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: 29.3%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 27 | 4.1% |
| GitHub Copilot | GitHub | 18 | 2.7% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
29ebe64aPin ESPAsyncWebServer to commit SHA instead of tagClaude Code6d1cc5d7Trim .clang-format to a minimal, empirically-tuned rule setClaude Code15dabfa6Encapsulate rolloverMillis with a read-only accessorClaude Coded884a3e6Pin andelf/nightly-release tospecific commit SHA instead of @main branch (GitHub Copilot58bf4c83add secure coding guides for AI reviews (#5572)GitHub Copilot59c5991dAdd esp8266_2m_min minimal build env for ESP02 OTA recoveryGitHub Copilot
What was excluded
| Commits in window | 791 |
| Merge commits removed | −121 |
| CI / dependency bots removed | −6 |
| Considered | 664 |
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 wled/WLED