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: 63.6%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 283 | 34.4% |
| Claude Code | Anthropic | 61 | 7.4% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
9c20fbb9[Keyboard Manager] Search, filter and bulk-delete for the remapping list (GitHub Copilot2386654a[UITests] Test framework windows management improvements (#50343)GitHub Copilot430b2a8dfix(ci): restore AI issue triage workflow (#50320)GitHub Copilot479924d6[Keyboard Manager] Editor: identity-based duplicate/conflict check in editClaude Code9c20fbb9[Keyboard Manager] Search, filter and bulk-delete for the remapping list (Claude Codefbf7cbd3ZoomIt: Fix silent recording audio on multichannel audio endpoints (#49400Claude Code
What was excluded
| Commits in window | 827 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −5 |
| Considered | 822 |
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/PowerToys