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: 14.8%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 14 | 3% |
| GitHub Copilot | GitHub | 6 | 1.3% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
baa9ba61fix: encode path params per RFC 3986 path-segment rules in href/generatePaClaude Codec487132adocs: add Hostinger as a hosting provider (#15268)Claude Codea08b55e9Add form submission regression test for %23-encoded dynamic route params (Claude Code521a0ae5Align Node type dependencies (#15090)GitHub Copilot74f84d75dev: make route module splitting default (#15086)GitHub Copilot2bd8b8fcfeat!: require Vite environment API (#15077)GitHub Copilot
What was excluded
| Commits in window | 517 |
| Merge commits removed | −43 |
| CI / dependency bots removed | −11 |
| Considered | 463 |
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 remix-run/react-router