60.3%

of 1,452 commits were committed by an AI agent — a floor, not an estimate

60.3% agent · top contributor 91.7%42 contributors

individual

One person is driving this. The headline number reflects a single contributor's workflow, not a project-wide shift.

875

agent commits

577

human commits

agent contributors

91.7%

largest contributor

Assisted or autonomous

875assisted

0autonomous

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: 83.4%. Bars are scaled to that peak, not to 100%.

Which agents

Claude Code	Anthropic	863	59.4%
GitHub Copilot	GitHub	12	0.8%
Cursor Agent	Anysphere	3	0.2%

Verify it yourself

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

c3a95ba7feat(reader): hide the image viewer controls on tap, closes #6154 (#6183)Claude Code
d6136683fix(annotator): keep a highlight's rounded caps on its own page, closes #6Claude Code
418a2878fix(txt): detect Chinese chapters numbered with 两 or uppercase numerals (#Claude Code
b4d80d2bFix Wayland WebKitGTK window sizing bug on non-CEF Linux builds (#6098)GitHub Copilot
b8d986cbfix(docker): fix Docker image `latest` tag and production runtime errors; GitHub Copilot
0e972069ci: optimize build time for Docker and CI workflows (#4263)GitHub Copilot
9b50ceebfix(tts): play Media Overlay narration via native AVPlayer on iOS (#5562)Cursor Agent
176b950cfix(reader): replace light callout backgrounds in dark mode (#4392)Cursor Agent
458ad751fix(reader): scroll wide EPUB tables horizontally (#4391)Cursor Agent

What was excluded

Commits in window	1,475
Merge commits removed	−0
CI / dependency bots removed	−23
Considered	1,452

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 readest/readest

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