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: 3.2%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 18 | 0.6% |
| Claude Code | Anthropic | 4 | 0.1% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
5428bf4efix: preserve rule IDs when saving policy rules through the GUIGitHub Copilot9a89579eInitial planGitHub Copilot22ac711drefactor: tighten ws batch typing and queue cleanup loggingGitHub Copilotc19cb706fix(ci): harden app-readiness PID check; clarify version-source commentClaude Code938d7f14fix(ci): pin Node to 24.18.1 to match runtime; surface app startup logsClaude Codeb7081afffix: remove no-op autoFinalizeStatement wrapper and redundant busy_timeoutClaude Code
What was excluded
| Commits in window | 3,897 |
| Merge commits removed | −598 |
| CI / dependency bots removed | −98 |
| Considered | 3,201 |
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 fosrl/pangolin