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: 36.1%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 397 | 27.8% |
| Claude Code | Anthropic | 24 | 1.7% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
aad07ef2Add FP8/FP4 block-quantized support to GatherBlockQuantized contrib op (#3GitHub Copilot84d758f8Suppress preload errors for optional CUDA libraries (#32112)GitHub Copilote8787e28Skip compiling Flash Attention .cu sources when onnxruntime_USE_FLASH_ATTEGitHub Copilot44100ea4Give the CUDA plugin build the CUDA 13 CCCL include path (#32392)Claude Code09f2e562Force fp32 fallback for CPU-assigned fp16 nodes with no matching kernel (#Claude Code15c25549Fix GCC 15 -Werror build warnings (#29679)Claude Code
What was excluded
| Commits in window | 1,479 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −51 |
| Considered | 1,428 |
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 microsoft/onnxruntime