30.1%

of 3,922 commits were committed by an AI agent — a floor, not an estimate

30.1% agent · top contributor 62.1%117 contributors

team

A small group is using agents. Adoption has spread beyond one person but is not project-wide.

1,180

agent commits

2,742

human commits

117

agent contributors

62.1%

largest contributor

Assisted or autonomous

1146assisted

34autonomous

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: 68.6%. Bars are scaled to that peak, not to 100%.

Which agents

OpenAI Codex	OpenAI	579	14.8%
Claude Code	Anthropic	561	14.3%
Cursor Agent	Anysphere	90	2.3%
GitHub Copilot	GitHub	2	0.1%
Devin	Cognition	1	0%

Verify it yourself

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

6dbea7edchore(mobile): bump app version to 1.2.0OpenAI Codex
b2847156chore(mobile): bump app version to 1.1.1OpenAI Codex
1d1bf504chore(mobile): bump app version to 1.1.0OpenAI Codex
96bddf81fix(desktop): paste as text no longer doubles the pasted text (#11958)Claude Code
2c19283afeat(server): persist the worktree setup send and progress on the thread (Claude Code
0310cbf9fix: keep worktree setup visible after leaving and reopening the thread (#Claude Code
211618fdperf(web): huge-thread switch no longer blanks the chat pane (#11169)Cursor Agent
dadba6d9fix(web): remember Composer Fast mode across new chats (#2981)Cursor Agent
d5825e1dfix(web): stop clipping the traits chevron on long Codex effort labels (#9Cursor Agent
0a88719aImprove Linux desktop identity packaged builds (#1201)GitHub Copilot
0763a35fFix `bun run dev:desktop` from not terminating properly on SIGINT/SIGTERM/GitHub Copilot
53e3c98afeat(web): themed sidebar header art for nightly and dev builds (#4130)Devin

What was excluded

Commits in window	4,033
Merge commits removed	−15
CI / dependency bots removed	−96
Considered	3,922

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 pingdotgg/t3code

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