Adoption is broad. Many contributors are committing agent-authored work, which is what a real organisational rollout looks like.
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: 17.9%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 18 | 6.6% |
| GitHub Copilot | GitHub | 6 | 2.2% |
| Cursor Agent | Anysphere | 1 | 0.4% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
5c4a805efile-conversion: fix base64 argv limit, harden output path, update countsClaude Code56ba12c1fix: update agent and skill counts in marketplace metadataClaude Codec8e2c8ddfix: restore license field in SKILL.md lost during rebaseClaude Codef5ad900ecopilot: symlink command directories to ~/.copilot/<plugin>/commands/GitHub Copilot9a178cb0copilot: ensure command frontmatter has description (synthesize from H1 whGitHub Copilot52ced895Automate Copilot cache clearing in install processGitHub Copilot2f9990ddAdd operating-kit plugin: session lifecycle, code-review, deploy, prod-logCursor Agent
What was excluded
| Commits in window | 364 |
| Merge commits removed | −55 |
| CI / dependency bots removed | −36 |
| Considered | 273 |
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 wshobson/agents