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

python/cpython ↗

python/cpython AI coding statistics: 10.5%

of 3,120 commits in February–September 15, 2026 were committed by an AI agent — a floor, not an estimate
10.5% agent · top contributor 90%19 contributors
individual

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

329
agent commits
2,791
other considered commits
19
agent contributors
90%
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

329assisted
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
2026-010%1
2026-021.3%307
2026-030.7%407
2026-041.1%367
2026-050.4%448
2026-0621.6%486
2026-0731%500
2026-0810.4%384
2026-097.3%220

Peak month: 31%. Bars are scaled to that peak, not to 100%.

Which agents

AgentVendorCommitsShare
Claude CodeAnthropic32710.5%
GitHub CopilotGitHub20.1%

03Evidence

Inspect the matches

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

Matched commit samples

  • a844747b on GitHubgh-117404: Add structured version info for compression modules (GH-150567)Claude Code
  • fd0970c0 on GitHubgh-156713: Fix test_nturl2path for non-UTF-8 filesystem encodings (GH-1574Claude Code
  • ae0d6cc7 on GitHubgh-66172: Don't let a corrupt config file prevent IDLE from starting (#152Claude Code
  • 832d5571 on GitHubgh-152068: Reset PyREPL Colors on prompt finish (#152108)GitHub Copilot
  • c8799f13 on GitHubgh-149035: Modernize legacy Python patterns in `Doc/tutorial/stdlib2.rst` GitHub 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 window3,128
Merge commits removed−3
CI / dependency bots removed−5
Considered3,120

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
python/cpython
Default branch
main
Resolved HEAD
7f52444d9b593413e6dd376f211dcbb58cc130f4 ↗
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 position61st percentile

Midrank percentile; equal shares split the tied positions.

Repository
10.5%
Cohort median
6.3%
Share rank
97 / 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 python/cpython

Scan another repository

Try