Adoption is broad. Many contributors are committing agent-authored work, which is what a real organisational rollout looks like.
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: 29.3%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 61 | 8.6% |
| Claude Code | Anthropic | 11 | 1.6% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
066b7fd3Profile Statistics more Consistent (#23150)GitHub Copilot67fb2097Add admin-managed password controls to the user admin panel (#23698)GitHub Copilotb89c97b5Require authentication for email display in API (#23696) (#23706)GitHub Copilot2ffcc682DEV-3974: document delegated bearer authentication (#23831)Claude Code3313ab2dDEV-3974: accept delegated bearer authentication (#23818)Claude Codeca21a8b5DEV-3974: add JWKS-backed delegated access verifier (#23830)Claude Code
What was excluded
| Commits in window | 733 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −25 |
| Considered | 708 |
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 forem/forem