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: 60%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 35 | 8.8% |
| GitHub Copilot | GitHub | 20 | 5% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
6864be3aperf!: import only cheerio/slim in cheerio/http crawlers and utils (#4114)Claude Code3a2c2883feat: instrumentation based opentelemetry collection (#3361)Claude Codeb0e828aechore(deps): bump pnpm to 11.22.0 (#4050)Claude Codef673ca54chore: migrate v4 to pnpm 11 (#3645)GitHub Copilotcb1b9848feat: share `SessionPool` instance between crawlers (#3499)GitHub Copilota23e79bcfeat: lazy-initialize `SessionPool`, drop `SessionPool.open()` (#3513)GitHub Copilot
What was excluded
| Commits in window | 528 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −128 |
| Considered | 400 |
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 apify/crawlee