16.5%

of 11,618 commits were committed by an AI agent — a floor, not an estimate

16.5% agent · top contributor 12.9%375 contributors

org-wide

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

1,918

agent commits

9,700

human commits

375

agent contributors

12.9%

largest contributor

Assisted or autonomous

1914assisted

4autonomous

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: 23.4%. Bars are scaled to that peak, not to 100%.

Which agents

Claude Code	Anthropic	1136	9.8%
GitHub Copilot	GitHub	845	7.3%
Cursor Agent	Anysphere	24	0.2%
Gemini CLI	Google	1	0%

Verify it yourself

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

ee57c85aBump wh-python to 2026.9.3 (#181065)Claude Code
23af6097Fix SMTP attaching valid images as files when content sniffing fails (#176Claude Code
edb7dc8bComplete Subaru config flow error tests to CREATE_ENTRY (#181033)Claude Code
93751f27Add reconfigure flow for Midea (#180878)GitHub Copilot
f04652b3Deprecate modbus get_hub in favour of async_get_unit (#179933)GitHub Copilot
a34ee857Media selector to retain metadata for presentation (#180454)GitHub Copilot
df4808f6Add missing husqvarna_automower error keys (#181150)Cursor Agent
45615ec7Stop rounding Amber Electric prices to 2 decimal places (#181157)Cursor Agent
a1e69277Explicitly set parallel-updates for OpenAI Conversation (#178110)Cursor Agent
7950dd43refactor(`metoffice`): use `dt_util.now` in `weather.py` (#180902)Gemini CLI

What was excluded

Commits in window	11,947
Merge commits removed	−49
CI / dependency bots removed	−280
Considered	11,618

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 home-assistant/core

Scan another repository

Try