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/mypy ↗

python/mypy AI coding statistics: 1.3%

of 558 commits in February–September 15, 2026 were committed by an AI agent — a floor, not an estimate
1.3% agent · top contributor 28.6%6 contributors
team

A small group is using agents. Adoption has spread beyond one person but is not project-wide.

7
agent commits
551
other considered commits
6
agent contributors
28.6%
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

7assisted
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
2026-021.6%122
2026-030%66
2026-040%144
2026-053.8%78
2026-062.7%37
2026-072.2%45
2026-080%29
2026-090%37

Peak month: 3.8%. Bars are scaled to that peak, not to 100%.

Which agents

AgentVendorCommitsShare
Claude CodeAnthropic50.9%
OpenAI CodexOpenAI20.4%

03Evidence

Inspect the matches

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

Matched commit samples

  • 79a769ac on GitHub[mypyc] Fix reference leak when setting unboxed refcounted attrs (#21657)Claude Code
  • d23f5f00 on GitHubFix false positive "Expected TypedDict key to be string literal" for UnionClaude Code
  • 5e0c2749 on GitHub[mypyc] Fix cross-group call to inherited __mypyc_defaults_setup (#21481)Claude Code
  • 60fa82e5 on GitHubFix strict optional with generic defaults (#21788)OpenAI Codex
  • f59f649b on GitHubFix changelog for mypy 2.1 (#21565)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 window566
Merge commits removed−0
CI / dependency bots removed−8
Considered558

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/mypy
Default branch
master
Resolved HEAD
7e00ff07012c706f6b3370bc3194ae7398820221 ↗
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 position23rd percentile

Midrank percentile; equal shares split the tied positions.

Repository
1.3%
Cohort median
6.3%
Share rank
188 / 247
0th50th100th

Percentile = (repositories below + half of 5 tied repositories) ÷ 247.

Continue exploring

Claude Code commitsBrowse repositories with detected Claude Code 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 python/mypy

Scan another repository

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