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: 11.3%. Bars are scaled to that peak, not to 100%.
Which agents
| Cursor Agent | Anysphere | 33 | 2.8% |
| Claude Code | Anthropic | 14 | 1.2% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
a7a07541fix(memory): detect interior page corruption on open againCursor Agent19470e61fix(tests): stop two model cases depending on import order and a dropped mCursor Agent1d6c2649fix(tests): match the delegation guards to the current prompt wordingCursor Agentf6a2024dfeat(backup): include all agent workspacesClaude Codef634eeaetest(web): cover agent and project workspace routingClaude Codeff61bbfefeat(backup): include all agent workspacesClaude Code
What was excluded
| Commits in window | 1,415 |
| Merge commits removed | −256 |
| CI / dependency bots removed | −0 |
| Considered | 1,159 |
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 zhayujie/CowAgent