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

pandas-dev/pandas ↗

pandas-dev/pandas AI coding statistics: 57.8%

of 1,765 commits in February–September 15, 2026 were committed by an AI agent — a floor, not an estimate
57.8% agent · top contributor 97.4%18 contributors
individual

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

1,020
agent commits
745
other considered commits
18
agent contributors
97.4%
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

1020assisted
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%146
2026-0346.7%323
2026-0460.4%235
2026-0555.7%174
2026-0663.2%182
2026-0777.1%231
2026-0864%261
2026-0978.4%213

Peak month: 78.4%. Bars are scaled to that peak, not to 100%.

Which agents

AgentVendorCommitsShare
Claude CodeAnthropic101957.7%
GitHub CopilotGitHub10.1%

03Evidence

Inspect the matches

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

Matched commit samples

  • 41c136dd on GitHubPERF: read_csv converts numeric columns in the batched row-blocked sweep (Claude Code
  • a290443f on GitHubBUG: infer_freq returned "B"/"bh" for indexes with fractional day/hour gapClaude Code
  • a77f7cd8 on GitHubBUG: convert_dtypes casting a float to int without a range guard (GH#68315Claude Code
  • c6ee3150 on GitHubDOC: Fix invalid Sphinx cross-references in older whatsnew RST files (#644GitHub 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 window1,856
Merge commits removed−0
CI / dependency bots removed−91
Considered1,765

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
pandas-dev/pandas
Default branch
main
Resolved HEAD
f60d9048ca5983075b493bc5d827b83e11735af0 ↗
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.

CohortPython · 247 eligible repositories · at least 100 considered commits2026-09-18-v3.0 · February–September 15, 2026 · 145 of 392 ecosystem repositories excluded
Agent-commit share position95th percentile

Midrank percentile; equal shares split the tied positions.

Repository
57.8%
Cohort median
6.3%
Share rank
13 / 247
0th50th100th

Percentile = (repositories below + half of 1 tied repository) ÷ 247.

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 pandas-dev/pandas

Scan another repository

Try