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: 73.8%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 109 | 19.6% |
| GitHub Copilot | GitHub | 3 | 0.5% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
73f5e2d1fix(sentry): sample traces and session replays to stay under quotaClaude Code8ce68f1afix(farcaster): show the approval QR in a modal instead of a blank tabClaude Codef23ebf72fix(farcaster): throttle the public signer status routeClaude Code1450d876chore: add EVOLINK_API_KEY to .env.exampleGitHub Copilotc285f6e5feat: address code reviewGitHub Copilote419e05fApply suggestions from code reviewGitHub Copilot
What was excluded
| Commits in window | 705 |
| Merge commits removed | −149 |
| CI / dependency bots removed | −0 |
| Considered | 556 |
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 gitroomhq/postiz-app