3.3%

of 2,036 commits were committed by an AI agent — a floor, not an estimate

3.3% agent · top contributor 26.5%18 contributors

org-wide

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

agent commits

1,968

human commits

agent contributors

26.5%

largest contributor

Assisted or autonomous

68assisted

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: 8.5%. Bars are scaled to that peak, not to 100%.

Which agents

Claude Code

Anthropic

3.3%

Verify it yourself

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

aafacb1cmacOS: fix flickering when creating new tab with glass styleClaude Code
caf48a41main: fix inverted allow_stack_tracing conditionClaude Code
6229d4ebmacOS: fix AppleScript send key for non-control keysClaude Code

What was excluded

Commits in window	3,458
Merge commits removed	−1,055
CI / dependency bots removed	−367
Considered	2,036

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 ghostty-org/ghostty

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