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: 1.9%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 3 | 0.6% |
| Claude Code | Anthropic | 1 | 0.2% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
b9dee866refactor: style and align Install tab filter chips (#4848)GitHub Copilot543b8958Fix Actions script injection vulnerability in issue-slash-commands.yaml (#GitHub Copilot97d5f7b8feat: Add Brave debloat settings to tweaks.json (#4427)GitHub Copilot8d3adb59Replace the FOSS dot with a corner badge on app entries (#4924)Claude Code
What was excluded
| Commits in window | 558 |
| Merge commits removed | −6 |
| CI / dependency bots removed | −28 |
| Considered | 524 |
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 ChrisTitusTech/winutil