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: 25%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 12 | 1.6% |
| GitHub Copilot | GitHub | 4 | 0.5% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
20678c9afix: return fallback gracefully when requested fallback font is missingClaude Code53e58d8bMake ItemUpdateController.UpdateItem internal instead of reflectionClaude Coded7727224Skip corrupt KeyframeData rows during full system backupClaude Code3df58ab7Potential fix for pull request findingGitHub Copilot127d924cfixGitHub Copilot1dd8541efix ci failedGitHub Copilot
What was excluded
| Commits in window | 1,638 |
| Merge commits removed | −489 |
| CI / dependency bots removed | −412 |
| Considered | 737 |
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 jellyfin/jellyfin