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: 37.5%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 272 | 8.8% |
| Cursor Agent | Anysphere | 48 | 1.5% |
| GitHub Copilot | GitHub | 1 | 0% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
2f42a3e1backup: add besteffort-forbid-skip datadriven commandClaude Codeec4917d3backup: force compaction lock cleanup to run in datadriven testClaude Code84864bbebackup: fix async pausepoint handling in compaction lock cleanup testClaude Code80ca6706kv/kvserver/allocator: balance CPU on utilizationCursor Agent3f07217dkvserver: add merge evaluation and application to replica lifecycle testCursor Agent143985f0batcheval: export mergeTrigger for testingCursor Agentb008cc81Update CLAUDE.mdGitHub Copilot
What was excluded
| Commits in window | 5,331 |
| Merge commits removed | −2,218 |
| CI / dependency bots removed | −14 |
| Considered | 3,099 |
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 cockroachdb/cockroach