One person is driving this. The headline number reflects a single contributor's workflow, not a project-wide shift.
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: 33.3%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 14 | 3.4% |
| OpenAI Codex | OpenAI | 10 | 2.4% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
afafbe7ddocs: clarify suggest insert modeGitHub Copilot1321bc8brefactor: replace strip-ansi with util.stripVTControlCharactersGitHub Copilot9358684arefactor: replace uuid package with global crypto.randomUUIDGitHub Copilotcf1e7ea2fix(extension): escape installer buffer name (#5748)OpenAI Codex95d904a8fix(events): separate WinClosed and BufWinLeave (#5711)OpenAI Codex9d81c055fix(compat): optional opts argument on nvim 0.13+ (#5713)OpenAI Codex
What was excluded
| Commits in window | 418 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −8 |
| Considered | 410 |
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 neoclide/coc.nvim