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: 4.5%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 14 | 1.5% |
| GitHub Copilot | GitHub | 7 | 0.7% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
af0b283dfix(generate-code): generate code cookie header deduplication (#9159)Claude Code8b51a3a8fix(XmlPreview): improve XML parsing error handling and return structure (Claude Codeba97ddbafeat(variables): revamp the read-only Variables tab (#8784)Claude Codeff2f2d08feat(description): file binary description implementation (#8434)GitHub Copilotd8fb7c7eai: coding standards for e2e tests (#7973)GitHub Copilot5e1a36f8fix: close previous SSE connection before sending new request (#7474)GitHub Copilot
What was excluded
| Commits in window | 990 |
| Merge commits removed | −38 |
| CI / dependency bots removed | −1 |
| Considered | 951 |
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 usebruno/bruno