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: 4.1%. Bars are scaled to that peak, not to 100%.
Which agents
| Gemini CLI | 90 | 2.7% | |
| Claude Code | Anthropic | 1 | 0% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
bd40e716Deprecate legacy gen_defaults tool (#191911)Gemini CLI1480514e[UIScene] Migrate dev/benchmarks/complex_layout to UIScene lifecycle (#191Gemini CLI7c25794b[rules] Add packages/flutter_tools/gradle/AGENTS.md rules (#191486)Gemini CLIf68aaca9Add FlatBuffers Verifier checks to Impeller asset loading (#187878)Claude Code
What was excluded
| Commits in window | 3,341 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −29 |
| Considered | 3,312 |
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 flutter/flutter