Pulse
2026-09-18-v3.0
Dataset
2026-09-18-v3.0
Ruleset
b2e8889c66f7
Scanned
2026-09-16
Window
February–September 15, 2026
Local to this browser

01Result

biomejs/biome ↗

biomejs/biome AI coding statistics: 4.2%

of 1,373 commits in February–September 15, 2026 were committed by an AI agent — a floor, not an estimate
4.2% agent · top contributor 46.6%14 contributors
org-wide

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

58
agent commits
1,315
other considered commits
14
agent contributors
46.6%
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

58assisted
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. Across the whole index, 96% of agent commits are assisted.

Agent share by month

Agent-attributed commit share by month
MonthAgent shareConsidered commits
2026-022.1%145
2026-031%205
2026-042.4%247
2026-050%167
2026-066.2%130
2026-0713.1%153
2026-088.6%185
2026-092.1%141

Peak month: 13.1%. Bars are scaled to that peak, not to 100%.

Which agents

AgentVendorCommitsShare
Claude CodeAnthropic513.7%
GitHub CopilotGitHub50.4%
OpenAI CodexOpenAI40.3%

03Evidence

Inspect the matches

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

Matched commit samples

  • 71eaa0d6 on GitHubfeat(lint/html/svelte): add noSvelteAtDebugTags (#11754)Claude Code
  • 21a10cfc on GitHubfix(type-inference): infer callback parameter types from call signatures (Claude Code
  • d0b67c88 on GitHubfeat(js_plugin): support TypeScript plugins (#11418)Claude Code
  • 5eb5f09b on GitHubfeat(biome_js_analyze): implement useValidTestTitle rule (#9176) (#11725)GitHub Copilot
  • 2093e3ee on GitHubfeat: implement useSortedEnumMembers (#10000)GitHub Copilot
  • 2056b238 on GitHubfeat(html): port useKeyWithClickEvents a11y rule to HTML (#9495)GitHub Copilot
  • 21a10cfc on GitHubfix(type-inference): infer callback parameter types from call signatures (OpenAI Codex
  • 97628275 on GitHubfeat(js_plugin): runtime AST bindings for JS plugins (#10954)OpenAI Codex
  • d150071b on GitHubfeat(formatter/yaml): initial implementation for block sequences (#10529)OpenAI Codex

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 window1,647
Merge commits removed−36
CI / dependency bots removed−238
Considered1,373

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

05Provenance

Pinned to a source state

This observation names the repository state, release, and detector that produced it. Use these identifiers when reproducing or citing the result.

Dataset release
2026-09-18-v3.0
Scan date
2026-09-16
Ruleset
sha256:b2e8889c66f72c18a61839f0bf1a9f77b5481ba2def044dba33c797b2f2bdcae
Canonical repository
biomejs/biome
Default branch
main
Resolved HEAD
d47dc24888fdcf1e87f68d785862de26a2f3fcb6 ↗
Resolved
2026-09-16
Measurement window
February–September 15, 2026
Download observation JSONDeterministic export · same values as this page

06Peer context

Position among comparable repositories

The cohort uses the same release and measurement window, then narrows to the repository’s ecosystem and removes low-activity observations.

CohortRust · 117 eligible repositories · at least 100 considered commits2026-09-18-v3.0 · February–September 15, 2026 · 33 of 150 ecosystem repositories excluded
Agent-commit share position65th percentile

Midrank percentile; equal shares split the tied positions.

Repository
4.2%
Cohort median
2%
Share rank
42 / 117
0th50th100th

Percentile = (repositories below + half of 1 tied repository) ÷ 117.

Continue exploring

Claude Code commitsBrowse repositories with detected Claude Code signatures →GitHub Copilot commitsBrowse repositories with detected GitHub Copilot signatures →OpenAI Codex commitsBrowse repositories with detected OpenAI Codex 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 biomejs/biome

Scan another repository

Try