A small group is using agents. Adoption has spread beyond one person but is not project-wide.
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: 60%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 15 | 8.1% |
| Claude Code | Anthropic | 1 | 0.5% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
1dbe6a77Integrate React Native 0.87.0-nightly-20260604-63683f091 (June 4th) (#1644GitHub Copilot6caef123Integrate React Native 0.87.0-nightly-20260519-58cd1bf58 (#16431)GitHub Copilot610892c7Make the PowerShell path lookup lazy again, to stop spamming errors on macGitHub Copilot0d0ef215Ignore fixed versions for dependabot (#16036)Claude Code
What was excluded
| Commits in window | 289 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −104 |
| Considered | 185 |
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/react-native-windows