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: 50%. Bars are scaled to that peak, not to 100%.
Which agents
| Cursor Agent | Anysphere | 22 | 9.3% |
| Claude Code | Anthropic | 10 | 4.2% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
f731edfaBump version to 1.0.4Cursor Agentfe29f156Bump version to 1.0.3Cursor Agent2f05c9a4Bump version to 1.0.2Cursor Agentf6651973Add bash rules engine (Phase 2): allow/ask/deny + command parser + classifClaude Code3987842eAdd bash tool (Phase 1): human-gated shell with process-group tree-killClaude Code78546e64Add permission engine: generalize the tool approval gateClaude Code
What was excluded
| Commits in window | 252 |
| Merge commits removed | −15 |
| CI / dependency bots removed | −0 |
| Considered | 237 |
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 virattt/dexter