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: 3%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 79 | 1.7% |
| GitHub Copilot | GitHub | 7 | 0.1% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
65308f40google_ai: Add Gemini 3.6 Flash (#62010)Claude Code35cb7558editor: Add configurable git gutter width setting (#61304)Claude Code5638be1flanguage_models: Stop logging noisy ChatGPT Subscription auth errors on stClaude Code02aabb9cproject_panel: Add expand/collapse all to context menu (#59567)GitHub Copilot3afcafe3agent: Return clear error when read_file tool path is a directory (#54303)GitHub Copilot8420716banthropic: Preserve custom model thinking mode after thinking-toggle refacGitHub Copilot
What was excluded
| Commits in window | 4,819 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −35 |
| Considered | 4,784 |
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 zed-industries/zed