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: 24.1%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 10 | 5.3% |
| GitHub Copilot | GitHub | 9 | 4.8% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
1eacf6cbdocs(CSP): note that prefetch-src was removed from CSP Level 3 (#2327)Claude Codec1a874a1docs: state what verifies a self-made patch in Case 3 (#2360)Claude Codeb994fb66Vulnerable Dependency Management: add remediation and maintained backportsClaude Code8aaf426dRework the Java section of the XXE Prevention Cheat Sheet (#2405)GitHub Copilotdbf07c1bRemove dead CSRF community link from cheat sheet (#2418)GitHub Copilot86286859Fix terminology: behaviours -> behaviors in Authentication_Cheat_Sheet.md GitHub Copilot
What was excluded
| Commits in window | 229 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −40 |
| Considered | 189 |
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 OWASP/CheatSheetSeries