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: 23.1%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 33 | 4.1% |
| Cursor Agent | Anysphere | 4 | 0.5% |
| GitHub Copilot | GitHub | 1 | 0.1% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
bbc8d58cfeat(ui): 设置页按工具拆分，Codex 专属配置不再在 Grok 下露出Claude Code3c79d5eefix(ui): sponsor 去重按落地页判同一家；工具切换条移到侧栏Claude Code3c282262feat(ads): 置顶赞助位独立成 topAd 字段，不再从推荐池里取Claude Code30633e4efix: sanitize provider imports from URLs (#1418)Cursor Agentb74756b5fix: stop model whitelist patch from breaking workspace sidebarCursor Agent4c2319e4fix(manager): read coordination status from flattened command resultCursor Agente2c13599Potential fix for pull request findingGitHub Copilot
What was excluded
| Commits in window | 1,001 |
| Merge commits removed | −198 |
| CI / dependency bots removed | −0 |
| Considered | 803 |
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 BigPizzaV3/CodexPlusPlus