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: 42.8%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 363 | 16.2% |
| GitHub Copilot | GitHub | 12 | 0.5% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
84b632dbdocs(workflows): correct the durable-waits intro about who resumes a deadlClaude Code05240479ci(windows): route the requested-path runner through bunTestCommand tooClaude Code2945bbf1ci(windows): give the Windows leg an attributed per-test budget and warm uClaude Code671e2ee7Release 0.9.0 (#2568)GitHub Copilot1213b808Release 0.8.0 (#2502)GitHub Copilotc71f7f52Release 0.7.1 (#2435)GitHub Copilot
What was excluded
| Commits in window | 2,853 |
| Merge commits removed | −584 |
| CI / dependency bots removed | −23 |
| Considered | 2,246 |
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 coleam00/Archon