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: 9.1%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 31 | 2% |
| Devin | Cognition | 3 | 0.2% |
| Cursor Agent | Anysphere | 1 | 0.1% |
| GitHub Copilot | GitHub | 1 | 0.1% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
f77ae687Fix standalone classify val crash on datasets with extra classes (#26182)Claude Codeee0913e3Preserve conf=0.0 in IMX export score_threshold (#26183)Claude Code9aa41d67Preserve an explicit data= override when resuming training (#26175)Claude Codea43384c8Fix stale package imports in Python subprocesses (#24447)Devin5eb325faClarify automatic dataset downloads in training docs (#24155)Devin8fc958edExclude `Sigmoid`/`Softmax` from TensorRT INT8 quantization (#25020)Devin8b673ce5Fix DDP deadlock for YOLO26x: re-add find_unused_parameters (#24620)Cursor Agent7ad68faeFix FP16 inference crash from TinyViT cached bias dtype mismatch (#23780)GitHub Copilot
What was excluded
| Commits in window | 1,541 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −21 |
| Considered | 1,520 |
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 ultralytics/ultralytics