16.7%

of 24,854 commits were committed by an AI agent — a floor, not an estimate

16.7% agent · top contributor 8.3%159 contributors

org-wide

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

4,155

agent commits

20,699

human commits

159

agent contributors

8.3%

largest contributor

Assisted or autonomous

4107assisted

48autonomous

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: 23.8%. Bars are scaled to that peak, not to 100%.

Which agents

Claude Code	Anthropic	3969	16%
Cursor Agent	Anysphere	121	0.5%
GitHub Copilot	GitHub	92	0.4%
OpenAI Codex	OpenAI	2	0%

Verify it yourself

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

04dabfccfeat(replay-vision): have scanners judge how notable a session is (#99483)Claude Code
bda79c29fix(desktop): improve self-driving report dialogs (#100815)Claude Code
d89bcde7fix(lemon-ui): make modals scrollable on mobile Safari (#78305)Claude Code
38ae7b0efix(mcp): advertise exec tool annotations on tools/list (#101294)Cursor Agent
482536bbchore(conversations): support reply eval harness (#100918)Cursor Agent
06e90ce8feat(business knowledge): search pagination filters (#100822)Cursor Agent
7cba4577feat(reviewhog): put issue description first in finding comments (#93907)GitHub Copilot
e376772cfix(cohorts): stop server-side cursor scan in dependency cache warm (#7597GitHub Copilot
562c9a85fix(hogql): drop the unbounded count from property autocomplete (#85984)GitHub Copilot
36b49cb6chore(devex): stop typegen from dirtying untouched logic files (#100420)OpenAI Codex
ec7e37fafix(insights): default stickiness sql expression to person_id (#53854)OpenAI Codex

What was excluded

Commits in window	27,160
Merge commits removed	−0
CI / dependency bots removed	−2,306
Considered	24,854

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 PostHog/posthog

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