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.

Code coverage for Ruby with a powerful configuration library and automatic merging of coverage across test suites

01Result

simplecov-ruby/simplecov ↗

simplecov-ruby/simplecov AI coding statistics: 1.8%

of 678 commits in February–September 15, 2026 were committed by an AI agent — a floor, not an estimate

1.8% agent · top contributor 50%4 contributors

team

A small group is using agents. Adoption has spread beyond one person but is not project-wide.

agent commits

666

other considered commits

agent contributors

50%

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

12assisted

0autonomous

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: 6.6%. Bars are scaled to that peak, not to 100%.

Which agents

Agent	Vendor	Commits	Share
Claude Code	Anthropic	7	1%
GitHub Copilot	GitHub	5	0.7%

03Evidence

Inspect the matches

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

Matched commit samples

9cd82f69 on GitHubfix: apply maintainer review to the patch commandClaude Code
704b5ddf on GitHubrefactor: fold single-use patch render helpersClaude Code
b43ee2db on GitHubfix: gate on cross-multiplied ratio to avoid float-division errorClaude Code
55381a2f on GitHubPotential fix for pull request findingGitHub Copilot
ce10db9c on GitHubUse v1 coverage API in finalization docsGitHub Copilot
993ef1f6 on GitHubReference issue for parallel tests changelogGitHub Copilot

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	717
Merge commits removed	−0
CI / dependency bots removed	−39
Considered	678

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 →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 simplecov-ruby/simplecov

Scan another repository

Try

Month	Agent share	Considered commits
2026-02	0%	1
2026-03	4.2%	24
2026-04	0%	27
2026-05	0%	144
2026-06	6.6%	61
2026-07	2.3%	44
2026-08	1.9%	320
2026-09	0%	57