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: 9.5%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 7 | 0.8% |
| GitHub Copilot | GitHub | 3 | 0.3% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
cbd862a9feat(css): add unusedSymbols, take out @charset, squeeze a grid's null celClaude Codeb6ccff12ci: narrow the Node 10 matrix and drop the last hot-case runtime skip (#21Claude Coded4876f56fix: skip anonymous default export `.name` fix-up when the property is nonClaude Code0711964bfix(html): derive inline `<style>` content span from all text children (#2GitHub Copilot224f3ee0feat(html): add module.parser.html.sources option (#21022)GitHub Copilotdbbee3d3docs(agents): require CLA-signed commit author and org PR template (#20858GitHub Copilot
What was excluded
| Commits in window | 1,032 |
| Merge commits removed | −2 |
| CI / dependency bots removed | −143 |
| Considered | 887 |
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 webpack/webpack