52.6%

of 1,391 commits were committed by an AI agent — a floor, not an estimate

52.6% agent · top contributor 21.6%106 contributors

org-wide

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

731

agent commits

660

human commits

106

agent contributors

21.6%

largest contributor

Assisted or autonomous

570assisted

161autonomous

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: 72.5%. Bars are scaled to that peak, not to 100%.

Which agents

GitHub Copilot	GitHub	467	33.6%
Claude Code	Anthropic	292	21%
Cursor Agent	Anysphere	5	0.4%

Verify it yourself

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

1d5106f5Add OpenUP Governance preset to community catalog (#4596)GitHub Copilot
abe0d1deAdd OpenUP Governed Lifecycle extension to community catalog (#4598)GitHub Copilot
10270e16Update adrkit extension to v0.1.4 (#4600)GitHub Copilot
4c1db740fix(integrations): dispatch bob commands via `bob run` (#4492)Claude Code
42153451fix(events): cap stdin in the generated dispatcher, not just the CLI commaClaude Code
e4842a03docs(core): SPECIFY_FEATURE sets the feature label, not the feature directClaude Code
39f2ac3cclarify: require real interrogatives, ban topic-label questions (#3745)Cursor Agent
82c078bbdocs: clarify that release tags keep the leading v prefix (#3463)Cursor Agent
8e5643d4fix(cursor-agent): enable headless CLI dispatch end-to-end (-p --trust --aCursor Agent

What was excluded

Commits in window	1,451
Merge commits removed	−3
CI / dependency bots removed	−57
Considered	1,391

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 github/spec-kit

Scan another repository

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