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: 1.9%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 9 | 0.4% |
| Cursor Agent | Anysphere | 5 | 0.2% |
| Claude Code | Anthropic | 2 | 0.1% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
c7b4ee8fREADME.md: clear statement wrt performances (#14345)GitHub Copilot2c9a6666fix lazy error locale loadingGitHub Copilot23c9f21efix caret diagnostics for cut and head argument formsGitHub Copilotb6810b46stdbuf: link cargo issue tracking cdylib install supportCursor Agentb96a00f5stdbuf: create embedded libstdbuf with mode 0600 on UnixCursor Agent3fb38a38stdbuf: create embedded tmpdir with 0700 at mkdir timeCursor Agent5633f03dpr: accept -e at the end of a short flag clusterClaude Code6e18efb2uucore: support realtime signals (RTMIN/RTMAX) in signal_by_name_or_valueClaude Code
What was excluded
| Commits in window | 2,562 |
| Merge commits removed | −39 |
| CI / dependency bots removed | −205 |
| Considered | 2,318 |
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 uutils/coreutils