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: 84.3%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 282 | 70.7% |
| GitHub Copilot | GitHub | 7 | 1.8% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
70b17903fix: carry the pad deletion token across movePad (#7995) (#8089)Claude Code0eaae118fix: keep err.stack in sync when pad.check() adds context (#8138)Claude Code387651b6fix: copyPadWithoutHistory wrote an invalid changeset (#8140)Claude Codeb8a950eefix: delay anchor line scrolling until layout settles (#7544)GitHub Copilote58dfa47feat: add timeslider line numbers (#7542)GitHub Copilote0ccdb4dAdd creator-owned pad settings defaults (#7545)GitHub Copilot
What was excluded
| Commits in window | 756 |
| Merge commits removed | −22 |
| CI / dependency bots removed | −335 |
| Considered | 399 |
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 ether/etherpad