 42.9%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 78 | 19.3% |
| Claude Code | Anthropic | 12 | 3% |
| Cursor Agent | Anysphere | 1 | 0.2% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
2f0f3f17perf(reference): vectorize Resize axes path (#8415)GitHub Copilot95fd09bbrefactor(defs): centralize operator schema docs (#8390)GitHub Copiloteffa5672Fix GlobalMaxPool reference implementation for 3D inputs (#8383)GitHub Copilote5d9afe9Add move-taking overloads for Graph::addInitializer (#8367)Claude Code9849164aAdd BitShift-28 with signed integer type support (#8270)Claude Code2bcd4d5dAdd Einsum-28 with bfloat16 support (#8313)Claude Codede0b313aClean up reference evaluator tests (#7684)Cursor Agent
What was excluded
| Commits in window | 508 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −104 |
| Considered | 404 |
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 onnx/onnx