Pulse
2026-09-18-v3.0
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.

CSS Working Group Editor Drafts

01Result

w3c/csswg-drafts ↗

w3c/csswg-drafts AI coding statistics: 1.2%

of 840 commits in February–September 15, 2026 were committed by an AI agent — a floor, not an estimate
1.2% agent · top contributor 80%3 contributors
individual

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

10
agent commits
830
other considered commits
3
agent contributors
80%
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

9assisted
1autonomous

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

Agent-attributed commit share by month
MonthAgent shareConsidered commits
2026-020%116
2026-030%120
2026-040.8%127
2026-053%99
2026-060%95
2026-076.9%72
2026-080.9%114
2026-090%97

Peak month: 6.9%. Bars are scaled to that peak, not to 100%.

Which agents

AgentVendorCommitsShare
Claude CodeAnthropic81%
GitHub CopilotGitHub20.2%

03Evidence

Inspect the matches

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

Matched commit samples

  • 65787fbf on GitHub[css-color-4][editorial] add generator for the Oklrab Lr vs L diagramClaude Code
  • df2044c0 on GitHub[css-color-hdr][editorial] Add JzCzhz prim-sec diagram to the JzCzhz sectiClaude Code
  • 7b804b8f on GitHub[css-color-hdr][editorial] Add Jzazbz prim-sec diagram and its generator sClaude Code
  • 1df9846d on GitHubInitial planGitHub Copilot
  • 75c4d3e4 on GitHub[css-pseudo] Extend CSSPseudoElement to all standardized non-element-backeGitHub 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 window840
Merge commits removed−0
CI / dependency bots removed−0
Considered840

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 w3c/csswg-drafts

Scan another repository

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