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: 24%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 4 | 1.4% |
| Cursor Agent | Anysphere | 3 | 1% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
749b402afix: keep SPA internal target=_blank links inside the appClaude Codee43c082bchore: add use-pake skill documentationClaude Code66ae24b9fix: save right-click image/video downloads natively under strict CSPClaude Code6487c74cchore: bump version to 3.11.5Cursor Agente87bea44chore: optimization audit batch (ICO, BaseBuilder, CLI errors, CI lanes)Cursor Agent847154eefix: macOS --new-window crash and Rust panic safety (#1194)Cursor Agent
What was excluded
| Commits in window | 379 |
| Merge commits removed | −30 |
| CI / dependency bots removed | −57 |
| Considered | 292 |
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 tw93/Pake