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

apache/arrow ↗

apache/arrow AI coding statistics: 2.8%

of 760 commits in February–September 15, 2026 were committed by an AI agent — a floor, not an estimate
2.8% agent · top contributor 23.8%16 contributors
org-wide

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

21
agent commits
739
other considered commits
16
agent contributors
23.8%
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

21assisted
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
2026-021%98
2026-030%91
2026-040%84
2026-053.1%64
2026-065.3%113
2026-075.4%149
2026-081.2%85
2026-093.9%76

Peak month: 5.4%. Bars are scaled to that peak, not to 100%.

Which agents

AgentVendorCommitsShare
GitHub CopilotGitHub192.5%
Claude CodeAnthropic20.3%

03Evidence

Inspect the matches

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

Matched commit samples

  • 20373450 on GitHubGH-51199: [CI] Limit concurrent PRs from new contributors (#51200)GitHub Copilot
  • 248d6037 on GitHubGH-51098: [Release] Update CHANGELOG.md as a post release task (#51117)GitHub Copilot
  • b12755a1 on GitHubGH-47686: [Docs][Python] Split the Python Parquet docs into separate itemsGitHub Copilot
  • a769c291 on GitHubGH-45086: [C++] Fix heap buffer overflow in FillNullForward/Backward … (#5Claude Code
  • c20a04a0 on GitHubGH-35806: [R] Improve error message for null type inference with sparse CSClaude Code

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 window786
Merge commits removed−0
CI / dependency bots removed−26
Considered760

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
apache/arrow
Default branch
main
Resolved HEAD
b27423828326fb3047b59626fd5ff3093347de38 ↗
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.

CohortC/C++ · 127 eligible repositories · at least 100 considered commits2026-09-18-v3.0 · February–September 15, 2026 · 51 of 178 ecosystem repositories excluded
Agent-commit share position75th percentile

Midrank percentile; equal shares split the tied positions.

Repository
2.8%
Cohort median
0.4%
Share rank
32 / 127
0th50th100th

Percentile = (repositories below + half of 1 tied repository) ÷ 127.

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 apache/arrow

Scan another repository

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