2.7%

of 4,262 commits were committed by an AI agent — a floor, not an estimate

2.7% agent · top contributor 12.8%54 contributors

org-wide

Adoption is broad. Many contributors are committing agent-authored work, which is what a real organisational rollout looks like.

117

agent commits

4,145

human commits

agent contributors

12.8%

largest contributor

Assisted or autonomous

114assisted

3autonomous

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

Feb26

Mar26

Apr26

May26

Jun26

Jul26

Aug26

Sep26

Peak month: 6.5%. Bars are scaled to that peak, not to 100%.

Which agents

Claude Code	Anthropic	107	2.5%
Cursor Agent	Anysphere	5	0.1%
GitHub Copilot	GitHub	5	0.1%
OpenAI Codex	OpenAI	1	0%

Verify it yourself

Sample commits that matched. Every one links to GitHub — check the trailers.

3314cd38[observe] update README.md (#49360)Claude Code
b093b4fd[ios][autolinking] Read prebuilt XCFramework Info.plists in a single tar pClaude Code
49e89cda[ios][autolinking] Add prebuilt-metadata command emitting the identity joiClaude Code
c630d360[brownfield][Android] Tie React Native surface lifetime to its container (Cursor Agent
7c961e29[android][media-library] Parallelize EXIF location reads in getAssetsAsyncCursor Agent
2918c5a6[ios][screen-capture] Detach recording overlay when allowing screen capturCursor Agent
54b92480[docs] Update Upgrade Expo SDK guide for SDK 56 (#46112)GitHub Copilot
8652bf9c[docs] Align CONTRIBUTING guidance, PR Checklist and Stale link (#44867)GitHub Copilot
3eca8f5bfix(expo-brownfield): unwrap native event in addSharedStateListener (#4440GitHub Copilot
9886c0c1[ios][widgets] Avoid applying Text modifiers twice (#49535)OpenAI Codex

What was excluded

Commits in window	4,295
Merge commits removed	−0
CI / dependency bots removed	−33
Considered	4,262

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 expo/expo

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