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.

Browser compatibility data for Web technologies as displayed on MDN

01Result

mdn/browser-compat-data ↗

mdn/browser-compat-data AI coding statistics: 0.7%

of 744 commits in February–September 15, 2026 were committed by an AI agent — a floor, not an estimate
0.7% agent · top contributor 100%1 contributor
individual

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

5
agent commits
739
other considered commits
1
agent contributors
100%
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

5assisted
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

Agent-attributed commit share by month
MonthAgent shareConsidered commits
2026-020%100
2026-032%100
2026-040%87
2026-053.1%98
2026-060%79
2026-070%89
2026-080%120
2026-090%71

Peak month: 3.1%. Bars are scaled to that peak, not to 100%.

Which agents

AgentVendorCommitsShare
GitHub CopilotGitHub50.7%

03Evidence

Inspect the matches

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

Matched commit samples

  • bd6c9aa9 on GitHubAdd Chromium bug links for unsupported `text-autospace` values (#29684)GitHub Copilot
  • c35bfbdd on GitHubAdd notes on `text-autospace` initial-value mismatch (#29646)GitHub Copilot
  • cda57eac on GitHubLink Chromium bug for unsupported `:lang()` selector ranges in Chrome (#29GitHub 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 window1,092
Merge commits removed−0
CI / dependency bots removed−348
Considered744

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

Continue exploring

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 mdn/browser-compat-data

Scan another repository

Try