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: 58.6%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 310 | 28.9% |
| Claude Code | Anthropic | 14 | 1.3% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
f056c4a5Add mesh blending post process (#18915)GitHub Copilotb2f90d3dAdd Inspector Lite text and sprite layer support (#18905)GitHub Copilot5486b4f3Improve Gaussian splatting coarse-first streaming and local-space culling GitHub Copilot9633edceFBX loader: full format coverage, animation fidelity, DCC materials, NURBSClaude Code92fe6595WebGPU: key the leftover uniform buffer slots on the draw context, not on Claude Code761bad3aGPU particles: re-bake gradient lookup textures in place for value edits (Claude Code
What was excluded
| Commits in window | 1,088 |
| Merge commits removed | −10 |
| CI / dependency bots removed | −4 |
| Considered | 1,074 |
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 BabylonJS/Babylon.js