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: 86.2%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 120 | 36.3% |
| GitHub Copilot | GitHub | 2 | 0.6% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
cebd8b20ci(release): widen the lock-sync retry window for PyPI propagation (#2716)Claude Code20476c0cdocs: enlarge README banner type for GitHub column widthClaude Code283a37cfdocs: rewrite README around a single conversion path and clear CTAsClaude Code8b8a1a3cfeat(core): import wren-engine into core/ (#2209)GitHub Copilotad609752doc: update READMEGitHub Copilot
What was excluded
| Commits in window | 388 |
| Merge commits removed | −2 |
| CI / dependency bots removed | −55 |
| Considered | 331 |
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 Canner/WrenAI