Pulse
2026-09-18-v3.0
Dataset
2026-10-27-catalog-ai-v2
Ruleset
b2e8889c66f7
Scanned
2026-10-27
Window
February–September 15, 2026
Catalog tracking observation. This repository is measured with the same fixed window and ruleset, but it is not part of the published benchmark or its aggregate claims.

An implementation of chunked, compressed, N-dimensional arrays for Python.

01Result

zarr-developers/zarr-python ↗

zarr-developers/zarr-python AI coding statistics: 20.2%

of 272 commits in February–September 15, 2026 were committed by an AI agent — a floor, not an estimate
20.2% agent · top contributor 74.5%10 contributors
team

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

55
agent commits
217
other considered commits
10
agent contributors
74.5%
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

55assisted
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.

Agent share by month

Agent-attributed commit share by month
MonthAgent shareConsidered commits
2026-0230%20
2026-034.9%41
2026-042.9%34
2026-0527.8%36
2026-0671%31
2026-0714.9%47
2026-086.7%30
2026-0915.2%33

Peak month: 71%. Bars are scaled to that peak, not to 100%.

Which agents

AgentVendorCommitsShare
Claude CodeAnthropic5118.8%
GitHub CopilotGitHub41.5%

03Evidence

Inspect the matches

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

Matched commit samples

  • 4484a60b on GitHubdocs(blog): zarr 3.4.0 release post (#4355)Claude Code
  • 4c61dcf0 on GitHubrefactor(store): polish the LocalStore rename retry from #4358 (#4359)Claude Code
  • ef6cfe2d on GitHubfeat(zarr-indexing): factor chunk plans into a columnar GridPartition (#43Claude Code
  • 971d30df on GitHubfix: update OSPO action references to canonical org path (#3856)GitHub Copilot
  • 97d781be on GitHubfix![zarr-metadata]: define JSONValue type, and narrow object annotations GitHub Copilot
  • 229a6906 on GitHubFix grammar, typos, and clarity issues in documentation (#1) (#3693)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 window324
Merge commits removed−0
CI / dependency bots removed−52
Considered272

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

Continue exploring

Claude Code commitsBrowse repositories with detected Claude Code signatures →GitHub Copilot commitsBrowse repositories with detected GitHub Copilot signatures →Python AI coding statisticsCompare evidence across Python repositories →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 zarr-developers/zarr-python

Scan another repository

Try