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: 12%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 7 | 2.9% |
| Cursor Agent | Anysphere | 3 | 1.3% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
ccd78d9efix(remove): only offer directories that hold a SKILL.mdClaude Code4c719f3ffix(remove): keep the lock entry while another agent still uses the skillClaude Code1ec639eePin GPG import action to maintainer-owned fork by SHAClaude Codede5f163bfix: reject Azure Repos path traversal and skip commit version refsCursor Agent2128a531fix: parse Azure Repos /_git/ URLs as git sourcesCursor Agent7551d49afix(update): preserve non-GitHub lock sourcesCursor Agent
What was excluded
| Commits in window | 352 |
| Merge commits removed | −81 |
| CI / dependency bots removed | −33 |
| Considered | 238 |
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 vercel-labs/skills