A small group is using agents. Adoption has spread beyond one person but is not project-wide.
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: 35.8%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 440 | 30.3% |
| Cursor Agent | Anysphere | 1 | 0.1% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
fc6e7bbeengines: publish the lazy HITS table under a lock (the parallel warmstart Claude Code9d86d9b3test(v4): make the ExpertStore knobs reach getenv() on WindowsClaude Codede5886a8test(v4): make the expert-store registry test build on WindowsClaude Code033df1afApply the implicit GLM stop sequences on /v1/messages tooCursor Agent
What was excluded
| Commits in window | 2,232 |
| Merge commits removed | −779 |
| CI / dependency bots removed | −0 |
| Considered | 1,453 |
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 JustVugg/colibri