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: 40.9%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 11 | 8.8% |
| Cursor Agent | Anysphere | 2 | 1.6% |
| GitHub Copilot | GitHub | 1 | 0.8% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
b26918f5docs(style-guide): Cyrillic labels — Noto Serif title fallback (#221)Claude Code3a1a7e09fix(doctor): fall through a python3 that cannot report its version (#201)Claude Coded0a0f464feat(patterns): add traceable block decomposition semantic pattern (#169)Claude Code899579b4feat: import Excalidraw diagrams for editorial redraw (#192)Cursor Agent48fecccdfeat: add a waterfall chart visual type (#191)Cursor Agentfc9c0be3docs: add GitHub Copilot marketplace install (#218)GitHub Copilot
What was excluded
| Commits in window | 169 |
| Merge commits removed | −29 |
| CI / dependency bots removed | −15 |
| Considered | 125 |
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 cathrynlavery/diagram-design