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home-assistant/core ↗
16.6%
of 12,164 commits were committed by an AI agent — a floor, not an estimate
16.6% agent · top contributor 12.2%398 contributors
org-wide

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

2,024
agent commits
10,140
human commits
398
agent contributors
12.2%
largest contributor

Assisted or autonomous

2020assisted
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 CodeAnthropic12009.9%
GitHub CopilotGitHub8887.3%
Cursor AgentAnysphere280.2%
OpenAI CodexOpenAI10%
Gemini CLIGoogle10%

Verify it yourself

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

  • bb76014abosch_shc: create cover entities for micromodule shutters and blinds (#181Claude Code
  • 08ded881Normalize empty LLM intent targets (#179527)Claude Code
  • 362fa725New integration: INDI Allsky (#179123)Claude Code
  • ec2a00deAdd reconfigure flow to collection_image (#182108)GitHub Copilot
  • 165ddfbbBump PlexAPI to 4.18.2 (#181783)GitHub Copilot
  • 08ded881Normalize empty LLM intent targets (#179527)GitHub Copilot
  • 2de2d6efExpose active Hue scene applied to grouped lights (#151883)Cursor Agent
  • 60aad923Add Tuya ksdjml video peephole camera category (#182145)Cursor Agent
  • 5059007bFix todo item triggers after config entry reload (#181255)Cursor Agent
  • 21937494Add glass break device class for binary_sensor (#181332)OpenAI Codex
  • 7950dd43refactor(`metoffice`): use `dt_util.now` in `weather.py` (#180902)Gemini CLI

What was excluded

Commits in window12,513
Merge commits removed−49
CI / dependency bots removed−300
Considered12,164

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

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