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: 15.6%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 36 | 8.1% |
| GitHub Copilot | GitHub | 3 | 0.7% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
7ada3384feat(docs): add AI Gateway app attribution headers (#1305)Claude Code2164e71cfix: use custom viewport dimensions in streaming frame metadata and image Claude Code9f8e518afeat: reuse Chrome profile login state via --profile <name> (#1131)Claude Code90050f29chore: prepare 0.27.1 release (#1405)GitHub Copilotb5b84051fix: `state show` always fails with "Missing 'path' parameter" (#994)GitHub Copilotd441843cfix(#469): deduplicate cursor-interactive elements in snapshot -C (#475)GitHub Copilot
What was excluded
| Commits in window | 502 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −58 |
| Considered | 444 |
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 vercel-labs/agent-browser