Dataset: 2026-10-27-catalog-ai-v2
Ruleset: b2e8889c66f7
Scanned: 2026-10-27
Window: February–September 15, 2026

Catalog tracking observation. This repository is measured with the same fixed window and ruleset, but it is not part of the published benchmark or its aggregate claims.

📺 Homebrew's official macOS GUI

01Result

Homebrew/BrewUI ↗

Homebrew/BrewUI AI coding statistics: 48.5%

of 881 commits in February–September 15, 2026 were committed by an AI agent — a floor, not an estimate

48.5% agent · top contributor 94.6%3 contributors

individual

One person is driving this. The headline number reflects a single contributor's workflow, not a project-wide shift.

427

agent commits

454

other considered commits

agent contributors

94.6%

largest contributor

02Drivers

What shapes this result

Mode, timing, and detected signatures show whether the result reflects broad adoption or one concentrated workflow.

Assisted or autonomous

424assisted

3autonomous

Assisted — a developer’s identity authored the commit and the agent added itself as co-author. Autonomous — a bot identity authored the commit without a human identity attached.

Agent share by month

Peak month: 79.5%. Bars are scaled to that peak, not to 100%.

Which agents

Agent	Vendor	Commits	Share
Claude Code	Anthropic	392	44.5%
GitHub Copilot	GitHub	23	2.6%
Cursor Agent	Anysphere	12	1.4%

03Evidence

Inspect the matches

Public commit samples let you inspect the signatures behind the aggregate result.

Matched commit samples

7357a220 on GitHubScope the ⌘R doctor re-check to the Doctor screenClaude Code
b66d96f7 on GitHubWait for a readiness signal instead of a wall clock in the dedup testClaude Code
9eb829fa on GitHubCut the branch's comments back to what the code cannot sayClaude Code
2e05e9eb on GitHubUpdate outdated commentGitHub Copilot
2a8867c9 on GitHubAdd Brewfile to pathsGitHub Copilot
5a226b30 on GitHubInstall mintGitHub Copilot
2a98734d on GitHubSpeed up BrewUILint CI and document local caching.Cursor Agent
cabdd688 on GitHubFix BrewUILint CI step for macOS Bash 3.2.Cursor Agent
7e9ef0c6 on GitHubMatch PackageIDRule only on types ending with Package.Cursor Agent

04Method

What entered the denominator

The result begins with commit history, removes merges and routine automation, and reports literal agent signatures as a lower bound.

Exclusion ledger

Commits in window	1,095
Merge commits removed	−167
CI / dependency bots removed	−47
Considered	881

Bots are excluded from the denominator entirely. Agent attribution requires a literal supported signature; no code-style inference is used.

Continue exploring

Claude Code commitsBrowse repositories with detected Claude Code signatures →GitHub Copilot commitsBrowse repositories with detected GitHub Copilot signatures →Cursor Agent commitsBrowse repositories with detected Cursor Agent signatures →Swift AI coding statisticsCompare evidence across Swift repositories →GitHub AI commit analyzerInspect another repository with the same evidence model →

Reproduce this observation

Run the same detector locally.

Deterministic signature matching; no code-style inference. Squash merges can remove trailers, so this result remains a measured floor.

npx qmmit-cli Homebrew/BrewUI

Scan another repository

Try

Month	Agent share	Considered commits
2026-03	0%	35
2026-04	0%	80
2026-05	39%	287
2026-06	58.5%	130
2026-07	65.8%	149
2026-08	79.5%	83
2026-09	64.1%	117